GNU C Library NEWS -- history of user-visible changes. Copyright (C) 1992-2022 Free Software Foundation, Inc. See the end for copying conditions. Please send GNU C library bug reports via using `glibc' in the "product" field. Version 2.36 Major new features: * Support for DT_RELR relative relocation format has been added to glibc. This is a new ELF dynamic tag that improves the size of relative relocations in shared object files and position independent executables (PIE). DT_RELR generation requires linker support for -z pack-relative-relocs option, which is supported for some targets in recent binutils versions. Lazy binding doesn't apply to DT_RELR. * On Linux, the pidfd_open, pidfd_getfd, and pidfd_send_signal functions have been added. The pidfd functionality provides access to a process while avoiding the issue of PID reuse on tranditional Unix systems. * On Linux, the process_madvise function has been added. It has the same functionality as madvise but alters the target process identified by the pidfd. * On Linux, the process_mrelease function has been added. It allows a caller to release the memory of a dying process. The release of the memory is carried out in the context of the caller, using the caller's CPU affinity, and priority with CPU usage accounted to the caller. * The “no-aaaa” DNS stub resolver option has been added. System administrators can use it to suppress AAAA queries made by the stub resolver, including AAAA lookups triggered by NSS-based interfaces such as getaddrinfo. Only DNS lookups are affected: IPv6 data in /etc/hosts is still used, getaddrinfo with AI_PASSIVE will still produce IPv6 addresses, and configured IPv6 name servers are still used. To produce correct Name Error (NXDOMAIN) results, AAAA queries are translated to A queries. The new resolver option is intended primarily for diagnostic purposes, to rule out that AAAA DNS queries have adverse impact. It is incompatible with EDNS0 usage and DNSSEC validation by applications. * On Linux, the fsopen, fsmount, move_mount, and fsconfig functions have been added. They are part of the new Linux kernel mount APIs that allow applications to more flexibly configure and operate on filesystem mounts. The new mount APIs are specifically designed to work with namespaces. * localedef now accepts locale definition files encoded in UTF-8. Previously, input bytes not within the ASCII range resulted in unpredictable output. Deprecated and removed features, and other changes affecting compatibility: * Support for prelink will be removed in the next release; this includes removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment variables and their functionality in the dynamic loader. * The Linux kernel version check has been removed along with the LD_ASSUME_KERNEL environment variable. The minimum kernel used to built glibc is still provided through NT_GNU_ABI_TAG ELF note and also printed when libc.so is issued directly. * On Linux, The LD_LIBRARY_VERSION environment variable has been removed. Changes to build and runtime requirements: [Add changes to build and runtime requirements here] Security related changes: [Add security related changes here] The following bugs are resolved with this release: [The release manager will add the list generated by scripts/list-fixed-bugs.py just before the release.] Version 2.35 Major new features: * Unicode 14.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 14.0.0, using generator scripts contributed by Mike FABIAN (Red Hat). * Bump r_version in the debugger interface to 2 and add a new field, r_next, support multiple namespaces. * Support for the C.UTF-8 locale has been added to glibc. The locale supports full code-point sorting for all valid Unicode code points. A limitation in the framework for fnmatch, regexec, and regcomp requires a compromise to save space and only ASCII-based range expressions are supported for now (see bug 28255). The full size of the locale is only ~400KiB, with 346KiB coming from LC_CTYPE information for Unicode. This locale harmonizes downstream C.UTF-8 already shipping in various downstream distributions. The locale is not built into glibc, and must be installed. * functions that round their results to a narrower type, and corresponding macros, are added from TS 18661-1:2014, TS 18661-3:2015 and draft ISO C2X: - fsqrt, fsqrtl, dsqrtl and corresponding fMsqrtfN, fMsqrtfNx, fMxsqrtfN and fMxsqrtfNx functions. - ffma, ffmal, dfmal and corresponding fMfmafN, fMfmafNx, fMxfmafN and fMxfmafNx functions. * functions for floating-point maximum and minimum, corresponding to new operations in IEEE 754-2019, and corresponding macros, are added from draft ISO C2X: fmaximum, fmaximum_num, fmaximum_mag, fmaximum_mag_num, fminimum, fminimum_num, fminimum_mag, fminimum_mag_num and corresponding functions for float, long double, _FloatN and _FloatNx. * macros for single-precision float constants are added as a GNU extension: M_Ef, M_LOG2Ef, M_LOG10Ef, M_LN2f, M_LN10f, M_PIf, M_PI_2f, M_PI_4f, M_1_PIf, M_2_PIf, M_2_SQRTPIf, M_SQRT2f and M_SQRT1_2f. * The __STDC_IEC_60559_BFP__ and __STDC_IEC_60559_COMPLEX__ macros are predefined as specified in TS 18661-1:2014. * The exp10 functions in now have a corresponding type-generic macro in . * The ISO C2X macro _PRINTF_NAN_LEN_MAX has been added to . * printf-family functions now support the %b format for output of integers in binary, as specified in draft ISO C2X, and the %B variant of that format recommended by draft ISO C2X. * A new DSO sorting algorithm has been added in the dynamic linker that uses topological sorting by depth-first search (DFS), solving performance issues of the existing sorting algorithm when encountering particular circular object dependency cases. * A new tunable, glibc.rtld.dynamic_sort, can be used to select between the two DSO sorting algorithms. The default setting of '2' uses the new DFS-based algorithm. The setting '1' switches to the old algorithm used in glibc 2.33 and earlier. * ABI support for a new function '__memcmpeq'. '__memcmpeq' is meant to be used by compilers for optimizing usage of 'memcmp' when its return value is only used for its boolean status. * Support for automatically registering threads with the Linux rseq system call has been added. This system call is implemented starting from Linux 4.18. The Restartable Sequences ABI accelerates user-space operations on per-cpu data. It allows user-space to perform updates on per-cpu data without requiring heavy-weight atomic operations. Automatically registering threads allows all libraries, including libc, to make immediate use of the rseq support by using the documented ABI, via the __rseq_flags, __rseq_offset, and __rseq_size variables. The GNU C Library manual has details on integration of Restartable Sequences. * A symbolic link to the dynamic linker is now installed under /usr/bin/ld.so (or more precisely, '${bindir}/ld.so'). * All programs and the testsuite in glibc are now built as position independent executables (PIE) by default on toolchains and architectures that support it. Further, if the toolchain and architecture supports it, even static programs are built as PIE and the resultant glibc can be used to build static PIE executables. A new option --disable-default-pie has been added to disable this behavior and get a non-PIE build. This option replaces --enable-static-pie, which no longer has any effect on the build configuration. * On Linux, a new tunable, glibc.malloc.hugetlb, can be used to either make malloc issue madvise plus MADV_HUGEPAGE on mmap and sbrk or to use huge pages directly with mmap calls with the MAP_HUGETLB flags). The former can improve performance when Transparent Huge Pages is set to 'madvise' mode while the latter uses the system reserved huge pages. * The printf family of functions now handles the flagged %#m conversion specifier, printing errno as an error constant (similar to strerrorname_np). * The function _dl_find_object has been added. In-process unwinders can use it to efficiently locate unwinding information for a code address. * Support for OpenRISC running on Linux has been added. This port requires as least binutils 2.35, GCC 11, and Linux 5.4. Currently only soft-float ABI is supported: - or1k-linux-gnu The OpenRISC ABI is 32-bit big-endian and uses 64-bit time (y2038 safe) and 64-bit file offsets (LFS default). * A new configure option, --with-rtld-early-cflags, can be used to specify additional compiler flags for building the early startup code of the dynamic linker. On targets which have CPU compatibility checks, this can help to ensure that proper diagnostics are printed if the dynamic loader runs on an incompatible CPU. * On Linux, the epoll_pwait2 function has been added. It is similar to epoll_wait with the difference the timeout has nanoseconds resolution. * The function posix_spawn_file_actions_addtcsetpgrp_np has been added, enabling posix_spawn and posix_spawnp to set the controlling terminal in the new process in a race free manner. This function is a GNU extension. * Source fortification (_FORTIFY_SOURCE) level 3 is now available for applications compiling with glibc and gcc 12 and later. Level 3 leverages the __builtin_dynamic_object_size function to deliver additional fortification balanced against additional runtime cost (checking non-constant bounds). * The audit libraries will avoid unnecessary slowdown if it is not required PLT tracking (by not implementing the la_pltenter or la_pltexit callbacks). Deprecated and removed features, and other changes affecting compatibility: * On x86-64, the LD_PREFER_MAP_32BIT_EXEC environment variable support has been removed since the first PT_LOAD segment is no longer executable due to defaulting to -z separate-code. * The r_version update in the debugger interface makes the glibc binary incompatible with GDB binaries built without the following commits: c0154a4a21a gdb: Don't assume r_ldsomap when r_version > 1 on Linux 4eb629d50d4 gdbserver: Check r_version < 1 for Linux debugger interface when audit modules or dlmopen are used. * Intel MPX support (lazy PLT, ld.so profile, and LD_AUDIT) has been removed. * The --enable-static-pie option is no longer available. The glibc build configuration script now automatically detects static-pie support in the toolchain and architecture and enables it if available. * The catchsegv script and associated libSegFault.so shared object have been removed. There are widely-deployed out-of-process alternatives for catching coredumps and backtraces. * Support for prelink will be removed in the next release; this includes removal of the LD_TRACE_PRELINKING, and LD_USE_LOAD_BIAS, environment variables and their functionality in the dynamic loader. * The LD_TRACE_PRELINKING environment variable has been removed. Similar functionality to obtain the program mapping address can be achieved by using LD_TRACE_LOADED_OBJECTS to value of 2. * The LD_USE_LOAD_BIAS has been removed. The variable was mainly used to support prelink PIE binaries. Changes to build and runtime requirements: * The audit module interface version LAV_CURRENT is increased to enable proper bind-now support. The loader now advertises via the la_symbind flags that PLT trace is not possible. New audit modules require the new dynamic loader supporing the latest LAV_CURRENT version. Old audit modules are still loaded for all targets except aarch64. * The audit interface on aarch64 is extended to support both the indirect result location register (x8) and NEON Q register. Old audit modules are rejected by the loader. Audit modules must be rebuilt to use the newer structure sizes and the latest module interface version for LAV_CURRENT. Security related changes: CVE-2022-23219: Passing an overlong file name to the clnt_create legacy function could result in a stack-based buffer overflow when using the "unix" protocol. Reported by Martin Sebor. CVE-2022-23218: Passing an overlong file name to the svcunix_create legacy function could result in a stack-based buffer overflow. CVE-2021-3998: Passing a path longer than PATH_MAX to the realpath function could result in a memory leak and potential access of uninitialized memory. Reported by Qualys. CVE-2021-3999: Passing a buffer of size exactly 1 byte to the getcwd function may result in an off-by-one buffer underflow and overflow when the current working directory is longer than PATH_MAX and also corresponds to the / directory through an unprivileged mount namespace. Reported by Qualys. The following bugs are resolved with this release: [12889] nptl: Race condition in pthread_kill [14232] nptl: tst-cancel7 and tst-cancelx7 race condition [14913] libc: [mips] Clean up MIPS 64-bit register-dump.h output [15310] dynamic-link: _dl_sort_fini is O(n^3) causing slow exit when many dsos [15333] libc: Use 64-bit stat functions in installed programs [15533] dynamic-link: LD_AUDIT introduces an avoidable performance degradation [15971] dynamic-link: No interface for debugger access to libraries loaded with dlmopen [17318] locale: [RFE] Provide a C.UTF-8 locale by default [17645] dynamic-link: RFE: Improve performance of dynamic loader for deeply nested DSO dependencies. [19193] nptl: pthread_kill, pthread_cancel return ESRCH for a thread ID whose lifetime has not ended [22542] network: buffer overflow in sunrpc clnt_create (CVE-2022-23219) [22716] malloc: [PATCH] mtrace.pl: use TRACE_PRELINKING instead of TRACE_LOADED_OBJECTS [25947] malloc: memory leak in muntrace [26045] math: fmaxf(inf, nan) does not always work [26108] math: exp10() has problems with [26779] build: benign use after realloc at localealias.c:329 [27609] dynamic-link: [2.32/2.33/2.34 Regression] In elf/dl-open.c (_dl_open) we might use __LM_ID_CALLER to index GL(dl_ns)[] [27945] build: build-many-glibcs.py doesn't configure GCC with --enable-initfini-array [27991] build: x86: sysdeps/x86/configure.ac breaks when libc_cv_include_x86_isa_level is loaded from cache [28036] nptl: Incorrect types for pthread_mutexattr_set/getrobust_np in __REDIRECT_NTH macro [28061] dynamic-link: A failing dlmopen called by an auditor crashed [28062] dynamic-link: Suppress audit calls when a (new) namespace is empty [28126] libc: nftw aborts for paths longer than PATH_MAX [28129] dynamic-link: Unnecessary check DT_DEBUG in ld.so [28153] libc: [test] gmon/tst-gmon-gprof* may have a f3 line when built with ld.lld [28182] libc: _TIME_BITS=64 in C++ has issues with fcntl, ioctl, prctl [28185] math: Inaccurate j0f function (again) [28199] locale: iconvconfig prefix flag behaves differently in glibc 2.34 [28203] dynamic-link: aarch64: elf_machine_{load_address,dynamic} should drop _GLOBAL_OFFSET_TABLE_[0] in favor of __ehdr_start for robustness [28213] librt: NULL pointer dereference in mq_notify (CVE-2021-38604) [28223] libc: mips: clone does not align stack [28253] dynamic-link: Missing colon in LD_SHOW_AUXV output after AT_MINSIGSTKSZ [28256] malloc: Conditional jump or move depends on uninitialised value(s) in __GI___tunables_init [28260] build: io/tst-closefrom, misc/tst-close_range, posix/tst- spawn5 fail if stray fds are open [28310] libc: Do not use affinity mask for sysconf (_SC_NPROCESSORS_CONF) [28338] time: undefined behavior in __tzfile_compute with oddball TZif file [28340] dynamic-link: ld.so crashes while loading a DSO with a read- only dynamic section [28349] libc: Segfault for ping -R on qemux86 caused by recvmsg() [28350] libc: ping receives SIGABRT on lib32-qemux86-64 caused by recvmsg() [28353] network: Race condition on __opensock [28357] dynamic-link: deadlock between pthread_create and ctors [28358] math: f64xdivf128 and f64xmulf128 spurious underflows [28361] nptl: Fix for bug 12889 causes setxid deadlock [28368] build: -Waddress instances in stdio-common/vfprintf-internal.c [28390] localedata: Update locale data to Unicode 14.0.0 [28397] math: tgmath.h should not define fmaxmag, fminmag macros for C2X [28400] libc: [2.35 Regression] string/test-strncasecmp: cannot set locale "en_US.UTF-8" [28407] nptl: pthread_kill assumes that kill (getpid ()) is equivalent to tgkill (getpid (), gettid()) [28455] dynamic-link: -Wl,--enable-new-dtags doesn't work [28457] dynamic-link: Missing reldepmod4.so dependency for globalmod1.so [28469] time: linux: struct timex is not correctly set for 32-bit systems with TIMESIZE=64 [28470] regex: Buffer read overrun in regular expression searching [28475] string: Incorrect access attribute on memfrob [28524] libc: Conversion from ISO-2022-JP-3 with iconv may emit spurious NUL character on state reset [28532] libc: powerpc64[le]: CFI for assembly templated syscalls is incorrect [28550] dynamic-link: FAIL: tst-dso- ordering9_112-ecbda(GLIBC_TUNABLES=glibc.rtld.dynamic_sort=1) execution test [28554] build: Undefined generate-md5 [28572] libc: Misaligned accesses in test-memcpy and test-mempcpy on hppa [28607] nptl: Masked signals are delivered on thread exit [28624] libc: openjdk 8/9 assume uni processor and gets stuck due to lack of cpu counting /proc fallback with glibc 2.34 [28646] string: [2.35 Regression] mock -r fedora-36-x86_64 /tmp/java-1.8.0-openjdk-1.8.0.312.b07-2.fc36.src.rpm& fails to build [28648] dynamic-link: Running ld.so on statically linked binaries crashes [28656] dynamic-link: LD_PREFER_MAP_32BIT_EXEC no longer works due to binutils changes [28676] dynamic-link: p_align on PT_LOAD segment in DSO isn't honored [28678] nptl: nptl/tst-create1 hangs sporadically [28688] dynamic-link: PT_LOAD p_align check is too strict [28700] nss: "dns [!UNAVAIL=return] files" default for hosts database is not useful [28707] time: assert in tzfile.c __tzfile_read striking with truncated timezones generated by tzcode-2021d and later [28713] math: GCC 12 miscompiles libm [28732] dynamic-link: FAIL: elf/tst-dl_find_object [28738] build: LIBC_LINKER_FEATURE doesn't work on linker -z option [28745] dynamic-link: _dl_find_object miscompilation on powerpc64le [28746] libc: _FORTIFY_SOURCE does not work for stpcpy [28749] libc: Inconsistency detected by ld.so: rtld.c: 1632: dl_main: Assertion `GL(dl_rtld_map).l_libname' failed! [28755] string: overflow bug in wcsncmp_avx2 and wcsncmp_evex [28757] nptl: GDB printer tests failed with new GDB [28765] math: x86_64 libmvec atan2 accuracy [28766] manual: Document libmvec accuracy [28768] network: Buffer overflow in svcunix_create with long pathnames (CVE-2022-23218) [28769] libc: Off-by-one buffer overflow/underflow in getcwd() (CVE-2021-3999) [28770] libc: Unexpected return value from realpath() for too long results (CVE-2021-3998) [28771] libc: %ebx optimization macros are incompatible with .altmacro in Systemtap probes [28780] build: --disable-default-pie doesn't work on static programs [28782] libc: x86-64 ISA level for glibc itself is always x86-64-baseline [28792] glob: possible wrong behaviour with patterns with double [ with no closing ] [28837] libc: FAIL: socket/tst-socket-timestamp-compat [28847] locale: Empty mon_decimal_point in LC_MONETARY results in non- empty mon_decimal_point_wc Version 2.34 Major new features: * In order to support smoother in-place-upgrades and to simplify the implementation of the runtime all functionality formerly implemented in the libraries libpthread, libdl, libutil, libanl has been integrated into libc. New applications do not need to link with -lpthread, -ldl, -lutil, -lanl anymore. For backwards compatibility, empty static archives libpthread.a, libdl.a, libutil.a, libanl.a are provided, so that the linker options keep working. Applications which have been linked against glibc 2.33 or earlier continue to load the corresponding shared objects (which are now empty). The integration of those libraries into libc means that additional symbols become available by default. This can cause applications that contain weak references to take unexpected code paths that would only have been used in previous glibc versions when e.g. preloading libpthread.so.0, potentially exposing application bugs. * When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined, PTHREAD_STACK_MIN is no longer constant and is redefined to sysconf(_SC_THREAD_STACK_MIN). This supports dynamic sized register sets for modern architectural features like Arm SVE. * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _DYNAMIC_STACK_SIZE_SOURCE or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ) and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ). This supports dynamic sized register sets for modern architectural features like Arm SVE. * The dynamic linker implements the --list-diagnostics option, printing a dump of information related to IFUNC resolver operation and glibc-hwcaps subdirectory selection. * On Linux, the function execveat has been added. It operates similar to execve and it is is already used to implement fexecve without requiring /proc to be mounted. However, different than fexecve, if the syscall is not supported by the kernel an error is returned instead of trying a fallback. * The ISO C2X function timespec_getres has been added. * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO C2X, is supported to enable declarations of functions defined in Annex F of C2X. Those declarations are also enabled when __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is defined, and when _GNU_SOURCE is defined. * On powerpc64*, glibc can now be compiled without scv support using the --disable-scv configure option. * Add support for 64-bit time_t on configurations like x86 where time_t is traditionally 32-bit. Although time_t still defaults to 32-bit on these configurations, this default may change in future versions. This is enabled with the _TIME_BITS preprocessor macro set to 64 and is only supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is only enabled for Linux and the full support requires a minimum kernel version of 5.1. * The main gconv-modules file in glibc now contains only a small set of essential converter modules and the rest have been moved into a supplementary configuration file gconv-modules-extra.conf in the gconv-modules.d directory in the same GCONV_PATH. Similarly, external converter modules directories may have supplementary configuration files in a gconv-modules.d directory with names ending with .conf to logically classify the converter modules in that directory. * On Linux, a new tunable, glibc.pthread.stack_cache_size, can be used to configure the size of the thread stack cache. * The function _Fork has been added as an async-signal-safe fork replacement since Austin Group issue 62 droped the async-signal-safe requirement for fork (and it will be included in the future POSIX standard). The new _Fork function does not run any atfork function neither resets any internal state or lock (such as the malloc one), and only sets up a minimal state required to call async-signal-safe functions (such as raise or execve). This function is currently a GNU extension. * On Linux, the close_range function has been added. It allows efficiently closing a range of file descriptors on recent kernels (version 5.9). * The function closefrom has been added. It closes all file descriptors greater than or equal to a given integer. This function is a GNU extension, although it is also present in other systems. * The posix_spawn_file_actions_addclosefrom_np function has been added, enabling posix_spawn and posix_spawnp to close all file descriptors greater than or equal to a given integer. This function is a GNU extension, although Solaris also provides a similar function. * When invoked explicitly, the dynamic linker now uses the kernel to execute programs that do not have any dynamic dependency (that is, they are statically linked). This feature is Linux-specific. Deprecated and removed features, and other changes affecting compatibility: * The function pthread_mutex_consistent_np has been deprecated; programs should use the equivalent standard function pthread_mutex_consistent instead. * The function pthread_mutexattr_getrobust_np has been deprecated; programs should use the equivalent standard function pthread_mutexattr_getrobust instead. * The function pthread_mutexattr_setrobust_np has been deprecated; programs should use the equivalent standard function pthread_mutexattr_setrobust instead. * The function pthread_yield has been deprecated; programs should use the equivalent standard function sched_yield instead. * The function inet_neta declared in has been deprecated. * Various rarely-used functions declared in and have been deprecated. Applications are encouraged to use dedicated DNS processing libraries if applicable. For , this affects the functions dn_count_labels, fp_nquery, fp_query, fp_resstat, hostalias, loc_aton, loc_ntoa, p_cdname, p_cdnname, p_class, p_fqname, p_fqnname, p_option, p_query, p_rcode, p_time, p_type, putlong, putshort, res_hostalias, res_isourserver, res_nameinquery, res_queriesmatch, res_randomid, sym_ntop, sym_ntos, sym_ston. For , the functions ns_datetosecs, ns_format_ttl, ns_makecanon, ns_parse_ttl, ns_samedomain, ns_samename, ns_sprintrr, ns_sprintrrf, ns_subdomain have been deprecated. * Various symbols previously defined in libresolv have been moved to libc in order to prepare for libresolv moving entirely into libc (see earlier entry for merging libraries into libc). The symbols __dn_comp, __dn_expand, __dn_skipname, __res_dnok, __res_hnok, __res_mailok, __res_mkquery, __res_nmkquery, __res_nquery, __res_nquerydomain, __res_nsearch, __res_nsend, __res_ownok, __res_query, __res_querydomain, __res_search, __res_send formerly in libresolv have been renamed and no longer have a __ prefix. They are now available in libc. * The pthread cancellation handler is now installed with SA_RESTART and pthread_cancel will always send the internal SIGCANCEL on a cancellation request. It should not be visible to applications since the cancellation handler should either act upon cancellation (if asynchronous cancellation is enabled) or ignore the cancellation internal signal. However there are buggy kernel interfaces (for instance some CIFS versions) that could still see a spurious EINTR error when cancellation interrupts a blocking syscall. * Previously, glibc installed its various shared objects under versioned file names such as libc-2.33.so. The ABI sonames (e.g., libc.so.6) were provided as symbolic links. Starting with glibc 2.34, the shared objects are installed under their ABI sonames directly, without symbolic links. This increases compatibility with distribution package managers that delete removed files late during the package upgrade or downgrade process. * The symbols mallwatch and tr_break are now deprecated and no longer used in mtrace. Similar functionality can be achieved by using conditional breakpoints within mtrace functions from within gdb. * The __morecore and __after_morecore_hook malloc hooks and the default implementation __default_morecore have been removed from the API. Existing applications will continue to link against these symbols but the interfaces no longer have any effect on malloc. * Debugging features in malloc such as the MALLOC_CHECK_ environment variable (or the glibc.malloc.check tunable), mtrace() and mcheck() have now been disabled by default in the main C library. Users looking to use these features now need to preload a new debugging DSO libc_malloc_debug.so to get this functionality back. * The deprecated functions malloc_get_state and malloc_set_state have been moved from the core C library into libc_malloc_debug.so. Legacy applications that still use these functions will now need to preload libc_malloc_debug.so in their environment using the LD_PRELOAD environment variable. * The deprecated memory allocation hooks __malloc_hook, __realloc_hook, __memalign_hook and __free_hook are now removed from the API. Compatibility symbols are present to support legacy programs but new applications can no longer link to these symbols. These hooks no longer have any effect on glibc functionality. The malloc debugging DSO libc_malloc_debug.so currently supports hooks and can be preloaded to get this functionality back for older programs. However this is a transitional measure and may be removed in a future release of the GNU C Library. Users may port away from these hooks by writing and preloading their own malloc interposition library. Changes to build and runtime requirements: * On Linux, the shm_open, sem_open, and related functions now expect the file shared memory file system to be mounted at /dev/shm. These functions no longer search among the system's mount points for a suitable replacement if /dev/shm is not available. Security related changes: CVE-2021-27645: The nameserver caching daemon (nscd), when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. Reported by Chris Schanzle. CVE-2021-33574: The mq_notify function has a potential use-after-free issue when using a notification type of SIGEV_THREAD and a thread attribute with a non-default affinity mask. CVE-2021-35942: The wordexp function may overflow the positional parameter number when processing the expansion resulting in a crash. Reported by Philippe Antoine. The following bugs are resolved with this release: [4737] libc: fork is not async-signal-safe [5781] math: Slow dbl-64 sin/cos/sincos for special values [10353] libc: Methods for deleting all file descriptors greater than given integer (closefrom) [14185] glob: fnmatch() fails when '*' wildcard is applied on the file name containing multi-byte character(s) [14469] math: Inaccurate j0f function [14470] math: Inaccurate j1f function [14471] math: Inaccurate y0f function [14472] math: Inaccurate y1f function [14744] nptl: kill -32 $pid or kill -33 $pid on a process cancels a random thread [15271] dynamic-link: dlmopen()ed shared library with LM_ID_NEWLM crashes if it fails dlsym() twice [15648] nptl: multiple definition of `__lll_lock_wait_private' [16063] nptl: Provide a pthread_once variant in libc directly [17144] libc: syslog is not thread-safe if NO_SIGPIPE is not defined [17145] libc: syslog with LOG_CONS leaks console file descriptor [17183] manual: description of ENTRY struct in in glibc manual is incorrect [18435] nptl: pthread_once hangs when init routine throws an exception [18524] nptl: Missing calloc error checking in __cxa_thread_atexit_impl [19329] dynamic-link: dl-tls.c assert failure at concurrent pthread_create and dlopen [19366] nptl: returning from a thread should disable cancellation [19511] nptl: 8MB memory leak in pthread_create in case of failure when non-root user changes priority [20802] dynamic-link: getauxval NULL pointer dereference after static dlopen [20813] nptl: pthread_exit is inconsistent between libc and libpthread [22057] malloc: malloc_usable_size is broken with mcheck [22668] locale: LC_COLLATE: the last character of ellipsis is not ordered correctly [23323] libc: [RFE] CSU startup hardening. [23328] malloc: Remove malloc hooks and ensure related APIs return no data. [23462] dynamic-link: Static binary with dynamic string tokens ($LIB, $PLATFORM, $ORIGIN) crashes [23489] libc: "gcc -lmcheck" aborts on free when using posix_memalign [23554] nptl: pthread_getattr_np reports wrong stack size with MULTI_PAGE_ALIASING [24106] libc: Bash interpreter in ldd script is taken from host [24773] dynamic-link: dlerror in an secondary namespace does not use the right free implementation [25036] localedata: Update collation order for Swedish [25383] libc: where_is_shmfs/__shm_directory/SHM_GET_NAME may cause shm_open to pick wrong directory [25680] dynamic-link: ifuncmain9picstatic and ifuncmain9picstatic crash in IFUNC resolver due to stack canary (--enable-stack- protector=all) [26874] build: -Warray-bounds in _IO_wdefault_doallocate [26983] math: [x86_64] x86_64 tgamma has too large ULP error [27111] dynamic-link: pthread_create and tls access use link_map objects that may be concurrently freed by dlclose [27132] malloc: memusagestat is linked to system librt, leading to undefined symbols on major version upgrade [27136] dynamic-link: dtv setup at thread creation may leave an entry uninitialized [27249] libc: libSegFault.so does not output signal number properly [27304] nptl: pthread_cond_destroy does not pass private flag to futex system calls [27318] dynamic-link: glibc fails to load binaries when built with -march=sandybridge: CPU ISA level is lower than required [27343] nss: initgroups() SIGSEGVs when called on a system without nsswich.conf (in a chroot) [27346] dynamic-link: x86: PTWRITE feature check is missing [27389] network: NSS chroot hardening causes regressions in chroot deployments [27403] dynamic-link: aarch64: tlsdesc htab is not freed on dlclose [27444] libc: sysconf reports unsupported option (-1) for _SC_LEVEL1_ICACHE_LINESIZE on X86 since v2.33 [27462] nscd: double-free in nscd (CVE-2021-27645) [27468] malloc: aarch64: realloc crash with heap tagging: FAIL: malloc/tst-malloc-thread-fail [27498] dynamic-link: __dl_iterate_phdr lacks unwinding information [27511] libc: S390 memmove assumes Vector Facility when MIE Facility 3 is present [27522] glob: glob, glob64 incorrectly marked as __THROW [27555] dynamic-link: Static tests fail with --enable-stack- protector=all [27559] libc: fstat(AT_FDCWD) succeeds (it shouldn't) and returns information for the current directory [27577] dynamic-link: elf/ld.so --help doesn't work [27605] libc: tunables can't control xsave/xsavec selection in dl_runtime_resolve_* [27623] libc: powerpc: Missing registers in sc[v] clobbers list [27645] libc: [linux] sysconf(_SC_NPROCESSOR...) breaks down on containers [27646] dynamic-link: Linker error for non-existing NSS symbols (e.g. _nss_files_getcanonname_r) from within a dlmopen namespace. [27648] libc: FAIL: misc/tst-select [27650] stdio: vfscanf returns too early if a match is longer than INT_MAX [27651] libc: Performance regression after updating to 2.33 [27655] string: Wrong size calculation in string/test-strnlen.c [27706] libc: select fails to update timeout on error [27709] libc: arm: FAIL: debug/tst-longjmp_chk2 [27721] dynamic-link: x86: ld_audit ignores bind now for TLSDESC and tries resolving them lazily [27744] nptl: Support different libpthread/ld.so load orders in libthread_db [27749] libc: Data race __run_exit_handlers [27761] libc: getconf: Segmentation fault when passing '-vq' as argument [27832] nss: makedb.c:797:7: error: 'writev' specified size 4294967295 exceeds maximum object size 2147483647 [27870] malloc: MALLOC_CHECK_ causes realloc(valid_ptr, TOO_LARGE) to not set ENOMEM [27872] build: Obsolete configure option --enable-stackguard- randomization [27873] build: tst-cpu-features-cpuinfo fail when building on AMD cpu [27882] localedata: Use U+00AF MACRON in more EBCDIC charsets [27892] libc: powerpc: scv ABI error handling fails to check IS_ERR_VALUE [27896] nptl: mq_notify does not handle separately allocated thread attributes (CVE-2021-33574) [27901] libc: TEST_STACK_ALIGN doesn't work [27902] libc: The x86-64 clone wrapper fails to align child stack [27914] nptl: Install SIGSETXID handler with SA_ONSTACK [27939] libc: aarch64: clone does not align the stack [27968] libc: s390x: clone does not align the stack [28011] libc: Wild read in wordexp (parse_param) (CVE-2021-35942) [28024] string: s390(31bit): Wrong result of memchr (MEMCHR_Z900_G5) with n >= 0x80000000 [28028] malloc: malloc: tcache shutdown sequence does not work if the thread never allocated anything [28033] libc: Need to check RTM_ALWAYS_ABORT for RTM [28064] string: x86_64:wcslen implementation list has wcsnlen [28067] libc: FAIL: posix/tst-spawn5 [28068] malloc: FAIL: malloc/tst-mallocalign1-mcheck [28071] time: clock_gettime, gettimeofday, time lost vDSO acceleration on older kernels [28075] nis: Out-of-bounds static buffer read in nis_local_domain [28089] build: tst-tls20 fails when linker defaults to --as-needed [28090] build: elf/tst-cpu-features-cpuinfo-static fails on certain AMD64 cpus [28091] network: ns_name_skip may return 0 for domain names without terminator Version 2.33 Major new features: * The dynamic linker accepts the --list-tunables argument which prints all the supported tunables. This option is disable if glibc is configured with tunables disabled (--enable-tunables=no). * The dynamic linker accepts the --argv0 argument and provides opportunity to change argv[0] string. * The dynamic linker loads optimized implementations of shared objects from subdirectories under the glibc-hwcaps directory on the library search path if the system's capabilities meet the requirements for that subdirectory. Initially supported subdirectories include "power9" and "power10" for the powerpc64le-linux-gnu architecture, "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3", "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the subdirectory names correspond to the vendor-independent x86-64 microarchitecture levels defined in the x86-64 psABI supplement. * The new --help option of the dynamic linker provides usage and information and library search path diagnostics. * The mallinfo2 function is added to report statistics as per mallinfo, but with larger field widths to accurately report values that are larger than fit in an integer. * Add to provide query macros for x86 CPU features. * Support for the RISC-V ISA running on Linux has been expanded to run on 32-bit hardware. This is supported for the following ISA and ABI pairs: - rv32imac ilp32 - rv32imafdc ilp32 - rv32imafdc ilp32d The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils 2.28. * A new fortification level _FORTIFY_SOURCE=3 is available. At this level, glibc may use additional checks that may have an additional performance overhead. At present these checks are available only on LLVM 9 and