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* add basic dns record parsing functionsRich Felker2014-12-171-35/+23
| | | | | | | | | | | | based on patch by Timo Teräs, with some corrections to bounds checking code and other minor changes. while they are borderline scope creep, the functions added are fairly small and are roughly the minimum code needed to use the results of the res_query API without re-implementing error-prone DNS packet parsing, and they are used in practice by some kerberos related software and possibly other things. at this time there is no intent to implement further nameser.h API functions.
* don't shadow functions with macros in C++Bobby Bingham2014-12-093-0/+6
| | | | | | | | | | C++ programmers typically expect something like "::function(x,y)" to work and may be surprised to find that "(::function)(x,y)" is actually required due to the headers declaring a macro version of some standard functions. We already omit function-like macros for C++ in most cases where there is a real function available. This commit extends this to the remaining function-like macros which have a real function version.
* suppress macro definitions of ctype functions under C++Rich Felker2014-10-143-0/+7
| | | | based on patch by Sergey Dmitrouk.
* implement uchar.h (C11 UTF-16/32 conversion) interfacesRich Felker2014-10-133-5/+30
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* add new linux file sealing api to fcntl.hSzabolcs Nagy2014-10-081-0/+7
| | | | | | | | | | | | | | | | | new in linux v3.17 commit 40e041a2c858b3caefc757e26cb85bfceae5062b sealing allows some operations to be blocked on a file which makes file access safer when fds are shared between processes (only supported for shared mem fds currently) flags: F_SEAL_SEAL prevents further sealing F_SEAL_SHRINK prevents file from shrinking F_SEAL_GROW prevents file from growing F_SEAL_WRITE prevents writes fcntl commands: F_GET_SEALS get the current seal flags F_ADD_SEALS add new seal flags
* add new IPV6_AUTOFLOWLABEL socket option in netinet/in.hSzabolcs Nagy2014-10-081-0/+1
| | | | | added in linux v3.17 commit 753a2ad54ef45e3417a9d49537c2b42b04a2e1be enables automatic flow label generation on transmit
* add _DEFAULT_SOURCE feature profile as an alias for _BSD_SOURCERich Felker2014-09-101-0/+4
| | | | | | | | | | | | | | | | | | | | | | | as a result of commit ab8f6a6e42ff893041f7545a23e6d6a0edde07fb, this definition is now equivalent to the actual "default profile" which appears immediately below in features.h, and which defines both _BSD_SOURCE and _XOPEN_SOURCE. the intent of providing a _DEFAULT_SOURCE, which glibc also now provides, is to give applications a way to "get back" the default feature profile when it was lost either by compiler flags that inhibit it (such as -std=c99) or by library-provided predefined macros (such as -D_POSIX_C_SOURCE=200809L) which may inhibit exposure of features that were otherwise visible by default and which the application may need. without _DEFAULT_SOURCE, the application had encode knowledge of a particular libc's defaults, and such knowledge was fragile and subject to bitrot. eventually the names _GNU_SOURCE and _BSD_SOURCE should be phased out in favor of the more-descriptive and more-accurate _ALL_SOURCE and _DEFAULT_SOURCE, leaving the old names as aliases but using the new ones internally. however this is a more invasive change that would require extensive regression testing, so it is deferred.
* fix _ALL_SOURCE logic to avoid possible redefinition of _GNU_SOURCERich Felker2014-09-101-1/+1
| | | | | this could be an error if _GNU_SOURCE was already defined differently by the application.
* fix places where _BSD_SOURCE failed to yield a superset of _XOPEN_SOURCERich Felker2014-09-104-8/+2
| | | | | | | | | | | the vast majority of these failures seem to have been oversights at the time _BSD_SOURCE was added, or perhaps shortly afterward. the one which may have had some reason behind it is omission of setpgrp from the _BSD_SOURCE feature profile, since the standard setpgrp interface conflicts with a legacy (pre-POSIX) BSD interface by the same name. however, such omission is not aligned with our general policy in this area (for example, handling of similar _GNU_SOURCE cases) and should not be preserved.
