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* fix failure of fchmod, fstat, fchdir, and fchown to produce EBADFRich Felker2013-12-194-4/+12
| | | | | | | | | | | | | | | | | | | the workaround/fallback code for supporting O_PATH file descriptors when the kernel lacks support for performing these operations on them caused EBADF to get replaced by ENOENT (due to missing entry in /proc/self/fd). this is unlikely to affect real-world code (calls that might yield EBADF are generally unsafe, especially in library code) but it was breaking some test cases. the fix I've applied is something of a tradeoff: it adds one syscall to these operations on kernels where the workaround is needed. the alternative would be to catch ENOENT from the /proc lookup and translate it to EBADF, but I want to avoid doing that in the interest of not touching/depending on /proc at all in these functions as long as the kernel correctly supports the operations. this is following the general principle of isolating hacks to code paths that are taken on broken systems, and keeping the code for correct systems completely hack-free.
* fix hangs in localtime for near-overflowing time_t values on 64-bit archsRich Felker2013-12-191-0/+6
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* fix dynamic linker entry point for microblazeRich Felker2013-12-141-3/+4
| | | | | | | | the ABI allows the callee to clobber stack slots that correspond to arguments passed in registers, so the caller must adjust the stack pointer to reserve space appropriately. prior to this fix, the argv array was possibly clobbered by dynamic linker code before passing control to the main program.
* optimize get_current_dir_name to reduce stack bloatRich Felker2013-12-131-3/+1
| | | | | | | | our getcwd already (as an extension) supports allocation of a buffer when the buffer argument is a null pointer, so there's no need to duplicate the allocation logic in this wrapper function. duplicating it is actually harmful in that it doubles the stack usage from PATH_MAX to 2*PATH_MAX.
* use 0 instead of NULL for null pointer constantsRich Felker2013-12-137-15/+8
| | | | and thereby remove otherwise-unnecessary inclusion of stddef.h
* include cleanups: remove unused headers and add feature test macrosSzabolcs Nagy2013-12-12157-207/+68
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* remove an unnecessary check in inet_ptonSzabolcs Nagy2013-12-121-2/+1
| | | | | at most 4 hexadecimal digits are processed in one field so the value cannot overflow. the netdb.h header was not used.
* math: define _GNU_SOURCE when implementing non-standard math functionsSzabolcs Nagy2013-12-126-0/+6
| | | | | this makes the prototypes in math.h are visible so they are checked agaist the function definitions
* add posix_close, accepted for inclusion in the next issue of POSIXRich Felker2013-12-062-0/+9
| | | | | this is purely a wrapper for close since Linux does not support EINTR semantics for the close syscall.
* remove dependency of version.h on .git/* to avoid errorsRich Felker2013-12-041-1/+1
| | | | | | | | | | the wildcard function in GNU make includes dangling symlinks; if any exist under the .git directory, they would get added as dependencies, causing make to exit with an error due to lacking a rule to build the missing file. as far as I can tell, git operations which should force version.h to be rebuilt must all touch the mtime of the top-level .git directory.
* move struct ucred under _GNU_SOURCE in sys/socket.h for clean posix namespaceSzabolcs Nagy2013-12-041-0/+2
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* fix SHUT_WR typo in sys/socket.h and duplicate definitions of SHUT_*Szabolcs Nagy2013-12-041-5/+1
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* fix res_mkquery and res_send prototypes in resolv.hSzabolcs Nagy2013-12-041-4/+2
| | | | | | | | | historically these functions appeared in BSD 4.3 without prototypes, then in the bind project prototypes were added to resolv.h, but those were incompatible with the definitions of the implementation. the bind resolv.h became the defacto api most systems use now, but the old internal definitions found their way into the linux manuals and thus into musl.
* remove duplicate definition of _PATH_LASTLOG in paths.hRich Felker2013-12-031-1/+0
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* fix mv usage in install.sh to avoid bogus interactive promptingRich Felker2013-12-031-1/+1
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* workaround clang deficiency affecting thread pointer access on powerpcRich Felker2013-12-021-1/+6
| | | | | based on patch by Richard Pennington, who initially reported the issue.
* implement FNM_LEADING_DIR extension flag in fnmatchRich Felker2013-12-021-2/+9
| | | | | | | | | | | | | | | | previously this flag was defined and accepted as a no-op, possibly breaking some software that uses it. given the choice to remove the definition and possibly break applications that were already working, or simply implement the feature, the latter turned out to be easy enough to make the decision easy. in the case where the FNM_PATHNAME flag is also set, this implementation is clean and essentially optimal. otherwise, it's an inefficient "brute force" implementation. at some point, when cleaning up and refactoring this code, I may add a more direct code path for handling FNM_LEADING_DIR in the non-FNM_PATHNAME case, but at this point my main interest is avoiding introducing new bugs in the code that implements the standard fnmatch features specified by POSIX.
