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2011-04-17fix some minor issues in cancellation handling patchRich Felker3-11/+19
signals were wrongly left masked, and cancellability state was not switched to disabled, during the execution of cleanup handlers.
2011-04-17overhaul pthread cancellationRich Felker50-227/+247
this patch improves the correctness, simplicity, and size of cancellation-related code. modulo any small errors, it should now be completely conformant, safe, and resource-leak free. the notion of entering and exiting cancellation-point context has been completely eliminated and replaced with alternative syscall assembly code for cancellable syscalls. the assembly is responsible for setting up execution context information (stack pointer and address of the syscall instruction) which the cancellation signal handler can use to determine whether the interrupted code was in a cancellable state. these changes eliminate race conditions in the previous generation of cancellation handling code (whereby a cancellation request received just prior to the syscall would not be processed, leaving the syscall to block, potentially indefinitely), and remedy an issue where non-cancellable syscalls made from signal handlers became cancellable if the signal handler interrupted a cancellation point. x86_64 asm is untested and may need a second try to get it right.
2011-04-15remove stupid debug code in wordexpRich Felker1-1/+0
2011-04-15implement wordexp. first try, may be buggy. intended to be safe.Rich Felker1-0/+128
2011-04-15avoid setting errno when checking for ttyRich Felker2-2/+2
setting errno here is completely valid, but some programs, notably busybox printf, assume that errno will not be set during output and treat this as an error condition. in any case, skipping it slightly reduces code size and saves time.
2011-04-14document some changes in the upcoming releaseRich Felker1-1/+18
2011-04-14fix O_SYNC definition, cleanup fcntl.hRich Felker3-22/+18
2011-04-14fix FAPPEND typo on x86_64 (previously only fixed on i386)Rich Felker1-1/+1
2011-04-14fcntl.h: move macros that do not vary between archs out of bitsRich Felker3-48/+24
2011-04-14fix broken fcntl locks on x86_64Rich Felker1-3/+3
2011-04-14make tmpfile slightly more efficient (use unlink syscall instead of remove)Rich Felker1-1/+1
2011-04-14fix typo in legacy FAPPEND definitionRich Felker1-1/+1
2011-04-14add useless type fd_mask. it's in the reserved namespace.Rich Felker1-0/+2
2011-04-14change sem_trywait algorithm so it never has to call __wakeRich Felker1-3/+2
2011-04-14cheap trick to further optimize locking normal mutexesRich Felker2-2/+2
2011-04-14use a separate signal from SIGCANCEL for SIGEV_THREAD timersRich Felker6-11/+29
otherwise we cannot support an application's desire to use asynchronous cancellation within the callback function. this change also slightly debloats pthread_create.c.
2011-04-13simplify cancellation point handlingRich Felker2-16/+5
we take advantage of the fact that unless self->cancelpt is 1, cancellation cannot happen. so just increment it by 2 to temporarily block cancellation. this drops pthread_create.o well under 1k.
2011-04-13simplify syslog, add vsyslog interface (nonstandard)Rich Felker1-31/+36
with datagram sockets, depending on fprintf not to flush the output early was very fragile; the new version simply uses a small fixed-size buffer. it could be updated to dynamic-allocate large buffers if needed, but i can't envision any admin being happy about finding 64kb-long lines in their syslog...
2011-04-13remove useless SIGPIPE protection from syslogRich Felker1-9/+0
per the standard, SIGPIPE is not generated for SOCK_DGRAM.
2011-04-13fix syslog (corrected SIGPIPE blocking, and using dgram instead of stream)Rich Felker1-10/+8
it actually appears the hacks to block SIGPIPE are probably not necessary, and potentially harmful. if i can confirm this, i'll remove them.
2011-04-13numerous fixes to sysv ipcRich Felker12-66/+96
some of these definitions were just plain wrong, others based on outdated ancient "non-64" versions of the kernel interface. as much as possible has now been moved out of bits/* these changes break abi (the old abi for these functions was wrong), but since they were not working anyway it can hardly matter.
2011-04-13add syslog.h cruft for syslogd to use...Rich Felker1-0/+45
2011-04-13add profile for getmntent_rRich Felker1-0/+1
2011-04-13add syscall wrapper for flockRich Felker1-0/+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 Felker1-1/+1
2011-04-13fix typos on RLIM_NLIMITS, remove _GNU_SOURCE test for itRich Felker1-3/+1
RLIM_* is in the reserved namespace for this header
2011-04-13fix and cleanup suseconds_t/timeval stuff (broken on 64-bit)Rich Felker3-10/+2
trash in the upper 32 bits was making the kernel sleep forever in select on 64-bit systems.
2011-04-13implement getgrouplist (for initgroups), formerly dummied-outv0.7.8Rich Felker1-4/+16
2011-04-13fix prototypes/signature for setgroups, etc.Rich Felker3-2/+8
2011-04-13fix incorrect GNU sighandler_t typedefRich Felker1-1/+1
2011-04-13implement memrchr (nonstandard) and optimize strrchr in terms of itRich Felker3-4/+16
2011-04-13add ptsname_r (nonstandard) and split ptsname (standard) to separate fileRich Felker3-11/+17
this eliminates the ugly static buffer in programs that use ptsname_r.
2011-04-12speed up threaded forkRich Felker1-2/+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.
2011-04-12more changes for upcoming 0.7.8Rich Felker1-1/+12
2011-04-12optimize ntohl etc. in terms of bswap functionsRich Felker4-20/+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 Felker3-16/+25
2011-04-12fix broken bswap_32Rich Felker1-1/+1
2011-04-12utmpx.h is no longer under standards, so expose ut_exit structureRich Felker1-3/+3
2011-04-12add some traditional aliases to stat.hRich Felker1-0/+6
2011-04-12fix printf("%.9g", 1.1) and similar not dropping trailing zerosRich Felker1-1/+3
2011-04-12add missing rlimit macrosRich Felker1-0/+8
2011-04-11more types cleanupRich Felker3-18/+3
the basic idea is that the only things in alltypes.h should be types that either vary from system to system (in practice, not just in theoretical la-la land - this is the implementation so we choose what constraints we want to impose on ports) or which are needed by multiple system headers.
2011-04-11cleanup types stuff in headers, fix missing u_int*_t in sys/types.hRich Felker4-29/+19
2011-04-11fix errno handling in scandir:Rich Felker1-2/+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 Felker1-1/+1
2011-04-11remove ugly warning-suppression hack from crypt - this invokes UB!Rich Felker1-1/+1
2011-04-11update README since we now DO have a mailing listRich Felker1-4/+4
2011-04-10add some ugly legacy type names in sys/types.h (u_char etc.)Rich Felker1-0/+8
2011-04-10add legacy BSD-style timer*() macros in sys/time.hRich Felker1-0/+10
2011-04-10add missing UTIME_* macros in sys/stat.hRich Felker1-0/+3