later. The latest GCC available at this time (10.2) does not support this level of fortification. Deprecated and removed features, and other changes affecting compatibility: * The mallinfo function is marked deprecated. Callers should call mallinfo2 instead. * When dlopen is used in statically linked programs, alternative library implementations from HWCAP subdirectories are no longer loaded. Instead, the default implementation is used. * The deprecated header and the function vtimes have been removed. To support old binaries, the vtimes function continues to exist as a compatibility symbol. Applications should use the getrlimit or prlimit. * Following a change in the tzdata 2018a release upstream, the zdump program is now installed in the /usr/bin subdirectory. Previously, the /usr/sbin subdirectory was used. * On s390(x), the type float_t is now derived from the macro __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being hardcoded to double. This does not affect the ABI of any libraries that are part of the GNU C Library, but may affect the ABI of other libraries that use this type in their interfaces. The new definition improves consistency with compiler behavior in many scenarios. * A future version of glibc will stop loading shared objects from the "tls" subdirectories on the library search path, the subdirectory that corresponds to the AT_PLATFORM system name, and also stop employing the legacy AT_HWCAP search mechanism. Applications should switch to the new glibc-hwcaps mechanism instead; if they do not do that, only the baseline version (directly from the search path directory) will be loaded. Changes to build and runtime requirements: * On Linux, the system administrator needs to configure /dev/pts with the intended access modes for pseudo-terminals. glibc no longer attemps to adjust permissions of terminal devices. The previous glibc defaults ("tty" group, user read/write and group write) already corresponded to what most systems used, so that grantpt did not perform any adjustments. * On Linux, the posix_openpt and getpt functions no longer attempt to use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists (and pseudo-terminals are supported), a devpts file system is mounted on /dev/pts. Current systems already meet these requirements. * s390x requires GCC 7.1 or newer. See gcc Bug 98269. Security related changes: CVE-2021-3326: An assertion failure during conversion from the ISO-20220-JP-3 character set using the iconv function has been fixed. This assertion was triggered by certain valid inputs in which the converted output contains a combined sequence of two wide characters crossing a buffer boundary. Reported by Tavis Ormandy. CVE-2020-27618: An infinite loop has been fixed in the iconv program when invoked with input containing redundant shift sequences in the IBM1364, IBM1371, IBM1388, IBM1390, or IBM1399 character sets. CVE-2020-29562: An assertion failure has been fixed in the iconv function when invoked with UCS4 input containing an invalid character. CVE-2019-25013: A buffer overflow has been fixed in the iconv function when invoked with EUC-KR input containing invalid multibyte input sequences. The following bugs are resolved with this release: [10635] libc: realpath portability patches [16124] dynamic-link: ld.so should allow to change argv[0] [17924] malloc: 'free' should not set errno [18683] libc: Linux faccessat implementation can incorrectly ignore AT_EACCESS [22899] libc: Use 64-bit readdir() in generic POSIX getcwd() [23091] hurd: missing waitid support [23249] libc: Epyc and other current AMD CPUs do not select the "haswell" platform subdirectory [24080] dynamic-link: Definition of "haswell" platform is inconsistent with GCC [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable- stack-protector=all [24941] libc: Make grantpt usable after multi-threaded fork in more cases [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway [24973] locale: iconv encounters segmentation fault when converting 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013) [25399] string: undefined reference to `__warn_memset_zero_len' when changing gnuc version [25859] libc: glibc parser for /sys/devices/system/cpu/online is incorrect [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask bits [25971] libc: s390 bits/hwcap.h out of sync with kernel [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors [26100] libc: Race in syslog(3) with regards to tag printing. [26124] libc: Export [26130] nscd: Inconsistent nscd cache during pruning [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized [26224] locale: iconv hangs when converting some invalid inputs from several IBM character sets (CVE-2020-27618) [26341] libc: realpath cyclically call __alloca(path_max) to consume too much stack space [26343] manual: invalid documented return type for strerrorname_np(), strerrordesc_np(), sigdescr_np(), sigabbrev_np() [26376] libc: Namespace violation in stdio.h and sys/stat.h if build with optimization. [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT anymore [26394] time: [2.33 Regression] FAIL: nptl/tst-join14 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on non-FMA4 system [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative [26553] libc: mtx_init allows type set to "mtx_recursive" only [26555] string: strerrorname_np does not return the documented value [26592] libc: pointer arithmetic overflows in realpath [26600] network: Transaction ID collisions cause slow DNS lookups in getaddrinfo [26606] libc: [2.33 Regression] pselect is broken on x32 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc [26620] glob: fnmatch with collating symbols results in segmentation fault [26625] libc: [2.33 Regression] CET is disabled [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is at the end of a memory mapping [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified by the caller to the kernel [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage [26647] build: [-Werror=array-parameter=] due to different declarations for __sigsetjmp [26648] libc: mkstemp is likely to fail on systems with non-stricly- monotonic clocks [26649] stdio: printf should handle non-normal x86 long double numbers gracefully (CVE-2020-29573) [26686] build: -Warray-parameter instances building with GCC 11 [26687] build: -Warray-bounds instances building with GCC 11 [26690] stdio: Aliasing violation in __vfscanf_internal [26691] nptl: Use a minimum guard size of 64 KiB on aarch64 [26726] build: GCC warning calling new_composite_name with an array of one element [26736] libc: FAIL: misc/tst-sysvshm-linux [26737] libc: Random FAIL: rt/tst-shm [26791] libc: Missing O_CLOEXEC in sysconf.c [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly lazy bound [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on PI mutexes [26818] string: aarch64: string tests may run ifunc variants that are not safe [26821] libc: Memory leak test failures on Fedora 33 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk: FSGSBASE/LM/RDRAND check failure [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit platform [26853] libc: aarch64: Missing unwind information in statically linked startup code [26923] locale: Assertion failure in iconv when converting invalid UCS4 (CVE-2020-29562) [26926] dynamic-link: aarch64: library dependencies are not bti protected [26932] libc: sh: Multiple floating point functions defined as stubs only since 2.31 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is locked [26988] dynamic-link: aarch64: BTI mprotect address is not page aligned [27002] build: libc_freeres_fn build failure with GCC 11 [27004] dynamic-link: ld.so is miscompiled by GCC 11 [27008] dynamic-link: ld.so.cache should have endianness markup [27042] libc: [alpha] anonymous union in struct stat confuses detection logic [27053] libc: Conformance regression in system(3) (and probably also pclose(3)) [27072] dynamic-link: static pie ifunc resolvers run before hwcap is setup [27077] network: Do not reload /etc/nsswitch.conf from chroot [27083] libc: Unsafe unbounded alloca in addmntent [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not work [27130] string: "rep movsb" performance issue [27150] libc: alpha: wait4() is unavailable in static linking [27177] dynamic-link: GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't work [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module related to combining characters (CVE-2021-3326) Version 2.32 Major new features: * Unicode 13.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 13.0.0, using generator scripts contributed by Mike FABIAN (Red Hat). * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq) * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1. Three ABIs are supported: - arc-linux-gnu - arc-linux-gnuhf - arceb-linux-gnu The arc* ABIs are little-endian while arceb is big-endian. All ABIs use 64-bit time (y2038 safe) and 64-bit file offsets (LFS default). * The GNU C Library now loads audit modules listed in the DT_AUDIT and DT_DEPAUDIT dynamic section entries of the main executable. * powerpc64le supports IEEE128 long double libm/libc redirects when using -mabi=ieeelongdouble to compile C code on supported GCC toolchains. It is recommended to use GCC 8 or newer when testing this option. * To help detect buffer overflows and other out-of-bounds accesses several APIs have been annotated with GCC 'access' attribute. This should help GCC 10 issue better warnings. * On Linux, functions pthread_attr_setsigmask_np and pthread_attr_getsigmask_np have been added. They allow applications to specify the signal mask of a thread created with pthread_create. * The GNU C Library now provides the header file which declares the variable __libc_single_threaded. Applications are encouraged to use this variable for single-thread optimizations, instead of weak references to symbols historically defined in libpthread. * The functions sigabbrev_np and sigdescr_np have been added. The sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for SIGHUP) while sigdescr_np returns a string describing the signal number (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not attempt to translate the return description, both functions return NULL for an invalid signal number. They should be used instead of sys_siglist or sys_sigabbrev and they are both thread and async-signal safe. These functions are GNU extensions. * The functions strerrorname_np and strerrordesc_np have been added. The strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL) while strerrordesc_np returns a string describing the error number (e.g "Invalid argument" for EINVAL). Different than strerror, strerrordesc_np does not attempt to translate the return description, both functions return NULL for an invalid error number. They should be used instead of sys_errlist and sys_nerr, both are thread and async-signal safe. These functions are GNU extensions. * AArch64 now supports standard branch protection security hardening in glibc when it is built with a GCC that is configured with --enable-standard-branch-protection (or if -mbranch-protection=standard flag is passed when building both GCC target libraries and glibc, in either case a custom GCC is needed). This includes branch target identification (BTI) and pointer authentication for return addresses (PAC-RET). They require armv8.5-a and armv8.3-a architecture extensions respectively for the protection to be effective, otherwise the used instructions are nops. User code can use PAC-RET without libc support, but BTI requires a libc that is built with BTI support, otherwise runtime objects linked into user code will not be BTI compatible. Deprecated and removed features, and other changes affecting compatibility: * Remove configure option --enable-obsolete-rpc. Sun RPC is removed from glibc. This includes the rpcgen program, librpcsvc, and the Sun RPC header files. Backward compatibility for old programs is kept only for architectures and ABIs that have been added in or before glibc 2.31. New programs need to use TI-RPC and rpcsvc-proto . * Remove configure option --enable-obsolete-nsl. libnsl is only built as shared library for backward compatibility and the NSS modules "nis" and "nisplus" are not built at all and libnsl's headers aren't installed. This compatibility is kept only for architectures and ABIs that have been added in or before version 2.28. Replacement implementations based on TI-RPC, which additionally support IPv6, are available from . This change does not affect the "compat" NSS module, which does not depend on libnsl since 2.27 and thus can be used without NIS. * The deprecated header and the sysctl function have been removed. To support old binaries, the sysctl function continues to exist as a compatibility symbol (on those architectures which had it), but always fails with ENOSYS. This reflects the removal of the system call from all architectures, starting with Linux 5.5. * The sstk function is no longer available to newly linked binaries. Its implementation always returned with a failure, and the function was not declared in any header file. * The legacy signal handling functions siginterrupt, sigpause, sighold, sigrelse, sigignore and sigset, and the sigmask macro have been deprecated. Applications should use the sigsuspend, sigprocmask and sigaction functions instead. * ldconfig now defaults to the new format for ld.so.cache. glibc has already supported this format for almost 20 years. * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev are no longer available to newly linked binaries, and their declarations have been removed from . They are exported solely as compatibility symbols to support old binaries. All programs should use strsignal instead. * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr are no longer available to newly linked binaries, and their declarations have been removed from . They are exported solely as compatibility symbols to support old binaries. All programs should use strerror or strerror_r instead. * Both strerror and strerror_l now share the same internal buffer in the calling thread, meaning that the returned string pointer may be invalided or contents might be overwritten on subsequent calls in the same thread or if the thread is terminated. It makes strerror MT-safe. * Using weak references to libpthread functions such as pthread_create or pthread_key_create to detect the singled-threaded nature of a program is an obsolescent feature. Future versions of glibc will define pthread_create within libc.so.6 itself, so such checks will always flag the program as multi-threaded. Applications should check the __libc_single_threaded variable declared in instead. * The "files" NSS module no longer supports the "key" database (used for secure RPC). The contents of the /etc/publickey file will be ignored, regardless of the settings in /etc/nsswitch.conf. (This method of storing RPC keys only supported the obsolete and insecure AUTH_DES flavor of secure RPC.) * The __morecore and __after_morecore_hook malloc hooks and the default implementation __default_morecore have been deprecated. Applications should use malloc interposition to change malloc behavior, and mmap to allocate anonymous memory. A future version of glibc may require that applications which use the malloc hooks must preload a special shared object, to enable the hooks. * The hesiod NSS module has been deprecated and will be removed in a future version of glibc. System administrators are encouraged to switch to other approaches for networked account databases, such as LDAP. Changes to build and runtime requirements: * powerpc64le requires GCC 7.4 or newer. This is required for supporting long double redirects. Security related changes: CVE-2016-10228: An infinite loop has been fixed in the iconv program when invoked with the -c option and when processing invalid multi-byte input sequences. Reported by Jan Engelhardt. CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack corruption when they were passed a pseudo-zero argument. Reported by Guido Vranken / ForAllSecure Mayhem. CVE-2020-1752: A use-after-free vulnerability in the glob function when expanding ~user has been fixed. CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and memmove functions has been fixed. Discovered by Jason Royes and Samual Dytrych of the Cisco Security Assessment and Penetration Team (See TALOS-2020-1019). The following bugs are resolved with this release: [9809] localedata: ckb_IQ: new Kurdish Sorani locale [10441] manual: Backtraces code example lacks error checking [10815] librt: [timer_create / SIGEV_THREAD] signalmask of timer_sigev_thread dangerous [14231] stdio: stdio-common tests memory requirements [14578] libc: /proc-based emulation for lchmod, fchmodat [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if filtee has constructor [19519] locale: iconv(1) with -c option hangs on illegal multi-byte sequences (CVE-2016-10228) [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML character entities for infinity & pi [20338] libc: Parsing of /etc/gshadow can return bad pointers causing segfaults in applications [20543] libc: Please move from .gnu.linkonce to comdat [22489] network: gcc warns about implicit convertion in ICMP6_FILTER_SETPASS with -Wsign-conversion [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1" [23294] math: Complex _FloatN functions are redirected to the wrong function with -mlong-double-64 [23296] libc: Data race in setting function descriptor during lazy binding [23668] dynamic-link: ldconfig: Default to the new format for ld.so.cache [23819] hurd: hurd: Add C11 thread support [23990] build: test-container error out on failure to exec child. [23991] build: shell-container typo in run_command_array [24638] manual: Error in example of parsing a template string [24654] manual: Wrong declaration of wcschr in libc manual [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic linker [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for dynamically loaded dsos [25098] nptl: nptl: ctype classification functions are not AS-Safe [25219] libc: improve out-of-bounds checking with GCC 10 attribute access [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and restore EAX, ECX and EDX [25397] dynamic-link: Legacy bitmap doesn't cover jitted code [25414] glob: 'glob' use-after-free bug (CVE-2020-1752) [25420] network: Race condition in resolv_conf.c can result in caching stale configuration forever [25487] math: sinl() stack corruption from crafted input (CVE-2020-10029) [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC defaults to PIE [25523] libc: MIPS/Linux inline syscall template is miscompiled [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy() (CVE-2020-6096) [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31 on 32 bit and old kernel [25635] libc: arm: Wrong sysdep order selection for soft-fp [25639] localedata: Some names of days and months wrongly spelt in Occitan [25657] libc: sigprocmask() and sigisemptyset() manipulate different amount of sigset_t bytes [25691] stdio: printf: memory leak when printing long multibyte strings [25715] libc: system() returns wrong errors when posix_spawn fails [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion state for conversions that produce two Unicode code points [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel for linux x86_64 leads to livelock [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes test failures, invalid instruction in ld.so [25790] glob: Typo in tst-fnmatch.input [25810] libc: x32: Incorrect syscall entries with pointer, off_t and size_t [25819] localedata: Update locale data to Unicode 13.0.0 [25824] libc: Abnormal function of strnlen in aarch64 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1] [25896] libc: Incorrect prctl [25902] libc: Bad LOADARGS_N [25905] dynamic-link: VSX registers are corrupted during PLT resolution when glibc is built with --disable-multi-arch and --with- cpu=power9 [25933] string: Off by one error in __strncmp_avx2 when length=VEC_SIZE*4 and strings are at page boundaries can cause a segfault [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and exiting detached thread [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold for x32 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding ERANGE [25999] nptl: Use-after-free issue in pthread_getaddr_default_np [26073] math: getpayload() has wrong return value [26076] dynamic-link: dlmopen crashes after failing to load dependencies in audit mode [26120] localedata: column width of of some Korean JUNGSEONG/JONGSEONG characters wrong (should be 0) [26128] libc: Incorrect bit_cpu_CLFLUSHOPT [26133] libc: Incorrect need_arch_feature_F16C [26137] libc: strtod() triggers exception FE_INEXACT on reasonable input [26149] libc: PKU is usable only if OSPKE is set [26173] libc: powerpc64*: Add @notoc to calls to functions that do not preserve r2 [26208] libc: Incorrect bit_cpu_CLFSH [26210] network: Incorrect use of hidden symbols for global sunrpc variables [26211] stdio: printf integer overflow calculating allocation size [26214] stdio: printf_fp double free [26215] stdio: printf_fp memory leak [26232] time: FAIL: support/tst-timespec for 32-bit targets [26258] nss: nss_compat should not read input files with mmap [26332] string: Incorrect cache line size load causes memory corruption in memset Version 2.31 Major new features: * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to enable features from the draft ISO C2X standard. Only some features from this draft standard are supported by the GNU C Library, and as the draft is under active development, the set of features enabled by this macro is liable to change. Features from C2X are also enabled by _GNU_SOURCE, or by compiling with "gcc -std=gnu2x". * The functions that round their results to a narrower type now have corresponding type-generic macros in , as defined in TS 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of Clarification Request 13 to TS 18661-3. * The function pthread_clockjoin_np has been added, enabling join with a terminated thread with a specific clock. It allows waiting against CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension. * New locale added: mnw_MM (Mon language spoken in Myanmar). * The DNS stub resolver will optionally send the AD (authenticated data) bit in queries if the trust-ad option is set via the options directive in /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this mode, the AD bit, as provided by the name server, is available to applications which call res_search and related functions. In the default mode, the AD bit is not set in queries, and it is automatically cleared in responses, indicating a lack of DNSSEC validation. (Therefore, the name servers and the network path to them are treated as untrusted.) Deprecated and removed features, and other changes affecting compatibility: * The totalorder and totalordermag functions, and the corresponding functions for other floating-point types, now take pointer arguments to avoid signaling NaNs possibly being converted to quiet NaNs in argument passing. This is in accordance with the resolution of Clarification Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass floating-point arguments directly will continue to work. * The obsolete function stime is no longer available to newly linked binaries, and its declaration has been removed from . Programs that set the system time should use clock_settime instead. * We plan to remove the obsolete function ftime, and the header , in a future version of glibc. In this release, the header still exists but calling ftime will cause a compiler warning. All programs should use gettimeofday or clock_gettime instead. * The gettimeofday function no longer reports information about a system-wide time zone. This 4.2-BSD-era feature has been deprecated for many years, as it cannot handle the full complexity of the world's timezones, but hitherto we have supported it on a best-effort basis. Changes required to support 64-bit time_t on 32-bit architectures have made this no longer practical. As of this release, callers of gettimeofday with a non-null 'tzp' argument should expect to receive a 'struct timezone' whose tz_minuteswest and tz_dsttime fields are zero. (For efficiency reasons, this does not always happen on a few Linux-based ports. This will be corrected in a future release.) All callers should supply a null pointer for the 'tzp' argument to gettimeofday. For accurate information about the time zone associated with the current time, use the localtime function. gettimeofday itself is obsolescent according to POSIX. We have no plans to remove access to this function, but portable programs should consider using clock_gettime instead. * The settimeofday function can still be used to set a system-wide time zone when the operating system supports it. This is because the Linux kernel reused the API, on some architectures, to describe a system-wide time-zone-like offset between the software clock maintained by the kernel, and the "RTC" clock that keeps time when the system is shut down. However, to reduce the odds of this offset being set by accident, settimeofday can no longer be used to set the time and the offset simultaneously. If both of its two arguments are non-null, the call will fail (setting errno to EINVAL). Callers attempting to set this offset should also be prepared for the call to fail and set errno to ENOSYS; this already happens on the Hurd and on some Linux architectures. The Linux kernel maintainers are discussing a more principled replacement for the reused API. After a replacement becomes available, we will change settimeofday to fail with ENOSYS on all platforms when its 'tzp' argument is not a null pointer. settimeofday itself is obsolescent according to POSIX. Programs that set the system time should use clock_settime and/or the adjtime family of functions instead. We may cease to make settimeofday available to newly linked binaries after there is a replacement for Linux's time-zone-like offset API. * SPARC ISA v7 is no longer supported. v8 is still supported, but only if the optional CAS instruction is implemented (for instance, LEON processors are still supported, but SuperSPARC processors are not). As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit configurations. * If a lazy binding failure happens during dlopen, during the execution of an ELF constructor, the process is now terminated. Previously, the dynamic loader would return NULL from dlopen, with the lazy binding error captured in a dlerror message. In general, this is unsafe because resetting the stack in an arbitrary function call is not possible. * For MIPS hard-float ABIs, the GNU C Library will be configured to need an executable stack unless explicitly configured at build time to require minimum kernel version 4.8 or newer. This is because executing floating-point branches on a non-executable stack on Linux kernels prior to 4.8 can lead to application crashes for some MIPS configurations. While currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are expected to enable non-executable stack by default with PT_GNU_STACK by default and is thus likely to trigger a crash on older kernels. The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a non-executable stack while dropping support for older kernels. * System call wrappers for time system calls now use the new time64 system calls when available. On 32-bit targets, these wrappers attempt to call the new system calls first and fall back to the older 32-bit time system calls if they are not present. This may cause issues in environments that cannot handle unsupported system calls gracefully by returning -ENOSYS. Seccomp sandboxes are affected by this issue. Changes to build and runtime requirements: * It is no longer necessary to have recent Linux kernel headers to build working (non-stub) system call wrappers on all architectures except 64-bit RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0. * The ChangeLog file is no longer present in the toplevel directory of the source tree. ChangeLog files are located in the ChangeLog.old directory as ChangeLog.N where the highest N has the latest entries. Security related changes: CVE-2020-1751: A defect in the PowerPC backtrace function could cause an out-of-bounds write when executed in a signal frame context. CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program. Reported by Marcin Kościelnicki. The following bugs are resolved with this release: [12031] localedata: iconv -t ascii//translit with Greek characters [15813] libc: Multiple issues in __gen_tempname [17726] libc: [arm, sparc] profil_counter should be compat symbol [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h [19767] libc: vdso is not used with static linking [19903] hurd: Shared mappings not being inherited by children processes [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD [20839] dynamic-link: Incomplete rollback of dynamic linker state on linking failure [23132] localedata: Missing transliterations in Miscellaneous Mathematical Symbols-A/B Unicode blocks [23518] libc: Eliminate __libc_utmp_jump_table [24026] malloc: malloc_info() returns wrong numbers [24054] localedata: Many locales are missing date_fmt [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode [24304] dynamic-link: Lazy binding failure during ELF constructors/destructors is not fatal [24376] libc: RISC-V symbol size confusion with _start [24682] localedata: zh_CN first weekday should be Monday per GB/T 7408-2005 [24824] libc: test-in-container does not install charmap files compatible with localedef [24844] regex: regex bad pointer / leakage if malloc fails [24867] malloc: Unintended malloc_info formatting changes [24879] libc: login: utmp alarm timer can arrive after lock acquisition [24880] libc: login: utmp implementation uses struct flock with fcntl64 [24882] libc: login: pututline uses potentially outdated cache [24899] libc: Missing nonstring attributes in , [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale utmp entries [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to ABSOLUTE ABI [24930] dynamic-link: dlopen of PIE executable can result in _dl_allocate_tls_init assertion failure [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC (stringop-overflow error) [24959] time: librt IFUNC resolvers for clock_gettime and clock_* functions other can lead to crashes [24967] libc: jemalloc static linking causes runtime failure [24986] libc: alpha: new getegid, geteuid and getppid syscalls used unconditionally [25035] libc: sbrk() failure handled poorly in tunables_strdup [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement [25097] libc: new -Warray-bounds with GCC 10 [25112] dynamic-link: dlopen must not make new objects accessible when it still can fail with an error [25139] localedata: Please add the new mnw_MM locale [25149] regex: Array bounds violation in proceed_next_node [25157] dynamic-link: Audit cookie for the dynamic loader is not initialized correctly [25189] libc: glibc's __glibc_has_include causes issues with clang -frewrite-includes [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt value to an unsigned [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid binaries (CVE-2019-19126) [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf- protection [25226] string: strstr: Invalid result if needle crosses page on s390-z15 ifunc variant. [25232] string: does not enable const correctness for strchr et al. for Clang++ [25233] localedata: Consider "." as the thousands separator for sl_SI (Slovenian) [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG. [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling with -std=c11 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M" [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time part [25396] dynamic-link: Failing dlopen can leave behind dangling GL (dl_initfirst) link map pointer [25401] malloc: pvalloc must not have __attribute_alloc_size__ [25423] libc: Array overflow in backtrace on powerpc [25425] network: Missing call to __resolv_context_put in getaddrinfo.c:gethosts Version 2.30 Major new features: * Unicode 12.1.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 12.1.0, using generator scripts contributed by Mike FABIAN (Red Hat). * The dynamic linker accepts the --preload argument to preload shared objects, in addition to the LD_PRELOAD environment variable. * The twalk_r function has been added. It is similar to the existing twalk function, but it passes an additional caller-supplied argument to the callback function. * On Linux, the getdents64, gettid, and tgkill functions have been added. * Minguo (Republic of China) calendar support has been added as an alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW, nan_TW, lzh_TW. * The entry for the new Japanese era has been added for ja_JP locale. * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc, pvalloc, memalign, and posix_memalign fail now with total object size larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with pointer subtraction within the allocated object, where results might overflow the ptrdiff_t type. * The dynamic linker no longer refuses to load objects which reference versioned symbols whose implementation has moved to a different soname since the object has been linked. The old error message, symbol FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with link time reference, is gone. * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock, pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait functions. These behave similarly to their "timed" equivalents, but also accept a clockid_t parameter to determine which clock their timeout should be measured against. All functions allow waiting against CLOCK_MONOTONIC and CLOCK_REALTIME. The decision of which clock to be used is made at the time of the wait (unlike with pthread_condattr_setclock, which requires the clock choice at initialization time). * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still work, new resolvers can use a second argument which can be extended in the future, currently it contains the AT_HWCAP2 value. Deprecated and removed features, and other changes affecting compatibility: * The copy_file_range function fails with ENOSYS if the kernel does not support the system call of the same name. Previously, user space emulation was performed, but its behavior did not match the kernel behavior, which was deemed too confusing. Applications which use the copy_file_range function can no longer rely on glibc to provide a fallback on kernels that do not support the copy_file_range system call, and if this function returns ENOSYS, they will need to use their own fallback. Support for copy_file_range for most architectures was added in version 4.5 of the mainline Linux kernel. * The functions clock_gettime, clock_getres, clock_settime, clock_getcpuclockid, clock_nanosleep were removed from the librt library for new applications (on architectures which had them). Instead, the definitions in libc will be used automatically, which have been available since glibc 2.17. * The obsolete and never-implemented XSI STREAMS header files and have been removed. * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6 resolver flag (deprecated in glibc 2.25) have been removed. * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub resolver have been removed from . * With --enable-bind-now, installed programs are now linked with the BIND_NOW flag. * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe* configurations) has been removed, following the deprecation of this subarchitecture in version 8 of GCC, and its removal in version 9. * On 32-bit Arm, support for the port-based I/O emulation and the header have been removed. * The Linux-specific header and the sysctl function have been deprecated and will be removed from a future version of glibc. Application should directly access /proc instead. For obtaining random bits, the getentropy function can be used. Changes to build and runtime requirements: * GCC 6.2 or later is required to build the GNU C Library. Older GCC versions and non-GNU compilers are still supported when compiling programs that use the GNU C Library. Security related changes: CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check size. For x86-64, memcmp on an object size larger than SSIZE_MAX has undefined behavior. On x32, the size_t argument may be passed in the lower 32 bits of the 64-bit RDX register with non-zero upper 32 bits. When it happened with the sign bit of RDX register set, memcmp gave the wrong result since it treated the size argument as zero. Reported by H.J. Lu. CVE-2019-9169: Attempted case-insensitive regular-expression match via proceed_next_node in posix/regexec.c leads to heap-based buffer over-read. Reported by Hongxu Chen. The following bugs are resolved with this release: [2872] locale: Transliteration Cyrillic -> ASCII fails [6399] libc: gettid() should have a wrapper [16573] malloc: mtrace hangs when MALLOC_TRACE is defined [16976] glob: fnmatch unbounded stack VLA for collating symbols [17396] localedata: globbing for locale by [[.collating-element.]] [18035] dynamic-link: pldd does no longer work, enters infinite loop [18465] malloc: memusagestat is built using system C library [18830] locale: iconv -c -f ascii with >buffer size worth of input before invalid input drops valid char [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8 [21897] localedata: Afar locales: Fix mon, abmon, and abday [22964] localedata: The Japanese Era name will be changed on May 1, 2019 [23352] malloc: __malloc_check_init still defined in public header malloc.h. [23403] nptl: Wrong alignment of TLS variables [23501] libc: nftw() doesn't return dangling symlink's inode [23733] malloc: Check the count before calling tcache_get() [23741] malloc: Missing __attribute_alloc_size__ in many allocation functions [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep [23844] nptl: pthread_rwlock_trywrlock results in hang [23983] argparse: Missing compat versions of argp_failure and argp_error for long double = double [23984] libc: Missing compat versions of err.h and error.h functions for long double = double [23996] localedata: Dutch salutations [24040] libc: riscv64: unterminated call chain in __thread_start [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid long timeouts [24051] stdio: puts and putchar output to _IO_stdout instead of stdout [24059] nss: nss_files: get_next_alias calls fgets_unlocked without checking for NULL. [24114] regex: regexec buffer read overrun in "grep -i '\(\(\)*.