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Rich Felker [Thu, 14 Apr 2011 23:14:42 +0000 (19:14 -0400)]
fix typo in legacy FAPPEND definition
Rich Felker [Thu, 14 Apr 2011 20:23:31 +0000 (16:23 -0400)]
add useless type fd_mask. it's in the reserved namespace.
Rich Felker [Thu, 14 Apr 2011 19:10:50 +0000 (15:10 -0400)]
change sem_trywait algorithm so it never has to call __wake
Rich Felker [Thu, 14 Apr 2011 18:39:57 +0000 (14:39 -0400)]
cheap trick to further optimize locking normal mutexes
Rich Felker [Thu, 14 Apr 2011 16:51:00 +0000 (12:51 -0400)]
use a separate signal from SIGCANCEL for SIGEV_THREAD timers
otherwise we cannot support an application's desire to use
asynchronous cancellation within the callback function. this change
also slightly debloats pthread_create.c.
Rich Felker [Thu, 14 Apr 2011 00:47:01 +0000 (20:47 -0400)]
simplify cancellation point handling
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.
Rich Felker [Wed, 13 Apr 2011 22:32:33 +0000 (18:32 -0400)]
simplify syslog, add vsyslog interface (nonstandard)
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...
Rich Felker [Wed, 13 Apr 2011 21:51:45 +0000 (17:51 -0400)]
remove useless SIGPIPE protection from syslog
per the standard, SIGPIPE is not generated for SOCK_DGRAM.
Rich Felker [Wed, 13 Apr 2011 21:24:25 +0000 (17:24 -0400)]
fix syslog (corrected SIGPIPE blocking, and using dgram instead of stream)
it actually appears the hacks to block SIGPIPE are probably not
necessary, and potentially harmful. if i can confirm this, i'll remove
them.
Rich Felker [Wed, 13 Apr 2011 20:45:43 +0000 (16:45 -0400)]
numerous fixes to sysv ipc
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outdated ancient "non-64" versions of the kernel interface.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.
Rich Felker [Wed, 13 Apr 2011 20:13:49 +0000 (16:13 -0400)]
add syslog.h cruft for syslogd to use...
Rich Felker [Wed, 13 Apr 2011 19:24:26 +0000 (15:24 -0400)]
add profile for getmntent_r
Rich Felker [Wed, 13 Apr 2011 18:55:26 +0000 (14:55 -0400)]
add syscall wrapper for flock
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...
Rich Felker [Wed, 13 Apr 2011 18:52:23 +0000 (14:52 -0400)]
fix bug whereby getopt_long allowed mismatch in last char of option name
Rich Felker [Wed, 13 Apr 2011 17:22:19 +0000 (13:22 -0400)]
fix typos on RLIM_NLIMITS, remove _GNU_SOURCE test for it
RLIM_* is in the reserved namespace for this header
Rich Felker [Wed, 13 Apr 2011 17:16:49 +0000 (13:16 -0400)]
fix and cleanup suseconds_t/timeval stuff (broken on 64-bit)
trash in the upper 32 bits was making the kernel sleep forever in
select on 64-bit systems.
Rich Felker [Wed, 13 Apr 2011 13:39:47 +0000 (09:39 -0400)]
implement getgrouplist (for initgroups), formerly dummied-out
Rich Felker [Wed, 13 Apr 2011 13:03:22 +0000 (09:03 -0400)]
fix prototypes/signature for setgroups, etc.
Rich Felker [Wed, 13 Apr 2011 12:45:28 +0000 (08:45 -0400)]
fix incorrect GNU sighandler_t typedef
Rich Felker [Wed, 13 Apr 2011 12:36:29 +0000 (08:36 -0400)]
implement memrchr (nonstandard) and optimize strrchr in terms of it
Rich Felker [Wed, 13 Apr 2011 12:35:32 +0000 (08:35 -0400)]
add ptsname_r (nonstandard) and split ptsname (standard) to separate file
this eliminates the ugly static buffer in programs that use ptsname_r.
Rich Felker [Tue, 12 Apr 2011 21:52:14 +0000 (17:52 -0400)]
speed up threaded fork
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.
Rich Felker [Tue, 12 Apr 2011 17:36:22 +0000 (13:36 -0400)]
more changes for upcoming 0.7.8
Rich Felker [Tue, 12 Apr 2011 17:13:27 +0000 (13:13 -0400)]
optimize ntohl etc. in terms of bswap functions
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.