* add new F_OFD_* macros to fcntl.h (open file description locks)Szabolcs Nagy2014-09-081-0/+4
| | | | | | | | | open file description locks are inherited across fork and only auto dropped after the last fd of the file description is closed, they can be used to synchronize between threads that open separate file descriptions for the same file. new in linux 3.15 commit 0d3f7a2dd2f5cf9642982515e020c1aee2cf7af6
* add threads.h and needed per-arch types for mtx_t and cnd_tRich Felker2014-09-061-0/+85
| | | | | | | | | | | | | | | | based on patch by Jens Gustedt. mtx_t and cnd_t are defined in such a way that they are formally "compatible types" with pthread_mutex_t and pthread_cond_t, respectively, when accessed from a different translation unit. this makes it possible to implement the C11 functions using the pthread functions (which will dereference them with the pthread types) without having to use the same types, which would necessitate either namespace violations (exposing pthread type names in threads.h) or incompatible changes to the C++ name mangling ABI for the pthread types. for the rest of the types, things are much simpler; using identical types is possible without any namespace considerations.
* add C11 timespec_get function, with associated time.h changes for C11Rich Felker2014-09-061-1/+3
| | | | | | based on patch by Jens Gustedt for inclusion with C11 threads implementation, but committed separately since it's independent of threads.
* fix macros for LFS *64_t types in sys/stat.h, sys/types.h, glob.hSzabolcs Nagy2014-09-053-2/+3
| | | | | | there is no blksize64_t (blksize_t is always long) but there are fsblkcnt64_t and fsfilcnt64_t types in sys/stat.h and sys/types.h. and glob.h missed glob64_t.
* add static_assert and hide noreturn, alignas, alignof from C++Szabolcs Nagy2014-08-273-0/+11
| | | | | add static_assert and protect the other new C11 keyword macros with #ifndef __cplusplus so they don't conflict with C++ keywords.
* add C11 floating-point characteristic macros to float.hSzabolcs Nagy2014-08-271-0/+7
| | | | C11 introduced *_DECIMAL_DIG and *_HAS_SUBNORM macros.
* add malloc_usable_size function and non-stub malloc.hRich Felker2014-08-251-0/+25
| | | | | | | | | | | | | | | | | | | | | | this function is needed for some important practical applications of ABI compatibility, and may be useful for supporting some non-portable software at the source level too. I was hesitant to add a function which imposes any constraints on malloc internals; however, it turns out that any malloc implementation which has realloc must already have an efficient way to determine the size of existing allocations, so no additional constraint is imposed. for now, some internal malloc definitions are duplicated in the new source file. if/when malloc is refactored to put them in a shared internal header file, these could be removed. since malloc_usable_size is conventionally declared in malloc.h, the empty stub version of this file was no longer suitable. it's updated to provide the standard allocator functions, nonstandard ones (even if stdlib.h would not expose them based on the feature test macros in effect), and any malloc-extension functions provided (currently, only malloc_usable_size).
* add max_align_t definition for C11 and C++11Rich Felker2014-08-201-0/+3
| | | | | | | | | | | | | | | | | unfortunately this needs to be able to vary by arch, because of a huge mess GCC made: the GCC definition, which became the ABI, depends on quirks in GCC's definition of __alignof__, which does not match the formal alignment of the type. GCC's __alignof__ unexpectedly exposes the an implementation detail, its "preferred alignment" for the type, rather than the formal/ABI alignment of the type, which it only actually uses in structures. on most archs the two values are the same, but on some (at least i386) the preferred alignment is greater than the ABI alignment. I considered using _Alignas(8) unconditionally, but on at least one arch (or1k), the alignment of max_align_t with GCC's definition is only 4 (even the "preferred alignment" for these types is only 4).
* fix CPU_EQUAL macro in sched.hSzabolcs Nagy2014-08-131-1/+1
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* add inline isspace in ctype.h as an optimizationSzabolcs Nagy2014-08-131-1/+6
| | | | | | | | | | | | | | | | | | | | | isspace can be a bottleneck in a simple parser, inlining it gives slightly smaller and faster code src/locale/pleval.o already had this optimization, the size change for other libc functions for i386 is src/internal/intscan.o 2134 2118 -16 src/locale/dcngettext.o 1562 1552 -10 src/network/res_msend.o 1961 1940 -21 src/network/lookup_name.o 2627 2608 -19 src/network/getnameinfo.o 1814 1811 -3 src/network/lookup_serv.o 643 624 -19 src/stdio/vfscanf.o 2675 2663 -12 src/stdlib/atoll.o 117 107 -10 src/stdlib/atoi.o 95 91 -4 src/stdlib/atol.o 95 91 -4 src/time/strptime.o 1515 1503 -12 (TOTALS) 432451 432321 -130
* make clearenv available with _BSD_SOURCEClément Vasseur2014-08-081-1/+1
| | | | | glibc declares clearenv under _BSD_SOURCE, some applications might depend on it being available this way.