\)*\(\)\(\)\1'" [24122] libc: Segfaults if 0 returned from la_version [24153] stdio: Some input functions do not react to stdin assignment [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in RDX is set) (CVE-2019-7309) [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm, not the default "nor" [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN false positives, change to modern flexible array [24180] nptl: pthread_mutex_trylock does not use the correct order of instructions while maintaining the robust mutex list due to missing compiler barriers. [24194] librt: Non-compatibility symbols for clock_gettime etc. cause unnecessary librt dependencies [24200] localedata: Revert first_weekday removal in en_IE locale [24211] nptl: Use-after-free in Systemtap probe in pthread_join [24215] nptl: pthread_timedjoin_np should be a cancellation point [24216] malloc: Check for large bin list corruption when inserting unsorted chunk [24228] stdio: old x86 applications that use legacy libio crash on exit [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through to R_SPARC_H44 [24293] localedata: Missing Minguo calendar support for TW locales [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in tt_RU (Tatar) locale [24307] localedata: Update locale data to Unicode 12.0.0 [24323] dynamic-link: dlopen should not be able open PIE objects [24335] build: "Obsolete types detected" with Linux 5.0 headers [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in tt_RU (Tatar) locale [24370] localedata: Add lang_name for tt_RU locale [24372] locale: Binary locale files are not architecture independent [24394] time: strptime %Ey mis-parses final year of era [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror was not used [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in- tests [24531] malloc: Malloc tunables give tcache assertion failures [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit time_t changes [24535] localedata: Update locale data to Unicode 12.1.0 [24537] build: nptl/tst-eintr1 test case can hit task limits on some kernels and break testing [24544] build: elf/tst-pldd doesn't work if you install with a --prefix [24556] build: [GCC 9] error: ‘%s’ directive argument is null [-Werror=format-overflow=] [24570] libc: alpha: compat msgctl uses __IPC_64 [24584] locale: Data race in __wcsmbs_clone_conv [24588] stdio: Remove codecvt vtables from libio [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with -O3 -march=skylake [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35 [24632] stdio: Old binaries which use freopen with default stdio handles crash [24640] libc: __ppc_get_timebase_freq() always return 0 when using static linked glibc [24652] localedata: szl_PL spelling correction [24695] nss: nss_db: calling getpwent after endpwent crashes [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry in /etc/nsswitch.conf [24699] libc: mmap64 with very large offset broken on MIPS64 n32 [24740] libc: getdents64 type confusion [24741] dynamic-link: ld.so should not require that a versioned symbol is always implemented in the same library [24744] libc: Remove copy_file_range emulation [24757] malloc: memusagestat is linked against system libpthread [24794] libc: Partial test suite run builds corrupt test-in-container testroot Version 2.29 Major new features: * The getcpu wrapper function has been added, which returns the currently used CPU and NUMA node. This function is Linux-specific. * A new convenience target has been added for distribution maintainers to build and install all locales as directories with files. The new target is run by issuing the following command in your build tree: 'make localedata/install-locale-files', with an optional DESTDIR to set the install root if you wish to install into a non-default configured location. * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf. * The reallocarray function is now declared under _DEFAULT_SOURCE, not just for _GNU_SOURCE, to match BSD environments. * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel indicates that it will abort the transaction prior to entering the kernel (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is suspended, and this caused some undefined side-effects issues by aborting transactions manually. Glibc avoided it by abort transactions manually on each syscall, but it lead to performance issues on newer kernels where the HTM state is saved and restore lazily (the state being saved even when the process actually does not use HTM). * The functions posix_spawn_file_actions_addchdir_np and posix_spawn_file_actions_addfchdir_np have been added, enabling posix_spawn and posix_spawnp to run the new process in a different directory. These functions are GNU extensions. The function posix_spawn_file_actions_addchdir_np is similar to the Solaris function of the same name. * The popen and system do not run atfork handlers anymore (BZ#17490). Although it is a possible POSIX violation, the POSIX rationale in pthread_atfork documentation regarding atfork handlers is to handle inconsistent mutex state after a fork call in a multi-threaded process. In both popen and system there is no direct access to user-defined mutexes. * Support for the C-SKY ABIV2 running on Linux has been added. This port requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are supported: - C-SKY ABIV2 soft-float little-endian - C-SKY ABIV2 hard-float little-endian * strftime's default formatting of a locale's alternative year (%Ey) has been changed to zero-pad the year to a minimum of two digits, like "%y". This improves the display of Japanese era years during the first nine years of a new era, and is expected to be harmless for all other locales (only Japanese locales regularly have alternative year numbers less than 10). Zero-padding can be overridden with the '_' or '-' flags (which are GNU extensions). * As a GNU extension, the '_' and '-' flags can now be applied to "%EY" to control how the year number is formatted; they have the same effect that they would on "%Ey". Deprecated and removed features, and other changes affecting compatibility: * The glibc.tune tunable namespace has been renamed to glibc.cpu and the tunable glibc.tune.cpu has been renamed to glibc.cpu.name. * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined in , has been corrected to match the type actually used by the Linux kernel. This affects the size and layout of that structure on MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V. * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo, defined in , has been corrected to match the type actually used by the Linux kernel. This affects the size and layout of those structures. * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]' meant to scan a string and allocate space for it with malloc, is now restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE defined. This extension conflicts with C99's use of '%a' to scan a hexadecimal floating-point number, which is now available to programs compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE. POSIX.1-2008 includes the feature of allocating a buffer for string input with malloc, using the modifier letter 'm' instead. Programs using '%as', '%aS', or '%a[...]' with the old GNU meaning should change to '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the C99 '%a' no longer need to avoid _GNU_SOURCE. GCC's -Wformat warnings can detect most uses of this extension, as long as all functions that call vscanf, vfscanf, or vsscanf are annotated with __attribute__ ((format (scanf, ...))). Changes to build and runtime requirements: * Python 3.4 or later is required to build the GNU C Library. * On most architectures, GCC 5 or later is required to build the GNU C Library. (On powerpc64le, GCC 6.2 or later is still required, as before.) Older GCC versions and non-GNU compilers are still supported when compiling programs that use the GNU C Library. Security related changes: CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a denial of service due to resource exhaustion when processing getaddrinfo calls with crafted host names. Reported by Guido Vranken. CVE-2019-6488: On x32, the size_t parameter may be passed in the lower 32 bits of a 64-bit register with with non-zero upper 32 bit. When it happened, accessing the 32-bit size_t value as the full 64-bit register in the assembly string/memory functions would cause a buffer overflow. Reported by H.J. Lu. CVE-2016-10739: The getaddrinfo function could successfully parse IPv4 addresses with arbitrary trailing characters, potentially leading to data or command injection issues in applications. The following bugs are resolved with this release: [10425] localedata: it_IT/it_CH: LC_TIME format is wrong [10496] localedata: 12h time representation in multiple locales faulty [10797] localedata: it_IT locale numeric does not have a separator for thousands [11319] libc: dprintf doesn't handle errors properly [16346] time: mktime: potentially unsafe use of localtime_offset [17248] build: glibc should not sort CFLAGS (support gcc plugins and --param options) [17405] libc: Implement posix_spawn_file_actions_addchdir_np, posix_spawn_file_actions_addfchdir_np [17426] localedata: Indian locales: set the correct date format [17490] stdio: popen should not invoke atfork handlers [17783] libc: TIOCSER_TEMT conditions inconsistent [18040] regex: use-after-free in regexec/get_subexp [18093] libc: Corrupted aux-cache causes ldconfig to segfault [20018] network: getaddrinfo should reject IP addresses with trailing characters (CVE-2016-10739) [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL [20271] libc: Missing "\n" in __libc_fatal calls [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function pointer argument is non-NULL [21037] stdio: open_memstream and freopen [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT [21716] time: Crash in glibc's mktime in low-memory situations [22834] stdio: Subprocess forked by popen may crash in Linux when multithreads call popen [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL and pthread_create fails. [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ? [23125] libc: riscv64: endless loop when throwing an exception from a constructor [23275] nptl: Race in pthread_mutex_lock while promoting to PTHREAD_MUTEX_ELISION_NP. [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc source tree [23479] math: [mips] bits/fenv.h should not define some macros for soft- float [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by one error [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream [23509] dynamic-link: CET enabled glibc is incompatible with the older linker [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers [23521] nss: get_next_alias nss_files file stream leak [23538] nptl: Hang in pthread_cond_broadcast [23562] libc: Wrong type for si_band in Linux-specific siginfo_t [23578] regex: Invalid memory access if regex pattern contains NUL byte [23579] libc: Errors misreported in preadv2 [23597] build: support/test-container.c doesn't work with different filesystems [23603] time: mktime signed integer overflow on large timestamps [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S [23614] libc: powerpc: missing CFI register information in __mpn_* functions [23637] string: Generic strstr/strcasestr fails with huge needles [23640] libc: no way to easily clear FD_CLOEXEC in posix_spawn_file_actions_adddup2() [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid have wrong type [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have wrong type [23679] libc: gethostid: Missing NULL check for gethostbyname_r result [23689] libc: Bug in documentation for rusage.ru_ixrss in bits/types/struct_rusage.h [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of threads [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl- start.S [23709] string: glibc 2.25 lacks sse2 optimized strstr() [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on powerpc64le [23724] localedata: Albanian date formats are incorrect [23735] math: libnldbl_nonshared.a references internal libm symbols [23740] localedata: kl_GL: Month names and date formats need update [23744] regex: regex refactorings to remove BE, avoid duplication [23745] time: mktime fix for Gnulib + coreutils [23758] time: Improve the width of alternate representation for year in strftime [23783] libc: [mips] Missing CMSPAR bits/termios.h [23789] time: mktime does not set errno on failure [23791] localedata: Wrong monetary format for ca_ES locale [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc [23794] locale: c16rtomb does not handle surrogate pairs [23821] libc: si_band in siginfo_t has wrong type long int on sparc64 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols [23836] time: time/tst-mktime2 test failure on Arm (32-bit) [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock [23862] libc: [sh] missing kernel-features.h undefines [23864] libc: [riscv] missing kernel-features.h undefines [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect [23907] malloc: Incorrect double-free malloc tcache check disregards tcache size [23913] libc: off-by-one in function maybe_script_execute in sysdeps/posix/spawni.c [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect [23923] locale: Add --no-hard-links option to localedef [23927] network: Linux if_nametoindex() does not close descriptor (CVE-2018-19591) [23961] math: powf can overflow to inf without setting errno in non- nearest rounding mode [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k [23972] libc: __old_getdents64 uses wrong d_off value on overflow [23993] libc: glibc 2.29 doesn't build with gcc 4.9 [23995] localedata: Remove execution flags from localedata/locales/bi_VU [24011] localedata: Fixed small type in comment for locale bs_BA [24018] libc: gettext() may return NULL [24022] build: riscv build failure with Linux kernel 4.20-rc7 [24023] build: [2.29 Regression] FAIL: elf/check-localplt [24024] string: strerror() might set errno to ENOMEM due to -fno-math- error [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when using GCC 8 [24046] localedata: en_US locale doesn't define date_fmt [24063] manual: @var{errno} should be @code{errno} [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check [24088] libc: VSCR field is not being correctly read in ucontext_t on ppc64le [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the expected result [24097] string: Can't use 64-bit register for size_t in assembly codes for x32 (CVE-2019-6488) [24110] hurd: SS_DISABLE never set in stack_t value returned by sigaltstack [24112] network: Do not send DNS queries for non-host names (where all answers will be rejected) [24130] libc: alpha __remqu corrupts $f3 register Version 2.28 Major new features: * The localization data for ISO 14651 is updated to match the 2016 Edition 4 release of the standard, this matches data provided by Unicode 9.0.0. This update introduces significant improvements to the collation of Unicode characters. This release deviates slightly from the standard in that the collation element ordering for lowercase and uppercase LATIN script characters is adjusted to ensure that regular expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A is not matched by [a-z]. With the update many locales have been updated to take advantage of the new collation information. The new collation information has increased the size of the compiled locale archive or binary locales. * The GNU C Library can now be compiled with support for Intel CET, AKA Intel Control-flow Enforcement Technology. When the library is built with --enable-cet, the resulting glibc is protected with indirect branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is compatible with all existing executables and shared libraries. This feature is currently supported on i386, x86_64 and x32 with GCC 8 and binutils 2.29 or later. Note that CET-enabled glibc requires CPUs capable of multi-byte NOPs, like x86-64 processors as well as Intel Pentium Pro or newer. NOTE: --enable-cet has been tested for i686, x86_64 and x32 on non-CET processors. --enable-cet has been tested for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been validated for i686. * The GNU C Library now has correct support for ABSOLUTE symbols (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were relocated incorrectly or in some cases discarded. The GNU linker can make use of the newer semantics, but it must communicate it to the dynamic loader by setting the ELF file's identification (EI_ABIVERSION field) to indicate such support is required. * Unicode 11.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 11.0.0, using generator scripts contributed by Mike FABIAN (Red Hat). * functions that round their results to a narrower type are added from TS 18661-1:2014 and TS 18661-3:2015: - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and fMxaddfNx functions. - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and fMxsubfNx functions. - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and fMxmulfNx functions. - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and fMxdivfNx functions. * Two grammatical forms of month names are now supported for the following languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian, Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now support two grammatical forms in abbreviated month names: Catalan, Greek, and Kashubian. * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also include the support for two grammatical forms of month names. * Building and running on GNU/Hurd systems now works without out-of-tree patches. * The renameat2 function has been added, a variant of the renameat function which has a flags argument. If the flags are zero, the renameat2 function acts like renameat. If the flag is not zero and there is no kernel support for renameat2, the function will fail with an errno value of EINVAL. This is different from the existing gnulib function renameatu, which performs a plain rename operation in case of a RENAME_NOREPLACE flags and a non-existing destination (and therefore has a race condition that can clobber the destination inadvertently). * The statx function has been added, a variant of the fstatat64 function with an additional flags argument. If there is no direct kernel support for statx, glibc provides basic stat support based on the fstatat64 function. * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2 library if installed. libidn2 version 2.0.5 or later is recommended. If libidn2 is not available, internationalized domain names are not encoded or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail with an encoding error.) Flags which used to change the IDN encoding and decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES, NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been deprecated. They no longer have any effect. * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED, DT_AUXILIARY, and DT_FILTER has been expanded to support the full range of ELF gABI expressions including such constructs as '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules have been further restricted, and where in the past a dynamic string token sequence may have been interpreted as a literal string it will now cause a load failure. These load failures were always considered unspecified behaviour from the perspective of the dynamic loader, and for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED results in a load failure now. * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The implementation includes all the standard functions provided by : - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create, thrd_detach, thrd_exit, and thrd_join for thread management. - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and mtx_destroy for mutual exclusion. - call_once for function call synchronization. - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and cnd_wait for conditional variables. - tss_create, tss_delete, tss_get, and tss_set for thread-local storage. Application developers must link against libpthread to use ISO C threads. Deprecated and removed features, and other changes affecting compatibility: * The nonstandard header files and <_G_config.h> are no longer installed. Software that was using either header should be updated to use standard interfaces instead. * The stdio functions 'getc' and 'putc' are no longer defined as macros. This was never required by the C standard, and the macros just expanded to call alternative names for the same functions. If you hoped getc and putc would provide performance improvements over fgetc and fputc, instead investigate using (f)getc_unlocked and (f)putc_unlocked, and, if necessary, flockfile and funlockfile. * All stdio functions now treat end-of-file as a sticky condition. If you read from a file until EOF, and then the file is enlarged by another process, you must call clearerr or another function with the same effect (e.g. fseek, rewind) before you can read the additional data. This corrects a longstanding C99 conformance bug. It is most likely to affect programs that use stdio to read interactive input from a terminal. (Bug #1190.) * The macros 'major', 'minor', and 'makedev' are now only available from the header ; not from or various other headers that happen to include . These macros are rarely used, not part of POSIX nor XSI, and their names frequently collide with user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for further explanation. is a GNU extension. Portable programs that require these macros should first include , and then include if __GNU_LIBRARY__ is defined. * The tilegx*-*-linux-gnu configurations are no longer supported. * The obsolete function ustat is no longer available to newly linked binaries; the headers and have been removed. This function has been deprecated in favor of fstatfs and statfs. * The obsolete function nfsservctl is no longer available to newly linked binaries. This function was specific to systems using the Linux kernel and could not usefully be used with the GNU C Library on systems with version 3.1 or later of the Linux kernel. * The obsolete function name llseek is no longer available to newly linked binaries. This function was specific to systems using the Linux kernel and was not declared in a header. Programs should use the lseek64 name for this function instead. * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the getaddrinfo and getnameinfo functions have been deprecated. The behavior previously selected by them is now always enabled. * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for the getaddrinfo and getnameinfo functions have been deprecated. The STD3 restriction (rejecting '_' in host names, among other things) has been removed, for increased compatibility with non-IDN name resolution. * The fcntl function now have a Long File Support variant named fcntl64. It is added to fix some Linux Open File Description (OFD) locks usage on non LFS mode. As for others *64 functions, fcntl64 semantics are analogous with fcntl and LFS support is handled transparently. Also for Linux, the OFD locks act as a cancellation entrypoint. * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt, ecb_crypt, and des_setparity are no longer available to newly linked binaries, and the headers and are no longer installed. These functions encrypted and decrypted data with the DES block cipher, which is no longer considered secure. Software that still uses these functions should switch to a modern cryptography library, such as libgcrypt. * Reflecting the removal of the encrypt and setkey functions above, the macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is enabled. * The obsolete function fcrypt is no longer available to newly linked binaries. It was just another name for the standard function crypt, and it has not appeared in any header file in many years. * We have tentative plans to hand off maintenance of the passphrase-hashing library, libcrypt, to a separate development project that will, we hope, keep up better with new passphrase-hashing algorithms. We will continue to declare 'crypt' in , and programs that use 'crypt' or 'crypt_r' should not need to change at all; however, distributions will need to install and libcrypt from a separate project. In this release, if the configure option --disable-crypt is used, glibc will not install or libcrypt, making room for the separate project's versions of these files. The plan is to make this the default behavior in a future release. Changes to build and runtime requirements: GNU make 4.0 or later is now required to build glibc. Security related changes: CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have been fixed by removing the glibc-internal IDNA implementation and using the system-provided libidn2 library instead. Originally reported by Hanno Böck and Christian Weisgerber. CVE-2017-18269: An SSE2-based memmove implementation for the i386 architecture could corrupt memory. Reported by Max Horn. CVE-2018-11236: Very long pathname arguments to realpath function could result in an integer overflow and buffer overflow. Reported by Alexey Izbyshev. CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi architecture could write beyond the target buffer, resulting in a buffer overflow. Reported by Andreas Schwab. The following bugs are resolved with this release: [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant [6889] manual: 'PWD' mentioned but not specified [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t, when __WORDSIZE != 64 [13762] regex: re_search etc. should return -2 on memory exhaustion [13888] build: /tmp usage during testing [13932] math: dbl-64 pow unexpectedly slow for some inputs [14092] nptl: Support C11 threads [14095] localedata: Review / update collation data from Unicode / ISO 14651 [14508] libc: -Wformat warnings [14553] libc: Namespace pollution loff_t in sys/types.h [14890] libc: Make NT_PRFPREG canonical. [15105] libc: Extra PLT references with -Os [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign- conversion is given [16335] manual: Feature test macro documentation incomplete and out of date [16552] libc: Unify umount implementations in terms of umount2 [17082] libc: htons et al.: statement-expressions prevent use on global scope with -O1 and higher [17343] libc: Signed integer overflow in /stdlib/random_r.c [17438] localedata: pt_BR: wrong d_fmt delimiter [17662] libc: please implement binding for the new renameat2 syscall [17721] libc: __restrict defined as /* Ignore */ even in c11 [17979] libc: inconsistency between uchar.h and stdint.h [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536) [18023] libc: extend_alloca is broken (questionable pointer comparison, horrible machine code) [18124] libc: hppa: setcontext erroneously returns -1 as exit code for last constant. [18471] libc: llseek should be a compat symbol [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat symbols [18991] nss: nss_files skips large entry in database [19239] libc: Including stdlib.h ends up with macros major and minor being defined [19463] libc: linknamespace failures when compiled with -Os [19485] localedata: csb_PL: Update month translations + add yesstr/nostr [19527] locale: Normalized charset name not recognized by setlocale [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c' [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext- fpscr.c' [19728] network: out of bounds stack read in libidn function idna_to_ascii_4i (CVE-2016-6261) [19729] network: out of bounds heap read on invalid utf-8 inputs in stringprep_utf8_nfkc_normalize (CVE-2016-6263) [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by the base address [20079] libc: Add SHT_X86_64_UNWIND to elf.h [20251] libc: 32bit programs pass garbage in struct flock for OFD locks [20419] dynamic-link: files with large allocated notes crash in open_verify [20530] libc: bswap_16 should use __builtin_bswap16() when available [20890] dynamic-link: ldconfig: fsync the files before atomic rename [20980] manual: CFLAGS environment variable replaces vital options [21163] regex: Assertion failure in pop_fail_stack when executing a malformed regexp (CVE-2015-8985) [21234] manual: use of CFLAGS makes glibc detect no optimization [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong [21313] build: Compile Error GCC 5.4.0 MIPS with -0S [21314] build: Compile Error GCC 5.2.0 MIPS with -0s [21508] locale: intl/tst-gettext failure with latest msgfmt [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan) [21812] network: getifaddrs() returns entries with ifa_name == NULL [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static dlopen [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with AT_SECURE=1 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU) [22247] network: Integer overflow in the decode_digit function in puny_decode.c in libidn (CVE-2017-14062) [22342] nscd: NSCD not properly caching netgroup [22391] nptl: Signal function clear NPTL internal symbols inconsistently [22550] localedata: es_ES locale (and other es_* locales): collation should treat ñ as a primary different character, sync the collation for Spanish with CLDR [22638] dynamic-link: sparc: static binaries are broken if glibc is built by gcc configured with --enable-default-pie [22639] time: year 2039 bug for localtime etc. on 64-bit platforms [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when crossing 2GB threshold (CVE-2017-18269) [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and es_BO [22735] time: Misleading typo in time.h source comment regarding CLOCKS_PER_SECOND [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1 [22761] libc: No trailing `%n' conversion specifier in FMT passed from `__assert_perror_fail ()' to `__assert_fail_base ()' [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust dlopen failures [22786] libc: Stack buffer overflow in realpath() if input size is close to SSIZE_MAX (CVE-2018-11236) [22787] dynamic-link: _dl_check_caller returns false when libc is linked through an absolute DT_NEEDED path [22792] build: tcb-offsets.h dependency dropped [22797] libc: pkey_get() uses non-reserved name of argument [22807] libc: PTRACE_* constants missing for powerpc [22818] glob: posix/tst-glob_lstat_compat failure on alpha [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig [22830] malloc: malloc_stats doesn't restore cancellation state on stderr [22848] localedata: ca_ES: update date definitions from CLDR [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly [22896] localedata: Update locale data for an_ES [22902] math: float128 test failures with GCC 8 [22918] libc: multiple common of `__nss_shadow_database' [22919] libc: sparc32: backtrace yields infinite backtrace with makecontext [22926] libc: FTBFS on powerpcspe [22932] localedata: lt_LT: Update of abbreviated month names from CLDR required [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon [22947] libc: FAIL: misc/tst-preadvwritev2 [22963] localedata: cs_CZ: Add alternative month names [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling [22996] localedata: change LC_PAPER to en_US in es_BO locale [22998] dynamic-link: execstack tests are disabled when SELinux is disabled [23005] network: Crash in __res_context_send after memory allocation failure [23007] math: strtod cannot handle -nan [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set [23036] regex: regex equivalence class regression [23037] libc: initialize msg_flags to zero for sendmmsg() calls [23069] libc: sigaction broken on riscv64-linux-gnu [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable patterns in runpath entries (e.g. $ORIGIN$ORIGIN) [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit and libc build with -Os) [23140] localedata: More languages need two forms of month names [23145] libc: _init/_fini aren't marked as hidden [23152] localedata: gd_GB: Fix typo in "May" (abbreviated) [23171] math: C++ iseqsig for long double converts arguments to double [23178] nscd: sudo will fail when it is run in concurrent with commands that changes /etc/passwd [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies (CVE-2018-11237) [23206] dynamic-link: static-pie + dlopen breaks debugger interaction [23208] localedata: New locale - Lower Sorbian (dsb) [23233] regex: Memory leak in build_charclass_op function in file posix/regcomp.c [23236] stdio: Harden function pointers in _IO_str_fields [23250] nptl: Offset of __private_ss differs from GCC [23253] math: tgamma test suite failures on i686 with -march=x86-64 -mtune=generic -mfpmath=sse [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for AT_SECURE [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus- parser.c [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY [23277] math: nan function should not have const attribute [23279] math: scanf and strtod wrong for some hex floating-point [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and directed rounding [23290] localedata: IBM273 is not equivalent to ISO-8859-1 [23303] build: undefined reference to symbol '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23' [23307] dynamic-link: Absolute symbols whose value is zero ignored in lookup [23313] stdio: libio vtables validation and standard file object interposition [23329] libc: The __libc_freeres infrastructure is not properly run across DSO boundaries. [23349] libc: Various glibc headers no longer compatible with [23351] malloc: Remove unused code related to heap dumps and malloc checking [23363] stdio: stdio-common/tst-printf.c has non-free license [23396] regex: Regex equivalence regression in single-byte locales [23422] localedata: oc_FR: More updates of locale data [23442] build: New warning with GCC 8 [23448] libc: Out of bounds access in IBM-1390 converter [23456] libc: Wrong index_cpu_LZCNT [23458] build: tst-get-cpu-features-static isn't added to tests [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel processors [23467] dynamic-link: x86/CET: A property note parser bug Version 2.27 Major new features: * The GNU C Library can now be compiled with support for building static PIE executables (See --enable-static-pie in INSTALL). These static PIE executables are like static executables but can be loaded at any address and provide additional security hardening benefits at the cost of some memory and performance. When the library is built with --enable-static-pie the resulting libc.a is usable with GCC 8 and above to create static PIE executables using the GCC option '-static-pie'. This feature is currently supported on i386, x86_64 and x32 with binutils 2.29 or later, and on aarch64 with binutils 2.30 or later. * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf, sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and H.J. Lu from Intel. * Optimized x86-64 trunc and truncf for processors with SSE4.1. * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf. * In order to support faster and safer process termination the malloc API family of functions will no longer print a failure address and stack backtrace after detecting heap corruption. The goal is to minimize the amount of work done after corruption is detected and to avoid potential security issues in continued process execution. Reducing shutdown time leads to lower overall process restart latency, so there is benefit both from a security and performance perspective. * The abort function terminates the process immediately, without flushing stdio streams. Previous glibc versions used to flush streams, resulting in deadlocks and further data corruption. This change also affects process aborts as the result of assertion failures. * On platforms where long double has the IEEE binary128 format (aarch64, alpha, mips64, riscv, s390 and sparc), the math library now implements _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015. These are the same interfaces added in version 2.26 for some platforms where this format is supported but is not the format of long double. * On platforms with support for _Float64x (aarch64, alpha, i386, ia64, mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now implements interfaces for that type, as defined by ISO/IEC TS 18661-3:2015. These are corresponding interfaces to those supported for _Float128. * The math library now implements interfaces for the _Float32, _Float64 and _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are corresponding interfaces to those supported for _Float128. * glibc now implements the memfd_create and mlock2 functions on Linux. * Support