Since Linux 4.13, kernel limits the maximum command line arguments
length to 6 MiB [1]. Normally the limit is still quarter of the maximum
stack size but if that limit exceeds 6 MiB it's clamped down.
glibc's __sysconf implementation for Linux platform is not aware of
this limitation and for stack sizes of over 24 MiB it returns higher
ARG_MAX than Linux will actually accept. This can be verified by
executing the following application on Linux 4.13 or newer:
#include <stdio.h>
#include <string.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
int main(void) {
const struct rlimit rlim = { 40 * 1024 * 1024,
40 * 1024 * 1024 };
if (setrlimit(RLIMIT_STACK, &rlim) < 0) {
perror("setrlimit: RLIMIT_STACK");
return 1;
}
printf("ARG_MAX : %8ld\n", sysconf(_SC_ARG_MAX));
printf("63 * 100 KiB: %8ld\n", 63L * 100 * 1024);
printf("6 MiB : %8ld\n", 6L * 1024 * 1024);
char str[100 * 1024], *argv[64], *envp[1];
memset(&str, 'A', sizeof str);
str[sizeof str - 1] = '\0';
for (size_t i = 0; i < sizeof argv / sizeof *argv - 1; ++i) {
argv[i] = str;
}
argv[sizeof argv / sizeof *argv - 1] = envp[0] = 0;
execve("/bin/true", argv, envp);
perror("execve");
return 1;
}
On affected systems the program will report ARG_MAX as 10 MiB but
despite that executing /bin/true with a bit over 6 MiB of command line
arguments will fail with E2BIG error. Expected result is that ARG_MAX
is reported as 6 MiB.
Update the __sysconf function to clamp ARG_MAX value to 6 MiB if it
would otherwise exceed it. This resolves bug #25305 which was market
WONTFIX as suggested solution was to cap ARG_MAX at 128 KiB.
As an aside and point of comparison, bionic (a libc implementation for
Android systems) decided to resolve this issue by always returning 128
KiB ignoring any potential xargs regressions [2].
On older kernels this results in returning overly conservative value
but that's a safer option than being aggressive and returning invalid
value on recent systems. It's also worth noting that at this point
all supported Linux releases have the 6 MiB barrier so only someone
running an unsupported kernel version would get incorrectly truncated
result.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
[1] See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=da029c11e6b12f321f36dac8771e833b65cec962
[2] See baed51ee3a
Add _SC_MINSIGSTKSZ for the minimum signal stack size derived from
AT_MINSIGSTKSZ, which is the minimum number of bytes of free stack
space required in order to gurantee successful, non-nested handling
of a single signal whose handler is an empty function, and _SC_SIGSTKSZ
which is the suggested minimum number of bytes of stack space required
for a signal stack.
If AT_MINSIGSTKSZ isn't available, sysconf (_SC_MINSIGSTKSZ) returns
MINSIGSTKSZ. On Linux/x86 with XSAVE, the signal frame used by kernel
is composed of the following areas and laid out as:
------------------------------
| alignment padding |
------------------------------
| xsave buffer |
------------------------------
| fsave header (32-bit only) |
------------------------------
| siginfo + ucontext |
------------------------------
Compute AT_MINSIGSTKSZ value as size of xsave buffer + size of fsave
header (32-bit only) + size of siginfo and ucontext + alignment padding.
If _SC_SIGSTKSZ_SOURCE or _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ
are redefined as
/* Default stack size for a signal handler: sysconf (SC_SIGSTKSZ). */
# undef SIGSTKSZ
# define SIGSTKSZ sysconf (_SC_SIGSTKSZ)
/* Minimum stack size for a signal handler: SIGSTKSZ. */
# undef MINSIGSTKSZ
# define MINSIGSTKSZ SIGSTKSZ
Compilation will fail if the source assumes constant MINSIGSTKSZ or
SIGSTKSZ.