* implement ffsl and ffsll functionsRich Felker2014-07-311-0/+2
| | | | | | per the resolution of Austin Group issue #617, these are accepted for XSI option in POSIX future and thus I'm treating them as standard functions.
* limit visibility of ffs function declaration to _XOPEN_SOURCERich Felker2014-07-311-0/+2
| | | | | per the standard, ffs is XSI shaded, whereas the other functions in this header are in the base.
* add new PR_SET_THP_DISABLE and PR_GET_THP_DISABLE prctl flagsSzabolcs Nagy2014-07-201-0/+3
| | | | | they can be used to set or query if transparent huge pages are disabled. introduced in linux 3.15 commit a0715cc22601e8830ace98366c0c2bd8da52af52
* add pacing rate information to the tcp_info struct in tcp.hSzabolcs Nagy2014-07-201-0/+2
| | | | | used by monitoring applications such as ss from iproute2 introduced in linux 3.15 commit 977cb0ecf82eb6d15562573c31edebf90db35163
* add new ethernet packet types ETH_P_80221, ETH_P_LOOPBACKSzabolcs Nagy2014-07-201-2/+4
| | | | | | | | | | ETH_P_80221 is ethertype for IEEE Std 802.21 - Media Independent Handover Protocol introduced in linux 3.15 commit b62faf3cdc875a1ac5a10696cf6ea0b12bab1596 ETH_P_LOOPBACK is the correct packet type for loopback in IEEE 802.3* introduced in linux 3.15 commit 61ccbb684421d374fdcd7cf5d6b024b06f03ce4e some defines were shuffled to be in ascending order and match the kernel header
* add issetugid function to check for elevated privilegeBrent Cook2014-07-191-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this function provides a way for third-party library code to use the same logic that's used internally in libc for suppressing untrusted input/state (e.g. the environment) when the application is running with privleges elevated by the setuid or setgid bit or some other mechanism. its semantics are intended to match the openbsd function by the same name. there was some question as to whether this function is necessary: getauxval(AT_SECURE) was proposed as an alternative. however, this has several drawbacks. the most obvious is that it asks programmers to be aware of an implementation detail of ELF-based systems (the aux vector) rather than simply the semantic predicate to be checked. and trying to write a safe, reliable version of issetugid in terms of getauxval is difficult. for example, early versions of the glibc getauxval did not report ENOENT, which could lead to false negatives if AT_SECURE was not present in the aux vector (this could probably only happen when running on non-linux kernels under linux emulation, since glibc does not support linux versions old enough to lack AT_SECURE). as for musl, getauxval has always properly reported errors, but prior to commit 7bece9c2095ee81f14b1088f6b0ba2f37fecb283, the musl implementation did not emulate AT_SECURE if missing, which would result in a false positive. since musl actually does partially support kernels that lack AT_SECURE, this was problematic. the intent is that library authors will use issetugid if its availability is detected at build time, and only fall back to the unreliable alternatives on systems that lack it. patch by Brent Cook. commit message/rationale by Rich Felker.
* add or1k (OpenRISC 1000) architecture portStefan Kristiansson2014-07-181-1/+37
| | | | | | | | | | | | | | | With the exception of a fenv implementation, the port is fully featured. The port has been tested in or1ksim, the golden reference functional simulator for OpenRISC 1000. It passes all libc-test tests (except the math tests that requires a fenv implementation). The port assumes an or1k implementation that has support for atomic instructions (l.lwa/l.swa). Although it passes all the libc-test tests, the port is still in an experimental state, and has yet experienced very little 'real-world' use.
* implement fmtmsg functionRich Felker2014-06-211-0/+47
| | | | | contributed by Isaac Dunham. this seems to be the last interface that was missing for complete POSIX 2008 base + XSI coverage.
* remove hack in syslog.h that resulted in aliasing violationsRich Felker2014-06-211-6/+2
| | | | | | | | | | | this issue affected the prioritynames and facilitynames arrays which are only provided when requested (usually by syslogd implementations) and which are presently defined as compound literals. the aliasing violation seems to have been introduced as a workaround for bad behavior by gcc's -Wwrite-strings option, but it caused compilers to completely optimize out the contents of prioritynames and facilitynames since, under many usage cases, the aliasing rules prove that the contents are never accessed.
