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2013-04-04minor optimization to mbstowcsRich Felker-2/+1
there is no need to zero-fill an mbstate_t object in the caller; mbsrtowcs will automatically treat a null pointer as the initial state.
2013-04-04fix incorrect range checks in wcsrtombsRich Felker-3/+3
negative values of wchar_t need to be treated in the non-ASCII case so that they can properly generate EILSEQ rather than getting truncated to 8bit values and stored in the output.
2013-04-04overhaul mbsrtowcsRich Felker-69/+64
these changes fix at least two bugs: - misaligned access to the input as uint32_t for vectorized ASCII test - incorrect src pointer after stopping on EILSEQ in addition, the text of the standard makes it unclear whether the mbstate_t object is to be modified when the destination pointer is null; previously it was cleared either way; now, it's only cleared when the destination is non-null. this change may need revisiting, but it should not affect most applications, since calling mbsrtowcs with non-zero state can only happen when the head of the string was already processed with mbrtowc. finally, these changes shave about 20% size off the function and seem to improve performance by 1-5%.
2013-04-02re-add useconds_trofl0r-0/+8
this type was removed back in 5243e5f1606a9c6fcf01414e , because it was removed from the XSI specs. however some apps use it. since it's in the POSIX reserved namespace, we can expose it unconditionally.
2013-04-02add arpa/nameser_compat.hrofl0r-0/+2
the contents of this header are already in arpa/nameser.h
2013-04-02make tm_zone etc visible under _GNU_SOURCErofl0r-1/+1
2013-04-02__time_to_tm: initialize tm_zone and tm_gmtoffrofl0r-0/+2
2013-04-01add syscall numbers for the new kcmp and finit_module syscallsSzabolcs Nagy-9/+46
and remove syscall todos from microblaze
2013-04-01add the new SO_REUSEPORT socket option to mips and powerpcSzabolcs Nagy-1/+2
SO_REUSEPORT implementation was merged in the linux kernel commit c617f398edd4db2b8567a28e899a88f8f574798d 2013-01-23
2013-04-01add new socket options to sys/socket.h following linuxSzabolcs Nagy-2/+17
2013-04-01adding ethernet protocol ids to if_ether.h following linuxSzabolcs Nagy-0/+15
2013-04-01add ADJ_SETOFFSET timex mode bit (new in linux v2.6.39)Szabolcs Nagy-0/+1
2013-04-01add new linux tcp socket option flags to netinet/tcp.hSzabolcs Nagy-0/+10
2013-04-01fix typo in setpriority syscall wrapperRich Felker-1/+1
2013-03-31provide prototype for pthread_getattr_npRich Felker-0/+4
2013-03-31implement pthread_getattr_npRich Felker-2/+31
this function is mainly (purely?) for obtaining stack address information, but we also provide the detach state since it's easy to do anyway.
2013-03-26remove __SYSCALL_SSLEN arch macro in favor of using public _NSIGRich Felker-35/+27
the issue at hand is that many syscalls require as an argument the kernel-ABI size of sigset_t, intended to allow the kernel to switch to a larger sigset_t in the future. previously, each arch was defining this size in syscall_arch.h, which was redundant with the definition of _NSIG in bits/signal.h. as it's used in some not-quite-portable application code as well, _NSIG is much more likely to be recognized and understood immediately by someone reading the code, and it's also shorter and less cluttered. note that _NSIG is actually 65/129, not 64/128, but the division takes care of throwing away the off-by-one part.
2013-03-26provide emulation of fcntl F_DUPFD_CLOEXEC on old kernelsRich Felker-0/+16
I'm not entirely happy with the amount of ugliness here, but since F_DUPFD_CLOEXEC is used elsewhere in code that's expected to work on old kernels (popen), it seems necessary. reportedly even some modern kernels went back and broke F_DUPFD_CLOEXEC (making it behave like plain F_DUPFD), so it might be necessary to add some additional fixup code later to deal with that issue too.
2013-03-25in pipe2, use pipe() rather than __syscall(SYS_pipe, ...) for fallbackRich Felker-3/+3
SYS_pipe is not usable directly in general, since mips has a very broken calling convention for the pipe syscall. instead, just call the function, so that the mips-specific ugliness is isolated in mips/pipe.s and not copied elsewhere.
2013-03-24rewrite popen to use posix_spawn instead of fragile vfork hacksRich Felker-41/+41
2013-03-24remove cruft from pre-posix_spawn version of the system functionRich Felker-6/+0
2013-03-23add deprecated SIGIOT alias for SIGABRTRich Felker-1/+5
reportedly some programs (e.g. showkeys in the kbd package) use it.
2013-03-23fix multiple bugs in syslog interfacesRich Felker-24/+27
1. as reported by William Haddon, the value returned by snprintf was wrongly used as a length passed to sendto, despite it possibly exceeding the buffer length. this could lead to invalid reads and leaking additional data to syslog. 2. openlog was storing a pointer to the ident string passed by the caller, rather than copying it. this bug is shared with (and even documented in) other implementations like glibc, but such behavior does not seem to meet the requirements of the standard. 3. extremely long ident provided to openlog, or corrupt ident due to the above issue, could possibly have resulted in buffer overflows. despite having the potential for smashing the stack, i believe the impact is low since ident points to a short string literal in typical application usage (and per the above bug, other usages will break horribly on other implementations). 4. when used with LOG_NDELAY, openlog was not connecting the newly-opened socket; sendto was being used instead. this defeated the main purpose of LOG_NDELAY: preparing for chroot. 5. the default facility was not being used at all, so all messages without an explicit facility passed to syslog were getting logged at the kernel facility. 6. setlogmask was not thread-safe; no synchronization was performed updating the mask. the fix uses atomics rather than locking to avoid introducing a lock in the fast path for messages whose priority is not in the mask. 7. in some code paths, the syslog lock was being unlocked twice; this could result in releasing a lock that was actually held by a different thread. some additional enhancements to syslog such as a default identifier based on argv[0] or similar may still be desired; at this time, only the above-listed bugs have been fixed.
2013-03-09remove soname from libc.so/ld-muslRich Felker-1/+1
it serves no purpose (binaries linked against musl as -lc/libc.so automatically get the right DT_NEEDED value of libc.so) and causes ldconfig to misbehave (making a symlink to ld-musl named libc.so in /lib). ldconfig is not used on pure musl systems, but if ld-musl is installed on a system where it's not the primary libc, this will pollute the system /lib with a symlink to musl named libc.so, which should NOT exist and could cause problems linking native apps. also, the existence of the soname caused spurious warnings from ldconfig when /lib and /usr/lib were the same physical directory.
2013-03-06fix epoll structure alignment on non-x86_64 archsRich Felker-1/+5
this fix is far from ideal and breaks the rule of not using arch-specific #ifdefs, but for now we just need a solution to the existing breakage. the underlying problem is that the kernel folks made a very stupid decision to make misalignment of this struct part of the kernel API/ABI for x86_64, in order to avoid writing a few extra lines of code to handle both 32- and 64-bit userspace on 64-bit kernels. I had just added the packed attribute unconditionally thinking it was harmless on 32-bit archs, but non-x86 32-bit archs have 8-byte alignment on 64-bit types.
2013-03-06fix missing type error in grp.h from adding fgetgrentRich Felker-0/+4
2013-03-04fix types for wctype_t and wctrans_tRich Felker-16/+16
wctype_t was incorrectly "int" rather than "long" on x86_64. not only is this an ABI incompatibility; it's also a major design flaw if we ever wanted wctype_t to be implemented as a pointer, which would be necessary if locales support custom character classes, since int is too small to store a converted pointer. this commit fixes wctype_t to be unsigned long on all archs, matching the LSB ABI; this change does not matter for C code, but for C++ it affects mangling. the same issue applied to wctrans_t. glibc/LSB defines this type as const __int32_t *, but since no such definition is visible, I've just expanded the definition, int, everywhere. it would be nice if these types (which don't vary by arch) could be in wctype.h, but the OB XSI requirement in POSIX that wchar.h expose some types and functions from wctype.h precludes doing so. glibc works around this with some hideous hacks, but trying to duplicate that would go against the intent of musl's headers.
2013-03-04fix some obscure header type size/alignment issuesRich Felker-10/+9
2013-02-26fix wrong float_t on x86_64Rich Felker-1/+1
x86_64 does not have excess precision, at all
2013-02-26fix cruft in utmp.h that was broken by changes in utmpx.hRich Felker-3/+0
patch by Chris Spiegel.
2013-02-26fix integer type issue in strverscmpRich Felker-1/+3
lenl-lenr is not a valid expression for a signed int return value from strverscmp, since after implicit conversion from size_t to int this difference could have the wrong sign or might even be zero. using the difference for char values works since they're bounded well within the range of differences representable by int, but it does not work for size_t values.
2013-02-26implement non-stub strverscmpRich Felker-2/+35
patch by Isaac Dunham.
2013-02-26namespace conformance to latest standards in strings.hRich Felker-4/+6
2013-02-21replace stub with working strcasestrRich Felker-2/+4
2013-02-21fix wrong return value from wmemmove on forward copiesRich Felker-1/+2
2013-02-21scsci/sg.h: fix usage of undefined macro HZrofl0r-1/+1
this macro is 100 on all archs, at least in userspace, according to kernel headers.
2013-02-21add arpa/ftp.hrofl0r-0/+35
2013-02-20use memcmp instead of str[n]cmp for temp function XXXXXX checkingRich Felker-2/+2
2013-02-20fix error cases in mkostemps coreRich Felker-6/+3
1. wrong return value and missing errno for negative suffix len 2. failure to catch suffix len > strlen 3. remove unwanted clearing of input string in invalid case
2013-02-20remove leftover unused variable in mktemp after refactoringRich Felker-1/+0
2013-02-20add mkostemp, mkstemps, and mkostemps functions and reorganize temp internalsRich Felker-29/+91
based on patch contributed by Anthony G. Basile (blueness) some issues remain with the filename generation algorithm and other small bugs, but this patch has been sitting around long enough that I feel it's best to get it committed and then work out any remaining issues.
2013-02-17remove unused #undef environ now that libc.h no longer #defines itRich Felker-1/+0
2013-02-17consistently use the internal name __environ for environRich Felker-5/+4
patch by Jens Gustedt. previously, the intended policy was to use __environ in code that must conform to the ISO C namespace requirements, and environ elsewhere. this policy was not followed in practice anyway, making things confusing. on top of that, Jens reported that certain combinations of link-time optimization options were breaking with the inconsistent references; this seems to be a compiler or linker bug, but having it go away is a nice side effect of the changes made here.
2013-02-17add fgetgrent functionRich Felker-0/+13
based on patch by Isaac Dunham, moved to its own file to avoid increasing bss on static linked programs not using this nonstandard function but using the standard getgrent function, and vice versa.
2013-02-07fix typo in newly-added error message for EOWNERDEADRich Felker-1/+1
2013-02-07improve error stringsRich Felker-27/+30
this definitely has the potential to be a bikeshed topic, so some justification is in order. most of the changes made fit into one of the following categories: 1. alignment with text in posix, xsh 2.3 2. eliminating overly-specific text for shared error codes 3. making the message match more closely with the macro name 4. removing extraneous words in particular, the EAGAIN/EWOULDBLOCK text is updated to match the description of EAGAIN (which covers both uses) rather than saying the operation would block, and ENOTSUP/EOPNOTSUPP is updated not to mention sockets. the distinction between ENFILE/EMFILE has also been clarified; ENFILE is aligned with the posix text, and EMFILE, which lacks concise posix text matching any historic message, is updated to emphasize that the exhausted resource is not open files/open file descriptions, but rather the integer 'address space' of file descriptors. some messages may be further tweaked based on feedback.
2013-02-06arm: add __aeabi_atexit()rofl0r-0/+6
arm eabi requires this symbol for static C++ dtors. usually it is provided by libstdc++, but when a C++ program doesn't use the std lib (free-standing), the libc has to provide it. this was encountered while building transmission, which depends on such a C++ library (libutp). this function is nearly identical to __cxa_atexit, but it has the order of argumens swapped for "performance reasons". see page 25 of http://infocenter.arm.com/help/topic/com.arm.doc.ihi0043d/IHI0043D_rtabi.pdf there are other aeabi specific C++ support functions missing, but it is not clear yet that GCC makes use of them so we omit them for the moment.
2013-02-06Makefile: make it possible to build arch specific C filesrofl0r-1/+1
2013-02-03base system() on posix_spawnRich Felker-41/+26
this avoids duplicating the fragile logic for executing an external program without fork.
2013-02-03fix unsigned comparison bug in posix_spawnRich Felker-1/+1
read should never return anything but 0 or sizeof ec here, but if it does, we want to treat any other return as "success". then the caller will get back the pid and is responsible for waiting on it when it immediately exits.
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