* remove now-unnecessary features.h inclusion from fnmatch.hRich Felker2013-12-021-2/+0
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* expose FNM_* extensions in fnmatch.h without _GNU_SOURCERich Felker2013-12-021-3/+0
| | | | | at least a couple of these are used on BSD too, and the FNM_* namespace is reserved in fnmatch.h anyway.
* fix typos in INSTALL fileRich Felker2013-12-011-2/+2
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* add infrastructure to record and report the version of libc.soRich Felker2013-12-015-3/+39
| | | | | | | this is still experimental and subject to change. for git checkouts, an attempt is made to record the exact revision to aid in bug reports and debugging. no version information is recorded in the static libc.a or binaries it's linked into.
* fix fnmatch corner cases related to escapingRich Felker2013-12-011-4/+4
| | | | | | the FNM_PATHNAME logic for advancing by /-delimited components was incorrect when the / character was escaped (i.e. \/), and a final \ at the end of pattern was not handled correctly.
* fix the end of string matching in fnmatch with FNM_PATHNAMESzabolcs Nagy2013-12-011-2/+2
| | | | | | a '/' in the pattern could be incorrectly matched against the terminating null byte in the string causing arbitrarily long sequence of out-of-bounds access in fnmatch("/","",FNM_PATHNAME)
* support mix of IPv4 and v6 nameservers in resolv.confRich Felker2013-11-301-5/+31
| | | | | | | | | | | | | | | | | a v6 socket will only be used if there is at least one v6 nameserver address. if the kernel lacks v6 support, the code will fall back to using a v4 socket and requests to v6 servers will silently fail. when using a v6 socket, v4 addresses are converted to v4-mapped form and setsockopt is used to ensure that the v6 socket can accept both v4 and v6 traffic (this is on-by-default on Linux but the default is configurable in /proc and so it needs to be set explicitly on the socket level). this scheme avoids increasing resource usage during lookups and allows the existing network io loop to be used without modification. previously, nameservers whose address family did not match the address family of the first-listed nameserver were simply ignored. prior to recent __ipparse fixes, they were not ignored but erroneously parsed.
* increase TTY_NAME_MAX limit to 32Rich Felker2013-11-291-1/+1
| | | | | | | | the old value of 20 was reported by Laurent Bercot as being insufficient for a reasonable real-world usage case. actual problem was the internal buffer used by ttyname(), but the implementation of ttyname uses TTY_NAME_MAX, and for consistency it's best to increase both. the new value is aligned with glibc.
* reject invalid address families in getaddrinfoRich Felker2013-11-271-0/+3
| | | | | | | subsequent code assumes the address family requested is either unspecified or one of IPv4/IPv6, and could malfunction if this constraint is not met, so other address families should be explicitly rejected.
* adjust fallback INFINITY definition for FLT_EVAL_METHOD==2 caseRich Felker2013-11-261-1/+1
| | | | | | | | | | on archs with excess precision, the floating point constant 1e40f may be evaluated such that it does not actually produce an infinity. 1e5000f is sufficiently large to produce an infinity for all supported floating point formats. note that this definition of INFINITY is only used for old or non-GNUC compilers anyway; despite being a portable, conforming definition, it leads to erroneous warnings on many compilers and thus using the builtin is preferred.
* fix off-by-one length failure in strftime/wcsftime and improve error behaviorRich Felker2013-11-262-12/+16
| | | | | | | | | | | | | | | | | these functions were spuriously failing in the case where the buffer size was exactly the number of bytes/characters to be written, including null termination. since these functions do not have defined error conditions other than buffer size, a reasonable application may fail to check the return value when the format string and buffer size are known to be valid; such an application could then attempt to use a non-terminated buffer. in addition to fixing the bug, I have changed the error handling behavior so that these functions always null-terminate the output except in the case where the buffer size is zero, and so that they always write as many characters as possible before failing, rather than dropping whole fields that do not fit. this actually simplifies the logic somewhat anyway.
* remove duplicate includes from dynlink.c, strfmon.c and getaddrinfo.cSzabolcs Nagy2013-11-253-7/+0
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* restore type of NULL to void * except when used in C++ programsRich Felker2013-11-248-0/+33
| | | | | | | | | | | | | | unfortunately this eliminates the ability of the compiler to diagnose some dangerous/incorrect usage, but POSIX requires (as an extension to the C language, i.e. CX shaded) that NULL have type void *. plain C allows it to be defined as any null pointer constant. the definition 0L is preserved for C++ rather than reverting to plain 0 to avoid dangerous behavior in non-conforming programs which use NULL as a variadic sentinel. (it's impossible to use (void *)0 for C++ since C++ lacks the proper implicit pointer conversions, and other popular alternatives like the GCC __null extension seem non-conforming to the standard's requirements.)
