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2011-06-07mq send/recv functions are cancellation pointsRich Felker-2/+2
2011-06-07implement mq_notifyRich Felker-2/+65
2011-06-07add support for POSIX message queues, except mq_notifyRich Felker-0/+99
2011-06-06use volatile pointers for intentional-crash code.Rich Felker-3/+3
2011-06-06fix handling of d_name in struct direntRich Felker-7/+5
basically there are 3 choices for how to implement this variable-size string member: 1. C99 flexible array member: breaks using dirent.h with pre-C99 compiler. 2. old way: length-1 string: generates array bounds warnings in caller. 3. new way: length-NAME_MAX string. no problems, simplifies all code. of course the usable part in the pointer returned by readdir might be shorter than NAME_MAX+1 bytes, but that is allowed by the standard and doesn't hurt anything.
2011-06-05safety fix for glob's vla usage: disallow patterns longer than PATH_MAXRich Felker-0/+2
this actually inadvertently disallows some valid patterns with redundant / or * characters, but it's better than allowing unbounded vla allocation. eventually i'll write code to move the pattern to the stack and eliminate redundancy to ensure that it fits in PATH_MAX at the beginning of glob. this would also allow it to be modified in place for passing to fnmatch rather than copied at each level of recursion.
2011-06-05eliminate (harmless in this case) vla usage in fnmatch.cRich Felker-1/+1
2011-05-30implement pthread_[sg]etconcurrency.Rich Felker-0/+15
there is a resource limit of 0 bits to store the concurrency level requested. thus any positive level exceeds a resource limit, resulting in EAGAIN. :-)
2011-05-30implement uselocale function (minimal)Rich Felker-0/+12
2011-05-29add useless, obsolescent function ulimitRich Felker-0/+19
2011-05-29fix backwards posix_spawn file action orderRich Felker-6/+10
2011-05-28add accidentally-omitted file needed for posix_spawn file actionsRich Felker-0/+10
2011-05-28add file actions support to posix_spawnRich Felker-2/+85
2011-05-28posix_spawn: honor POSIX_SPAWN_SETSIGDEF flagRich Felker-1/+3
2011-05-28initial implementation of posix_spawnRich Felker-0/+151
file actions are not yet implemented, but everything else should be mostly complete and roughly correct.
2011-05-26modernize coding style in sjlj asmRich Felker-35/+35
2011-05-22fix strncat and wcsncat (double null termination)Rich Felker-3/+3
also modify wcsncpy to use the same loop logic
2011-05-22fix wcsncpy writing past end of bufferRich Felker-1/+1
2011-05-22fix brk/sbrk behavior to match the real legacy functionsRich Felker-2/+4
2011-05-11fix the last known rounding bug in floating point printingRich Felker-3/+4
the observed symptom was that the code was incorrectly rounding up 1.0625 to 1.063 despite the rounding mode being round-to-nearest with ties broken by rounding to even last place. however, the code was just not right in many respects, and i'm surprised it worked as well as it did. this time i tested the values that end up in the variables round, small, and the expression round+small, and all look good.
2011-05-08eventfd syscall wrapper and read/write wrappersRich Felker-0/+21
2011-05-07optimize out useless default-attribute object in pthread_createRich Felker-7/+7
2011-05-07optimize compound-literal sigset_t's not to contain useless hurd bitsRich Felker-5/+7
2011-05-07overhaul implementation-internal signal protectionsRich Felker-49/+31
the new approach relies on the fact that the only ways to create sigset_t objects without invoking UB are to use the sig*set() functions, or from the masks returned by sigprocmask, sigaction, etc. or in the ucontext_t argument to a signal handler. thus, as long as sigfillset and sigaddset avoid adding the "protected" signals, there is no way the application will ever obtain a sigset_t including these bits, and thus no need to add the overhead of checking/clearing them when sigprocmask or sigaction is called. note that the old code actually *failed* to remove the bits from sa_mask when sigaction was called. the new implementations are also significantly smaller, simpler, and faster due to ignoring the useless "GNU HURD signals" 65-1024, which are not used and, if there's any sanity in the world, never will be used.
2011-05-06reduce some ridiculously large spin countsRich Felker-2/+2
these should be tweaked according to testing. offhand i know 1000 is too low and 5000 is likely to be sufficiently high. consider trying to add futexes to file locking, too...
2011-05-06remove debug code that was missed in barrier commitRich Felker-1/+0
2011-05-06completely new barrier implementation, addressing major correctness issuesRich Felker-20/+48
the previous implementation had at least 2 problems: 1. the case where additional threads reached the barrier before the first wave was finished leaving the barrier was untested and seemed not to be working. 2. threads leaving the barrier continued to access memory within the barrier object after other threads had successfully returned from pthread_barrier_wait. this could lead to memory corruption or crashes if the barrier object had automatic storage in one of the waiting threads and went out of scope before all threads finished returning, or if one thread unmapped the memory in which the barrier object lived. the new implementation avoids both problems by making the barrier state essentially local to the first thread which enters the barrier wait, and forces that thread to be the last to return.
2011-05-02fix fclose return status logic, againRich Felker-1/+2
the previous fix was incorrect, as it would prevent f->close(f) from being called if fflush(f) failed. i believe this was the original motivation for using | rather than ||. so now let's just use a second statement to constrain the order of function calls, and to back to using |.
2011-05-01fix undefined call order in fclose, possible lost output depending on compilerRich Felker-1/+1
pcc turned up this bug by calling f->close(f) before fflush(f), resulting in lost output and error on flush.
2011-05-01workaround for preprocessor bug in pccRich Felker-7/+7
with this patch, musl compiles and mostly works with pcc 1.0.0. a few tests are still failing and i'm uncertain whether they are due to portability problems in musl, or bugs in pcc, but i suspect the latter.
2011-05-01minor optimization in puts: use inline putc_unlocked macro for newlineRich Felker-1/+1
2011-04-29avoid crashing when nel==0 is passed to qsortRich Felker-2/+6
2011-04-27correct variadic prototypes for execl* familyRich Felker-15/+18
the old versions worked, but conflicted with programs which declared their own prototypes and generated warnings with some versions of gcc.
2011-04-27replace heap sort with smoothsort implementation by Valentin OchsRich Felker-32/+193
Smoothsort is an adaptive variant of heapsort. This version was written by Valentin Ochs (apo) specifically for inclusion in musl. I worked with him to get it working in O(1) memory usage even with giant array element widths, and to optimize it heavily for size and speed. It's still roughly 4 times as large as the old heap sort implementation, but roughly 20 times faster given an almost-sorted array of 1M elements (20 being the base-2 log of 1M), i.e. it really does reduce O(n log n) to O(n) in the mostly-sorted case. It's still somewhat slower than glibc's Introsort for random input, but now considerably faster than glibc when the input is already sorted, or mostly sorted.
2011-04-26function signature fix: add const qualifier to mempcpy src argRich Felker-1/+1
2011-04-25fix bug in ipv6 parsing that prevented parsing a lone "::"Rich Felker-4/+1
2011-04-25ipv6 parsing code (formerly dummied-out)Rich Felker-8/+62
2011-04-25fix 2 eof-related bugs in scanfRich Felker-3/+4
1. failed match of literal chars from the format string would always return matching failure rather than input failure at eof, leading to infinite loops in some programs. 2. unread of eof would wrongly adjust the character counts reported by %n, yielding an off-by-one error.
2011-04-22fix initial stack alignment in new threads on x86_64Rich Felker-1/+1
2011-04-21omit errno update path for syscalls that cannot failRich Felker-7/+7
2011-04-21fix bogus return values for inet_ptonRich Felker-2/+2
2011-04-20fix minor bugs due to incorrect threaded-predicate semanticsRich Felker-6/+6
some functions that should have been testing whether pthread_self() had been called and initialized the thread pointer were instead testing whether pthread_create() had been called and actually made the program "threaded". while it's unlikely any mismatch would occur in real-world problems, this could have introduced subtle bugs. now, we store the address of the main thread's thread descriptor in the libc structure and use its presence as a flag that the thread register is initialized. note that after fork, the calling thread (not necessarily the original main thread) is the new main thread.
2011-04-20workaround bug in linux dup2Rich Felker-1/+4
the linux documentation for dup2 says it can fail with EBUSY due to a race condition with open and dup in the kernel. shield applications (and the rest of libc) from this nonsense by looping until it succeeds
2011-04-20properly create new session/controlling terminal in forkptyRich Felker-1/+4
2011-04-20implement (nonstandard) forkptyRich Felker-0/+22
2011-04-20disallow blank strings as service or host nameRich Felker-0/+3
2011-04-20fix bugs in ipv4 parsingRich Felker-1/+2
2011-04-20fix initgroups (uninitialized count passed to getgrouplist)Rich Felker-1/+1
2011-04-20shadow password fixes: empty fields should read as -1 not 0Rich Felker-7/+13
2011-04-20namespace fixes for sys/mman.hRich Felker-0/+1