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2013-07-17fix missing argument in variadic syscall macrosRich Felker-1/+1
for 0-argument syscalls (1 argument to the macro, the syscall number), the __SYSCALL_NARGS_X macro's ... argument was not satisfied. newer compilers seem to care about this.
2013-07-17fix error code on time conversion overflowsRich Felker-4/+4
POSIX mandates EOVERFLOW for this condition.
2013-07-17fix fd leak in file mapping code used in new zoneinfo supportRich Felker-1/+1
2013-07-17the big time handling overhaulRich Felker-348/+649
this commit has two major user-visible parts: zoneinfo-format time zones are now supported, and overflow handling is intended to be complete in the sense that all functions return a correct result if and only if the result fits in the destination type, and otherwise return an error. also, some noticable bugs in the way DST detection and normalization worked have been fixed, and performance may be better than before, but it has not been tested.
2013-07-13fix omission of dtv setup in static linked programs on TLS variant I archsRich Felker-1/+1
apparently this was never noticed before because the linker normally optimizes dynamic TLS models to non-dynamic ones when static linking, thus eliminating the calls to __tls_get_addr which crash when the dtv is missing. however, some libsupc++ code on ARM was calling __tls_get_addr when static linked and crashing. the reason is unclear to me, but with this issue fixed it should work now anyway.
2013-07-10add PIE support for ARMRich Felker-0/+30
2013-07-10add some ARM EABI-specific exception handling infrastructureRich Felker-0/+42
patch by Timo Teräs
2013-07-10fix invalid library phdr pointers passed to callback from dl_iterate_phdrRich Felker-9/+16
map_library was saving pointers to an automatic-storage buffer rather than pointers into the mapping. this should be a fairly simple fix, but the patch here is slightly complicated by two issues: 1. supporting gratuitously obfuscated ELF files where the program headers are not right at the beginning of the file. 2. cleaning up the map_library function so that data isn't clobbered by the time we need it.
2013-07-09fix a couple misleading/wrong signal descriptions in strsignalRich Felker-2/+2
there are still several more that are misleading, but SIGFPE (integer division error misdescribed as floating point) and and SIGCHLD (possibly non-exit status change events described as exiting) were the worst offenders.
2013-07-09add realtime signals to strsignalRich Felker-3/+19
the name format RTnn/RTnnn was chosen to minimized bloat while uniquely identifying the signal.
2013-07-09fix off-by-one array bound in strsignalRich Felker-1/+1
2013-07-09fix bogus lazy allocation in ctermid and missing malloc failure checkRich Felker-10/+7
also clean up, optimize, and simplify the code, removing branches by simply pre-setting the result string to an empty string, which will be preserved if other operations fail.
2013-07-09fix fd leak on races and cancellation in ctermidRich Felker-2/+3
2013-07-09fix missing SOCK_CLOEXEC in various functions that use sockets internallyRich Felker-4/+4
2013-07-06add NFDBITS in sys/select.h with appropriate feature testsRich Felker-0/+3
the main use for this macro seems to be knowing the correct allocation granularity for dynamic-sized fd_set objects. such usage is non-conforming and results in undefined behavior, but it is widespread in applications.
2013-07-04move core memalign code from aligned_alloc to __memalignRich Felker-49/+55
there are two motivations for this change. one is to avoid gratuitously depending on a C11 symbol for implementing a POSIX function. the other pertains to the documented semantics. C11 does not define any behavior for aligned_alloc when the length argument is not a multiple of the alignment argument. posix_memalign on the other hand places no requirements on the length argument. using __memalign as the implementation of both, rather than trying to implement one in terms of the other when their documented contracts differ, eliminates this confusion.
2013-07-04move alignment check from aligned_alloc to posix_memalignRich Felker-1/+2
C11 has no requirement that the alignment be a multiple of sizeof(void*), and in fact seems to require any "valid alignment supported by the implementation" to work. since the alignment of char is 1 and thus a valid alignment, an alignment argument of 1 should be accepted.