for memory protection keys was added. The header now declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set, pkey_get. * The copy_file_range function was added. * Optimized memcpy, mempcpy, memmove, and memset for sparc M7. * The ldconfig utility now processes `include' directives using the C/POSIX collation ordering. Previous glibc versions used locale-specific ordering, the change might break systems that relied on that. * Support for two grammatical forms of month names has been added. In a call to strftime, the "%B" and "%b" format specifiers will now produce the grammatical form required when the month is used as part of a complete date. New "%OB" and "%Ob" specifiers produce the form required when the month is named by itself. For instance, in Greek and in many Slavic and Baltic languages, "%B" will produce the month in genitive case, and "%OB" will produce the month in nominative case. In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh" are all valid and will all accept any known form of month name---standalone or complete, abbreviated or full. In a call to nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return the strings used by "%B" and "%b", respectively. New query constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings used by "%OB" and "%Ob", respectively. In a locale definition file, use "alt_mon" and "ab_alt_mon" to define the strings for %OB and %Ob, respectively; these have the same syntax as "mon" and "abmon". These arrays are optional; if they are not provided then they have the same content as "mon" and "abmon", respectively. These features are provided for locales which define "alt_mon" and/or "ab_alt_mon" in their locale source data. This release includes such alternative month name data for the following languages: Belarusian, Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian. This feature is currently a GNU extension, but it is expected to be added to the next revision of POSIX, and it is also already available on some BSD-derived operating systems. This feature will cause existing statically compiled applications to fail to load locales and fall back to the builtin C/POSIX locales. See notes below for other changes affecting compatibility. * Support for the RISC-V ISA running on Linux has been added. This port requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported for the following ISA and ABI pairs: - rv64imac lp64 - rv64imafdc lp64 - rv64imafdc lp64d Deprecated and removed features, and other changes affecting compatibility: * Statically compiled applications attempting to load locales compiled for the GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX locale. The reason for this is that the addition of the new "%OB" and "%Ob", support for two grammatical forms of the month names, also extends the locale data binary format. Static applications needing locale support must be recompiled to match the runtime and data they are deployed with. In some distributions there is an upgrade window where dynamically linked applications may use a new library but the old locale data and also fall back to the builtin C/POSIX locales; restarting the application process is sufficient to fix this. * Support for statically linked applications which call dlopen is deprecated and will be removed in a future version of glibc. Applications which call dlopen need to be linked dynamically instead. * Support for old programs which use internal stdio data structures and functions is deprecated. This includes programs which use the C++ streams provided by libstdc++ in GCC 2.95. Programs which use the internal symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish, _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn, _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach, _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen, _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open, _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff, _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow, _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all, _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area, _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end, _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in, _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock, _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark, _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static, _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow, _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode, _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish, _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow, _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write, _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow, _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a future version of glibc. Unlike other symbol removals, these old applications will not be supported using compatibility symbols. * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer defined by . * libm no longer supports SVID error handling (calling a user-provided matherr function on error) or the _LIB_VERSION variable to control error handling. (SVID error handling and the _LIB_VERSION variable still work for binaries linked against older versions of the GNU C Library.) The libieee.a library is no longer provided. math.h no longer defines struct exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW, TLOSS, PLOSS and HUGE. * The libm functions pow10, pow10f and pow10l are no longer supported for new programs. Programs should use the standard names exp10, exp10f and exp10l for these functions instead. * The mcontext_t type is no longer the same as struct sigcontext. On platforms where it was previously the same, this changes the C++ name mangling for interfaces involving this type. * The add-ons mechanism for building additional packages at the same time as glibc has been removed. The --enable-add-ons configure option is now ignored. * The --without-fp configure option is now ignored. Whether hardware floating-point instructions are used is now configured based on whether the compiler used at configure time (without any options implied by a --with-cpu= configure option) uses such instructions. * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that the specified string can be parsed as a domain name. * In the malloc_info output, the element may contain another element, "subheaps", which contains the number of sub-heaps. * The libresolv function p_secstodate is no longer supported for new programs. * The tilepro-*-linux-gnu configuration is no longer supported. * The nonstandard header files and <_G_config.h> are deprecated and will be removed in a future release. Software that is still using either header should be updated to use standard interfaces instead. libio.h was originally the header for a set of supported GNU extensions, but they have not been maintained as such in many years, they are now standing in the way of improvements to stdio, and we don't think there are any remaining external users. _G_config.h was never intended for public use, but predates the bits convention. Changes to build and runtime requirements: * bison version 2.7 or later is required to generate code in the 'intl' subdirectory. Security related changes: CVE-2009-5064: The ldd script would sometimes run the program under examination directly, without preventing code execution through the dynamic linker. (The glibc project disputes that this is a security vulnerability; only trusted binaries must be examined using the ldd script.) CVE-2017-15670: The glob function, when invoked with GLOB_TILDE, suffered from a one-byte overflow during ~ operator processing (either on the stack or the heap, depending on the length of the user name). Reported by Tim Rühsen. CVE-2017-15671: The glob function, when invoked with GLOB_TILDE, would sometimes fail to free memory allocated during ~ operator processing, leading to a memory leak and, potentially, to a denial of service. CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and without GLOB_NOESCAPE, could write past the end of a buffer while unescaping user names. Reported by Tim Rühsen. CVE-2017-17426: The malloc function, when called with an object size near the value SIZE_MAX, would return a pointer to a buffer which is too small, instead of NULL. This was a regression introduced with the new malloc thread cache in glibc 2.26. Reported by Iain Buclaw. CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads to the allocation of too much memory. (This is not a security bug per se, it is mentioned here only because of the CVE assignment.) Reported by Qualys. CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation of the number of search path components. (This is not a security vulnerability per se because no trust boundary is crossed if the fix for CVE-2017-1000366 has been applied, but it is mentioned here only because of the CVE assignment.) Reported by Qualys. CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN for AT_SECURE or SUID binaries could be used to load libraries from the current directory. CVE-2018-1000001: Buffer underflow in realpath function when getcwd function succeeds without returning an absolute path due to unexpected behaviour of the Linux kernel getcwd syscall. Reported by halfdog. CVE-2018-6485: The posix_memalign and memalign functions, when called with an object size near the value of SIZE_MAX, would return a pointer to a buffer which is too small, instead of NULL. Reported by Jakub Wilk. CVE-2018-6551: The malloc function, when called with an object size near the value of SIZE_MAX, would return a pointer to a buffer which is too small, instead of NULL. The following bugs are resolved with this release: [866] glob: glob should match dangling symlinks [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3) [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan) locale [5997] math: Very slow execution of sinf function [10580] localedata: hr_HR: updated locale [10871] locale: 'mon' array should contain both nominative and genitive cases [12349] localedata: eu_ES: incorrect thousands separator [13605] localedata: shn_MM: new Shan locale [13805] localedata: ru_RU: currency should use ',' as radix point [13953] localedata: km_KH: locale update [13994] localedata: mjw_IN: new locale [14121] build: make writes .mo files in po directory [14333] libc: Fix the race between atexit() and exit() [14681] dynamic-link: _dl_get_origin leaks memory via executable link map. [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be "Bangla" [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full- width Latin characters [15332] localedata: es_CU: locale update [15436] stdio: Don't close or flush stdio streams on abort [15537] localedata: lv_LV: invalid collation for Latvian diacritical letters [16148] localedata: ca_ES: incorrect thousands separator [16750] dynamic-link: ldd should not try to execute the binaries (CVE-2009-5064) [16777] localedata: pl_PL: incorrect thousands separator in locale [16905] localedata: hanzi: new collation [17563] localedata: cmn_TW: add hanzi collation [17750] localedata: wrong collation order of diacritics in most locales [17804] libc: scandirat fails with ENOMEM because it checks for errno even if malloc succeeded [17956] build: Build fails on missing definitions from header file nss/nss.h when Mozilla NSS is used for cryptography [18203] libc: realpath() does not handle unreachable paths correctly [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race [18812] localedata: kab_DZ: new Kabyle Algeria locale [18822] libc: Internal functions are called via PLT [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64 [19170] libc: __gmon_start__ defined in hppa in crtn.S [19574] libc: glibc should support building static PIE binaries [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and U+309A [19971] glob: glob: Do not skip entries with zero d_ino values [19982] localedata: fr.po: spelling mistake for error code EXDEV [20008] localedata: km_KH: convert to translit_neutral [20009] localedata: tr_TR: convert LC_CTYPE to i18n [20142] math: [x86_64] Add SSE4.1 trunc, truncf [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening [20482] localedata: de_CH: abbreviated weekdays should be two letters [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale for Nicaragua [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing they're set, wrong errors returned by gaih_inet when lookup functions are not found. [20756] localedata: [PATCH] Use Unicode wise thousands separator [20826] network: posix/tst-getaddrinfo5 fails on hosts without network access [20952] localedata: yuw_PG: new locale [21084] localedata: charmaps/IBM858: new codepage [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype [21242] libc: assert gives pedantic warning in old gcc versions [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++ __regcall calling convention [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c [21326] libc: C99 functions are not declared for C++11 and later if _GNU_SOURCE is not predefined by g++ [21457] libc: sys/ucontext.h namespace [21530] libc: tmpfile() should be implemented using O_TMPFILE [21660] math: GCC fails to compile a formula with tgmath.h [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED); [21684] math: tgmath.h handling of complex integers [21685] math: tgmath.h handling of bit-fields [21686] math: tgmath.h handling of __int128 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES] locale [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack- protector=all [21750] localedata: column width of characters incompatible with classical wcwidth [21754] malloc: malloc: Perform as little work as possible after heap consistency check failures [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so [21791] string: Unused XXX_chk_XXX functions in libc.a [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to PIE [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian locales [21845] localedata: Added new Locale bho_NP [21853] localedata: Fix abday Which looks same as day in zh_SG [21854] localedata: Added New Locale en_SC [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than _dl_runtime_resolve_avx_slow [21885] network: getaddrinfo: gethosts does not release resolver context on memory allocation failure [21899] libc: XPG4.2 sigaction namespace [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is the suspect) [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by- default (i386) [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered errno value, causing getaddrinfo to fail [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME instead of EAI_NODATA [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux constant PTRACE_SEIZE_DEVEL [21930] math: C-only gcc builtins used in isinf [21932] network: Unpaired __resolv_context_get in generic get*_r implementation [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128 [21944] libc: sigval namespace [21951] localedata: Update hanzi collation by stroke [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in sysdeps/x86_64/fpu/e_expf.S [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack allocation in syscall loops) [21959] localedata: Fix Country name for xh_ZA [21960] localedata: Fix abmon for bem_ZM [21966] math: AVX2 mathvec functions use FMA without checking [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used? [21971] localedata: Added New Locale for mfe_MU [21972] libc: assert macro requires operator== (int) for its argument type [21973] math: [sparc] libm missing sqrtl compat symbol [21974] libc: Remove __bb_init_func and __bb_exit_func [21982] string: stratcliff.c: error: assuming signed overflow does not occur with -O3 [21986] stdio: __guess_grouping is called incorrectly [21987] math: [sparc32] wrong bits/long-double.h installed [22019] localedata: Wrong placement of monetary symbol in el_GR (negative amounts) [22022] localedata: Missing country_name for mni_IN [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for niu_NZ [22025] locale: iconv: Inconsistency between pointer mangling and NULL checks [22026] locale: iconv_open: heap overflow on gconv_init failure [22028] math: bits/math-finite.h _MSUF_ expansion namespace [22035] math: [m68k] bits/math-inline.h macro namespace [22038] localedata: Fix abbreviated weeks and months for Somali [22044] localedata: Remove redundant data for Limburgish Language [22050] malloc: Linking with -lmcheck does not hook __malloc_initialize_hook correctly [22051] libc: zero terminator in the middle of glibc's .eh_frame [22052] malloc: malloc failed to compile with GCC 7 and -O3 [22070] localedata: charmaps/UTF-8: wcwidth for Prepended_Concatenation_Mark codepoints set to 0 (should be 1) [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul Jungseong and Jongseong) should be 0 [22078] nss: nss_files performance issue in multi mode [22082] math: bits/math-finite.h exp10 condition [22086] libc: pcprofiledump incorrect cross-endian condition [22093] dynamic-link: ld.so no longer searches in .../x86_64 [22095] network: Name server address allocation memory leak in resolv.conf parsing after OOM [22096] network: __resolv_conf_attach can incorrectly free passed conf object [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects e.g. ET_GNU_DEBUG_* [22111] malloc: malloc: per thread cache is not returned when thread exits [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ [22134] libc: [linux] implement fexecve with execveat [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and ppc64le [22145] libc: ttyname() gives up too early in the face of namespaces [22146] math: C++ build issue with float128 on x86_64 [22153] nptl: nptl: save error code before process termination [22156] libc: [hppa,ia64,microblaze] Executable stack default [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no [22161] nscd: nscd cache prune for netgroups hangs after timeout bump [22165] libc: [hppa] Text relocations in libc.so [22180] libc: destructor registered via __cxa_atexit is called twice [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling symlinks") cause "make" segfaults [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and math_force_eval [22207] libc: FAIL: stdlib/test-atexit-race [22225] math: nearbyint arithmetic moved before feholdexcept [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols [22235] math: iscanonical in C++ and float128 [22243] math: log2(0) and log10(0) are wrong in downward rounding without the svid compat wrapper [22244] math: ynf and yn are wrong without the svid compat wrapper [22273] libc: Improper assert in Linux posix_spawn implementation [22284] libc: -pg -pie doesn't work [22292] locale: localedef exits with error 4 when it should be error 1 [22294] locale: Allow "" for int_currency_symbol definition in locales. [22295] locale: Don't warn on non-symbolic characters in locale sources in --verbose. [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade to 2.26 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670) [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux [22322] libc: [mips64] wrong bits/long-double.h installed [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671) [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping (CVE-2017-15804) [22336] localedata: cs_CZ LC_COLLATE does not use i18n [22343] malloc: Integer overflow in posix_memalign [22347] libc: getrandom() returns the number of bytes that were copied to the buffer even though the comments say "Return 0 on success and -1 on failure." [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with -m32 [22370] dynamic-link: Incorrect note padding check [22375] libc: malloc returns pointer from tcache_get when should return NULL (CVE-2017-17426) [22377] math: iseqsig, float128 and C++ [22382] localedata: Error in tpi_PG locale [22387] localedata: Replace unicode sequences for characters inside the ASCII printable range [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for -mlong-double-64 [22403] localedata: Slash needs escaping in some locales [22408] malloc: malloc_info access heaps without arena lock, ignores heaps [22409] network: res_hnok does not accept some host names used on the Internet [22412] network: res_dnok, res_hnok should perform syntax checks [22413] network: ns_name_pton ignores syntactically invalid trailing backslash [22415] stdio: setvbuf can lead to invalid free/segfault [22432] build: Non-deterministic build [22439] malloc: malloc_info should compute summary statistics for all sub- heaps in an arena [22442] network: if_nametoindex could report index for the wrong networking interface [22446] build: aliasing violation calling readlink in handle_request [22447] build: unsafe call to strlen with a non-string in getlogin_r.c [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to __nscd_hash/__nss_hash [22463] network: p_secstodate overflow handling [22469] localedata: pl_PL LC_COLLATE does not use i18n [22478] libc: sigwait can fail with EINTR [22505] libc: ldconfig processes include directive in locale-specific order [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1" [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1" [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1" [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1" [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1" [22534] localedata: Collation rules for Serbian and Bosnian should be the same as for Croatian [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf) [22577] libc: missing newline after "cannot allocate TLS data structures for initial thread" [22588] manual: manual/conf.texi: missing underscore in front of SC_SSIZE_MAX [22593] math: nextafter and nexttoward are declared with const attribute [22596] manual: manual: finite(nan) wrongly described as returning nonzero [22603] string: ia64 memchr overflows internal pointer check [22605] libc: SH clone does not set the exit code correctly [22606] dynamic-link: Incorrect array size computation in _dl_init_paths (CVE-2017-1000408) [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409) [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be modified in case of success [22614] build: gcc: error: unrecognized command line option ‘-no-pie’ [22615] manual: manual: ambiguous wording about errno value in case of success [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable- stack-protector=all [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID binaries or if /proc is not mounted (CVE-2017-16997) [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice [22630] build: $(no-pie-ldflag) is no longer effective [22631] math: [m68k] Bad const attributes in bits/mathinline.h [22635] nptl: pthread_self returns NULL before libpthread is loaded [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64 [22637] nptl: guard size is subtracted from thread stack size instead of adding it on top [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha [22657] localedata: hu_HU: Avoid double space in date [22660] math: fmax, fmin sNaN handling on alpha [22664] libc: New warning of GCC8 [22665] math: alpha: ceil and floor raise inexact exceptions [22666] math: alpha: trunc raise inexact exceptions [22667] libc: makecontext lacks stack alignment on i386 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines [22679] libc: getcwd(3) can succeed without returning an absolute path (CVE-2018-1000001) [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock- elision and tunables [22687] math: [powerpc-nofpu] complex long double functions spurious "invalid" exception [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid" exception [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit power4 [22701] nis: Incomplete removal of libnsl [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact" [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE. [22715] dynamic-link: FAIL: elf/tst-audit10 [22719] libc: Backtrace tests fail on hppa [22742] libc: [aarch64] mcontext_t __reserved field got renamed [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd [22765] crypt: (struct crypt_data *data)->initialized is not set to zero before the first call to crypt_r () in crypt/badsalttest.c Version 2.26 Major new features: * A per-thread cache has been added to malloc. Access to the cache requires no locks and therefore significantly accelerates the fast path to allocate and free small amounts of memory. Refilling an empty cache requires locking the underlying arena. Performance measurements show significant gains in a wide variety of user workloads. Workloads were captured using a special instrumented malloc and analyzed with a malloc simulator. Contributed by DJ Delorie with the help of Florian Weimer, and Carlos O'Donell. * Unicode 10.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 10.0.0, using generator scripts contributed by Mike FABIAN (Red Hat). These updates cause user visible changes, especially the changes in wcwidth for many emoji characters cause problems when emoji sequences are rendered with pango, see for example: https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5 * Collation of Hungarian has been overhauled and is now consistent with "The Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by Egmont Koblinger. * Improvements to the DNS stub resolver, contributed by Florian Weimer: - The GNU C Library will now detect when /etc/resolv.conf has been modified and reload the changed configuration. The new resolver option “no-reload” (RES_NORELOAD) disables this behavior. - The GNU C Library now supports an arbitrary number of search domains (configured using the “search” directive in /etc/resolv.conf); previously, there was a hard limit of six domains. For backward compatibility, applications that directly modify the ‘_res’ global object are still limited to six search domains. - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C Library will now randomly pick a name server from the configuration as a starting point. (Previously, the second name server was always used.) * The tunables feature is now enabled by default. This allows users to tweak behavior of the GNU C Library using the GLIBC_TUNABLES environment variable. * New function reallocarray, which resizes an allocated block (like realloc) to the product of two sizes, with a guaranteed clean failure upon integer overflow in the multiplication. Originally from OpenBSD, contributed by Dennis Wölfing and Rüdiger Sonderfeld. * New wrappers for the Linux-specific system calls preadv2 and pwritev2. These are extended versions of preadv and pwritev, respectively, taking an additional flags argument. The set of supported flags depends on the running kernel; full support currently requires kernel 4.7 or later. * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to create a new session ID for the spawned process. This feature is scheduled to be added to the next major revision of POSIX; for the time being, it is available under _GNU_SOURCE. * errno.h is now safe to use from C-preprocessed assembly language on all supported operating systems. In this context, it will only define the Exxxx constants, as preprocessor macros expanding to integer literals. * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy, Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers. To compile programs that use this feature, the compiler must support 128-bit floating point with the type name _Float128 (as defined by TS 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__ must be defined to make the new interfaces visible. The new functions and macros correspond to those present for other floating-point types (except for a few obsolescent interfaces not supported for the new type), with F128 or f128 suffixes; for example, strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no printf or scanf formats for the new type; the strfromf128 and strtof128 interfaces should be used instead. Deprecated and removed features, and other changes affecting compatibility: * The synchronization that pthread_spin_unlock performs has been changed to now be equivalent to a C11 atomic store with release memory order to the spin lock's memory location. Previously, several (but not all) architectures used stronger synchronization (e.g., containing what is often called a full barrier). This change can improve performance, but may affect odd fringe uses of spin locks that depend on the previous behavior (e.g., using spin locks as atomic variables to try to implement Dekker's mutual exclusion algorithm). * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been removed. * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers will only be built and installed when the GNU C Library is configured with --enable-obsolete-rpc. This allows alternative RPC implementations, such as TIRPC or rpcsvc-proto, to be used. * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and libnss_compat, are deprecated, and will not be built or installed by default. The NIS(+) support library, libnsl, is also deprecated. By default, a compatibility shared library will be built and installed, but not headers or development libraries. Only a few NIS-related programs require this library. (In particular, the GNU C Library has never required programs that use 'gethostbyname' to be linked with libnsl.) Replacement implementations based on TIRPC, which additionally support IPv6, are available from . The configure option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+) name service modules, to be built and installed. * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC support is enabled, the configured recursive resolver must support EDNS. (Responding to EDNS-enabled queries with responses which are not EDNS-enabled is fine, but FORMERR responses are not.) * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS servers have not supported this opcode for a long time. * The _res_opcodes variable has been removed from libresolv. It had been exported by accident. * no longer includes inline versions of any string functions, as this kind of optimization is better done by the compiler. The macros __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect. * The nonstandard header has been removed. Most programs should use instead. If you have a specific need for the definition of locale_t with no other declarations, please contact libc-alpha@sourceware.org and explain. * The obsolete header has been removed. * The obsolete signal constant SIGUNUSED is no longer defined by . * The obsolete function cfree has been removed. Applications should use free instead. * The stack_t type no longer has the name struct sigaltstack. This changes the C++ name mangling for interfaces involving this type. * The ucontext_t type no longer has the name struct ucontext. This changes the C++ name mangling for interfaces involving this type. * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no longer has the name struct mcontext. On SPARC GNU/Linux, the struct mc_fq, struct rwindow, struct fpq and struct fq types are no longer defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct mc_fpu, the gwindows_t type no longer has the name struct gwindows and the fpregset_t type no longer has the name struct fpu. This changes the C++ name mangling for interfaces involving those types. * On S/390 GNU/Linux, the constants defined by have been synced with the kernel: - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS are not supported on this architecture and have been removed. - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA, PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE, PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added. Programs that assume the GET/SETREGS ptrace requests are universally available will now fail to build, instead of malfunctioning at runtime. Changes to build and runtime requirements: * Linux kernel 3.2 or later is required at runtime, on all architectures supported by that kernel. (This is a change from version 2.25 only for x86-32 and x86-64.) * GNU Binutils 2.25 or later is now required to build the GNU C Library. * On most architectures, GCC 4.9 or later is required to build the GNU C Library. On powerpc64le, GCC 6.2 or later is required. Older GCC versions and non-GNU compilers are still supported when compiling programs that use the GNU C Library. (We do not know exactly how old, and some GNU extensions to C may be _de facto_ required. If you are interested in helping us make this statement less vague, please contact libc-alpha@sourceware.org.) Security related changes: * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes, to avoid fragmentation-based spoofing attacks (CVE-2017-12132). * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE mode to guard against local privilege escalation attacks (CVE-2017-1000366). * Avoid printing a backtrace from the __stack_chk_fail function since it is called on a corrupt stack and a backtrace is unreliable on a corrupt stack (CVE-2010-3192). * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been fixed (CVE-2017-12133). The following bugs are resolved with this release: [984] network: Respond to changed resolv.conf in gethostbyname [5010] network: sunrpc service cleanup causes unwanted port mapper traffic [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt fields [12189] libc: __stack_chk_fail should not attempt a backtrace (CVE-2010-3192) [14096] time: Race condition on timezone/tst-timezone.out [14172] localedata: az_IR: new locale [14995] build: glibc fails to build if gold is the default linker, even if ld.bfd is available [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE [16637] network: inet_pton function is accepting IPv6 with bad format [16640] string: string/strtok.c: undefined behaviour inconsistent between x86 and other generic code [16875] localedata: ko_KR: fix lang_name [17225] localedata: ar_SY: localized month names for May and June are incorrect [17297] localedata: da_DK: wrong date_fmt string [18907] stdio: Incorrect order of __wur __THROW in [18934] localedata: hu_HU: collate: fix multiple bugs and add tests [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE) [19066] localedata: ar_SA abbreviated day and month names are in English [19569] network: resolv: Support an arbitrary number of search domains [19570] network: Implement random DNS server selection in the stub resolver [19838] locale: localedef fails on PA-RISC [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting order of 0D36 and 0D37 [19922] localedata: iso14651_t1_common: Define collation for Malayalam chillu characters [20098] libc: FAIL: debug/backtrace-tst on hppa [20257] network: sunrpc: clntudp_call does not enforce timeout when receiving data [20275] localedata: locale day/abday/mon/abmon should not have trailing whitespace [20313] localedata: Update locale data to Unicode 9.0 [20424] manual: Document how to provide a malloc replacement [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr) for Peru [20686] locale: Add el_GR@euro to SUPPORTED. [20831] dynamic-link: _dl_map_segments does not test for __mprotect failures consistently [21015] dynamic-link: Document and fix --enable-bind-now [21016] nptl: pthread_cond support is broken on hppa [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit- frame-pointer on i386 [21049] libc: segfault in longjmp_chk() due to clobbered processor register [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S [21088] libc: Build fails with --enable-static-nss [21094] math: cosf(1.57079697) has 3 ulp error on targets where the generic c code is used [21109] libc: Tunables broken on big-endian [21112] math: powf has large ulp errors with base close to 1 and exponent around 4000 [21115] network: sunrpc: Use-after-free in error path in clntudp_call (CVE-2017-12133) [21120] malloc: glibc malloc is incompatible with GCC 7 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking with -lieee [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1 (-0.0) when linking with -lieee [21171] math: log10, log2 and lgamma return incorrect results [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686 [21207] localedata: ce_RU: update weekdays from CLDR [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries [21217] localedata: Update months from CLDR-31 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking [21243] libc: support_delete_temp_file should issue warning for failed remove() [21244] libc: support resolv_test_start() socket fd close should be checked for errors. [21253] libc: localedef randomly segfaults when using -fstack-check due to new posix_spawn implementation [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt leads to lower CPU frequency [21259] libc: [alpha] termios.h missing IXANY for POSIX [21261] libc: [sparc64] bits/setjmp.h namespace [21267] network: [mips] bits/socket.h IOC* namespace [21268] libc: [alpha] termios.h NL2, NL3 namespace [21270] libc: mmap64 silently truncates large offset values [21275] libc: posix_spawn always crashes on ia64 now [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older [21280] math: [powerpc] logbl for POWER7 return incorrect results [21289] libc: Incorrect declaration for 32-bit platforms with _FILE_OFFSET_BITS=64 causes build error [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does not support gethostbyname4_r [21298] nptl: rwlock can deadlock on frequent reader/writer phase switching [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of arenas [21340] libc: Support POSIX_SPAWN_SETSID [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer [21359] network: ns_name_pack needs additional byte in destination buffer [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard against fragmentation attacks (CVE-2017-12132) [21369] network: resolv: Remove EDNS fallback [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE and _POSIX_C_SOURCE [21386] nptl: Assertion in fork for distinct parent PID is incorrect [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features [21393] stdio: Missing dup3 error check in freopen, freopen64 [21396] libc: Use AVX2 memcpy/memset on Skylake server [21399] localedata: Bad description for U00EC in localedata/charmaps/CP1254 [21411] malloc: realloc documentation error [21426] network: sys/socket.h uio.h namespace [21428] libc: [aarch64] tst-backtrace5 testsuite failure [21445] libc: signal.h bsd_signal namespace [21455] network: Network headers stdint.h namespace [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for retry value [21475] network: resolv: Overlong search path is truncated mid-label [21511] libc: sigstack namespace [21512] libc: clone() ends up calling exit_group() through _exit() wrapper [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error: bits/syscall.h: No such file or directory [21517] libc: struct sigaltstack namespace [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so [21533] localedata: Update locale data to Unicode 10.0 [21537] libc: ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error: junk at end of line, first unrecognized character is `@' [21538] libc: SIG_HOLD missing for XPG4 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS. [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN) [21543] libc: sigevent namespace [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong size for general purpose registers in mcontext_t structure [21550] libc: sigwait namespace [21552] libc: XPG4 bsd_signal namespace [21554] libc: sigpause namespace [21560] libc: sys/wait.h signal.h namespace [21561] libc: waitid namespace [21573] nptl: GCC 7: /usr/bin/install: cannot remove '/usr/include/stdlib.h': Permission denied [21575] libc: sys/wait.h missing struct rusage definition [21584] libc: sigaltstack etc namespace [21597] libc: siginterrupt namespace [21607] math: hppa: FAIL: math/test-tgmath [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI issue on x86-64 [21622] libc: [tile] missing SA_* for POSIX.1:2008 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias stack and heap (CVE-2017-1000366) [21625] libc: wait3 namespace [21654] nss: Incorrect pointer alignment in NSS group merge result construction [21657] network: Parse interface zone id for node-local multicast [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for between_2_3 [21666] libc: .symver is used on common symbol [21668] network: resolv: res_init cross-thread broadcast introduces race conditions [21687] math: tgmath.h totalorder, totalordermag return type [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji Hindi Locale [21696] libc: Incorrect assumption of of __cpu_mask in posix/sched_cpucount.c [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ? [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES] locale [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval, leading to relocation crash [21709] libc: resolv_conf.c:552: update_from_conf: Assertion `resolv_conf_matches (resp, conf)' failed. [21710] localedata: Added Samoan language locale for Samoa [21711] localedata: Pashto yesstr/nostr locale are missing [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’ [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari [21723] localedata: yesstr/nostr missing for Chinese language locale [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES] locale [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES] locale [21728] localedata: New Locale for Tongan language [21729] localedata: incorrect LC_NAME fields for hi_IN [21733] localedata: yesstr and nostr are missing for zh_HK [21734] localedata: Missing yesstr and nostr are for kw_GB [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a [21742] libc: _dl_num_cache_relocations is undefined in libc.a [21743] localedata: ks_IN@devanagari: abday strings mismatch the day strings [21744] libc: Tests failing on --enable-tunables --enable-stack- protector=all [21749] localedata: Wrong abbreviated day name (“abday”) for ar_JO/ar_LB/ar_SY [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW [21759] localedata: missing yesstr and nostr for Tigrinya [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN [21766] localedata: Wrong LC_MESSAGES for om_ET Locale [21767] localedata: Missing Bislama locales [21768] localedata: Missing yesstr and nostr for aa_ET [21770] localedata: Missing Field in li_NL [21778] nptl: Robust mutex may deadlock [21779] libc: MicroBlaze segfaults when loading libpthread [21783] localedata: Fix int_select international_call_prefixes [21784] localedata: Inconsistency in country_isbn [21788] localedata: Missing Country Postal Abbreviations [21794] localedata: Added-country_isbn-for-Italy [21795] localedata: Add/Fix country_isbn for France [21796] localedata: Added country_isbn for Republic of Korea [21797] localedata: Fix inconsistency in country_isbn and missing prefixes [21799] localedata: Added int_select international_call_prefixes [21801] localedata: Added int_select international_call_prefixes [21804] nptl: Double semicolon in thread-shared-types.h [21807] localedata: LC_ADDRESS fix for pap_CW [21808] localedata: Fix LC_ADDRESS for pap_AW [21821] localedata: Added country_name in mai_IN [21822] localedata: Fix LC_TIME for mai_IN [21823] localedata: missing yesstr, nostr for sa_IN [21825] localedata: Fix name_mrs for mag_IN [21828] localedata: 2.26 changelog should mention user visible changes with unicode 9.0 [21835] localedata: Added Maithili language locale for Nepal [21838] localedata: Removed redundant data for the_NP [21839] localedata: Fix LC_MONETARY for ta_LK [21844] localedata: Fix Latin characters and Months Sequence. [21848] localedata: Fix mai_NP Title Name Version 2.25 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR 24731-2:2010, is supported to enable declarations of functions from that TR. Note that not all functions from that TR are supported by the GNU C Library. * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS 18661-1:2014, is supported to enable declarations of functions and macros from that TS. Note that not all features from that TS are supported by the GNU C Library. * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS 18661-4:2015, is supported to enable declarations of functions and macros from that TS. Note that most features from that TS are not supported by the GNU C Library. * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L. Since the GNU C Library defaults to a much newer revision of POSIX, this will only affect programs that specifically request an old conformance mode. For instance, a program compiled with -std=c89 -D_REENTRANT will see a change in the visible declarations, but a program compiled with just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT, will not. Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be defined by all multithreaded code, but glibc has not required this for many years. * The inclusion of by is deprecated. This means that in a future release, the macros “major”, “minor”, and “makedev” will only be available from . These macros are not part of POSIX nor XSI, and their names frequently collide with user code; see for instance glibc bug 19239 and Red Hat bug 130601. includes under _GNU_SOURCE, and C++ code presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the problem. * New features from TS 18661-1:2014 are added to libm: the fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros. * Integer width macros from TS 18661-1:2014 are added to : CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH, UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to : INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH, INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH, UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH, INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH, UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH, UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH, UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH, UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH, WINT_WIDTH. * New features are added from TS 18661-1:2014: - Signaling NaN macros: SNANF, SNAN, SNANL. - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp, fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf, fromfpxl, ufromfpx, ufromfpxf, ufromfpxl. - llogb functions: the llogb, llogbf and llogbl functions, and the FP_LLOGB0 and FP_LLOGBNAN macros. - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag, fminmagf, fminmagl. - Comparison macros: iseqsig. - Classification macros: iscanonical, issubnormal, iszero. - Total order functions: totalorder, totalorderf, totalorderl, totalordermag, totalordermagf, totalordermagl. - Canonicalize functions: canonicalize, canonicalizef, canonicalizel. - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload, setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl. * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014, are added to libc. They convert a floating-point number into string. * Most of glibc can now be built with the stack smashing protector enabled. It is recommended to build glibc with --enable-stack-protector=strong. Implemented by Nick Alcock (Oracle). * The function explicit_bzero, from OpenBSD, has been added to libc. It is intended to be used instead of memset() to erase sensitive data after use; the compiler will not optimize out calls to explicit_bzero even if they are "unnecessary" (in the sense that no _correct_ program can observe the effects of the memory clear). * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined to float instead of double. This does not affect the ABI of any libraries that are part of the GNU C Library, but may affect the ABI of other libraries that use this type in their interfaces. * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the float_t and double_t types are now defined to long double instead of float and double. These options are not the default, and this does not affect the ABI of any libraries that are part of the GNU C Library, but it may affect the ABI of other libraries that use this type in their interfaces, if they are compiled or used with those options. * The getentropy and getrandom functions, and the header file have been added. * The buffer size for byte-oriented stdio streams is now limited to 8192 bytes by default. Previously, on Linux, the default buffer size on most file systems was 4096 bytes (and thus remains unchanged), except on network file systems, where the buffer size was unpredictable and could be as large as several megabytes. * The header now includes the header. Support for the Linux quota interface which predates kernel version 2.4.22 has been removed. * The malloc_get_state and malloc_set_state functions have been removed. Already-existing binaries that dynamically link to these functions will get a hidden implementation in which malloc_get_state is a stub. As far as we know, these functions are used only by GNU Emacs and this change will not adversely affect already-built Emacs executables. Any undumped Emacs executables, which normally exist only during an Emacs build, should be rebuilt by re-running “./configure; make” in the Emacs build tree. * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the corresponding RES_NOIP6DOTINT flag from have been removed. “no-ip6-dotint” had already been the default, and support for the “ip6-dotint” option was removed from the Internet in 2006. * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING flag from have been removed. The option relied on a backwards-incompatible DNS extension which was never deployed on the Internet. * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG, RES_BLAST defined in the header file have been deprecated. They were already unimplemented. * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for _res.flags are deprecated. The flag was standardized in RFC 2133, but removed again from the IETF name lookup interface specification in RFC 2553. Applications should use getaddrinfo instead. * DNSSEC-related declarations and definitions have been removed from the header file, and libresolv will no longer attempt to decode the data part of DNSSEC record types. Previous versions of glibc only implemented minimal support for the previous version of DNSSEC, which is incompatible with the currently deployed version. * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p, ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the header file because the distinction between RR types and meta-RR types is not officially standardized, subject to revision, and thus not suitable for encoding in a macro. * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook and rhook members of the res_state type in have been removed. The glibc stub resolver did not support these hooks, but the header file did not reflect that. * For multi-arch support it is recommended to use a GCC which has been built with support for GNU indirect functions. This ensures that correct debugging information is generated for functions selected by IFUNC resolvers. This support can either be enabled by configuring GCC with '--enable-gnu-indirect-function', or by enabling it by default by setting 'default_gnu_indirect_function' variable for a particular architecture in the GCC source file 'gcc/config.gcc'. * GDB pretty printers have been added for mutex and condition variable structures in POSIX Threads. When installed and loaded in gdb these pretty printers show various pthread variables in human-readable form when read using the 'print' or 'display' commands in gdb. * Tunables feature added to allow tweaking of the runtime for an application program. This feature can be enabled with the '--enable-tunables' configure flag. The GNU C Library manual has details on usage and README.tunables has instructions on adding new tunables to the library. * A new version of condition variables functions have been implemented in the NPTL implementation of POSIX Threads to provide stronger ordering guarantees. * A new version of pthread_rwlock functions have been implemented to use a more scalable algorithm primarily through not using a critical section anymore to make state changes. Security related changes: * On ARM EABI (32-bit), generating a backtrace for execution contexts which have been created with makecontext could fail to terminate due to a missing .cantunwind annotation. This has been observed to lead to a hang (denial of service) in some Go applications compiled with gccgo. Reported by Andreas Schwab. (CVE-2016-6323) * The DNS stub resolver functions would crash due to a NULL pointer dereference when processing a query with a valid DNS question type which was used internally in the implementation. The stub resolver now uses a question type which is outside the range of valid question type values. (CVE-2015-5180) The following bugs are resolved with this release: [4099] stdio: Overly aggressive caching by stream i/o functions. [7065] build: Support building glibc with -fstack-protector or -fstack- protector-all [9842] localedata: en_CA: incorrect date format [13165] nptl: pthread_cond_wait() can consume a signal that was sent before it started waiting [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl [15765] nptl: sem_open is wrongly a cancellation point [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32 [16458] libc: endian.h and netinet/in.h byte order macros return values of wrong type [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a library linked with pthread [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix "FIXME: Ingo" issue) [16907] libc: compiled with --std=cXX disables __attribute__ [17252] libc: getrandom and getentropy syscall [17730] malloc: thread-local storage is sometimes improperly free()'d after being __libc_memalign()'d [18241] stdio: failed fseek on memstream does not set errno and can fail when it shouldnt [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is not [18463] nptl: pthread_cond_broadcast issue when surrounded by PTHREAD_PRIO_INHERIT mutex on ARM [18784] network: res_query and related function crash for special record type queries (CVE-2015-5180) [19380] math: strtod does not raise "inexact" [19387] string: Integer overflow in memchr [19390] string: Integer overflow in strncat [19398] build: linknamespace tests fail with massively parallel build [19402] nptl: Deadlock with robust shared mutex and asynchronous termination [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests [19473] malloc: Turn malloc_get_state etc. in compatibility symbols [19514] libc: [PATCH] Fix spelling errors in spelling "implement"/"implementation" in several places [19582] network: Deprecate RES_USE_INET6 [19673] manual: clog10 docs appear to be erroneous [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE causes a segmentation fault [19826] libc: invalid pointer returned from __tls_get_addr with static linking [20016] network: resolv: Remove hooks support from the API [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to uninitialized GOT [20033] math: [x86_64] vectorized math function don't call the __finite versions [20116] nptl: use after free in pthread_create [20181] stdio: open_memstream(): writes not at end of stream corrupt data [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object is always true. [20311] nptl: please install proc_service.h [20366] libc: Compilation errors in installed headers in strict-compliance modes [20370] malloc: malloc: Arena free list management is still racy (incorrect fix in bug 19243) [20386] libc: assert (X = 0) does not result in GCC warning [20432] malloc: malloc: Minimize interface required for interposition [20435] libc: Missing unwind info in __startcontext causes infinite loop in _Unwind_Backtrace (CVE-2016-6323) [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking libpthread.a [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value [20477] network: resolv: incorrect double-checked locking related to _res_hconf [20478] libc: libc_ifunc macro and similar usages leads to false debug- information. [20495] math: x86_64 performance degradation due to AVX/SSE transition penalty [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512 cause transition penalty [20517] math: sparcv9 missing fdiml compat symbol [20524] manual: strverscmp is inconsistent [20525] libc: should be based on kernel headers [20539] math: GCC 7 -static -lm fails to link at -O3 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc- mcount.oS) [20558] string: POSIX bcopy/bzero decls do not implement Object Size Checking [20591] network: Remove obsolete DNSSEC support [20592] network: DNS resource record type classification macros in are incorrect [20593] network: Update DNS RR type definitions [20611] network: getaddrinfo accepts invalid numeric scope IDs [20615] build: glibc build fails when using --with-cpu=power9 --enable- multi-arch [20629] network: libresolv: Remove support for bitstring labels (RES_USEBSTRING) [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to assertion: "maxidx >= 2" [20660] math: [arm] Use VSQRT [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable) [20689] libc: Test for FMA should also check for AVX. [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS [20715] math: iszero macro breaks existing code [20718] math: [powerpc] copysignl raises "invalid" for sNaN [20728] libc: powerpc: Missing TOC stub in clone [20729] build: glibc-2.24 fails to build for i486 with -Os [20750] build: Build fails with default PIE enabled gcc-6.x [20768] math: [alpha] sqrt fegetenv namespace [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in glibc [20787] math: float_t is defined as float incorrectly on x86_64 even if __FLT_EVAL_METHOD__ is 2 [20790] network: rpcgen buffer overrun in get_prog_declaration [20822] nptl: race condition in __lll_unlock_elision on powerpc [20829] libc: crypt snprintf namespace [20847] libc: tst-vfork3 failure [20855] math: Default bits/mathdef.h has inappropriate float_t [20859] math: [sh4] FP_ILOGB0 invalid [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80, U+20AC), not same as GBK [20915] dynamic-link: global-dynamic TLS broken on aarch64 [20916] math: pow handling of sNaN arguments [20918] build: Building with --enable-nss-crypt fails tst-linkall-static. [20919] math: Bad pow (qNaN, 0) result with -lieee [20940] math: hypot sNaN handling [20947] math: fmax, fmin sNaN handling [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with RES_USE_INET6 [20971] string: powerpc64/power7 memchr overflows internal pointer check [20973] nptl: robust mutexes: Lost wake-ups [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character [20978] nis: strlen on null pointer in nss_nisplus [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on wrong condition [21014] string: i686 memchr overflows internal pointer check [21019] libc: [mips] n32 lseek incorrect on overflow [21022] libc: [microblaze] __backtrace get_frame_size namespace [21026] libc: [MIPS] readahead syscall is broken on n64 [21028] math: Fallback fesetexceptflag should always succeed [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by clang [21053] libc: [SH] Namespace pollution from sys/ucontext.h [21061] librt: [microblaze] librt lost clock_* exports [21073] libc: tunables: insecure environment variables passed to subprocesses with AT_SECURE [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S Version 2.24 * The minimum Linux kernel version that this version of the GNU C Library can be used with is 3.2, except on i[4567]86 and x86_64, where Linux kernel version 2.6.32 or later suffices (on architectures that already required kernel versions more recent than 3.2, those requirements remain unchanged). Linux 3.2 or later kernel headers are required on all architectures. * The pap_AN locale has been deleted. This has been deprecated for a long time. It has been replaced by pap_AW & pap_CW, both of which have long been included in previous releases. * The readdir_r and readdir64_r functions have been deprecated. It is recommended to use readdir and readdir64 instead. * The type “union wait” has been removed. It was deprecated in the early 1990s and never part of POSIX. Application code should use the int type instead of “union wait”. * A new NSS action is added to facilitate large distributed system administration. The action, MERGE, allows remote user stores like LDAP to be merged into local user stores like /etc/groups in order to provide easy to use, updated, and managed sets of merged credentials. The new action can be used by configuring it in /etc/nsswitch.conf: group: files [SUCCESS=merge] nis Implemented by Stephen Gallagher (Red Hat). * The deprecated __malloc_initialize_hook variable has been removed from the API. * The long unused localedef --old-style option has been removed. It hasn't done anything in over 16 years. Scripts using this option can safely drop it. * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions return the next representable value in the direction of positive infinity and the nextdown functions return the next representable value in the direction of negative infinity. These are currently enabled as GNU extensions. Security related changes: * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It could result in a stack overflow when getnetbyname was called with an overly long name. (CVE-2016-3075) * Previously, getaddrinfo copied large amounts of address data to the stack, even after the fix for CVE-2013-4458 has been applied, potentially resulting in a stack overflow. getaddrinfo now uses a heap allocation instead. Reported by Michael Petlan. (CVE-2016-3706) * The glob function suffered from a stack-based buffer overflow when it was called with the GLOB_ALTDIRFUNC flag and encountered a long file name. Reported by Alexander Cherepanov. (CVE-2016-1234) * The Sun RPC UDP client could exhaust all available stack space when flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez' alloca plugin for GCC. (CVE-2016-4429) * The IPv6 name server management code in libresolv could result in a memory leak for each thread which is created, performs a failing naming lookup, and exits. Over time, this could result in a denial of service due to memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417) The following bugs are resolved with this release: [1170] localedata: ne_NP: update Nepali locale definition file [3629] manual: stpcpy description in string.texi refers to MS-DOG instead of MS-DOS. [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC [6796] math: fdim() does not set errno on overflow [10354] libc: posix_spawn should use vfork() in more cases than presently [11213] localedata: localedata: add copyright disclaimer to locale files [12143] localedata: chr_US: new Cherokee locale [12450] localedata: sgs_LT: new locale [12676] localedata: ln_CD: new locale [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest CLDR data [13304] math: fma, fmaf, fmal produce wrong results [14259] build: --localedir arg to configure is ignored [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork? [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers [14934] localedata: es_CL: wrong first weekday chilean locale [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of romanisation [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0 and +/- [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales [15368] nptl: raise() is not async-signal-safe [15479] math: ceil, floor, round and trunc raise inexact exception [15578] localedata: kk_KZ: various updates [16003] localedata: pap_AN: punt old locale [16137] localedata: iw_IL: punt old locale [16190] localedata: eo: new esperanto locale [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro [16742] malloc: race condition: pthread_atfork() called before first malloc() results in unexpected locking behaviour/deadlocks [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in all locales [16983] localedata: postal_fmt does not allow %l and %n modifiers [17565] localedata: pt_PT: wrong (work-)week start [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD [17950] build: Build fails with -msse [18205] localedata: be_BY*: wrong first_weekday and first_workday [18433] libc: posix_spawn does not return correctly upon failure to execute [18453] localedata: charmaps/IBM875: incorrect codes [18712] string: bits/string2.h incompatible with -O2 -Werror=packed -Wsystem-headers [18896] localedata: he_IL: improvements for currency [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in Romanian locale data [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned symbol [19056] libc: Deprecate readdir_r [19133] localedata: pt_*: days & months should be lowercase in Portuguese language [19198] localedata: nl_NL: small improvements for Dutch locales [19257] network: Per-thread memory leak in __res_vinit with IPv6 nameservers (CVE-2016-5417) [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx machine [19400] locale: Language missing in "iso-639.def", trivial fix in description [19431] malloc: Deadlock between fflush, getdelim, and fork [19505] libc: Incorrect file descriptor validity checks in posix_spawn_file_actions_add{open,close,dup2} [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror when using RTLD_NEXT [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in `intl/{gettextP,loadinfo}.h' [19534] libc: execle, execlp may use malloc [19568] localedata: *_CH: Swiss locales have inconsistent start of week [19573] network: res_nclose and __res_maybe_init disagree about name server initialization, breaking Hesiod [19575] localedata: Status of GB18030 tables [19581] localedata: sr_* date_fmt string contains additional newline [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD Excavator core [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal double range [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low part zero incorrect [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in equality tests [19610] dynamic-link: ldconfig -X removes stale symbolic links [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others [19633] locale: strfmon_l applies global locale to number formatting [19642] network: Memory leak in getnameinfo [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA [19653] libc: Potential for NULL pointer dereference (CWE-476) in glibc-2.22 [19654] math: [x86_64] Need testcase for BZ #19590 fix [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' & 'tst-numeric.c' [19674] math: [ldbl-128ibm] powl incorrect overflow handling [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero low part [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero result [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to unaligned stack [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update pointers and lengths in error-case. [19727] locale: Converting from/to UTF-xx with iconv() does not always report errors on UTF-16 surrogates values. [19755] nscd: nscd assertion failure in gc [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64 [19759] libc: mempcpy shouldn't be inlined [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse [19765] libc: s390 needs an optimized mempcpy [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect NAME_MAX limit assumption (CVE-2016-1234) [19783] build: benchtests don't support --enable-hardcoded-path-in-tests [19787] network: Missing and incorrect truncation checks in getnameinfo [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding modes [19791] network: Assertion failure in res_query.c with un-connectable name server addresses [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext [19822] math: libm.so install clobbers old version [19825] network: resolv: send_vc can return uninitialized data in second response to getaddrinfo [19830] network: nss_dns: should check RDATA length against buffer length [19831] network: nss_dns: getaddrinfo returns uninitialized data when confronted with A/AAAA records of invalid size [19837] nss: nss_db: No retries for some long lines with a larger buffer [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP [19853] stdio: Printing IBM long double in decimal with high precision is sometimes incorrect [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b [19861] nptl: libpthread IFUNC resolver for fork can lead to crash [19862] network: resolv, nss_dns: Remove remaining logging of unexpected record types [19865] network: Assertion failure or memory leak in _nss_dns_getcanonname_r [19868] network: nss_dns: netent code does not skip over non-PTR records [19879] network: nss_dns: Stack overflow in getnetbyname implementation (CVE-2016-3075) [19881] string: Improve x86-64 memset [19907] string: Incorrect memcpy tests [19916] dynamic-link: S390: fprs/vrs are not saved/restored while resolving symbols [19925] libc: termios.h XCASE namespace [19928] string: memmove-vec-unaligned-erms.S is slow with large data size [19929] libc: limits.h NL_NMAX namespace [19931] stdio: Memory leak in vfprintf [19957] libc: clone(CLONE_VM) access invalid parent memory [19963] localedata: en_IL: New locale [19989] stdio: stdio.h cuserid namespace [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in gethosts [19996] locale: langinfo.h nl_langinfo_l namespace [20005] stdio: fflush on a file opened with fmemopen resets position to 0 [20010] network: getaddrinfo: Stack overflow in hostent translation (CVE-2016-3706) [20012] stdio: libio: fmemopen append mode failure [20014] stdio: stdio.h namespace for pre-threads POSIX [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate [20023] libc: fcntl.h timespec namespace [20024] math: [x86_64] vectorized sincos trashes the stack [20031] network: nss_hesiod: Heap overflow in get_txt_records [20041] time: sys/time.h timespec namespace [20043] libc: unistd.h missing cuserid for UNIX98 and before [20044] libc: unistd.h missing pthread_atfork for UNIX98 [20051] libc: ttyslot in wrong header under wrong conditions [20054] libc: gethostname not declared for XPG4 [20055] libc: termios.h missing tcgetsid for XPG4 [20072] dynamic-link: x86 init_cpu_features is called twice in static executable [20073] libc: sys/stat.h fchmod namespace [20074] libc: stdlib.h rand_r namespace [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for XPG3 [20111] libc: struct sockaddr_storage cannot be aggregate-copied [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call (CVE-2016-4429) [20115] string: Extra alignment in memset-vec-unaligned-erms.S [20119] libc: Wrong mask for processors level type from CPUID [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with AS not supporting AVX512 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for sNaN argument [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN argument [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid" [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input [20178] libc: posix_spawn{p} should not call exit [20191] stdio: libio: vtables hardening [20195] string: FMA4 detection requires CPUID execution with register eax=0x80000001 [20198] libc: quick_exit incorrectly destroys C++11 thread objects. [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative subnormals [20212] math: acos (sNaN) returns sNaN [20213] math: asin (sNaN) returns sNaN [20214] network: Linux header sync with linux/in6.h and ipv6.h again. [20218] math: [i386] asinhl (sNaN) returns sNaN [20219] math: [i386] atanhl (sNaN) returns sNaN [20222] stdio: fopencookie: Mangle function pointers [20224] math: [i386] cbrtl (sNaN) returns sNaN [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN input [20227] math: [i386/x86_64] logl (sNaN) returns sNaN [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN [20237] nss: nss_db: get*ent segfaults without preceding set*ent [20240] math: modf (sNaN) returns sNaN [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler [20250] math: frexp (sNaN) returns sNaN [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid" [20255] math: [i386] fdim, fdimf return with excess range and precision / double rounding [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array subscript is below array bounds [-Werror=array-bounds] [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND [20263] nptl: robust mutex deadlocks if other thread requests timedlock (Only arm/linux) [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap fallbacks [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing "invalid" exceptions [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1 [20316] localedata: id_ID: Februari instead of Pebruari [20327] string: POWER8 strcasecmp returns incorrect result [20347] math: Failure: Test: j0_downward (0xap+0) [20348] libc: FAIL: misc/tst-preadvwritev64 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64} [20350] libc: There is no test for p{read,write}64 [20357] math: Incorrect cos result for 1.5174239687223976 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines Version 2.23 * Unicode 8.0.0 Support: Character encoding, character type info, and transliteration tables are all updated to Unicode 8.0.0, using new and/or improved generator scripts contributed by Mike FABIAN (Red Hat). These updates cause user visible changes, such as the fixes for bugs 89, 16061, and 18568. * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the kernel-internal CPU set size. This means that requests that change the CPU affinity which failed before (for example, an all-ones CPU mask) will now succeed. Applications that need to determine the effective CPU affinities need to call sched_getaffinity or pthread_getaffinity_np after setting it because the kernel can adjust it (and the previous size check would not detect this in the majority of cases). * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS the following new symbols are used: fts64_children, fts64_close, fts64_open, fts64_read and fts64_set. * getaddrinfo now detects certain invalid responses on an internal netlink socket. If such responses are received, an affected process will terminate with an error message of "Unexpected error on netlink descriptor " or "Unexpected netlink response of size on descriptor ". The most likely cause for these errors is a multi-threaded application which erroneously closes and reuses the netlink file descriptor while it is used by getaddrinfo. * A defect in the malloc implementation, present since glibc 2.15 (2012) or glibc 2.10 via --enable-experimental-malloc (2009), could result in the unnecessary serialization of memory allocation requests across threads. The defect is now corrected. Users should see a substantial increase in the concurent throughput of allocation requests for applications which trigger this bug. Affected applications typically create and destroy threads frequently. (Bug 19048 was reported and analyzed by Ericsson.) * There is now a --disable-timezone-tools configure option for disabling the building and installing of the timezone related utilities (zic, zdump, and tzselect). This is useful for people who build the timezone data and code independent of the GNU C Library. * The obsolete header has been removed. Programs that require this header must be updated to use instead. * The obsolete functions bdflush, create_module, get_kernel_syms, query_module