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* 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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* fix fd leak (missing close-on-exec) in getifaddrsRich Felker2013-11-201-1/+1
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* math: add (obsolete) bsd drem and finite functionsSzabolcs Nagy2013-11-215-0/+26
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* math: lgamma cleanup (simpler sin(pi*x) for the negative case)Szabolcs Nagy2013-11-214-202/+110
| | | | | | | | | * simplify sin_pi(x) (don't care about inexact here, the result is inexact anyway, and x is not so small to underflow) * in lgammal add the previously removed special case for x==1 and x==2 (to fix the sign of zero in downward rounding mode) * only define lgammal on supported long double platforms * change tgamma so the generated code is a bit smaller
* fix the nominal type of LDBL_* limits on archs with ld64Rich Felker2013-11-204-16/+16
| | | | | | | | | | | previously these macros wrongly had type double rather than long double. I see no way an application could detect the error in C99, but C11's _Generic can trivially detect it. at the same time, even though these archs do not have excess precision, the number of decimal places used to represent these constants has been increased to 21 to be consistent with the decimal representations used for the DBL_* macros.
* write floating point limit constants to 21 significant decimal placesRich Felker2013-11-202-10/+10
| | | | | | | | | | this is enough to produce the correct value even if the constant is interpreted as 80-bit extended precision, which matters on archs with excess precision (FLT_EVAL_METHOD==2) under at least some interpretations of the C standard. the shorter representations, while correct if converted to the nominal precision at translation time, could produce an incorrect value at extended precision, yielding results such as (double)DBL_MAX != DBL_MAX.
* iswspace: fix handling of 0rofl0r2013-11-111-2/+1
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* fix harmless inconsistency in semtimedopRich Felker2013-11-091-1/+1
| | | | | | | this should not matter since the reality is that either all the sysv sem syscalls are individual syscalls, or all of them are multiplexed on the SYS_ipc syscall (depending on arch). but best to be consistent anyway.
* implement semtimedopRich Felker2013-11-092-0/+14
| | | | this is a Linux-specific extension to the sysv semaphore api.
* adjust sys/wait.h not to produde errors in strict ISO C feature profileRich Felker2013-11-091-3/+7
| | | | | | | | | | | | siginfo_t is not available from signal.h when the strict ISO C feature profile (e.g. passing -std=c99 to gcc without defining any other feature test macros) is used, but the type is needed to declare waitid. using sys/wait.h (or any POSIX headers) in strict ISO C mode is an application bug, but in the interest of compatibility, it's best to avoid producing gratuitous errors. the simplest fix I could find is suppressing the declaration of waitid (and also signal.h inclusion, since it's not needed for anything else) in this case, while still exposing everything else in sys/wait.h
* remove O_NOFOLLOW from __map_file used for time zone file loadingRich Felker2013-11-081-1/+1
| | | | | | | | | | | | | it's not clear why I originally wrote O_NOFOLLOW into this; I suspect the reason was with an aim of making the function more general for mapping partially or fully untrusted files provided by the user. however, the timezone code already precludes use of absolute or relative pathnames in suid/sgid programs, and disallows .. in pathnames which are relative to one of the system timezone locations, so there is no threat of opening a symlink which is not trusted by appropriate user. since some users may wish to put symbolic links in the zoneinfo directories to alias timezones, it seems preferable to allow this.
* fix handling of overly-long TZ environment variable valuesRich Felker2013-11-081-1/+1
| | | | | | the rest of the code is not prepared to handle an empty TZ string, so falling back to __gmt ("GMT"), just as if TZ had been blank or unset, is the preferable action.
* timezone parser: fix iteration over search dir pathsrofl0r2013-11-041-1/+1
| | | | try+l points to \0, so only one iteration was ever tried.
* timezone parser: fix offset to transition table in 64bit code pathrofl0r2013-11-041-1/+1
| | | | | | we need to skip to the second TZif header, which starts at skip+44, and then skip another header (20 bytes) plus the following 6 32bit values.
* fix timezone parser code crashing on 64bit sysrofl0r2013-11-041-1/+1
| | | | | | | if sizeof(time_t) == 8, this code path was missing the correct offset into the zoneinfo file, using the header magic to do offset calculations. the 6 32bit fields to be read start at offset 20.
* fix regression in inet_aton due to misinterpretation of __ipparse returnRich Felker2013-11-022-3/+3
| | | | | | | inet_aton returns a boolean success value, whereas __ipparse returns 0 on success and -1 on failure. also change the conditional in inet_addr to be consistent with other uses of __ipparse where only negative values are treated as failure.
* simplify faccessat AT_EACCESS path and eliminate resource dependenceRich Felker2013-11-011-14/+21
| | | | | | | now that we're waiting for the exit status of the child process, the result can be conveyed in the exit status rather than via a pipe. since the error value might not fit in 7 bits, a table is used to translate possible meaningful error values to small integers.
* fix faccessat AT_EACCESS path not to leave zombie processesRich Felker2013-11-011-2/+6
| | | | | | I mistakenly assumed that clone without a signal produced processes that would not become zombies; however, waitpid with __WCLONE is required to release their pids.
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