2013-07-03add legacy sys/ttydefaults.h headerrofl0r-0/+39
2013-07-03add legacy scsi/scsi_ioctl.h headerrofl0r-0/+11
2013-07-03paths.h: remove cruftrofl0r-9/+0
a research in debian codesearch and grepping over the pkgsrc directory tree have shown that these macros are all either unused, or defined by programs in case they need them.
2013-07-01add stubs for additional legacy ether.h functionsRich Felker-3/+18
these would not be expensive to actually implement, but reading /etc/ethers does not sound like a particularly useful feature, so for now I'm leaving them as stubs.
2013-07-01fix Makefile so "make install" works before include/bits symlink existsRich Felker-1/+5
previously, determination of the list of header files for installation depended on the include/bits symlink (to the arch-specific files) already having been created. in other words, running "make install" immediately after configure without first running "make" caused the bits headers not to be installed. the solution I have applied is to pull the list of headers directly from arch/$(ARCH)/bits rather than include/bits, and likewise to install directly from arch/$(ARCH)/bits rather than via the symlink. at this point, the only purpose served by keeping the symlink around is that it enables use of the in-tree headers and libs directly via -I and -L, which can be useful when testing against a new version of the library before installing it. on the other hand, removing the bits symlink would be beneficial if we ever want to support building multiple archs in the same source tree.
2013-06-29release notes for 0.9.11v0.9.11Rich Felker-0/+43
2013-06-29fix failure of mbsrtowcs to record stop position when dest is fullRich Felker-1/+4
2013-06-29fix shifts possibly larger than type in major() macroRich Felker-1/+1
in theory this should not be an issue, since major() should only be applied to type dev_t, which is 64-bit. however, it appears some applications are not using dev_t but a smaller integer type (which works on Linux because the kernel's dev_t is really only 32-bit). to avoid the undefined behavior, do it as two shifts.
2013-06-29implement minimal dlinfo functionRich Felker-0/+23
2013-06-29add some comments about the mips ksigaction structure weirdnessRich Felker-0/+6
2013-06-29fix missing synchronization in calls from dynamic linker to global ctorsRich Felker-0/+4
this change is needed to correctly handle the case where a constructor creates a new thread which calls dlopen. previously, the lock was not held in this case. the reason for the complex logic to avoid locking whenever possible is that, since the mutex is recursive, it will need to inspect the thread pointer to get the current thread's tid, and this requires initializing the thread pointer. we do not want non-multi-threaded programs to attempt to access the thread pointer unnecessarily; doing so could make them crash on ancient kernels that don't support threads but which may otherwise be capable of running the program.
2013-06-29prevent shmget from allocating objects that overflow ptrdiff_tRich Felker-0/+2
rather than returning an error, we have to increase the size argument so high that the kernel will have no choice but to fail. this is because POSIX only permits the EINVAL error for size errors when a new shared memory segment would be created; if it already exists, the size argument must be ignored. unfortunately Linux is non-conforming in this regard, but I want to keep the code correct in userspace anyway so that if/when Linux is fixed, the behavior applications see will be conforming.
2013-06-28work around wrong kernel type for sem_nsems member of struct semid_dsRich Felker-1/+16
rejecting invalid values for n is fine even in the case where a new sem will not be created, since the kernel does its range checks on n even in this case as well. by default, the kernel will bound the limit well below USHRT_MAX anyway, but it's presumably possible that an administrator could override this limit and break things.
2013-06-28add missing type shmatt_t in sys/shm.hRich Felker-0/+2
this type is not really intended to be used; it's just there to allow implementations to choose the type for the shm_nattch member of struct shmid_sh, presumably since historical implementations disagreed on the type. in any case, it needs to be there, so now it is.
2013-06-28implement week-based-year year numbers in strftimeRich Felker-27/+34
in the process, I refactored the week-number code so it can be used by the week-based-year formats to determine year adjustments at the boundary values. this also improves indention/code readability.
2013-06-28fix breakage in last commit to strftime due to missing INT_MAXRich Felker-0/+1
that's what I get for changing a hard-coded threshold to a proper non-magic-number without testing.
2013-06-28implement week numbers and half of the week-based-year logic for strftimeRich Felker-3/+38
output for plain week numbers (%U and %W) has been sanity-checked, and output for the week-based-year week numbers (%V) has been checked extensively against known-good data for the full non-negative range of 32-bit time_t. year numbers for week-based years (%g and %G) are not yet implemented.