and uselib are no longer available to newly linked binaries; the header has been removed. These functions and header were specific to systems using the Linux kernel and could not usefully be used with the GNU C Library on systems with version 2.6 or later of the Linux kernel. * Optimized string, wcsmbs and memory functions for IBM z13. Implemented by Stefan Liebler. * Newly linked programs that define a variable called signgam will no longer have it set by the lgamma, lgammaf and lgammal functions. Programs that require signgam to be set by those functions must ensure that they use the variable provided by the GNU C Library and declared in , without defining their own copy. * The minimum GCC version that can be used to build this version of the GNU C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can still be used to compile programs using the GNU C Library. Security related changes: * An out-of-bounds value in a broken-out struct tm argument to strftime no longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776) * The LD_POINTER_GUARD environment variable can no longer be used to disable the pointer guard feature. It is always enabled. Previously, LD_POINTER_GUARD could be used to disable security hardening in binaries running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert. (CVE-2015-8777) * An integer overflow in hcreate and hcreate_r could lead to an out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778) * The catopen function no longer has unbounded stack usage. Reported by Max. (CVE-2015-8779) * The nan, nanf and nanl functions no longer have unbounded stack usage depending on the length of the string passed as an argument to the functions. Reported by Joseph Myers. (CVE-2014-9761) * A stack-based buffer overflow was found in libresolv when invoked from libnss_dns, allowing specially crafted DNS responses to seize control of execution flow in the DNS client. The buffer overflow occurs in the functions send_dg (send datagram) and send_vc (send TCP) for the NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC family. The use of AF_UNSPEC triggers the low-level resolver code to send out two parallel queries for A and AAAA. A mismanagement of the buffers used for those queries could result in the response of a query writing beyond the alloca allocated buffer created by _nss_dns_gethostbyname4_r. Buffer management is simplified to remove the overflow. Thanks to the Google Security Team and Red Hat for reporting the security impact of this issue, and Robert Holiday of Ciena for reporting the related bug 18665. (CVE-2015-7547) The following bugs are resolved with this release: [89] localedata: Locales nb_NO and nn_NO should transliterate æøå [887] math: Math library function "logb" and "nextafter" inconsistent [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1) [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1) [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1) [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better use `mkstemp' [4404] localedata: German translation of "Alarm clock" is misleading [6799] math: nextafter() and nexttoward() doen't set errno on overflow/underflow errors [6803] math: scalb(), scalbln(), scalbn() do not set errno on overflow/underflow [10432] nis: _nss_nis_setnetgrent assertion failure [11460] libc: fts has no LFS support [12926] network: getaddrinfo()/make_request() may spin forever [13065] nptl: Race condition in pthread barriers [13690] nptl: pthread_mutex_unlock potentially cause invalid access [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A} are not contiguous [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double [14912] libc: Rename non-installed bits/*.h headers [15002] libc: Avoid undefined behavior in posix_fallocate overflow check [15367] math: Let gcc use __builtin_isinf [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c [15421] math: lgamma wrongly sets signgam for ISO C [15470] math: [arm] On ARM llrintl() and llroundl() do not raise FE_INVALID with argument out of range [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear all exceptions [15786] dynamic-link: ifunc resolver functions can smash function arguments [15918] math: Unnecessary check for equality in hypotf() [16061] localedata: Review / update transliteration data [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they should include [16141] time: strptime %z offset restriction [16171] math: drem should be alias of remainder [16296] math: fegetround is pure? [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable. [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on GNU/Linux [16399] math: [mips] lrint / llrint / lround / llround missing exceptions [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive arguments [16422] math: [powerpc] math-float, math-double failing llrint tests with "Exception "Inexact" set" on ppc32 [16495] localedata: nl_NL: date_fmt: shuffle year/month around [16517] math: Missing underflow exception from tanf/tan/tanl [16519] math: Missing underflow exception from sinhf [16520] math: Missing underflow exception from tanhf [16521] math: Missing underflow exception from exp2 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed rounding results [16734] stdio: fopen calls mmap to allocate its buffer [16961] math: nan function incorrect handling of bad sequences [16962] math: nan function unbounded stack allocation (CVE-2014-9761) [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2 [16985] locale: localedef: confusing error message when opening output fails [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value [17197] locale: Redundant shift character in iconv conversion output at block boundary [17243] libc: trunk/posix/execl.c:53: va_args problem ? [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ? [17250] dynamic-link: static linking breaks nss loading (getaddrinfo/getpwnam/etc...) [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before 4.7? [17441] math: isnan() should use __builtin_isnan() in GCC [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock (related to lock elision) [17787] manual: Exponent on page 324 of the PDF ends prematurely [17886] time: strptime should be able to parse "Z" as a timezone with %z [17887] time: strptime should be able to parse "+01:00" style timezones [17905] libc: catopen() Multiple unbounded stack allocations (CVE-2015-8779) [18084] libc: backtrace (..., 0) dumps core on x86 [18086] libc: nice() sets errno to 0 on success [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count is too large (CVE-2015-8778) [18251] dynamic-link: SONAME missing when audit modules provides path [18265] libc: add attributes for wchar string and memory functions [18370] math: csqrt missing underflows [18421] libc: [hppa] read-only segment has dynamic relocations [18472] libc: Obsolete syscall wrappers should be compat symbols [18480] libc: hppa glibc miscompilation in sched_setaffinity() [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates [18525] localedata: Remove locale timezone information [18560] libc: [powerpc] spurious bits/ipc.h definitions [18568] localedata: Update locale data to Unicode 8.0 [18589] locale: sort-test.sh fails at random [18595] math: ctan, ctanh missing underflows [18604] libc: assert macro-expands its argument [18610] math: S390: fetestexcept() reports any exception if DXC-code contains a vector instruction exception. [18611] math: j1, jn missing errno setting on underflow [18618] localedata: sync Chechen locale definitions with other *_RU locales [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes [18665] network: In send_dg, the recvfrom function is NOT always using the buffer size of a newly created buffer (CVE-2015-7547) [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible missing break ? [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for 32bit processes [18681] libc: regexp.h is obsolete and buggy, and should be desupported [18699] math: tilegx cproj() for various complex infinities does not yield infinity [18724] libc: Harden put*ent functions against data injection [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision [18755] build: build errors with -DNDEBUG [18757] stdio: fmemopen fails to set errno on failure [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to be forced unloaded [18781] libc: openat64 lacks O_LARGEFILE [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6: error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’ [18789] math: [ldbl-128ibm] sinhl inaccurate near 0 [18790] math: [ldbl-128ibm] tanhl inaccurate [18795] libc: stpncpy fortification misses buffer lengths that are statically too large [18796] build: build fails for --disable-mathvec [18803] math: hypot missing underflows [18820] stdio: fmemopen may leak memory on failure [18823] math: csqrt spurious underflows [18824] math: fma spurious underflows [18825] math: pow missing underflows [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior [18870] build: sem_open.c fails to compile with missing symbol FUTEX_SHARED [18872] stdio: Fix memory leak in printf_positional [18873] libc: posix_fallocate overflow check ineffective [18875] math: Excess precision leads incorrect libm [18877] libc: arm: mmap offset regression [18887] libc: memory corruption when using getmntent on blank lines [18918] localedata: hu_HU: change time to HH:MM:SS format [18921] libc: Regression: extraneous stat() and fstat() performed by opendir() [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged binaries (CVE-2015-8777) [18951] math: tgamma missing underflows [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect signgam [18953] localedata: lt_LT: change currency symbol to the euro [18956] math: powf inaccuracy [18961] math: [i386] exp missing underflows [18966] math: [i386] exp10 missing underflows [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb) [18969] build: multiple string test failures due to missing locale dependencies [18970] libc: Reference of pthread_setcancelstate in libc.a [18977] math: float / long double Bessel functions not in XSI POSIX [18980] math: i386 libm functions return with excess range and precision [18981] math: i386 scalb*, ldexp return with excess range and precision [18982] stdio: va_list and vprintf [18985] time: Passing out of range data to strftime() causes a segfault (CVE-2015-8776) [19003] math: [x86_64] fma4 version of pow inappropriate contraction [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26 [19012] locale: iconv_open leaks memory on error path [19016] math: clog, clog10 inaccuracy [19018] nptl: Mangle function pointers in tls_dtor_list [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling [19048] malloc: malloc: arena free list can become cyclic, increasing contention [19049] math: [powerpc] erfc incorrect zero sign [19050] math: [powerpc] log* incorrect zero sign [19058] math: [x86_64] Link fail with -fopenmp and -flto [19059] math: nexttoward overflow incorrect in non-default rounding modes [19071] math: ldbl-96 lroundl incorrect just below powers of 2 [19074] network: Data race in _res_hconf_reorder_addrs [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default rounding modes [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for ILP32 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long [19086] manual: posix_fallocate64 documented argument order is wrong. [19088] math: lround, llround missing exceptions close to overflow threshold [19094] math: lrint, llrint missing exceptions close to overflow threshold [19095] math: dbl-64 lrint incorrect for 64-bit long [19122] dynamic-link: Unnecessary PLT relocations in librtld.os [19124] dynamic-link: ld.so failed to build with older assmebler [19125] math: [powerpc32] llroundf, llround incorrect exceptions [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash [19134] math: [powerpc32] lround, lroundf spurious exceptions [19137] libc: i386/epoll_pwait.S doesn't support cancellation [19143] nptl: Remove CPU set size checking from sched_setaffinity, pthread_setaffinity_np [19156] math: [ldbl-128] j0l spurious underflows [19164] nptl: tst-getcpu fails with many possible CPUs [19168] math: math/test-ildoubl and math/test-ldouble failure [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly. [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses prelink [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv (FE_NOMASK_ENV) do not clear SSE exceptions [19182] malloc: malloc deadlock between ptmalloc_lock_all and _int_new_arena/reused_arena [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception [19201] math: dbl-64 remainder incorrect sign of zero result [19205] math: bits/math-finite.h conditions do not match math.h and bits/mathcalls.h [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn [19211] math: lgamma functions do not set signgam for -ffinite-math-only for C99-based standards [19212] libc: features.h not -Wundef clean [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite- math-only [19214] libc: Family and model identification for AMD CPU's are incorrect. [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps disabled [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious "inexact" exceptions [19238] math: [powerpc] round, roundf spurious "inexact" for integer arguments [19242] libc: strtol incorrect in Turkish locales [19243] malloc: reused_arena can pick an arena on the free list, leading to an assertion failure and reference count corruption [19253] time: tzset() ineffective when temporary TZ did not include DST rules [19266] math: strtod ("NAN(I)") incorrect in Turkish locales [19270] math: [hppa] Shared libm missing __isnanl [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing MAP_HUGETLB and MAP_STACK defines [19313] nptl: Wrong __cpu_mask for x32 [19347] libc: grantpt: try to force a specific gid even without pt_chown [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments [19350] math: [ldbl-128ibm] sinhl spurious overflows [19351] math: [ldbl-128ibm] logl inaccurate near 1 [19363] time: x32: times() return value wrongly truncates/sign extends from 32bit [19367] dynamic-link: Improve branch prediction on Silvermont [19369] network: Default domain name not reset by res_ninit when "search" / "domain" entry is removed from resolv.conf [19375] math: powerpc: incorrect results for POWER7 logb with negative subnormals [19385] localedata: bg_BG: time separator should be colon, not comma [19408] libc: linux personality syscall wrapper may erroneously return an error on 32-bit architectures [19415] libc: dladdr returns wrong names on hppa [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903, IBM905, IBM907, and IBM909 [19439] math: Unix98 isinf and isnan functions conflict with C++11 [19443] build: build failures with -DDEBUG [19451] build: Make check fails on test-double-vlen2 [19462] libc: Glibc failed to build with -Os [19465] math: Wrong code with -Os [19466] time: time/tst-mktime2.c is compiled into an infinite loop with -Os [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core CPU's. [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH] [19486] math: S390: Math tests fail with "Exception Inexact set". [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext [19550] libc: [mips] mmap negative offset handling inconsistent with other architectures [19590] math: Fail to build shared objects that use libmvec.so functions. Version 2.22 * The following bugs are resolved with this release: 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152, 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538, 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833, 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104, 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197, 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400, 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469, 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648, 18657, 18676, 18694, 18696, 18887. * Cache information can be queried via sysconf() function on s390 e.g. with _SC_LEVEL1_ICACHE_SIZE as argument. * A buffer overflow in gethostbyname_r and related functions performing DNS requests has been fixed. If the NSS functions were called with a misaligned buffer, the buffer length change due to pointer alignment was not taken into account. This could result in application crashes or, potentially arbitrary code execution, using crafted, but syntactically valid DNS responses. (CVE-2015-1781) * The time zone file parser has been made more robust against crafted time zone files, avoiding heap buffer overflows related to the processing of the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to large time zone data files. Overly long time zone specifiers in the TZ variable no longer result in stack overflows and crashes. * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors for LD and GD on x86 and x86-64, has been implemented. You will need binutils-2.24 or later to enable this optimization. * Character encoding and ctype tables were updated to Unicode 7.0.0, using new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red Hat). These updates cause user visible changes, such as the fix for bug 17998. * CVE-2014-8121 The NSS backends shared internal state between the getXXent and getXXbyYY NSS calls for the same database, causing a denial-of-service condition in some applications. * Added vector math library named libmvec with the following vectorized x86_64 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf, pow, powf. The library can be disabled with --disable-mathvec. Use of the functions is enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0. Shared library libmvec.so is linked in as needed when using -lm (no need to specify -lmvec explicitly for not static builds). Visit for detailed information. * A new fmemopen implementation has been added with the goal of POSIX compliance. The new implementation fixes the following long-standing issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The old implementation is still present for use be by existing binaries. * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21 releases. It has been fixed to match 2.19 and older, but binaries built against 2.20 and 2.21 might need to be recompiled. See BZ#18694. * Port to Native Client running on ARMv7-A (--host=arm-nacl). Contributed by Roland McGrath (Google). * The header is deprecated, and will be removed in a future release. Use of this header will trigger a deprecation warning. Application developers should update their code to use instead. This header was formerly part of SUS, but was deprecated in 1994 and removed from the standard in 2001. Also, the glibc implementation leaks memory. See BZ#18681 for more details. Version 2.21 * The following bugs are resolved with this release: 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498, 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618, 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370, 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555, 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647, 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719, 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797, 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885, 17892. * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate too little memory for the to-be-scanned arguments and overflow the allocated buffer. The implementation now correctly computes the required buffer size when using malloc, and switches to malloc from alloca as intended. * A new semaphore algorithm has been implemented in generic C code for all machines. Previous custom assembly implementations of semaphore were difficult to reason about or ensure that they were safe. The new version of semaphore supports machines with 64-bit or 32-bit atomic operations. The new semaphore algorithm is used by sem_init, sem_open, sem_post, sem_wait, sem_timedwait, sem_trywait, and sem_getvalue. * Port to Altera Nios II has been contributed by Mentor Graphics. * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp implementations for powerpc64/powerpc64le. Implemented by Adhemerval Zanella (IBM). * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64 and powerpc64le. This may improve lock scaling of existing programs on HTM capable systems. The lock elision code is only enabled with --enable-lock-elision=yes. Also, the TSX lock elision implementation for powerpc will issue a transaction abort on every syscall to avoid side effects being visible outside transactions. * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for AArch64. Contributed by ARM Ltd. * i386 memcpy functions optimized with SSE2 unaligned load/store. * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag under certain input conditions resulting in the execution of a shell for command substitution when the application did not request it. The implementation now checks WRDE_NOCMD immediately before executing the shell and returns the error WRDE_CMDSUB as expected. * CVE-2012-3406 printf-style functions could run into a stack overflow when processing format strings with a large number of format specifiers. * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an infinite loop if the DNS response contained a PTR record of an unexpected format. * The minimum GCC version that can be used to build this version of the GNU C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can still be used to compile programs using the GNU C Library. * The GNU C Library is now built with -Werror by default. This can be disabled by configuring with --disable-werror. * New locales: tu_IN, bh_IN, raj_IN, ce_RU. * The obsolete sigvec function has been removed. This was the original 4.2BSD interface that inspired the POSIX.1 sigaction interface, which programs have been using instead for about 25 years. Of course, ABI compatibility for old binaries using sigvec remains intact. * Merged gettext 0.19.3 into the intl subdirectory. This fixes building with newer versions of bison. * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions. The original MIPS o32 hard-float ABI requires an FPU where double-precision registers overlay two consecutive single-precision registers. MIPS32R2 introduced a new FPU mode (FR=1) where double-precision registers extend the corresponding single-precision registers which is incompatible with the o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both require the use of FR=1 making a transition necessary. New o32 ABI extensions enable users to migrate over time from the original o32 ABI through to the updated o32 FP64 ABI. To achieve this the dynamic linker now tracks the ABI of any loaded object and verifies that new objects are compatible. Mode transitions will also be requested as required and unsupportable objects will be rejected. The ABI checks include both soft and hard float ABIs for o32, n32 and n64. GCC 5 with GNU binutils 2.25 onwards: It is strongly recommended that all o32 system libraries are built using the new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible with the original and all new o32 ABI extensions. Configure a MIPS GCC compiler using --with-fp-32=xx to set this by default. Version 2.20 * The following bugs are resolved with this release: 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354. * Reverted change of ABI data structures for s390 and s390x: On s390 and s390x the size of struct ucontext and jmp_buf was increased in 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp are preserved pointing straight to the same implementation as the old ones. Given that, new callers will simply provide a too-big buffer to these functions. Any applications/libraries out there that embed jmp_buf or ucontext_t in an ABI-relevant data structure that have already been rebuilt against 2.19 headers will have to rebuilt again. This is necessary in any case to revert the breakage in their ABI caused by the glibc change. * Support for file description locks is added to systems running the Linux kernel. The standard file locking interfaces are extended to operate on file descriptions, not file descriptors, via the use of F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks are associated with an open file instead of a process. * Optimized strchr implementation for AArch64. Contributed by ARM Ltd. * The minimum Linux kernel version that this version of the GNU C Library can be used with is 2.6.32. * Running the testsuite no longer terminates as soon as a test fails. Instead, a file tests.sum (xtests.sum from "make xcheck") is generated, with PASS or FAIL lines for individual tests. A summary of the results is printed, including a list of failing lists, and "make check" exits with error status if there were any unexpected failures. "make check stop-on-test-failure=y" may be used to keep the old behavior. * The am33 port, which had not worked for several years, has been removed from ports. * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer supported; they now act the same as _DEFAULT_SOURCE (but generate a warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that conflicted with POSIX (support for which was removed in 2.19), the interfaces those macros enabled remain available when compiling with _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature test macros defined. * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd. * Added support for TX lock elision of pthread mutexes on s390 and s390x. This may improve lock scaling of existing programs on TX capable systems. The lock elision code is only built with --enable-lock-elision=yes and then requires a GCC version supporting the TX builtins. With lock elision default mutexes are elided via __builtin_tbegin, if the cpu supports transactions. By default lock elision is not enabled and the elision code is not built. * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not copy the path argument. This allowed programs to cause posix_spawn to deference a dangling pointer, or use an unexpected pathname argument if the string was modified after the posix_spawn_file_actions_addopen invocation. * All supported architectures now use the main glibc sysdeps directory instead of some being in a separate "ports" directory (which was distributed separately before glibc 2.17). * The NPTL implementation of POSIX pthreads is no longer an "add-on". On configurations that support it (all Linux configurations), it's now used regardless of the --enable-add-ons switch to configure. It is no longer possible to build such configurations without pthreads support. * Locale names, including those obtained from environment variables (LANG and the LC_* variables), are more tightly checked for proper syntax. setlocale will now fail (with EINVAL) for locale names that are overly long, contain slashes without starting with a slash, or contain ".." path components. (CVE-2014-0475) Previously, some valid locale names were silently replaced with the "C" locale when running in AT_SECURE mode (e.g., in a SUID program). This is no longer necessary because of the additional checks. * On x86-64, the dynamic linker's lazy-binding support is now compatible with application code using Intel MPX instructions. (With all previous versions, the MPX register state could be clobbered when making calls into or out of a shared library.) Note that while the new dynamic linker is compatible with all known x86 hardware whether or not it supports Intel MPX, some x86 instruction-set emulators might fail to handle the new instruction encodings. This is known to affect Valgrind versions up through 3.9 (but will be fixed in the forthcoming 3.10 release), and might affect other tools that do instruction emulation. * Support for loadable gconv transliteration modules has been removed. The support for transliteration modules has been non-functional for over a decade, and the removal is prompted by security defects. The normal gconv conversion modules are still supported. Transliteration with //TRANSLIT is still possible, and the //IGNORE specifier continues to be supported. (CVE-2014-5119) * Decoding a crafted input sequence in the character sets IBM933, IBM935, IBM937, IBM939, IBM1364 could result in an out-of-bounds array read, resulting a denial-of-service security vulnerability in applications which use functions related to iconv. (CVE-2014-6040) Version 2.19 * The following bugs are resolved with this release: 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981, 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751, 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286, 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089, 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427, 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632, 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748, 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844, 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886, 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915, 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968, 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046, 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144, 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245, 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338, 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385, 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430, 16431, 16453, 16474, 16506, 16510, 16529 * Slovenian translations for glibc messages have been contributed by the Translation Project's Slovenian team of translators. * The public headers no longer use __unused nor __block. This change is to support compiling programs that are derived from BSD sources and use __unused internally, and to support compiling with Clang's -fblock extension which uses __block. * CVE-2012-4412 The strcoll implementation caches indices and rules for large collation sequences to optimize multiple passes. This cache computation may overflow for large collation sequences and may cause a stack or buffer overflow. This is now fixed to use a slower algorithm which does not use a cache if there is an integer overflow. * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and rules for large collation sequences to optimize multiple passes and falls back to alloca if malloc fails, resulting in a possible stack overflow. The implementation now falls back to an uncached collation sequence lookup if malloc fails. * CVE-2013-4788 The pointer guard used for pointer mangling was not initialized for static applications resulting in the security feature being disabled. The pointer guard is now correctly initialized to a random value for static applications. Existing static applications need to be recompiled to take advantage of the fix (bug 15754). * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes to the d_name member of struct dirent, or omit the terminating NUL character. (Bugzilla #14699). * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and aligned_alloc functions could allocate too few bytes or corrupt the heap when passed very large allocation size values (Bugzilla #15855, #15856, #15857). * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results for AF_INET6 has been fixed (Bugzilla #16072). * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW, pap_CW, quz_PE, the_NP. * Substantially revised locales: gd_GB, ht_HT * The LC_ADDRESS field was updated to support country_car for almost all supported locales. * ISO 1427 definitions were updated. * ISO 3166 definitions were updated. * The localedef utility now supports --big-endian and --little-endian command-line options to generate locales for a different system from that for which the C library was built. * Binary locale files now only depend on the endianness of the system for which they are generated and not on other properties of that system. As a consequence, binary files generated with new localedef may be incompatible with old versions of the GNU C Library, and binary files generated with old localedef may be incompatible with this version of the GNU C Library, in the following circumstances: + Locale files may be incompatible on m68k systems. + Locale archive files (but not separate files for individual locales) may be incompatible on systems where plain "char" is signed. * The configure option --disable-versioning has been removed. Builds with --disable-versioning had not worked for several years. * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh, cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue). * SystemTap probes for malloc have been introduced. * SystemTap probes for slow multiple precision fallback paths of transcendental functions have been introduced. * Support for powerpc64le has been added. * The soft-float powerpc port now supports e500 processors. * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64. * A new feature test macro _DEFAULT_SOURCE is available to enable the same set of header declarations that are enabled by default, even when other feature test macros or compiler options such as -std=c99 would otherwise disable some of those declarations. * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that conflict with POSIX. The libbsd-compat library (which was a dummy library that did nothing) has also been removed. * Preliminary documentation about Multi-Thread, Async-Signal and Async-Cancel Safety has been added. * Change of ABI data structures for s390 and s390x: On s390 and s390x the size of struct ucontext and jmp_buf was increased to allow for future hardware extensions. All library functions that accept or return these structures were versioned in order to provide backwards compatibility with existing code. However, not all cases can be handled with interface versioning. If an application embeds either structure into another structure and that structure is passed to another compilation unit which expects the newer larger-sized object then any access to the new fields will result in undefined behaviour. Similarly any access to fields that were moved by the enlarging of the structures will cause undefined behaviour. To fix the undefined behaviour all objects that are part of the final in-memory image must agree on the size of structures, and this may require recompilation. Version 2.18 * The following bugs are resolved with this release: 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120, 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988, 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496, 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941, 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755, 15759. * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal has been fixed by disabling the use of pt_chown (Bugzilla #15755). Distributions can re-enable building and using pt_chown via the new configure option `--enable-pt_chown'. Enabling the use of pt_chown carries with it considerable security risks and should only be used if the distribution understands and accepts the risks. * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla #15078). * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been fixed (Bugzilla #15330). * Add support for calling C++11 thread_local object destructors on thread and program exit. This needs compiler support for offloading C++11 destructor calls to glibc. * Improved worst case performance of libm functions with double inputs and output. * Support for priority inherited mutexes in pthread condition variables on non-x86 architectures. * Port to Xilinx MicroBlaze contributed by David Holsgrove. * Optimized string functions for AArch64. Implemented by Marcus Shawcroft. * Optimized string functions for ARM. Implemented by Will Newton and Richard Henderson. * Optimized libm functions for SPARC. Implemented by David S. Miller. * Support for building more of ARM glibc as Thumb-2 code. Implemented by Richard Henderson. * Support for building most of MIPS glibc as MIPS16 code. Implemented by Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov. * Added a benchmark framework to track performance of functions in glibc. * New macro named issignaling to check for a signaling NaN (sNaN). It is based on draft TS 18661 and currently enabled as a GNU extension. * On Linux, the clock function now uses the clock_gettime system call for improved precision, rather than old times system call. * Added support for version-3 tz format files. This is needed when using the tz database release 2013e or later, and affects a few unusual cases -- currently only TZ='America/Godthab' for time stamps after 2037. * Added new API functions pthread_getattr_default_np and pthread_setattr_default_np to get and set the default pthread attributes of a process. * Added support for TSX lock elision for pthread mutexes on i386 and x86-64. This may improve lock scaling of existing programs on TSX capable systems. When the --enable-lock-elision=yes parameter is specified at configure time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT mutexes. * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10 availability). Implemented by Ryan S. Arnold. * Support added for POWER8 platform. Implemented by Ryan S. Arnold. Version 2.17 * The following bugs are resolved with this release: 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808, 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638, 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679, 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950, 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157, 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298, 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376, 