* shadow: Implement fgetspentMichael Forney2013-11-241-1/+10
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* shadow: Move spent parsing to internal functionMichael Forney2013-11-242-31/+40
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* Fix dn_comp prototype and add stubMichael Forney2013-11-242-1/+10
| | | | This function is used by ping6 from iputils.
* shadow: Implement putspentMichael Forney2013-11-242-5/+13
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* math: clean up __rem_pio2Szabolcs Nagy2013-11-243-71/+53
| | | | | | | | | | | - remove the HAVE_EFFICIENT_IRINT case: fn is an exact integer, so it can be converted to int32_t a bit more efficiently than with a cast (the rounding mode change can be avoided), but musl does not support this case on any arch. - __rem_pio2: use double_t where possible - __rem_pio2f: use less assignments to avoid stores on i386 - use unsigned int bit manipulation (and union instead of macros) - use hexfloat literals instead of named constants
* use 0 instead of NULL in headers where NULL is not definedSzabolcs Nagy2013-11-242-3/+3
| | | | some macros in sys/mtio.h and syslog.h used NULL without defining it
* add O_TMPFILE flag, new in linux 3.11Szabolcs Nagy2013-11-236-0/+6
| | | | | | definition in linux: #define O_TMPFILE (__O_TMPFILE | O_DIRECTORY) where __O_TMPFILE and O_DIRECTORY are arch specific
* add TCP_NOTSENT_LOWAT tcp socket option, new in linux v3.12Szabolcs Nagy2013-11-231-0/+1
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* add linux tcp state enumsTimo Teräs2013-11-231-0/+12
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* add multicast structures from RFC 3678 to netinet/in.hTimo Teräs2013-11-231-1/+42
| | | | | and use _GNU_SOURCE || _BSD_SOURCE guards for all of the RFC 3678 namespace polluting things like glibc/uclibc does.
* Fix dn_expand pointer followingMichael Forney2013-11-231-1/+1
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* putgrent: Add missing newlineMichael Forney2013-11-231-0/+1
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* putgrent: Stop writing output on first failureMichael Forney2013-11-231-2/+3
| | | | | This way, if an fprintf fails, we get an incomplete group entry rather than a corrupted one.
* strcmp: Remove unnecessary check for *rMichael Forney2013-11-231-1/+1
| | | | If *l == *r && *l, then by transitivity, *r.
* timeradd/timersub: cast result to void to get rid of warningsrofl0r2013-11-231-2/+2
| | | | | | | previously: timersub(&now, t, &diff); warning: value computed is not used [-Wunused-value]
* fix and refactor child reaping logic in wordexpRich Felker2013-11-221-6/+16
| | | | | | loop condition was incorrect and confusing and caused an infinite loop when (broken) applications reaped the pid from a signal handler or another thread before wordexp's call to waitpid could do so.
* fix fd leak and case where fd 1 is already closed in wordexpRich Felker2013-11-221-4/+4
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* fix resource exhaustion and zero-word cases in wordexpRich Felker2013-11-221-8/+18
| | | | | | | | | | | | | when WRDE_NOSPACE is returned, the we_wordv and we_wordc members must be valid, because the interface contract allows them to return partial results. in the case of zero results (due either to resource exhaustion or a zero-word input) the we_wordv array still should contain a terminating null pointer and the initial we_offs null pointers. this is impossible on resource exhaustion, so a correct application must presumably check for a null pointer in we_wordv; POSIX however seems to ignore the issue. the previous code may have crashed under this situation.
* improve robustness of wordexp and fix handling of 0-word caseRich Felker2013-11-221-11/+16
| | | | | | | | | | | | | | | | | | | | avoid using exit status to determine if a shell error occurred, since broken programs may install SIGCHLD handlers which reap all zombies, including ones that don't belong to them. using clone and __WCLONE does not seem to work for avoiding this problem since exec resets the exit signal to SIGCHLD. instead, the new code uses a dummy word at the beginning of the shell's output, which is ignored, to determine whether the command was executed successfully. this also fixes a corner case where a word string containing zero words was interpreted as a single zero-length word rather than no words at all. POSIX does not seem to require this case to be supported anyway, though. in addition, the new code uses the correct retry idiom for waitpid to ensure that spurious STOP/CONT signals in the child and/or EINTR in the parent do not prevent successful wait for the child, and blocks signals in the child.
* add legacy getloadavg apiSzabolcs Nagy2013-11-212-0/+19
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