Rich Felker [Tue, 12 Apr 2011 17:04:17 +0000 (13:04 -0400)]
move bswap functions to static inline in byteswap.h
Rich Felker [Tue, 12 Apr 2011 16:18:11 +0000 (12:18 -0400)]
fix broken bswap_32
Rich Felker [Tue, 12 Apr 2011 16:03:33 +0000 (12:03 -0400)]
utmpx.h is no longer under standards, so expose ut_exit structure
Rich Felker [Tue, 12 Apr 2011 16:01:20 +0000 (12:01 -0400)]
add some traditional aliases to stat.h
Rich Felker [Tue, 12 Apr 2011 15:50:52 +0000 (11:50 -0400)]
fix printf("%.9g", 1.1) and similar not dropping trailing zeros
Rich Felker [Tue, 12 Apr 2011 15:50:14 +0000 (11:50 -0400)]
add missing rlimit macros
Rich Felker [Mon, 11 Apr 2011 14:48:52 +0000 (10:48 -0400)]
more types cleanup
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.
Rich Felker [Mon, 11 Apr 2011 14:38:00 +0000 (10:38 -0400)]
cleanup types stuff in headers, fix missing u_int*_t in sys/types.h
Rich Felker [Mon, 11 Apr 2011 05:58:14 +0000 (01:58 -0400)]
fix errno handling in scandir:
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...
Rich Felker [Mon, 11 Apr 2011 05:52:23 +0000 (01:52 -0400)]
fix fputwc return value
Rich Felker [Mon, 11 Apr 2011 05:50:26 +0000 (01:50 -0400)]
remove ugly warning-suppression hack from crypt - this invokes UB!
Rich Felker [Mon, 11 Apr 2011 04:10:26 +0000 (00:10 -0400)]
update README since we now DO have a mailing list
Rich Felker [Mon, 11 Apr 2011 02:47:43 +0000 (22:47 -0400)]
add some ugly legacy type names in sys/types.h (u_char etc.)
Rich Felker [Mon, 11 Apr 2011 02:46:46 +0000 (22:46 -0400)]
add legacy BSD-style timer*() macros in sys/time.h
Rich Felker [Sun, 10 Apr 2011 22:32:59 +0000 (18:32 -0400)]
add missing UTIME_* macros in sys/stat.h
Rich Felker [Sun, 10 Apr 2011 22:27:47 +0000 (18:27 -0400)]
add missing float.h macros
actually FLT_ROUNDS needs to expand to a static inline function that
obtains the current rounding mode and returns it, but that will be
added later with fenv.h stuff.
Rich Felker [Sat, 9 Apr 2011 06:26:55 +0000 (02:26 -0400)]
run pthread tsd destructors when a timer thread pretends to exit
Rich Felker [Sat, 9 Apr 2011 06:23:33 +0000 (02:23 -0400)]
greatly improve SIGEV_THREAD timers
calling pthread_exit from, or pthread_cancel on, the timer callback
thread will no longer destroy the timer.
Rich Felker [Sat, 9 Apr 2011 05:32:38 +0000 (01:32 -0400)]
prepare notes for 0.7.8 release
Rich Felker [Sat, 9 Apr 2011 05:17:55 +0000 (01:17 -0400)]
work around a nasty bug in linux readv syscall
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.
Rich Felker [Fri, 8 Apr 2011 16:16:24 +0000 (12:16 -0400)]
better fix sysconf pthread stack min
Rich Felker [Fri, 8 Apr 2011 16:15:37 +0000 (12:15 -0400)]
consistency with pthread stack min in limits.h
Rich Felker [Fri, 8 Apr 2011 15:56:52 +0000 (11:56 -0400)]
fix broken sigsetjmp on x86_64
Rich Felker [Fri, 8 Apr 2011 13:24:19 +0000 (09:24 -0400)]
workaround broken msghdr struct on 64bit linux
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...
Rich Felker [Fri, 8 Apr 2011 13:21:51 +0000 (09:21 -0400)]
fix ipv6 address printing: 2001 appeared as 201, etc.
Rich Felker [Fri, 8 Apr 2011 12:49:28 +0000 (08:49 -0400)]
fix broken dns response parsing code that made most ipv6 lookups fail
Rich Felker [Fri, 8 Apr 2011 12:14:28 +0000 (08:14 -0400)]
return the requested string as the "canonical name" for numeric addresses
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.
Rich Felker [Fri, 8 Apr 2011 03:18:12 +0000 (23:18 -0400)]
fix uninitialized variables in dns lookup code
Rich Felker [Fri, 8 Apr 2011 03:13:47 +0000 (23:13 -0400)]
fix bug in TRE found by clang (typo && instead of &)
Rich Felker [Thu, 7 Apr 2011 20:19:30 +0000 (16:19 -0400)]
fix misplaced *'s in string functions (harmless)
Rich Felker [Thu, 7 Apr 2011 20:13:47 +0000 (16:13 -0400)]
fix broken unsigned comparison in wcstoumax
Rich Felker [Thu, 7 Apr 2011 20:10:44 +0000 (16:10 -0400)]
fix breakage due to converting a return type to size_t in iconv...
Rich Felker [Thu, 7 Apr 2011 00:43:39 +0000 (20:43 -0400)]
fixed crash in new rsyscall (failure to set sa_flags for signal handler)
Rich Felker [Thu, 7 Apr 2011 00:32:53 +0000 (20:32 -0400)]
consistency: change all remaining syscalls to use SYS_ rather than __NR_ prefix
Rich Felker [Thu, 7 Apr 2011 00:27:07 +0000 (20:27 -0400)]
move rsyscall out of pthread_create module
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.
Rich Felker [Wed, 6 Apr 2011 23:47:50 +0000 (19:47 -0400)]
pthread exit stuff: don't bother setting errno when we won't check it.
Rich Felker [Wed, 6 Apr 2011 23:46:46 +0000 (19:46 -0400)]
fix rsyscall handler: must not clobber errno from signal context
Rich Felker [Wed, 6 Apr 2011 21:50:38 +0000 (17:50 -0400)]
fix typo in sys/msg.h
Rich Felker [Wed, 6 Apr 2011 20:40:19 +0000 (16:40 -0400)]
add startup abi functions, dummy for now. eventually needed for c++ support.
Rich Felker [Wed, 6 Apr 2011 19:47:26 +0000 (15:47 -0400)]
add _res (__res_state()) dummy
Rich Felker [Wed, 6 Apr 2011 19:44:39 +0000 (15:44 -0400)]
add IN_LOOPBACKNET constant (nonstandard but in reserved namespace)
Rich Felker [Wed, 6 Apr 2011 18:46:37 +0000 (14:46 -0400)]
document more changes for 0.7.7
Rich Felker [Wed, 6 Apr 2011 18:28:29 +0000 (14:28 -0400)]
fix prototype for strsep
Rich Felker [Wed, 6 Apr 2011 16:35:05 +0000 (12:35 -0400)]
fix completely bogus loop condition in getmntent_r
somehow this worked on my simple fstab, but horribly broke in general,
leading to use of uninitialized offset array and crashes.
Rich Felker [Wed, 6 Apr 2011 16:24:34 +0000 (12:24 -0400)]
major semaphore improvements (performance and correctness)
1. make sem_[timed]wait interruptible by signals, per POSIX
2. keep a waiter count in order to avoid unnecessary futex wake syscalls
Rich Felker [Wed, 6 Apr 2011 13:26:41 +0000 (09:26 -0400)]
fix signal-based timers with null sigevent argument
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.)
Rich Felker [Wed, 6 Apr 2011 04:02:20 +0000 (00:02 -0400)]
fix incorrect (and conflicting on LP64 archs) types for sysv ipc msgq functions
Rich Felker [Wed, 6 Apr 2011 03:58:36 +0000 (23:58 -0400)]
fix (hopefully) statvfs breakage on x86_64 that resulted from fixing i386...
Rich Felker [Tue, 5 Apr 2011 22:58:47 +0000 (18:58 -0400)]
document more changes
Rich Felker [Tue, 5 Apr 2011 22:00:28 +0000 (18:00 -0400)]
new framework to inhibit thread cancellation when needed
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.
Rich Felker [Tue, 5 Apr 2011 21:27:28 +0000 (17:27 -0400)]
add ip6 pktinfo stuff for x86_64
these defs should probably all be moved out of bits and unified...
Rich Felker [Tue, 5 Apr 2011 20:33:55 +0000 (16:33 -0400)]
add sysv ipc message queues (completely untested)
Rich Felker [Tue, 5 Apr 2011 19:45:24 +0000 (15:45 -0400)]
getopt.h is a GNU-getopt-specific header. always expose GNU functions.