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518, 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568, 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645, 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719, 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803, 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833, 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872, 14879, 14889, 14893, 14898, 14914. * Optimization of memcpy for MIPS. * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with EMFILE has been fixed (Bugzilla #14889). * The add-on ports collection is now distributed in the "ports" subdirectory of the main GNU C Library distribution, rather than separately. * Port to ARM AArch64 contributed by Linaro. * Support for STT_GNU_IFUNC symbols added for s390 and s390x. Optimized versions of memcpy, memset, and memcmp added for System z10 and zEnterprise z196. Implemented by Andreas Krebbel. * The new function secure_getenv allows secure access to the environment, returning NULL if running in a SUID/SGID process. This function replaces the internal function __secure_getenv. * SystemTap static probes have been added into the dynamic linker. Implemented by Gary Benson. * Optimizations of string functions strstr, strcasestr and memmem. Implemented by Maxim Kuvyrkov. * The minimum Linux kernel version that this version of the GNU C Library can be used with is 2.6.16. * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for powerpc POWER7. Implemented by Will Schmidt. * New configure option --disable-nscd builds the C library such that it never attempts to contact the Name Service Caching Daemon (nscd). New configure option --disable-build-nscd avoids building nscd itself; this is the default if --disable-nscd is used. * Improved support for cross-compilation, including cross-testing and bootstrap builds without a previously built glibc. * Several testsuite tests are now able to test multiple IFUNC variants of an interface, rather than just testing the one that would be chooen by default. * New configure options --with-bugurl and --with-pkgversion, for distributors to use to embed their bug-reporting and package version information in --help and --version output. * The ttyname and ttyname_r functions on Linux now fall back to searching for the tty file descriptor in /dev/pts or /dev if /proc is not available. This allows creation of chroots without the procfs mounted on /proc. * The `crypt' function now fails if passed salt bytes that violate the specification for those values. On Linux, the `crypt' function will consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is enabled, and fail on encrypted strings using the MD5 or DES algorithm when the mode is enabled. * The `clock_*' suite of functions (declared in ) is now available directly in the main C library. Previously it was necessary to link with -lrt to use these functions. This change has the effect that a single-threaded program that uses a function such as `clock_gettime' (and is not linked with -lrt) will no longer implicitly load the pthreads library at runtime and so will not suffer the overheads associated with multi-thread support in other code such as the C++ runtime library. * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ, sat_IN, and szl_PL. Version 2.16 * The following bugs are resolved with this release: 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174, 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047, 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495, 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531, 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563, 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656, 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738, 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792, 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854, 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892, 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917, 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928, 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970, 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036, 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064, 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123, 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273, 14277, 14278. * Support for the x32 ABI on x86-64 added. The x32 target is selected by configuring glibc with: BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32' Visit for more x32 ABI info. Implemented by H.J. Lu. * ISO C11 support: + define static_assert + do not declare gets + declare at_quick_exit and quick_exit also for ISO C11 + aligned_alloc. NB: The code is deliberately allows the size parameter to not be a multiple of the alignment. This is a moronic requirement in the standard but it is only a requirement on the caller, not the implementation. + timespec_get added + uchar.h support added + CMPLX, CMPLXF, CMPLXL added Implemented by Ulrich Drepper. * Support for the IA-64 has been moved to ports. * Remove support for anything but ELF binary format * Checking versions of poll, ppoll added. Implemented by Ulrich Drepper. * More generic and 64-bit performance optimizations to math functions. Implemented by Ulrich Drepper. * New configure option --enable-obsolete-rpc makes the deprecated RPC headers and functions available at compile time as they were before version 2.14. This option will be removed at some time in the future after the TI-RPC library becomes fully sufficient for the needs of existing applications. * Compatibility code for Linux kernel versions before 2.4 has been removed. Note that glibc is not expected to work with any Linux kernel version before 2.6. * New header and function getauxval allowing easy access to the AT_* key-value pairs passed from the Linux kernel. The header also defines the HWCAP_* bits associated with the AT_HWCAP key. * New locales: mag_IN * New configure option --enable-systemtap builds SystemTap static probes into libc for setjmp and longjmp and into libpthread for various operations. So far the setjmp/longjmp probes and some of the libpthread probes are provided only for i*86 and x86_64. Implemented by Roland McGrath and Rayson Ho. * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva. * More optimized functions for PowerPC. Implemented by Adhemerval Zanella and Will Schmidt. * More optimized functions for SPARC. Implemented by David S. Miller. * Improved support for cross-compilation, especially bootstrap builds without a previously built glibc. * Ports for the TILE-Gx and TILEPro families of processors. Contributed by Chris Metcalf from Tilera. * Support for the old ARM ABI has been removed from ports. Only the EABI is now supported for ARM processors. * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3 as the name of the dynamic linker, to distinguish it from the /lib/ld-linux.so.3 dynamic linker used for the base EABI. * Support for CRIS has been removed from ports. * A new class of installed header has been documented for low-level platform-specific functionality. PowerPC added the first instance with a function to provide time base register access. Contributed by Tulio Magno Quites Machado Filho. * ix86 configurations now install header files that are consistent with what x86-64 configurations install. These same header files can be used for -m32, -m64, or -mx32 builds. Contributed by H.J. Lu. * Math library bug fixes. A thorough audit of all open math library bugs was conducted by Joseph Myers. Significant progress was made on many math library bugs resulting in more accurate exceptions and function results. Many thanks to all those that contributed including Andreas Jaeger for his patch review and work on the x87 trigonometric instruction issues. * Timezone data is no longer installed. Timezone-related binaries and scripts will continue to be installed. Users should obtain their timezone data from their distribution provider or from the tzdata package at . Version 2.15 * The following bugs are resolved with this release: 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847, 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962, 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092, 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179, 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335, 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472, 13484, 13506, 13515, 13523, 13524, 13538, 13540 * New program pldd to list loaded object of a process Implemented by Ulrich Drepper. * Add nss_db support back to glibc. No more dependency on Berkeley db and support for initgroups lookups. Implemented by Ulrich Drepper. * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32. Contributed by HJ Lu. * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64. Contributed by HJ Lu. * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen on x86-32 and x86-64. Contributed by Liubov Dmitrieva. * Optimized strchr and strrchr for SSE on x86-32. Contributed by Liubov Dmitrieva. * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy for x86-64 and x86-32. Contributed by Liubov Dmitrieva. * New interfaces: scandirat, scandirat64 Implemented by Ulrich Drepper. * Checking versions of FD_SET, FD_CLR, and FD_ISSET added. Implemented by Ulrich Drepper. * nscd now also caches the netgroup database. Implemented by Ulrich Drepper. * Integrate libm with gcc's -ffinite-math-only option. Implemented by Ulrich Drepper. * Lots of generic, 64-bit, and x86-64-specific performance optimizations to math functions. Implemented by Ulrich Drepper. * Optimized strcasecmp and strncasecmp for AVX on x86-64. Implemented by Ulrich Drepper. * New Linux interfaces: process_vm_readv, process_vm_writev * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32. Implemented by Ulrich Drepper. * Optimized nearbyint and strcasecmp for PPC. Implemented by Adhemerval Zanella. * New locales: bho_IN, unm_US, es_CU, ta_LK Version 2.14 * The following bugs are resolved with this release: 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257, 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724, 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945, 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350, 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489, 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583, 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655, 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723, 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792, 12795, 12811, 12813, 12814, 12841 * The RPC implementation in libc is obsoleted. Old programs keep working but new programs cannot be linked with the routines in libc anymore. Programs in need of RPC functionality must be linked against TI-RPC. The TI-RPC implementation is IPv6 enabled and there are other benefits. Visible changes of this change include (obviously) the inability to link programs using RPC functions without referencing the TI-RPC library and the removal of the RPC headers from the glibc headers. Implemented by Ulrich Drepper. * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at, syncfs, setns, sendmmsg * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH, yue_HK, lij_IT, mhr_RU * New encodings: CP770, CP771, CP772, CP773, CP774 * New program sotruss to trace calls through PLTs Implemented by Ulrich Drepper. * The malloc hook implementation is marked deprecated and will be removed from the default implementation in the next version. The design never worked ever since the introduction of threads. Even programs which do not create threads themselves can use multiple threads created internally. Version 2.13 * The following bugs are resolved with this release: 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611, 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979, 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113, 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348, 12378, 12394, 12397 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark * POWER7 optimizations: memset, memcmp, strncmp * New optimized string functions for x86-64: strnlen (SSE2), strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2) Implemented by Ulrich Drepper. Version 2.12 * The following bugs are resolved with this release: 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915, 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001, 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070, 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184, 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194, 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279, 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397, 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571 * New interfaces: pthread_getname_np, pthread_setname_np * New Linux interface: recvmmsg * STT_GNU_IFUNC implemented for Sparc by David Miller. * The dynamic linker now recognizes supported ABI versions from the EI_ABIVERSION field in the ELF header. Implemented by Ulrich Drepper. * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table will not be used to fill in password fields in the passwd.byname replies. Instead it is used to synthesize the shadow.byname table, should it be missing. This is a useful mode in some installations involving Solaris. Implemented by Ulrich Drepper. * New locales: kok_IN, sq_MK, cv_RU Version 2.11 * The following bugs are resolved with this release: 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183, 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229, 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416, 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564, 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784, 10789, 10817, 10823, 10840, 10847 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps, mkostemps64 Implemented by Ulrich Drepper. * Checking version of longjmp added that fails if an uninitialized stack frame would be created. Implemented by Ulrich Drepper. * STT_GNU_IFUNC is now supported in static executables. Implemented by H.J. Lu. * STT_GNU_IFUNC implemented for PPC by Alan Modra. * New optimized string functions for x86-64: strstr, strcasestr, memcmp, strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2), strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2). Contributed by H.J. Lu. strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3). Implemented by Ulrich Drepper. * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk, strstr, strcasestr. Contributed by H.J. Lu. * Support for fma instruction in AVX on x86-64. Implemented by H.J. Lu and Ulrich Drepper. * AVX support in x86-64 auditing support in ld.so. Implemented by H.J. Lu. * STB_GNU_UNIQUE support added. Implemented by Ulrich Drepper. * Implement second fallback mode for optimized DNS lookup for even more broken environments. If two requests from the same port are not handled correctly close the socket and open a new one before sending the second request. The 'single-request-reopen' option in /etc/resolv.conf can be used to select this mode right away, instead of rediscovering the necessity is every process again. Implemented by Ulrich Drepper. * New resolver flag RES_USE_DNSSEC to enable use of verified lookup. Implemented by Adam Tkac. * Optimized iconv conversions for S390x. Implemented by Andreas Krebbel. * Using condvars with PI mutexes is now more efficient due to kernel support for requeueing to PI futexes. NPTL support added for x86-64. Implemented by Ulrich Drepper. * New locales: ps_AF, my_MM Version 2.10 * The following bugs are resolved with this release: 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098, 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736, 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881, 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052, 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info Implemented by Ulrich Drepper. * New Linux interfaces: accept4, fallocate, fallocate64. Implemented by Ulrich Drepper. * Correct declarations of string function when used in C++ code. This could lead to compile errors for invalid C++ code. * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are now in POSIX. * New POSIX 2008 interface: psiginfo Implemented by Ulrich Drepper. * New ISO C++1x interfaces: quick_exit, at_quick_exit Implemented by Ulrich Drepper. * Support for selecting between multiple function definitions at runtime using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper. * The libcrypt library can now use the hash function implementations in NSS. Implemented by Ulrich Drepper. * The malloc implementation can be compiled to be less memory efficient but higher performing in multi-threaded programs. Implemented by Ulrich Drepper. * New locales: nan_TW@latin, ks_IN * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64. Implemented by Ulrich Drepper. * Extended printf hook support. It is possible to use user-defined types and extend existing format specifiers. Implemented by Ulrich Drepper. * Handling for group shadow files has been added. Implemented by Ulrich Drepper. * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS servers (the case, e.g., for some people using the built-in DNS server in ADSL modems/routers). There is a once-per-process timeout in case of a broken server. To avoid it, users can run nscd or put 'options single-request' in /etc/resolv.conf. Implemented by Ulrich Drepper. Version 2.9 * The following bugs are resolved with this release: 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked up at the same time. Implemented by Ulrich Drepper. * TLS descriptors for LD and GD on x86 and x86-64. Implemented by Alexandre Oliva. * getaddrinfo now handles DCCP and UDPlite. Implemented by Ulrich Drepper. * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh, htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh. Implemented by Ulrich Drepper. * New implementation of memmem, strstr, and strcasestr which is O(n). Implemented by Eric Blake. * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2 * Implement "e" option for popen to open file descriptor with the close-on-exec flag set. Implemented by Ulrich Drepper. * Implement "b" mode for fmemopen. In this mode writes writes don't implicitly add a NUL byte and seeks from the end of the buffer really use the buffer end, not the string length as the basis. Implemented by Ulrich Drepper. * Many functions, exported and internal, now atomically set the close-on-exec flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper. * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu, Sinhala) Implemented by Pravin Satpute. * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW. Version 2.8 * The following bugs are resolved with this release: 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220, 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382, 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454, 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600, 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768, 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979, 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042 * New locales: bo_CN, bo_IN, shs_CA. * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8. * Sorting rules for some Indian languages (Devanagari and Gujarati). Implemented by Pravin Satpute. * IPV6 addresses in /etc/resolv.conf can now have a scope ID * nscd caches now all timeouts for DNS entries Implemented by Ulrich Drepper. * nscd is more efficient and wakes up less often. Implemented by Ulrich Drepper. * More checking functions: asprintf, dprintf, obstack_printf, vasprintf, vdprintf, and obstack_vprintf. Implemented by Jakub Jelinek. * Faster memset for x86-64. Implemented by Harsha Jagasia and H.J. Lu. * Faster memcpy on x86. Implemented by Ulrich Drepper. * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX). Implemented by Ulrich Drepper. * Faster sqrt and sqrtf implemention for some PPC variants. Implemented by Steven Munroe. Version 2.7 * The following bugs are resolved with this release: 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566, 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773, 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925, 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063, 5071, 5103, 5104, 5112, 5113, 5184, 5186 * More checking functions: fread, fread_unlocked, open*, mq_open. Implemented by Jakub Jelinek and Ulrich Drepper. * Extend fortification to C++. Implemented by Jakub Jelinek. * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance by not recognizing 'a' as a modifier when those specs are requested. Implemented by Jakub Jelinek. * PPC optimizations to math and string functions. Implemented by Steven Munroe. * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional options to be passed. Implemented by Ulrich Drepper. * More CPU set manipulation functions. Implemented by Ulrich Drepper. * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write. Implemented by Ulrich Drepper. * Handle private futexes in the NPTL implementation. Implemented by Jakub Jelinek and Ulrich Drepper. * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc. Implemented by Roland McGrath and Ulrich Drepper. * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper. * SHA-256 and SHA-512 based password encryption. Implemented by Ulrich Drepper. * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG, ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN, yo_NG. + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU. Implemented by Ulrich Drepper. Version 2.6 * The following bugs are resolved with this release: 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348, 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493, 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842, 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991, 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114, 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392, 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586, 4702, 4858 * New Linux interfaces: epoll_pwait, sched_getcpu. * New generic interfaces: strerror_l. * nscd can now cache the services database. Implemented by Ulrich Drepper. Version 2.5 * The following bugs are resolved with this release: 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784, 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182, 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472, 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526, 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693, 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841, 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998, 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189, 3225, 3251, 3252, 3253, 3273 * For Linux, the sorting of addresses returned by getaddrinfo now also handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled. Implemented by Ulrich Drepper. * Allow system admin to configure getaddrinfo with the /etc/gai.conf file. Implemented by Ulrich Drepper. * New Linux interfaces: splice, tee, sync_file_range, vmsplice. * New iconv module for MIK. Contributed by Alexander Shopov. * For sites with broken group and/or passwd database, the auto-propagate option of nscd can prevent creating ID lookup entries from the results of a name lookup and vice versa. This usually is no problem but some site might have problems with the default behavior. Implemented by Ulrich Drepper. * Iterating over entire database in NIS can be slow. With the SETENT_BATCH_READ option in /etc/default/nss a system admin can decide to trade time for memory. The entire database will be read at once. Implemented by Ulrich Drepper. * The interfaces introduced in RFC 3542 have been implemented by Ulrich Drepper. * Support for the new ELF hash table format was added by Ulrich Drepper. * Support for priority inheritance mutexes added by Jakub Jelinek and Ulrich Drepper. * Support for priority protected mutexes added by Jakub Jelinek. * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN, or_IN, csb_PL, fy_NL, sr_ME. Version 2.4 * More overflow detection functions. * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153, IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba. More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097, IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144, IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517, IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712, IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed by Masahide Washizawa. * It is now possible to install audit libraries for the dynamic linker using LD_AUDIT. Implemented by Ulrich Drepper. * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no longer supported. The new NPTL implementation requires Linux 2.6 kernels. For a libc and libpthread that works well on Linux 2.4 kernels, we recommend using the stable 2.3 branch. * The new function open_wmemstream acts like open_memstream, but uses a wchar_t wide character buffer. * The new function ppoll is an improved version of poll, similar to pselect. * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat, futimesat, faccessat, mkdirat, mkfifoat, mknodat, renameat, unlinkat, linkat, symlinkat, readlinkat. * New Linux kernel system calls: unshare, inotify_init, inotify_add_watch, inotify_rm_watch. * The euidaccess function is now also known by the alias eaccess, for compatibility with some other systems. * Timezone data updated to 2006b version. Version 2.3.6 * The following bugs are resolved with this release: 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961, 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086, 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098, 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109, 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252, 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534 Visit for the details of each bug. * As of this release, GCC 4 can be used to compile the C Library. * Timezone data updated to 2005m version. Version 2.3.5 * The following bugs are resolved with this release: 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719, 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736, 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776, 777, 787, 821, 822, 823, 825 Visit for the details of each bug. Version 2.3.4 * Support for RFC 3678. Real implementations exist only for Linux so far. Implemented by Ulrich Drepper. * nscd can now cache entries persistently. Expiring entries are reloaded. For speedups the cache can be shared in memory with client processes. Implemented by Ulrich Drepper. * nscd can now perform SELinux checks. Implemented by Matthew Rickard . * getaddrinfo queries are now cached. Canonical name lookup is performed efficiently. Implemented by Ulrich Drepper. * The nothrow function attribute is used when headers are used by gcc when compiling C code. This can avoid significant amounts of exception handling data. * The malloc functions perform more error checking and are stricter when it comes to reacting on errors. The default action is to terminate the process after showing an error message. Implemented by Ulrich Drepper. * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int lookups anymore unless explicitly requested. Implemented by Ulrich Drepper. * Namespaces in ld.so are implemented. DSOs can be loaded in separate namespaces using the new function dlmopen(). This feature is of course, like most other dynamic loading functionality, not available in statically linked applications. Implemented by Ulrich Drepper. * Low-overhead boundary checking variants of string and some stdio functions were added. These are to be used in conjunction with a gcc patch by Jakub Jelinek which adds calls to these functions if possible. Implemented by Jakub Jelinek and Ulrich Drepper. * Old code for several operating systems and machine architectures that have not been in working condition in a long time have been removed from the main source tree maintained by the GNU C Library's maintainers. These files are now reside in the separate `ports' source module that is usable as an add-on when building the library. Version 2.3.3 * New functions `dladdr1' and `dlinfo' in provide more ways to interrogate the dynamic linker, compatible with the Solaris interface. * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64; implemented by Paul Mackerras, Steven Munroe, and Roland McGrath. * getifaddrs now uses the netlink interface on Linux to get its information. Implemented by Thorsten Kukuk. * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF. Implemented by Ulrich Drepper. * support for non-executable stacks on x86 has been added. Changes mostly by Roland McGrath. * regex is now much faster for multibyte locales. Changes by Jakub Jelinek and Ulrich Drepper. * getaddrinfo now performs destination address selection according to RFC 3484. Version 2.3.2 * Thread-safe interfaces for many functions that access locale data were added in version 2.3, but these features were omitted from NEWS. Many functions have variants with an `_l' suffix that take a `locale_t' object as a parameter rather than consulting the current locale. The new functions `newlocale', `duplocale', and `freelocale' in create and maintain `locale_t' objects. Additionally, the new function `uselocale' sets "the current locale" (as used by functions not so parameterized) set for an individual thread. These features were added in version 2.3, implemented by Ulrich Drepper and Roland McGrath. * The functions getresuid, getresgid, setresuid, and setresgid, which have long been available on Linux, are now declared in and are now also available on the Hurd. * ELF thread-local storage support (TLS) now works on x86-64. * The new dynamic string token $LIB is expanded in shared library names. This normally expands to lib, but on some 64-bit platforms to lib64 instead. * Aldy Hernandez contributed complete software floating point support for PowerPC machines with no FPU. * fexecve is implemented on Linux. * The `btowc' function should work at least twice as fast due to specialized callbacks in the iconv modules. Implemented by Bruno Haible. * With approriate thread add-ons cancelable functions are now implemented in libc.so as well. No need to call the function in libpthread. This change allowed to finally disable the incorrect and expensive handling of weak definition in ld.so. * Yet more PLT entries in libc.so have been removed. We finally arrived at the bare minimum. Startup times improved appropriately. * Support for the new Linux/x86 system call interface was added. The AT_SYSINFO auxiliary vector entry is recognized and handled. Version 2.3 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164 charsets. * iconv (the program and the interface) now accepts empty names (excluding options like //TRANSLIT) to mean "use charset of current locale". * localedef can now transliterate characters in strings which are not in the provided charmap. The information from the input locale is used. * Prelinking support was added for ELF targets. This requires additional tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek. * Read-only stdio streams now use mmap to speed up operation by eliminating copying and buffer underflows. To use add 'm' to the mode string of the fopen/fdopen/freopen call. Implemented by Ulrich Drepper. * The malloc functions were completely rewritten by Wolfram Gloger based on Doug Lea's malloc-2.7.0.c. * Isamu Hasegawa contributed a completely new and POSIX-conformant implementation of regex. * Bruno Haible upgraded the iconv and locale implementation to support Unicode 3.2. * Contents of the LC_* and LANG environment variables in the CEN style are not recognized anymore. It never was used. Change by Ulrich Drepper. * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF thread-local storage (TLS) ABI on some platforms. Changes by Ulrich Drepper. SH support by Kaz Kojima. * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213, EUC-JISX0213, and TSCII. * New header with functions `getifaddrs' and `freeifaddrs': BSD-compatible interface for getting all network interface addresses. Implementation for IPv4 by Roland McGrath. * Loading of locale data is faster due to the introduction of a locale archive. Implemented by Roland McGrath and Ulrich Drepper. * Startup times are significantly reduced by not using exported functions inside the library itself. Changes by Jakub Jelinek, Roland McGrath, and Ulrich Drepper. * Steven Munroe contributed a port to PowerPC64/Linux. Version 2.2.6 * The Hurd now uses the GNU libio implementation of stdio rather than the old GNU stdio implementation, and uses a new ABI (libc.so.0.3). * The Hurd on x86 now has the `ioperm' function and header file with the same behavior as the Linux system call of the same name. Version 2.2.5 * Stephen Moshier implemented log2, log10, powl and cbrtl for the 128-bit long double format. * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160, IBM1161, and IBM1162 charsets. * Andreas Jaeger contributed a port to x86-64/Linux. * Peter Bruin contributed a port to PowerPC/Hurd. * libc functions using I/O streams now can handle wide-oriented streams as well. * optimizations in the dynamic linker. Binaries created by recent binutils versions start up quicker due to reduced time spent on relocations. * Support for use of gcc3 added by Jakub Jelinek and HJ Lu. Version 2.2.4 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh, asinh, atanh, j0 for the 128-bit long double format. * Bruno Haible updated all the code handling Unicode in some form to support Unicode 3.1. * Speed of regex for single-byte locales is back to previous levels. Patch by Isamu Hasegawa. * Alpha, SPARC, and IA-64 now also using floating stacks. * Startup time of internationalized applications greatly improved through iconv cache. Use iconvconfig to generate the cache file. Contributed by Ulrich Drepper. * The IA-64 specific part of ld.so was rewritten to eliminate some pretty severe performance problems. Patch by David Mosberger. * The Hurd port got a lot more functionality like AIO, various stdio extensions, etc. Mainly done by Roland McGrath. * mtrace can now lookup symbols in shared libraries. Version 2.2.3 * Intel's IA-64 math library is largely integrated. It provides fast and accurate implementatations for most basic and standard math functions in float, double, and long double format. * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc, and asin for the 96-bit long double format and asin, log, tan for the 128-bit long double format. * The beginning of a last-bit accurate math library by IBM Haifa were added. The basic double functions exist today. Contributed by Abraham Ziv , Moshe Olshansky , Ealan Henis , and Anna Reitman . * An asynchronous name lookup library was added. The interface is designed after POSIX AIO. The proposal was circulated beforehand to get comments. No negative ones came in. Implemented by Ulrich Drepper. * Port to S390/64bit contributed by Martin Schwidefsky . * David Mosberger implemented the setcontext family of functions for Linux/IA-64. * The RPC code is now thread safe. Threads can now use the same service of different services at the same time. Patch by Eric Norum with some help by Ulrich Drepper. * Martin Schwidefsky implemented the setcontext family of functions for Linux/S390. * Ulrich Drepper implemented the setcontext family of functions for Linux/x86. * Port to Linux/CRIS contributed by Axis Communications. Version 2.2.2 * Lots of headers were cleaned up. Using the tool in the conform/ subdir we can now check for namespace violations and missing declarations. The result is that almost all headers are now Unix-compliant (as defined in the upcoming XPG6). The negative side is that some programs might need corrections, too, if they depend on the incorrect form of the headers in previous versions which defined too many symbols and included too many other headers. * regex now handles multibyte character sets correctly. Contributed by Isamu Hasegawa . * iconv (the program) does now conform to the upcoming XPG6 and handles charmaps. Instead of the charset names the path of charmaps can be provided and the conversion happens based on this data. Contributed by Ulrich Drepper. * The locale program now provides detailed information about the installed locales. While locale -a only lists the names of the supported locales locale -a --verbose provides details such as country, language, and codeset name. Contributed by Ulrich Drepper. Version 2.2.1 * The gencat program now parses the input file according to the charset selected by the LC_CTYPE category. This is important for stateful character sets. To make generating catalogs easier there is a way to overwrite the charset selected by the locale: before the first message or $ quote line the catalog can contain a line like $ codeset=ISO-8859-2 to select the charset (ISO-8859-2 in this case). Implemented by Shinya Hanataka and Ulrich Drepper. * New codeset conversion modules: IBM-922 (Estonia PC codeset), IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset). Contributed by Masahide Washizawa . * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson and Rick Gorton . * The LANGUAGE environment variable is now ignored unless the locale is changed from the default "C" locale. * The usual bug fixes. Version 2.2 * Greg McGary added runtime support for bounds checking using gcc's new -fbounded-pointers option. ix86 target is complete. PowerPC is in progress. * Thorsten Kukuk added