* implement sendmmsg and recvmmsgRich Felker2014-06-191-0/+11
| | | | | | | these are not pure syscall wrappers because they have to work around kernel API bugs on 64-bit archs. the workarounds could probably be made somewhat more efficient, but at the cost of more complexity. this may be revisited later.
* add support for ipv6 scope_id to getaddrinfo and getnameinfoRich Felker2014-06-041-1/+1
| | | | | | | | | | | | | | | | | | | | for all address types, a scope_id specified as a decimal value is accepted. for addresses with link-local scope, a string containing the interface name is also accepted. some changes are made to error handling to avoid unwanted fallbacks in the case where the scope_id is invalid: if an earlier name lookup backend fails with an error rather than simply "0 results", this failure now suppresses any later attempts with other backends. in getnameinfo, a light "itoa" type function is added for generating decimal scope_id results, and decimal port strings for services are also generated using this function now so as not to pull in the dependency on snprintf. in netdb.h, a definition for the NI_NUMERICSCOPE flag is added. this is required by POSIX (it was previously missing) and needed to allow callers to suppress interface-name lookups.
* fix POSIX namespace pollution in sys/types.hSzabolcs Nagy2014-05-301-10/+6
| | | | int8_t, u_int8_t, etc types are moved under _BSD_SOURCE
* update netinet/in.h to match the current kernel uapiSzabolcs Nagy2014-05-301-1/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | from linux/in.h and linux/in6.h uapi headers the following missing socket options were added: IP_NODEFRAG - used with customized ipv4 headers IPV6_RECVPATHMTU - for ipv6 path mtu IPV6_PATHMTU - for ipv6 path mtu IPV6_DONTFRAG - for ipv6 path mtu IPV6_ADDR_PREFERENCES - RFC5014 Source Address Selection IPV6_MINHOPCOUNT - RFC5082 Generalized TTL Security Mechanism IPV6_ORIGDSTADDR - used by tproxy IPV6_RECVORIGDSTADDR - used by tproxy IPV6_TRANSPARENT - used by tproxy IPV6_UNICAST_IF - ipv6 version of IP_UNICAST_IF and socket option values: IP_PMTUDISC_OMIT - value for IP_MTU_DISCOVER option, new in linux 3.14 IPV6_PMTUDISC_OMIT - same for IPV6_MTU_DISCOVER IPV6_PMTUDISC_INTERFACE - ipv6 version of IP_PMTUDISC_INTERFACE IPV6_PREFER_* - flags for IPV6_ADDR_PREFERENCES not added: ipv6 flow info and flow label related definitions. (it's unclear if libc should define these and namespace polluting type name is involved so they are not provided for now)
* add SO_BPF_EXTENSIONS socket optionSzabolcs Nagy2014-05-301-0/+1
| | | | | this was introduced to query BPF extension support with getsockopt in linux 3.14, commit ea02f9411d9faa3553ed09ce0ec9f00ceae9885e
* add sched_{get,set}attr syscall numbers and SCHED_DEADLINE macroSzabolcs Nagy2014-05-301-0/+1
| | | | | | | | | | | | linux 3.14 introduced sched_getattr and sched_setattr syscalls in commit d50dde5a10f305253cbc3855307f608f8a3c5f73 and the related SCHED_DEADLINE scheduling policy in commit aab03e05e8f7e26f51dee792beddcb5cca9215a5 but struct sched_attr "extended scheduling parameters data structure" is not yet exported to userspace (necessary for using the syscalls) so related uapi definitions are not added yet.
* overhaul siginfo_t definition in signal.hRich Felker2014-05-241-23/+28
| | | | | | | | | | | | | | | | | | the main motivation for this change is that, with the previous definition, it was arguably illegal, in standard C, to initialize both si_value and si_pid/si_uid with designated initializers, due to the rule that only one member of a union can have an initializer. whether or not this affected real-world application code, it affected some internal code, and clang was producing warnings (and possibly generating incorrect code). the new definition uses a more complex hierarchy of structs and unions to avoid the need to initialize more than one member of a single union in usage cases that make sense. further work would be needed to eliminate even the ones with no practical applications. at the same time, some fixes are made to the exposed names for nonstandard fields, to match what software using them expects.