Rich Felker [Tue, 5 Apr 2011 19:40:36 +0000 (15:40 -0400)]
add sysexits.h legacy header
Rich Felker [Tue, 5 Apr 2011 19:38:20 +0000 (15:38 -0400)]
implement the adjtime and adjtimex functions (nonstandard)
Rich Felker [Tue, 5 Apr 2011 18:11:14 +0000 (14:11 -0400)]
add getmntent_r interface (all of mntent is nonstandard anyway)
Rich Felker [Tue, 5 Apr 2011 18:05:11 +0000 (14:05 -0400)]
add some missing ipv6 stuff
Rich Felker [Tue, 5 Apr 2011 17:20:08 +0000 (13:20 -0400)]
implement if_indextoname and if_nametoindex functions
Rich Felker [Tue, 5 Apr 2011 16:35:09 +0000 (12:35 -0400)]
add (nonstandard) cfmakeraw function
Rich Felker [Tue, 5 Apr 2011 16:32:10 +0000 (12:32 -0400)]
add pivot_root syscall wrapper
Rich Felker [Tue, 5 Apr 2011 16:25:31 +0000 (12:25 -0400)]
add more legacy functions: setlinebuf and setbuffer
Rich Felker [Tue, 5 Apr 2011 16:13:54 +0000 (12:13 -0400)]
alternate name for syslog.h
Rich Felker [Tue, 5 Apr 2011 16:07:42 +0000 (12:07 -0400)]
uncomment IP_PKTINFO
this was a hack leftover from testing before the initial
check-in to git.
Rich Felker [Tue, 5 Apr 2011 15:16:49 +0000 (11:16 -0400)]
support the nonstandard err.h interfaces
note that unlike the originals, these do not print the program
name/argv[0] because we have not saved it anywhere. this could be
changed in __libc_start_main if desired.
Rich Felker [Tue, 5 Apr 2011 14:28:08 +0000 (10:28 -0400)]
release notes for next bugfix release
Rich Felker [Tue, 5 Apr 2011 13:27:41 +0000 (09:27 -0400)]
fix misaligned read on early string termination in strchr
this could actually cause rare crashes in the case where a short
string is located at the end of a page and the following page is not
readable, and in fact this was seen in gcc compiling certain files.
Rich Felker [Tue, 5 Apr 2011 13:24:03 +0000 (09:24 -0400)]
fix overflow in printf %N$ argument handling
Rich Felker [Tue, 5 Apr 2011 13:16:40 +0000 (09:16 -0400)]
fix various floating point rounding and formatting errors in *printf
Rich Felker [Mon, 4 Apr 2011 22:00:02 +0000 (18:00 -0400)]
release notes for 0.7.6 bugfix release
Rich Felker [Mon, 4 Apr 2011 21:26:41 +0000 (17:26 -0400)]
fix rare but nasty under-allocation bug in malloc with large requests
the bug appeared only with requests roughly 2*sizeof(size_t) to
4*sizeof(size_t) bytes smaller than a multiple of the page size, and
only for requests large enough to be serviced by mmap instead of the
normal heap. it was only ever observed on 64-bit machines but
presumably could also affect 32-bit (albeit with a smaller window of
opportunity).
Rich Felker [Mon, 4 Apr 2011 20:30:39 +0000 (16:30 -0400)]
simplify vdprintf implementation greatly based on recent vfprintf changes
since vfprintf will provide a temporary buffer in the case where the
target FILE has a zero buffer size, don't bother setting up a real
buffer for vdprintf. this also allows us to skip the call to fflush
since we know everything will be written out before vfprintf returns.
Rich Felker [Mon, 4 Apr 2011 20:24:49 +0000 (16:24 -0400)]
use a local temp buffer for unbuffered streams in vfprintf
this change makes it so most calls to fprintf(stderr, ...) will result
in a single writev syscall, as opposed to roughly 2*N syscalls (and
possibly more) where N is the number of format specifiers. in
principle we could use a much larger buffer, but it's best not to
increase the stack requirements too much. most messages are under 80
chars.
Rich Felker [Sun, 3 Apr 2011 23:51:14 +0000 (19:51 -0400)]
fix nl_langinfo to actually use the existing, correct internal version
Rich Felker [Sun, 3 Apr 2011 23:18:43 +0000 (19:18 -0400)]
make ualarm actually work (obsolete function removed from SUS)
Rich Felker [Sun, 3 Apr 2011 22:44:37 +0000 (18:44 -0400)]
fix various bugs in strtold:
0e10000000000000000000000000000000 was setting ERANGE
exponent char e/p was considered part of the match even if not
followed by a valid decimal value
"1e +10" was parsed as "1e+10"
hex digits were misinterpreted as 0..5 instead of 10..15
Rich Felker [Sun, 3 Apr 2011 22:16:11 +0000 (18:16 -0400)]
fix serious bug in strchr - char signedness
search for bytes with high bit set was giving (potentially dangerous)
wrong results. i've tested, cleaned up, and hopefully sped up this
function now.