2013-06-27minor compatibility fixes in utmp.h and fixing mismatch with paths.hRich Felker-4/+10
the pathnames prefixed with /dev/null/ are guaranteed never to be valid. the previous use of /dev/null alone was mildly dangerous in that bad software might attempt to unlink the name when it found a non-regular file there and create a new file.
2013-06-27disallow creation of objects larger than PTRDIFF_MAX via mmapRich Felker-0/+5
internally, other parts of the library assume sizes don't overflow ssize_t and/or ptrdiff_t, and the way this assumption is made valid is by preventing creating of such large objects. malloc already does so, but the check was missing from mmap. this is also a quality of implementation issue: even if the implementation internally could handle such objects, applications could inadvertently invoke undefined behavior by subtracting pointers within an object. it is very difficult to guard against this in applications, so a good implementation should simply ensure that it does not happen.
2013-06-26fix syscall argument bug in pthread_getschedparamRich Felker-1/+1
the address of the pointer to the sched param, rather than the pointer, was being passed to the kernel.
2013-06-26fix temp file leak in sem_open on successful creation of new semaphoreRich Felker-2/+2
2013-06-26fix bug whereby sem_open leaked its own internal slots on failureRich Felker-3/+6
2013-06-26in sem_open, don't leak vm mapping if fstat failsRich Felker-2/+2
fstat should not fail under normal circumstances, so this fix is mostly theoretical.
2013-06-26fix failure of pthread_setschedparam to pass correct param to kernelRich Felker-1/+1
the address of the pointer, rather than the pointer, was being passed. this was probably a copy-and-paste error from corresponding get code.
2013-06-26document in sysconf and unistd.h that per-thread cpu clocks existRich Felker-1/+2
2013-06-26fix iconv conversion to legacy 8bit codepagesRich Felker-2/+2
this seems to have been a simple copy-and-paste error from the code for converting from legacy codepages.
2013-06-26remove useless conditional before free from dynamic linker path codeRich Felker-1/+1
2013-06-26fix dynamic linker handling of empty path file or error reading path fileRich Felker-4/+3
previously, the path string was being used despite being invalid. with this change, empty path file or error reading the path file is treated as an empty path. this is preferable to falling back to a default path, so that attacks to prevent reading of the path file could not result in loading incorrect and possibly dangerous (outdated or mismatching ABI) libraries from. the code to strip the final newline has also been removed; now that newline is accepted as a delimiter, it's harmless to leave it in place.
2013-06-25respect iso c namespace in stdio.h and wchar.h regarding va_listRich Felker-17/+26
despite declaring functions that take arguments of type va_list, these headers are not permitted by the c standard to expose the definition of va_list, so an alias for the type must be used. the name __isoc_va_list was chosen to convey that the purpose of this alternate name is for iso c conformance, and to avoid the multitude of names which gcc mangles with its hideous "fixincludes" monstrosity, leading to serious header breakage if these "fixes" are run.
2013-06-25make newline-delimited dynamic linker path file actually workRich Felker-1/+1
apparently the original commit was never tested properly, since getline was only ever reading one line. the intent was to read the entire file, so use getdelim with the null byte as delimiter as a cheap way to read a whole file into memory.
2013-06-25implement inet_lnaof, inet_netof, and inet_makeaddrRich Felker-40/+59
also move all legacy inet_* functions into a single file to avoid wasting object file and compile time overhead on them. the added functions are legacy interfaces for working with classful ipv4 network addresses. they have no modern usefulness whatsoever, but some programs unconditionally use them anyway, and they're tiny.
2013-06-25add ether_aton[_r] and ether_ntoa[_r] functionsRich Felker-0/+57
based on patch by Strake with minor stylistic changes, and combined into a single file. this patch remained open for a long time due to some question as to whether ether_aton would be better implemented in terms of sscanf, and it's time something was committed, so here it is.
2013-06-22fix scanf %c conversion wrongly storing a terminating null byteRich Felker-4/+8
this seems to have been a regression from the refactoring which added the 'm' modifier.