secure mode support to nscd. * The Berkeley db libraries have been removed. Related, the nss_db module is now in a separate package since it obviously requires a database library being available. * Wide character I/O streams implemented by Ulrich Drepper. * Functions from the extended socket API added by Ulrich Drepper. * Functions feenableexcept and fedisableexcept to control the behaviour of individual exceptions have been added by Andreas Jaeger. * ldconfig program added by Andreas Jaeger and Jakub Jelinek. * The resolver code has been updated from bind 8.2.3-T5B which supports threads. The integration was done by Andreas Jaeger, Adam D. Bradley, and Mark Kettenis. This change could in some situations effect backward compatibility. Since now `_res' is a thread-local instead of a global variable, modifying it in one thread does not have any effect in other threads. The resolver library was also extended to allow IPv6 as the transport protocol for the requests. This work was done by Stig Venaas. * Compatibility code for K&R C compilers has been removed from the header files. A ISO C compiler is needed to use the library (conforming to either C89 or C99 standard). * Complete rewrite of the localedef program to support multibyte character sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll, strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work. Implemented by Ulrich Drepper. Bruno Haible significantly improved the generation and use of the data structures for the wide character tables. * Plural handling in gettext implemented by Ulrich Drepper. * The utmp daemon has been removed. * The port to MIPS-Linux has been finished by Andreas Jaeger. * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima and Yutaka Niibe. * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper. * POSIX barriers implemented by Kaz Kylheku. * POSIX spawn function family implemented by Ulrich Drepper. * POSIX spinlocks are now available. * Timed wait functions for mutex, rwlock, and semaphores are implemented. * the configure option --enable-kernel=X.Y.Z allows to strip out compatibility for kernel versions before X.Y.Z. This is currently only implemented for Linux. * the sockaddr_in6 structure changed. The IPv6 working group added a new field sin6_scope_id. This means that all programs using IPv6 should be recompiled. Don't expect binary compatibility with previous glibc versions. * various conversion modules for IBM character sets contributed by Masahide Washizawa. * IA-64 port by Jes Sorensen and HJ Lu. Version 2.1.3 * bug fixes Version 2.1.2 * bug fixes Version 2.1.1 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added. * New xdr functions are added; some rpc functions are now 64bit clean. * Fixed a number of bugs and memory leaks (especially in NIS+ code). * Fixed known incompatibilities with glibc 2.0. * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx. * Optimized a number of functions (especially the ELF dynamic loader). * Update timezone data files. * lots of charmaps corrections * some new locale definitions and charmaps Version 2.1 * Richard Henderson corrected size of struct timeval on Linux/Alpha to conform to POSIX member type requirements. Symbol versions have been adjusted as needed within the library, and for direct use by applications, but there is potential for problems if third-party libraries use struct timeval as part of their interface. This does not present a problem for X and other "essential" system libraries. * An additional locale model to support C++ Standard Library locale model and probably more was implemented by Ulrich Drepper. * Eric Youngdale and Ulrich Drepper implemented versioning of objects on symbol level. * Miles Bader provided the `argp' function family to support hierachical command line argument parsing, layered on top of getopt. * strtod accepts new hexadecimal floating-point format from ISO C 9X. * printf has two new specifiers %a and %A to print hexadecimal flaoting-point numbers. * scanf recognizes the %a and %A format for scanning floating point numbers. * the new headers and from ISO C 9X provides information and interfaces for the available integer types. * about 130 new math functions were added to implement the ISO C9x math library. * the new header contains definitions of the complex math functions from ISO C 9X. * the new header defines generic macros to use complex or real valued functions. * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2. * Andreas Jaeger provided a test suite for the math library. * Mark Kettenis implemented the utmpx interface and an utmp daemon. * Ulrich Drepper added character set conversion functions (iconv). * Optimized string functions have been added. * The localedata addon is now part of glibc. * An implementation of profiling shared libraries was added by Ulrich Drepper. * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching daemon for NSS (nscd). Missing a better place here are some numbers on improvements. Under Linux 2.1.125 un-tar-ing the kernel sources takes user system wall using local files 12.19s 6.88s 22.91s using NIS 13.92s 8.91s 26.34s using NIS & nscd 10.37s 7.34s 25.30s using NIS+ 27.57s 30.37s 640.46s using NIS+ & nscd 10.25s 7.83s 26.51s using NIS & old nscd [1] 13.83s 8.32s 29.60s Keep in mind that non-namelookup related operations dominate above times. It was just a common complain that using NIS+ unpacking the kernel is horribly slow. [1] The old nscd implementation is not available anymore since it was distributed with glibc up to version 2.0.98 and thus is now replaced. * Tim Waugh provided an implementation of the POSIX.2 wordexp function family. * Mark Kettenis provided a Hesiod NSS module. * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper). * rcmd can now handle netgroups (Dick Streefland). * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott Bambrough. * Support for the IPv6 protocol has been added to the socket API, as per the latest draft standards. * Support for Linux 2.2 has been added. * Interface changes relative to the latest 2.0.x release: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ addseverity NEW: Unix98 alphasort64 NEW: LFS argp_err_exit_status NEW: argp, GNU ext argp_error NEW: argp, GNU ext argp_failure NEW: argp, GNU ext argp_help NEW: argp, GNU ext argp_parse NEW: argp, GNU ext argp_program_bug_address NEW: argp, GNU ext argp_program_version NEW: argp, GNU ext argp_program_version_hook NEW: argp, GNU ext argp_state_help NEW: argp, GNU ext argp_usage NEW: argp, GNU ext authdes_create NEW: Secure RPC authdes_getucred NEW: Secure RPC authdes_pk_create NEW: Secure RPC backtrace NEW: GNU ext. backtrace_symbols NEW: GNU ext. backtrace_symbols_fd NEW: GNU ext. cacos NEW: ISO C 9x cacosf NEW: ISO C 9x cacosh NEW: ISO C 9x cacoshf NEW: ISO C 9x cacoshl NEW: ISO C 9x cacosl NEW: ISO C 9x capget NEW: kernel capset NEW: kernel carg NEW: ISO C 9x cargf NEW: ISO C 9x cargl NEW: ISO C 9x casin NEW: ISO C 9x casinf NEW: ISO C 9x casinh NEW: ISO C 9x casinhf NEW: ISO C 9x casinhl NEW: ISO C 9x casinl NEW: ISO C 9x catan NEW: ISO C 9x catanf NEW: ISO C 9x catanh NEW: ISO C 9x catanhf NEW: ISO C 9x catanhl NEW: ISO C 9x catanl NEW: ISO C 9x cbc_crypt NEW: Secure RPC ccos NEW: ISO C 9x ccosf NEW: ISO C 9x ccosh NEW: ISO C 9x ccoshf NEW: ISO C 9x ccoshl NEW: ISO C 9x ccosl NEW: ISO C 9x cexp NEW: ISO C 9x cexpf NEW: ISO C 9x cexpl NEW: ISO C 9x cimag NEW: ISO C 9x cimagf NEW: ISO C 9x cimagl NEW: ISO C 9x clearerr_locked REMOVED clntunix_create NEW: sunrpc ext clog NEW: ISO C 9x clog10 NEW: ISO C 9x clog10f NEW: ISO C 9x clog10l NEW: ISO C 9x clogf NEW: ISO C 9x clogl NEW: ISO C 9x conj NEW: ISO C 9x conjf NEW: ISO C 9x conjl NEW: ISO C 9x cpow NEW: ISO C 9x cpowf NEW: ISO C 9x cpowl NEW: ISO C 9x cproj NEW: ISO C 9x cprojf NEW: ISO C 9x cprojl NEW: ISO C 9x creal NEW: ISO C 9x crealf NEW: ISO C 9x creall NEW: ISO C 9x creat64 NEW: LFS csin NEW: ISO C 9x csinf NEW: ISO C 9x csinh NEW: ISO C 9x csinhf NEW: ISO C 9x csinhl NEW: ISO C 9x csinl NEW: ISO C 9x csqrt NEW: ISO C 9x csqrtf NEW: ISO C 9x csqrtl NEW: ISO C 9x ctan NEW: ISO C 9x ctanf NEW: ISO C 9x ctanh NEW: ISO C 9x ctanhf NEW: ISO C 9x ctanhl NEW: ISO C 9x ctanl NEW: ISO C 9x des_setparity NEW: Secure RPC ecb_crypt NEW: Secure RPC endutxent NEW: Unix98 exp10 NEW: ISO C 9x exp10f NEW: ISO C 9x exp10l NEW: ISO C 9x exp2 NEW: ISO C 9x exp2f NEW: ISO C 9x exp2l NEW: ISO C 9x fattach NEW: STREAMS fdetach NEW: STREAMS fdim NEW: ISO C 9x fdimf NEW: ISO C 9x fdiml NEW: ISO C 9x feclearexcept NEW: ISO C 9x fegetenv NEW: ISO C 9x fegetexceptflag NEW: ISO C 9x fegetround NEW: ISO C 9x feholdexcept NEW: ISO C 9x feof_locked REMOVED feraiseexcept NEW: ISO C 9x ferror_locked REMOVED fesetenv NEW: ISO C 9x fesetexceptflag NEW: ISO C 9x fesetround NEW: ISO C 9x fetestexcept NEW: ISO C 9x feupdateenv NEW: ISO C 9x fflush_locked REMOVED ffsl NEW: GNU ext. ffsll NEW: GNU ext. fgetpos64 NEW: LFS fgets_unlocked NEW: GNU ext. fileno_locked REMOVED fma NEW: ISO C 9x fmaf NEW: ISO C 9x fmal NEW: ISO C 9x fmax NEW: ISO C 9x fmaxf NEW: ISO C 9x fmaxl NEW: ISO C 9x fmin NEW: ISO C 9x fminf NEW: ISO C 9x fminl NEW: ISO C 9x fmtmsg NEW: Unix98 fopen64 NEW: LFS fputc_locked REMOVED fputs_unlocked NEW: GNU ext. fread_unlocked NEW: GNU ext. freopen64 NEW: LFS fseeko NEW: Unix98 fsetpos64 NEW: LFS fstatfs64 NEW: LFS fstatvfs NEW: Unix98 fstatvfs64 NEW: LFS ftello NEW: Unix98 ftello64 NEW: LFS ftruncate64 NEW: LFS ftw64 NEW: LFS fwrite_unlocked NEW: GNU ext. gai_strerror NEW: IPv6 gamma_r REMOVED gammaf_r REMOVED gammal_r REMOVED getchar_locked REMOVED getdate NEW: Unix98 getdate_err NEW: Unix98 getdate_r NEW: GNU ext. getmsg NEW: STREAMS getnameinfo NEW: IPv6 getnetname NEW: Secure RPC getpmsg NEW: STREAMS getpt NEW: Unix98 PTY getrlimit64 NEW: LFS getutxent NEW: Unix98 getutxid NEW: Unix98 getutxline NEW: Unix98 glob64 NEW: GNU ext. globfree64 NEW: GNU ext. gnu_get_libc_release NEW: GNU ext. gnu_get_libc_version NEW: GNU ext. grantpt NEW: Unix98 PTY host2netname NEW: Secure RPC iconv NEW: iconv iconv_close NEW: iconv iconv_open NEW: iconv if_freenameindex NEW: IPv6 if_indextoname NEW: IPv6 if_nameindex NEW: IPv6 if_nametoindex NEW: IPv6 in6addr_any NEW: IPv6 in6addr_loopback NEW: IPv6 inet6_isipv4mapped NEW: IPv6 isastream NEW: STREAMS iswblank NEW: GNU ext. key_decryptsession NEW: Secure RPC key_decryptsession_pk NEW: Secure RPC key_encryptsession NEW: Secure RPC key_encryptsession_pk NEW: Secure RPC key_gendes NEW: Secure RPC key_get_conv NEW: Secure RPC key_secretkey_is_set NEW: Secure RPC key_setnet NEW: Secure RPC key_setsecret NEW: Secure RPC llrint NEW: ISO C 9x llrintf NEW: ISO C 9x llrintl NEW: ISO C 9x llround NEW: ISO C 9x llroundf NEW: ISO C 9x llroundl NEW: ISO C 9x log2 NEW: ISO C 9x log2f NEW: ISO C 9x log2l NEW: ISO C 9x lrint NEW: ISO C 9x lrintf NEW: ISO C 9x lrintl NEW: ISO C 9x lround NEW: ISO C 9x lroundf NEW: ISO C 9x lroundl NEW: ISO C 9x lseek64 NEW: LFS makecontext NEW: Unix98 mempcpy NEW: GNU ext. mmap64 NEW: LFS moncontrol REMOVED modify_ldt NEW: kernel nan NEW: ISO C 9x nanf NEW: ISO C 9x nanl NEW: ISO C 9x nearbyint NEW: ISO C 9x nearbyintf NEW: ISO C 9x nearbyintl NEW: ISO C 9x netname2host NEW: Secure RPC netname2user NEW: Secure RPC nexttoward NEW: ISO C 9x nexttowardf NEW: ISO C 9x nexttowardl NEW: ISO C 9x nftw NEW: Unix98 nftw64 NEW: LFS open64 NEW: LFS passwd2des NEW: Secure RPC pow10 NEW: GNU ext. pow10f NEW: GNU ext. pow10l NEW: GNU ext. pread NEW: Unix98 pread64 NEW: LFS printf_size NEW: GNU ext. printf_size_info NEW: GNU ext. profil_counter REMOVED pthread_mutexattr_getkind_np REPLACED pthread_mutexattr_setkind_np REPLACED ptsname NEW: Unix98 PTY ptsname_r NEW: Unix98 PTY putc_locked REMOVED putchar_locked REMOVED putgrent NEW: GNU ext. putmsg NEW: STREAMS putpmsg NEW: STREAMS pututxline NEW: Unix98 pwrite NEW: Unix98 pwrite64 NEW: LFS readdir64 NEW: LFS readdir64_r NEW: LFS remquo NEW: ISO C 9x remquof NEW: ISO C 9x remquol NEW: ISO C 9x round NEW: ISO C 9x roundf NEW: ISO C 9x roundl NEW: ISO C 9x rtime NEW: GNU ext. scalbln NEW: ISO C 9x scalblnf NEW: ISO C 9x scalblnl NEW: ISO C 9x scandir64 NEW: LFS sendfile NEW: kernel setcontext NEW: Unix98 setrlimit64 NEW: LFS setutxent NEW: Unix98 sighold NEW: Unix98 sigignore NEW: Unix98 sigqueue NEW: POSIX.1b sigrelse NEW: Unix98 sigset NEW: POSIX.1b sigtimedwait NEW: POSIX.1b sigwaitinfo NEW: POSIX.1b sincos NEW: GNU ext. sincosf NEW: GNU ext. sincosl NEW: GNU ext. statfs64 NEW: LFS statvfs NEW: Unix98 statvfs64 NEW: LFS strcasestr NEW: GNU ext. strtoimax NEW: ISO C 9x strtoumax NEW: ISO C 9x strverscmp NEW: GNU ext. svcauthdes_stats NEW: Secure RPC svcunix_create NEW: sunrpc etx svcunixfd_create NEW: sunrpc ext swapcontext NEW: Unix98 tcgetsid NEW: Unix98 PTY tdestroy NEW: GNU ext. tgamma NEW: ISO C 9x tgammaf NEW: ISO C 9x tgammal NEW: ISO C 9x tmpfile64 NEW: LFS trunc NEW: ISO C 9x truncate64 NEW: LFS truncf NEW: ISO C 9x truncl NEW: ISO C 9x umount2 NEW: kernel unlockpt NEW: Unix98 PTY updwtmpx NEW: Unix98 user2netname NEW: Secure RPC utmpxname NEW: Unix98 versionsort NEW: GNU ext. versionsort64 NEW: GNU ext. waitid NEW: Unix98 wcscasecmp NEW: GNU ext. wcsncasecmp NEW: GNU ext. wcsnlen NEW: GNU ext. wcstoimax NEW: ISO C 9x wcstoll NEW: ISO C 9x wcstoull NEW: ISO C 9x wcstoumax NEW: ISO C 9x wcswcs NEW: Unix98 wordexp NEW: POSIX.2 wordfree NEW: POSIX.2 write_profiling REMOVED xdecrypt NEW: Secure RPC xdr_authdes_cred NEW: Secure RPC xdr_authdes_verf NEW: Secure RPC xdr_cryptkeyarg NEW: Secure RPC xdr_cryptkeyarg2 NEW: Secure RPC xdr_cryptkeyres NEW: Secure RPC xdr_getcredres NEW: Secure RPC xdr_key_netstarg NEW: Secure RPC xdr_key_netstres NEW: Secure RPC xdr_keybuf NEW: Secure RPC xdr_keystatus NEW: Secure RPC xdr_netnamestr NEW: Secure RPC xdr_sizeof NEW: Secure RPC xdr_unixcred NEW: sunrpc ext xencrypt NEW: Secure RPC ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Version 2.0.6 * more bug fixes Version 2.0.5 * more bug fixes * inet_ntoa is thread-safe * updwtmp is moved from libutil to libc * rewrite of cbrt function * update of timezone data Version 2.0.4 * more bug fixes Version 2.0.3 * more bug fixes Version 2.0.2 * more bug fixes * add atoll function * fix complex problems in Berkeley DB code * fix math functions Version 2.0.1 * fixed lots of header problems (especially Linux/GNU specific) * dynamic loader preserves all registers * Roland McGrath provided support for handling of auxiliary objects in the ELF dynamic loader. * support for parallel builds is improved Version 2.0 * GNU extensions are no longer declared by default. To enable them you must define the macro `_GNU_SOURCE' in your program or compile with `-D_GNU_SOURCE'. * The library has changed from using GNU ld symbol aliases to using weak symbols where available. The ELF object file format supports weak symbols; GNU ld also supports weak symbols in the a.out format. (There is also now support for other GNU ld extensions in ELF. Use the `--with-elf' option to configure to indicate you have ELF, and `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion of many files which contained only symbol aliases, reducing the size of the source and the compiled library; many other files were renamed to less cryptic names previously occupied by the symbol alias files. There is a new header file for programs which operate on files in the ELF format. * Converted to Autoconf version 2, so `configure' has more options. Run `configure --help' to see the details. * The library can now be configured to build profiling, highly-optimized (but undebuggable), and/or shared libraries (ELF with GNU ld only). The `--enable-profile', `--enable-omitfp', and `--enable-shared' options to `configure' enable building these extra libraries. The shared library is built by default when using both ELF and GNU ld. When shared libraries are enabled, the new library `-ldl' is available for arbitrary run-time loading of shared objects; its interface is defined in . The new header file gives access to the internals of the run-time dynamic linker, `ld.so'. The shell script `ldd' is similar to the application of same name on other systems and it provides information about dynamically linked binaries. * The C library now provides the run-time support code for profiling executables compiled with `-pg'. Programs can control the profiling code through the interface in . The `gmon.out' files written by the GNU C library can be read only by GNU `gprof' (from GNU binutils); the support for this file format was contributed by David Mosberger-Tang. * The math code has been replaced with a math library based on fdlibm from Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by Ian Taylor with `float' functions and by Ulrich Drepper with `long double' functions. The math functions now reside in a separate library, so programs using them will need to use `-lm' their linking commands. * John C. Bowman contributed optimized ix87 assembler inline functions. * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf' mechanism similar to that found in Solaris 2. This is now used for the group, passwd, hosts, networks, services, protocols, rpc, ethers, shadow, netgroup, publickey, and alias databases. The `nsswitch.conf' file controls what services are used for each individual database. This works by loading shared libraries with names specified in `nsswitch.conf', so service modules can be changed or added at any time without even relinking any program. Currently there are the file, db, and NIS based NSS services available. * The new functions `strtoq' and `strtouq' parse integer values from strings, like `strtol' and `strtoul', but they return `long long int' and `unsigned long long int' values, respectively (64-bit quantities). * The new functions `strtof' and `strtold' parse floating-point values from strings, like `strtod', but they return `float' and `long double' values, respectively (on some machines `double' and `long double' are the same). * Ulrich Drepper has contributed new implementations of the floating-point printing and reading code used in the `printf' family of functions and `strtod', `strtof', and `strtold'. These new functions are perfectly accurate, and much faster than the old ones. * The implementation of the POSIX locale model was completely rewritten by Ulrich Drepper. This includes the new programs `localedef' and `locale' to compile the POSIX locale definition. * The former dummy implementations of the strcoll and strxfrm function are now replaced by fully functional code contributed by Ulrich Drepper. The collation information comes from the POSIX locale definitions. * The new header defines an interface for accessing various locale-dependent data (using the locale chosen with `setlocale'). * Ulrich Drepper has contributed a new suite of functions for operation on wide-character and multibyte-character strings, in ; and classification and case conversion of wide characters, in . These new functions are conforming to the ISO C, Amendement 1 specification. * There is now a second implementation of the standard I/O library available. It comes from GNU libg++ as was written by Per Bothner, heavily modified by Hongjiu Lu and made thread safe by Ulrich Drepper. * You can now use positional parameter specifications in format strings for the `printf' and `scanf' families of functions. For example, `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints ``Number 6, Mr Jones''. This is mainly useful when providing different format strings for different languages, whose grammars may dictate different orderings of the values being printed. To support this feature, the interface for `register_printf_handler' has changed; see the header file for details. * The `printf' and `scanf' families of functions now understand a new formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says to group numbers as indicated by the locale; for `scanf' and friends, this says to accept as valid only a number with all the proper grouping separators in the right places. In the default "C" locale, numbers are not grouped; but locales for specific countries will define the usual conventions (i.e. separate thousands with `,' in the US locale). * The pgrp functions have been regularized, slightly incompatibly but much less confusingly. The core functions are now `getpgid' and `setpgid', which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no argument) and BSD `setpgrp' (identical to `setpgid') functions are provided for compatibility. There is no longer an incompatible `getpgrp' with an argument declared under _BSD_SOURCE; no BSD code uses it. * The new header file and suite of functions simplify programs that operate on directory trees. This code comes from 4.4 BSD. * The resolver code has been updated from the BIND 4.9.5-P1 release. Parts of the code were heavily modified by Ulrich Drepper to fit in the NSS scheme used in glibc. * There is a new malloc debugging hook `__memalign_hook'. * There are new typedefs `ushort' for `unsigned short int' and `uint' for `unsigned int' in . These are for compatibility only and their use is discouraged. * The `-lmcheck' library to enable standard malloc debugging hooks is now done differently, so that it works even without GNU ld. * New function `euidaccess' checks allowed access to a file like `access', but using the effective IDs instead of the real IDs. * The time zone data files have been updated for the latest and greatest local time conventions of the countries of the world. * The new function `dirfd' extracts the file descriptor used by a DIR stream; see . * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface for formatting floating-point numbers. They are provided only for compatibility; new programs should use `sprintf' instead. There are also equivalent function for the `long double' floating-point type and all functions also exist in a reentrant form. * The new auxiliary library `-lutil' from 4.4 BSD contains various functions for maintaining the login-record files (primarily of use to system programs such as `login'), and convenient functions for allocating and initializing a pseudo-terminal (pty) device. * Ulrich Drepper has contributed new support for System V style shared memory and IPC on systems that support it. * Ulrich Drepper has contributed several miscellaneous new functions found in System V: The `hsearch' family of functions provide an effective implementation of hash tables; `a64l' and `l64a' provide a very simple binary to ASCII mapping; `drand48' and friends provide a 48-bit random number generator. * Ulrich Drepper has contributed new reentrant counterparts for the `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc. * Ulrich Drepper has contributed new, highly-optimized versions of several string functions for the i486/Pentium family of processors. * Ulrich Drepper has updated the Linux-specific code, based largely on work done in Hongjiu Lu's version of GNU libc for Linux. The GNU library now supports Linux versions 2.0.10 and later, using the ELF object file format (i[3456]86-*-linux). * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux). * David Mosberger-Tang and Richard Henderson have ported the C library to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the dynamic linking support for ELF/Alpha. * Richard Henderson contributed several Alpha optimized assembler function for arithmetic and string handling. * Ulrich Drepper has contributed a new set of message catalog functions to support multiple languages using the interface, for use with his new package GNU gettext. Translation volunteers have contributed catalogs of the library's messages in Spanish, German, and Korean. * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat' program and the `catgets' function for reading the catalog files it creates. (The interface is preferred; we include the interface using `catgets' only for source compatibility with programs already written to use it.) * New header file gives SVID-compatible names for constants. * Various new macros, declarations, and small header files for compatibility with 4.4 BSD. * New function `group_member' is a convenient way to check if a process has a given effective group ID. * When using GCC 2.7 and later, the socket functions are now declared in a special way so that passing an argument of type `struct sockaddr_in *', `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic `struct sockaddr *' type, does not generate a type-clash warning. * New function `error' declared in header file is a convenient function for printing error messages and optionally exiting; this is the canonical function used in GNU programs. The new functions `err', `warn', and friends in header file are the canonical 4.4 BSD interface for doing the same thing. * The interface has several new flags from 4.4 BSD that extend the POSIX.2 `glob' function to do ~ and {...} expansion. * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD. `clearenv' which is used in POSIX.9 is also available. * New function `getsid' returns session ID number on systems that support it. * We have incorporated the 4.4 BSD `db' library (version 1.85). New header files and provide a rich set of functions for several types of simple databases stored in memory and in files, and is an old `ndbm'-compatible interface using the `db' functions. Link with `-ldb' to get these functions. * New macro `strdupa' copies a string like `strdup', but uses local stack space from `alloca' instead of dynamic heap space from `malloc'. * New function `strnlen' is like `strlen' but searches only a given maximum number of characters for the null terminator. `stpncpy', `strndup' and `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa' function. * New function `statfs' in header . * The new and interfaces contributed by Miles Bader provide convenient functions for operating on blocks of null-terminated strings. * A new suite of functions in handle all the details of reading and writing the utmp file. * An implementation of the NIS/YP(tm) based NSS service was contributed by Thorsten Kukuk. * Paul Eggert and Ulrich Drepper modified the `strftime' function to be completely POSIX compliant and also implemented the extended functionality to handle alternate digit representation and alternate era date formats. * Ulrich Drepper provided an implementation of the `strptime' function defined in XPG4.2 which transforms a string into a `struct tm' value. * Paul Eggert provided the tzselect shell script as part of the timezone code. The shell script makes it easy to select the correct timezone specification. * The implementation of the malloc family of functions is completely replaced by a new implementation by Doug Lea with many improvements by Wolfram Gloger. The implementation uses the mmap function (if available) and it is optimized for the use in multi threaded programs. * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of functions. This new functionality is usable by specifying a special salt string and it is compatible with implementation on *BSD systems. * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper: `getsubopt' to handle second level command line options, `bsd_signal' to access BSD style `signal' functionality, the obsolete `regexp' style expression matcher. * the `lchown' function is available on system which support this functionality. * The implementation of the shadow password handling function was contributed by Ulrich Drepper. * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe. * POSIX.1g support was added. The header is available, `isfdtype' and `pselect' are implemented. Craig Metz contributed an implementation of `getaddrinfo'. Version 1.09 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'. * New header file and new functions `getfsspec', `getfsent' and friends, for parsing /etc/fstab. This code comes from 4.4 BSD. * The new function `daemon' from 4.4 BSD is useful for server programs that want to put themselves in the background. * Joel Sherrill has contributed support for several standalone boards that run without an operating system. * `printf', `scanf' and friends now accept a `q' type modifier for long long int as well as `ll'. Formats using these might be `%qu' or `%lld'. * All of the code taken from BSD (notably most of the math and networking routines) has been updated from the BSD 4.4-Lite release. * The resolver code has been updated from the BIND-4.9.3-BETA9 release. * The new functions `getdomainname' and `setdomainname' fetch or change the YP/NIS domain name. These are system calls which exist on systems which have YP (aka NIS). * The time zone data files have been updated for the latest international conventions. * The SunRPC programs `portmap' and `rpcinfo' are now installed in $(sbindir) (usually /usr/local/sbin) instead of $(bindir). Version 1.08 * The C library now includes support for Sun RPC, from Sun's free RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs are included. (There is still no support for YP.) * Tom Quinn has contributed a port of the C library to SGI machines running Irix 4 (mips-sgi-irix4). * The new `lockf' function is a simplified interface to the locking facilities of `fcntl', included for compatibility. * New time functions `timegm', `timelocal', and `dysize' for compatibility. * New header file and new function `ftime' for compatibility. * New header files and and new function `poll' for compatibility. * The error message printed by `assert' for a failed assertion now includes the name of the program (if using GNU ld) and the name of the calling function (with versions of GCC that support this). * The `psignal' function is now declared in , not . * The library now includes the header file and memory management functions `mmap', `munmap', `mprotect', `msync', and `madvise', on systems that support those facilities. * The interface for `mcheck' has changed slightly: the function called to abort the program when an allocation inconsistency is detected now takes an argument that indicates the type of failure. The new function `mprobe' lets you request a consistency check for a particular block at any time (checks are normally done only when you call `free' or `realloc' on a block). * It is now possible to easily cross-compile the C library, building on one system a library to run on another machine and/or operating system. All you need to do is set the variable `HOST_CC' in `configparms' to the native compiler for programs to run on the machine you are building on (a few generator programs are used on Unix systems); set `CC' to the cross-compiler. * The new function `fexecve' (only implemented on the GNU system) executes a program file given a file descriptor already open on the file. Version 1.07 * Brendan Kehoe has contributed most of a port to the DEC Alpha running OSF/1 (alpha-dec-osf1). He says it is 75% complete. * You can set the variable `libprefix' in `configparms' to specify a prefix to be prepended to installed library files; this makes it easy to install the GNU C library to be linked as `-lgnuc' or whatever. * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It copies a limited number of characters from a string, and returns the address of the last character written. * You no longer need to check for whether the installed `stddef.h' is compatible with the GNU C library. configure now checks for you. * You can now define a per-stream `fileno' function to convert the stream's cookie into an integral file descriptor. * ``malloc (0)'' no longer returns a null pointer. Instead, it allocates zero bytes of storage, and returns a unique pointer which you can pass to `realloc' or `free'. The behavior is undefined if you dereference this pointer. * The C library now runs on Sony NEWS m68k machines running either NewsOS 3 or NewsOS 4. * The new `syscall' function is a system-dependent primitive function for invoking system calls. It has the canonical behavior on Unix systems, including unreliable return values for some calls (such as `pipe', `fork' and `getppid'). * The error code `EWOULDBLOCK' is now obsolete; it is always defined to `EAGAIN', which is the preferred name. On systems whose kernels use two distinct codes, the C library now translates EWOULDBLOCK to EAGAIN in every system call function. Version 1.06 * The GNU C Library Reference Manual is now distributed with the library. `make dvi' will produce a DVI file of the printed manual. `make info' will produce Info files that you can read on line using C-h i in Emacs or the `info' program. Please send comments on the manual to bug-glibc-manual@gnu.org. * The library now supports SVR4 on i386s (i386-unknown-sysv4). * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2. * Jason Merrill has contributed a port to the Sequent Symmetry running Dynix version 3 (i386-sequent-dynix). * The library has been ported to i386s running SCO 3.2.4 (also known as SCO ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2). * New function `memory_warnings' lets you arrange to get warnings when malloc is running out of memory to allocate, like Emacs gives you. * The C library now contains the relocating allocator used in Emacs 19 for its editing buffers. This allocator (ralloc) minimizes allocation overhead and fragmentation by moving allocated regions around whenever it needs to. You always refer to a ralloc'd region with a "handle" (a pointer to a pointer--an object of type `void **'). * There is a new `printf' format: `%m' gives you the string corresponding to the error code in `errno'. * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s' or `%[' conversion, but instead of filling in a fixed-sized buffer you pass, the `a' modifier says to fill in a `char **' you pass with a malloc'd string. * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching. * `mkstemp' is a traditional Unix function to atomically create and open a uniquely-named temporary file. Version 1.05 * The standard location for the file that says what the local timezone is has changed again. It is now `/usr/local/etc/localtime' (or more precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'. * The distribution no longer contains any files with names longer than 14 characters. * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE. These are set by the new `trusted' and `console' keywords in `/etc/ttys'. * New functions `ttyslot' and `syslog' from 4.4 BSD. Version 1.04 * The configuration process has changed quite a bit. The `configure' script is now used just like the configuration scripts for other GNU packages. The `sysdeps' directory hierarchy is much rearranged. The file `INSTALL' explains the new scheme in detail. * The header files no longer need to be processed into ANSI C and traditional C versions. There is just one set of files to install, and it will work with ANSI or old C compilers (including `gcc -traditional'). * Brendan Kehoe and Ian Lance Taylor have ported the library to the MIPS DECStation running Ultrix 4. * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries. Tom Quinn contributed the initial code. The GNU C library can NOT yet be made itself into a shared library. * Yet further improved support for the i386, running 4.3 BSD-like systems (such as Mach 3 with the Unix single-server), or System V. * New function `strncasecmp' to do case-insensitive string comparison with limited length. * New function `strsep' is a reentrant alternative to `strtok'. * New functions `scandir' and `alphasort' for searching directories. * New function `setenv' is a better interface to `putenv'. * Ian Lance Taylor has contributed an implementation of the SVID `ftw' function for traversing a directory tree. * The GNU obstack package is now also part of the C library. The new function `open_obstack_stream' creates a stdio stream that writes onto an obstack; `obstack_printf' and `obstack_vprintf' do formatted output directly to an obstack. * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only), cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid. * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'. * The new functions `strfry' and `memfrob' do mysterious and wonderful things to your strings. * There are some new test programs: test-fseek, testmb, and testrand. * Some work has been done to begin porting the library to 4.4 BSD and Linux. These ports are not finished, but are a good starting place for really supporting those systems. * `/etc/localtime' is now the standard location for the file that says what the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'. This follows the general principle that `/etc' is the place for all local configuration files. * The C library header files now use `extern "C"' when used by the C++ compiler, so the C library should now work with C++ code. * The header file is gone. now declares bcopy, bcmp, bzero, and ffs. (Update: nowadays these functions are declared in .) * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting function which uses the `merge sort' algorithm, and is said to be significantly faster than the old GNU `qsort' function. Merge sort is now the standard `qsort' function. The new algorithm can require a lot of temporary storage; so, the old sorting function is called when the required storage is not available. * The C library now includes Michael Glad's Ultra Fast Crypt, which provides the Unix `crypt' function, plus some other entry points. * The code and header files taken from 4.4 BSD have been updated with the latest files released from Berkeley. ---------------------------------------------------------------------- Copying conditions: Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn. Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. Local variables: version-control: never fill-column: 72 End: