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2011-04-13add syscall wrapper for flockRich Felker-0/+7
it should be noted that flock does not mix well with standard fcntl locking, but nonetheless some applications will attempt to use flock instead of fcntl if both exist. options to configure or small patches may be needed. debian maintainers have plenty of experience with this unfortunate situation...
2011-04-13fix bug whereby getopt_long allowed mismatch in last char of option nameRich Felker-1/+1
2011-04-13implement getgrouplist (for initgroups), formerly dummied-outv0.7.8Rich Felker-4/+16
2011-04-13fix prototypes/signature for setgroups, etc.Rich Felker-1/+1
2011-04-13implement memrchr (nonstandard) and optimize strrchr in terms of itRich Felker-4/+15
2011-04-13add ptsname_r (nonstandard) and split ptsname (standard) to separate fileRich Felker-11/+16
this eliminates the ugly static buffer in programs that use ptsname_r.
2011-04-12speed up threaded forkRich Felker-2/+1
after fork, we have a new process and the pid is equal to the tid of the new main thread. there is no need to make two separate syscalls to obtain the same number.
2011-04-12optimize ntohl etc. in terms of bswap functionsRich Felker-20/+12
we can do this without violating the namespace now that they are macros/inline functions rather than extern functions. the motivation is that gcc was generating giant, slow, horrible code for the old functions, and now generates a single byte-swapping instruction.
2011-04-12move bswap functions to static inline in byteswap.hRich Felker-16/+0
2011-04-12fix broken bswap_32Rich Felker-1/+1
2011-04-12fix printf("%.9g", 1.1) and similar not dropping trailing zerosRich Felker-1/+3
2011-04-11fix errno handling in scandir:Rich Felker-2/+1
1. saved errno was not being restored, illegally clearing errno to 0. 2. no need to backup and save errno around free; it will not touch except perhaps when the program has already invoked UB...
2011-04-11fix fputwc return valueRich Felker-1/+1
2011-04-11remove ugly warning-suppression hack from crypt - this invokes UB!Rich Felker-1/+1
2011-04-09run pthread tsd destructors when a timer thread pretends to exitRich Felker-0/+6
2011-04-09greatly improve SIGEV_THREAD timersRich Felker-15/+21
calling pthread_exit from, or pthread_cancel on, the timer callback thread will no longer destroy the timer.
2011-04-09work around a nasty bug in linux readv syscallRich Felker-3/+4
according to posix, readv "shall be equivalent to read(), except..." that it places the data into the buffers specified by the iov array. however on linux, when reading from a terminal, each iov element behaves almost like a separate read. this means that if the first iov exactly satisfied the request (e.g. a length-one read of '\n') and the second iov is nonzero length, the syscall will block again after getting the blank line from the terminal until another line is read. simply put, entering a single blank line becomes impossible. the solution, fortunately, is simple. whenever the buffer size is nonzero, reduce the length of the requested read by one byte and let the last byte go through the buffer. this way, readv will already be in the second (and last) iov, and won't re-block on the second iov.
2011-04-08better fix sysconf pthread stack minRich Felker-1/+1
2011-04-08consistency with pthread stack min in limits.hRich Felker-1/+1
2011-04-08fix broken sigsetjmp on x86_64Rich Felker-7/+9
2011-04-08workaround broken msghdr struct on 64bit linuxRich Felker-0/+21
POSIX clearly specifies the type of msg_iovlen and msg_controllen, and Linux ignores it and makes them both size_t instead. to work around this we add padding (instead of just using the wrong types like glibc does), but we also need to patch-up the struct before passing it to the kernel in case the caller did not zero-fill it. if i could trust the kernel to just ignore the upper 32 bits, this would not be necessary, but i don't think it will ignore them...
2011-04-08fix ipv6 address printing: 2001 appeared as 201, etc.Rich Felker-3/+5
2011-04-08fix broken dns response parsing code that made most ipv6 lookups failRich Felker-4/+6
2011-04-08return the requested string as the "canonical name" for numeric addressesRich Felker-0/+1
previously NULL was returned in ai_canonname, resulting in crashes in some callers. this behavior was incorrect. note however that the new behavior differs from glibc, which performs reverse dns lookups. POSIX is very clear that a reverse DNS lookup must not be performed for numeric addresses.
2011-04-07fix uninitialized variables in dns lookup codeRich Felker-2/+2
2011-04-07fix bug in TRE found by clang (typo && instead of &)Rich Felker-1/+1
2011-04-07fix misplaced *'s in string functions (harmless)Rich Felker-3/+3
2011-04-07fix broken unsigned comparison in wcstoumaxRich Felker-1/+1
2011-04-07fix breakage due to converting a return type to size_t in iconv...Rich Felker-1/+1
2011-04-06fixed crash in new rsyscall (failure to set sa_flags for signal handler)Rich Felker-0/+2
2011-04-06consistency: change all remaining syscalls to use SYS_ rather than __NR_ prefixRich Felker-40/+40
2011-04-06move rsyscall out of pthread_create moduleRich Felker-109/+133
this is something of a tradeoff, as now set*id() functions, rather than pthread_create, are what pull in the code overhead for dealing with linux's refusal to implement proper POSIX thread-vs-process semantics. my motivations are: 1. it's cleaner this way, especially cleaner to optimize out the rsyscall locking overhead from pthread_create when it's not needed. 2. it's expected that only a tiny number of core system programs will ever use set*id() functions, whereas many programs may want to use threads, and making thread overhead tiny is an incentive for "light" programs to try threads.
2011-04-06pthread exit stuff: don't bother setting errno when we won't check it.Rich Felker-2/+2
2011-04-06fix rsyscall handler: must not clobber errno from signal contextRich Felker-2/+4
2011-04-06add startup abi functions, dummy for now. eventually needed for c++ support.Rich Felker-0/+10
2011-04-06add _res (__res_state()) dummyRich Felker-0/+9
2011-04-06fix prototype for strsepRich Felker-0/+1
2011-04-06fix completely bogus loop condition in getmntent_rRich Felker-1/+1
somehow this worked on my simple fstab, but horribly broke in general, leading to use of uninitialized offset array and crashes.
2011-04-06major semaphore improvements (performance and correctness)Rich Felker-21/+37
1. make sem_[timed]wait interruptible by signals, per POSIX 2. keep a waiter count in order to avoid unnecessary futex wake syscalls
2011-04-06fix signal-based timers with null sigevent argumentRich Felker-28/+19
since timer_create is no longer allocating a structure for the timer_t and simply using the kernel timer id, it was impossible to specify the timer_t as the argument to the signal handler. the solution is to pass the null sigevent pointer on to the kernel, rather than filling it in userspace, so that the kernel does the right thing. however, that precludes the clever timerid-versus-threadid encoding we were doing. instead, just assume timerids are below 1M and thread pointers are above 1M. (in perspective: timerids are sequentially allocated and seem limited to 32k, and thread pointers are at roughly 3G.)
2011-04-06fix incorrect (and conflicting on LP64 archs) types for sysv ipc msgq functionsRich Felker-1/+1
2011-04-05fix (hopefully) statvfs breakage on x86_64 that resulted from fixing i386...Rich Felker-2/+10
2011-04-05new framework to inhibit thread cancellation when neededRich Felker-5/+17
with these small changes, libc functions which need to call functions which are cancellation points, but which themselves must not be cancellation points, can use the CANCELPT_INHIBIT and CANCELPT_RESUME macros to temporarily inhibit all cancellation.
2011-04-05add sysv ipc message queues (completely untested)Rich Felker-0/+58
2011-04-05implement the adjtime and adjtimex functions (nonstandard)Rich Felker-0/+34
2011-04-05add getmntent_r interface (all of mntent is nonstandard anyway)Rich Felker-12/+17
2011-04-05implement if_indextoname and if_nametoindex functionsRich Felker-0/+36
2011-04-05add (nonstandard) cfmakeraw functionRich Felker-0/+12
2011-04-05add pivot_root syscall wrapperRich Felker-0/+6
2011-04-05add more legacy functions: setlinebuf and setbufferRich Felker-1/+15