* remove unsupported nonstandard sysconf macros and their table entriesRich Felker2014-05-191-60/+0
| | | | | | | | | | | | | | | | | | | | | | some of these may have been from ancient (pre-SUSv2) POSIX versions; more likely, they were from POSIX drafts or glibc interpretations of what ancient versions of POSIX should have added (instead they made they described functionality mandatory and/or dropped it completely). others are purely glibc-isms, many of them ill-thought-out, like providing ways to lookup the min/max values of types at runtime (despite the impossibility of them changing at runtime and the impossibility of representing ULONG_MAX in a return value of type long). since our sysconf implementation does not support or return meaningful values for any of these, it's harmful to have the macros around; applications' build scripts may detect and attempt to use them, only to get -1/EINVAL as a result. if removing them does break some applications, and it's determined that the usage was reasonable, some of these could be added back on an as-needed basis, but they should return actual meaningful values, not junk like they were returning before.
* expose public execvpe interfaceM Farkas-Dyck2014-04-201-0/+1
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* fix RLIMIT_ constants for mipsSzabolcs Nagy2014-04-151-2/+5
| | | | | | | The mips arch is special in that it uses different RLIMIT_ numbers than other archs, so allow bits/resource.h to override the default RLIMIT_ numbers (empty on all archs except mips). Reported by orc.
* add getauxval functionRich Felker2014-04-071-0/+16
| | | | | | | in a sense this implementation is incomplete since it doesn't provide the HWCAP_* macros for use with AT_HWCAP, which is perhaps the most important intended usage case for getauxval. they will be added at a later time.
* implement hcreate_r, hdestroy_r and hsearch_rsin2014-04-021-0/+12
| | | | | | | | | | the size and alignment of struct hsearch_data are matched to the glibc definition for binary compatibility. the members of the structure do not match, which should not be a problem as long as applications correctly treat the structure as opaque. unlike the glibc implementation, this version of hcreate_r does not require the caller to zero-fill the structure before use.
* fix signal.h breakage from moving stack_t to arch-specific bitsRich Felker2014-03-181-0/+2
| | | | | | in the previous changes, I missed the fact that both the prototype of the sigaltstack function and the definition of ucontext_t depend on stack_t.
* move signal.h definition of stack_t to arch-specific bitsRich Felker2014-03-181-6/+0
| | | | | it's different at least on mips. mips version will be fixed in a separate commit to show the change.
* move struct semid_ds to from shared sys/sem.h to bitsRich Felker2014-03-111-16/+1
| | | | | | | | | | | | the definition was found to be incorrect at least for powerpc, and fixing this cleanly requires making the definition arch-specific. this will allow cleaning up the definition for other archs to make it more specific, and reversing some of the ugliness (time_t hacks) introduced with the x32 port. this first commit simply copies the existing definition to each arch without any changes. this is intentional, to make it easier to review changes made on a per-arch basis.
* math.h: make __FLOAT_BITS and __DOUBLE_BITS C89Szabolcs Nagy2014-03-091-2/+4
| | | | | Remove non-constant aggregate initializer. (Still using long long, but that is supported by ancient compilers without __extension__ anyway).
* in sys/procfs.h, avoid using __WORDSIZE macroRich Felker2014-03-081-1/+1
| | | | | | | this was problematic because several archs don't define __WORDSIZE. we could add it, but I would rather phase this macro out in the long term. in our version of the headers, UINTPTR_MAX is available here, so just use it instead.
* in.h: new IP_MTU_DISCOVER mode IP_PMTUDISC_INTERFACESzabolcs Nagy2014-02-251-0/+1
| | | | | introduced in linux v3.13, 482fc6094afad572a4ea1fd722e7b11ca72022a0 to mitigate dns cache poisoning via fragmentation
* if_ether.h: new ethernet protocol typeSzabolcs Nagy2014-02-251-0/+1
| | | | | for High-availability Seamless Redundancy (HSR) specified in IEC 62439-3 new in linux v3.13, f421436a591d34fa5279b54a96ac07d70250cc8d
* sys/socket.h: add the SO_MAX_PACING_RATE SOL_SOCKET optionSzabolcs Nagy2014-02-251-0/+1
| | | | introduced in linux v3.13, 62748f32d501f5d3712a7c372bbb92abc7c62bc7
* elf.h: add aarch64 relocationsSzabolcs Nagy2014-02-251-0/+111
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