The reason for not simply increasing the kernel's MINSIGSTKSZ #define
(apart from the fact that it is rarely used, due to glibc's shadowing
definitions) was that userspace binaries will have baked in the old
value of the constant and may be making assumptions about it.
For example, the type (char [MINSIGSTKSZ]) changes if this #define
changes. This could be a problem if an newly built library tries to
memcpy() or dump such an object defined by and old binary.
Bounds-checking and the stack sizes passed to things like sigaltstack()
and makecontext() could similarly go wrong.
I used these shell commands:
../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")
and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
The Linux 3.2 clock_getres kernel code (kernel/posix-cpu-timers.c)
issued for clock_getres CLOCK_PROCESS_CPUTIME_ID (process_cpu_clock_getres)
and CLOCK_THREAD_CPUTIME_ID (thread_cpu_clock_getres) call
posix_cpu_clock_getres. And it fails on check_clock only if an invalid
clock is used (not the case) or if we pass an invalid the pid/tid in
29 msb of clock_id (not the case either).
This patch assumes that clock_getres syscall always support
CLOCK_PROCESS_CPUTIME_ID and CLOCK_THREAD_CPUTIME_ID, so there is no need
to fallback to hp-timing support for _SC_MONOTONIC_CLOCK neither to issue
the syscall to certify the clock_id is supported bt the kernel. This
allows simplify the sysconf support to always use the syscall.
it also removes ia64 itc drift check and assume kernel handles it correctly.
Checked on aarch64-linux-gnu, x86_64-linux-gnu, and i686-linux-gnu.
* sysdeps/unix/sysv/linux/ia64/has_cpuclock.c: Remove file.
* sysdeps/unix/sysv/linux/ia64/sysconf.c: Likewise.
* sysdeps/unix/sysv/linux/sysconf.c (has_cpuclock): Remove function.
(__sysconf): Assume kernel support for _SC_MONOTONIC_CLOCK,
_SC_CPUTIME, and _SC_THREAD_CPUTIME.
This patch consolidates all the non cancellable read calls to use
the __read_nocancel identifier. For non cancellable targets it will
be just a macro to call the default respective symbol while on Linux
will be a internal one.
Also, since it is used on libcrypto it is also exported in GLIBC_PRIVATE
namespace.
Checked on x86_64-linux-gnu, x86_64-linux-gnu-x32, and i686-linux-gnu.
* sysdeps/generic/not-cancel.h (read_not_cancel): Remove macro.
(__read_nocancel): New macro.
* sysdeps/unix/sysv/linux/Versions (libc) [GLIBC_PRIVATE]: Add
__read_nocancel.
* sysdeps/unix/sysv/linux/not-cancel.h (__read_nocancel): Remove
macro.
(__read_nocancel): New prototype.
* sysdeps/unix/sysv/linux/read.c (__read_nocancel): New function.
* catgets/open_catalog.c (__open_catalog): Replace read_not_cancel
with __read_nocancel.
* intl/loadmsgcat.c (read): Likewise.
* libio/fileops.c (_IO_file_read): Likewise.
* locale/loadlocale.c (_nl_load_locale): Likewise.
* login/utmp_file.c (getutent_r_file): Likewise.
(internal_getut_r): Likewise.
(getutline_r_file): Likewise.
* sysdeps/unix/sysv/linux/fips-private.h (fips_enable_p): Likewise.
* sysdeps/unix/sysv/linux/gethostid.c (gethostid): Likewise.
* sysdeps/unix/sysv/linux/getloadavg.c (getloadavg): Likewise.
* sysdeps/unix/sysv/linux/getlogin_r.c (__getlogin_r_loginuid):
Likewise.
* sysdeps/unix/sysv/linux/getsysstats.c (next_line): Likewise.
* sysdeps/unix/sysv/linux/i386/smp.h (is_smp_system): Likewise.
* sysdeps/unix/sysv/linux/ia64/has_cpuclock.c (has_cpuclock):
Likewise.
* sysdeps/unix/sysv/linux/libc_fatal.c (backtrace_and_maps):
Likewise.
* sysdeps/unix/sysv/linux/malloc-sysdep.h (check_may_shrink_heap):
Likewise.
* sysdeps/unix/sysv/linux/pthread_getname.c (pthread_getname_np):
Likewise.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Likewise.
This patch does some initial cleanup, following the move to 2.6.32
minimum kernel version, by removing __LINUX_KERNEL_VERSION
conditionals that are now always-true or always-false. In the case of
__ASSUME_ARG_MAX_STACK_BASED, where the conditional used a kernel
version that was itself in a macro, the associated sysconf.c code is
also cleaned up and __ASSUME_ARG_MAX_STACK_BASED removed completely.
Tested x86_64 that disassembly of installed shared libraries is
unchanged by the patch.
* sysdeps/unix/sysv/linux/kernel-features.h [__s390__]
(__ASSUME_UTIMES): Do not condition on kernel version.
(__ASSUME_PSELECT): Define unconditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_ATFCTS): Likewise.
(__ASSUME_SET_ROBUST_LIST): Do not condition on kernel version.
(__ASSUME_COMPLETE_READV_WRITEV): Define unconditionally.
(__ASSUME_FUTEX_LOCK_PI): Do not condition on kernel version.
(__ASSUME_UTIMENSAT): Define unconditionally.
(__ASSUME_PRIVATE_FUTEX): Likewise.
(__ASSUME_FALLOCATE): Likewise.
(__ASSUME_O_CLOEXEC): Likewise.
(__LINUX_ARG_MAX_STACK_BASED_MIN_KERNEL): Remove.
(__ASSUME_ARG_MAX_STACK_BASED): Likewise.
(__ASSUME_ADJ_OFFSET_SS_READ): Define unconditionally.
(__ASSUME_SOCK_CLOEXEC): Do not condition on kernel version.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
[__x86_64__ || __sparc__] (__ASSUME_ACCEPT4_SYSCALL): Likewise.
(__ASSUME_FUTEX_CLOCK_REALTIME): Define unconditionally.
(__ASSUME_AT_RANDOM): Likewise.
(__ASSUME_PREADV): Likewise.
(__ASSUME_PWRITEV): Likewise.
(__ASSUME_REQUEUE_PI): Do not condition on kernel version.
(__ASSUME_F_GETOWN_EX): Define unconditionally.
(__ASSUME_XFS_RESTRICTED_CHOWN): Likewise.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
[!__ASSUME_ARG_MAX_STACK_BASED]: Remove conditional code.
* sysdeps/unix/sysv/linux/alpha/kernel-features.h
(__ASSUME_O_CLOEXEC): Define unconditionally.
(__ASSUME_PSELECT): Do not undefine conditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_ATFCTS): Likewise.
(__ASSUME_SET_ROBUST_LIST): Likewise.
(__ASSUME_UTIMENSAT): Likewise.
(__ASSUME_FDATASYNC): Define unconditionally.
* sysdeps/unix/sysv/linux/arm/kernel-features.h
(__ASSUME_SIGFRAME_V2): Likewise.
)__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_PSELECT): Do not undefine conditionally.
(__ASSUME_PPOLL): Likewise.
* sysdeps/unix/sysv/linux/ia64/kernel-features.h
(__ASSUME_PSELECT): Define unconditionally.
(__ASSUME_PPOLL): Likewise.
(__ASSUME_O_CLOEXEC): Likewise.
(__ASSUME_SOCK_CLOEXEC): Likewise.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
* sysdeps/unix/sysv/linux/m68k/kernel-features.h
(__ASSUME_O_CLOEXEC): Likewise.
(__ASSUME_SOCK_CLOEXEC): Likewise.
(__ASSUME_IN_NONBLOCK): Likewise.
(__ASSUME_PIPE2): Likewise.
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_DUP3): Likewise.
* sysdeps/unix/sysv/linux/mips/kernel-features.h
(__ASSUME_EVENTFD2): Likewise.
(__ASSUME_SIGNALFD4): Likewise.
(__ASSUME_ACCEPT4_SYSCALL): Likewise.
<linux/limits.h> has defined it.
* sysdeps/unix/sysv/linux/sys/param.h: Define NCARGS to the legacy
ARG_MAX value and prevent ARG_MAX from being defined by the kernel
headers.
* sysdeps/unix/sysv/linux/sysconf.c: Define legacy_ARG_MAX and use
it instead of ARG_MAX.
rather than #ifdef _POSIX_FOO for options. We should return -1
at runtime for an option defined to 0 at compile time.
* sysdeps/mach/hurd/bits/posix_opt.h: Define many missing options,
many to -1 or 0.
2006-03-05 Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
[__NR_clock_getres || HP_TIMING_AVAIL]: Handle _SC_CPUTIME,
_SC_THREAD_CPUTIME.
2004-03-12 Ulrich Drepper <drepper@redhat.com>
* posix/getconf.c (vars): Add _SC_ values for cache information.
* sysdeps/generic/bits/confname.h: Add _SC_* values for cache
information.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Reorganize to
allow yet another sysconf function to include the one in this file.
* sysdeps/unix/sysv/linux/i386/sysconf.c: New file.
* sysdeps/generic/sysconf.c: Add default handling for cache line info.
2004-02-24 Arnold D. Robbins <arnold@skeeve.com>
* posix/regex_internal.c (build_wcs_upper_buffer): Enclose
`offsets_needed' label in `#ifdef _LIBC' to silence `unused label'
compiler warning.
2004-02-24 Nelson H.F. Beebe <beebe@math.utah.edu>
* posix/regex_internal.c (build_wcs_buffer): Add cast to char* in call
to `wcrtomb'.
* posix/regex_internal.h (bitset_not, bitset_merge, bitset_not_merge,
bitset_mask, re_string_char_size_a, re_string_wchar_at,
re_string_elem_size_at): Change to use prototypes.
(re_string_char_size_at, re_string_wchar_at,
re_string_elem_size_at): Declare as `internal_function'.
Add comment.
(atomic_decrement_and_test): Add comment.
2003-03-22 Jakub Jelinek <jakub@redhat.com>
* include/atomic.h (atomic_compare_and_exchange_val_acq): Add comment.
Don't define if __arch_compare_and_exchange_val_32_acq is not defined.
(atomic_compare_and_exchange_bool_acq): Add comment. Don't use
__oldval variable in the macro, since it might be macro argument.
(atomic_decrement_if_positive): Initialize __memp, remove setting
of non-existent variable.
(atomic_bit_test_set): Cast 1 to __typeof (*mem) before shifting.
* sysdeps/ia64/bits/atomic.h (atomic_exchange_and_add): Implement
using atomic_compare_and_exchange_val_acq.
(atomic_decrement_if_positive, atomic_bit_test_set): Define.
* sysdeps/s390/bits/atomic.h (__arch_compare_and_exchange_val_8_acq):
Renamed from...
(__arch_compare_and_exchange_bool_8_acq): ... this.
(__arch_compare_and_exchange_val_16_acq): Renamed from...
(__arch_compare_and_exchange_bool_16_acq): ... this.
(__arch_compare_and_exchange_val_32_acq): Return old value. Renamed
from...
(__arch_compare_and_exchange_bool_32_acq): ... this.
(__arch_compare_and_exchange_val_64_acq): Return old value. Renamed
from...
(__arch_compare_and_exchange_bool_64_acq): ... this.
(__arch_compare_and_exchange_val_32_acq): Use __typeof for local
variables types instead of assuming int.
Change prefix of local variables to __arch.
* sysdeps/generic/bits/atomic.h (arch_compare_and_exchange_acq):
Remove.
(atomic_compare_and_exchange_val_acq,
atomic_compare_and_exchange_bool_acq): Define.
* csu/tst-atomic.c: New test.
* csu/tst-atomic-long.c: New test.
* csu/Makefile (tests): Add tst-atomic and tst-atomic-long.
* malloc/memusagestat.c (main): Kill warning if uint64_t is ulong.
* sysdeps/s390/Versions: Add trailing newline.
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Kill warning
if INTERNAL_SYSCALL_ERROR_P doesn't use its first argument.
Thu Aug 8 01:41:43 1996 Ulrich Drepper <drepper@cygnus.com>
* elf/Makefile: Undo change of Tue Aug 6 14:27:11 1996.
* elf/dl-support: Add definition of `_dl_sysdep_read_whole_file'.
Thu Aug 8 01:15:59 1996 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/fpu_control.h (_FPU_DEFAULT, _FPU_IEEE): Set
to 0x137f to allow long double operations.
Sun Aug 4 13:12:05 1996 Richard Henderson <rth@tamu.edu>
Bug Fixes:
* nss/nsswitch.c (_res): Remove redundant variable definition.
The real one is in resolve/res_init.c, and having both prevents
using -fno-common when building the shared library.
* sunrpc/rpc_prot.c (_null_auth): Same. Original is in rpc_common.c.
* sysdeps/unix/sysv/linux/alpha/brk.S: When PIC, define __curbrk as
a .bss object not a COMMON symbol.
* sysdeps/alpha/bsd-_setjmp.S, sysdeps/alpha/bsd-setjmp.S: Must load
$gp before referencing __sigsetjmp symbol. Retain LITUSE for same.
Optimizations:
* sysdeps/alpha/strlen.S: Rearrange first-word setup and thense the
main loop for better dual-issue on EV5. Rearrange binary search to
pipeline better and trim one instruction.
Cosmetic Changes:
* time/localtime.c (localtime_r): Move lock declaration back next to
the comment where it was before the 960724 change.
* INSTALL, manual/maint.texi: alpha-gnu-linux -> alpha-ANYTHING-linux.
The second word is supposed to be the hardware manufacturer.
* sysdeps/alpha/_mcount.S: Retain LITUSE for __mcount.
* sysdeps/alpha/setjmp.S: Retain LITUSE for __sigsetjmp_aux.
* sysdeps/alpha/divrem.h: More local labels, retain LITUSE for _mcount.
* sysdeps/alpha/alphaev5/add_n.S, sysdeps/alpha/alphaev5/lshift.S,
sysdeps/alpha/alphaev5/rshift.S, sysdeps/alpha/alphaev5/sub_n.S:
Same cleanups as with EV4 GMP stuff.
Tue Jul 25 03:30:56 1996 Richard Henderson <rth@tamu.edu>
* sysdeps/unix/sysv/linux/Makefile [misc] (sysdep_routines): Add clone.
* sysdeps/unix/sysv/linux/alpha/clone.S: New file.
* sysdeps/unix/sysv/linux/i386/clone.S: New file.
Sun Aug 4 00:12:41 1996 David Mosberger-Tang <davidm@azstarnet.com>
* sysdeps/unix/sysv/linux/gnu/types.h: Declare __fd_mask as
`unsigned long'.
* misc/sys/select.h: Declare fd_mask as alias of __fd_mask.
Sat Aug 3 16:20:02 1996 David Mosberger-Tang <davidm@azstarnet.com>
* sysdeps/unix/sysv/linux/alpha/ioperm.c (platform): Add entry for
Mikasa.
* socket/sys/socket.h (send, __send, sendto): Declare buffer
pointer as __const.
* string/tester.c (main): Test stpncpy.
* sysdeps/generic/stpncpy.c (__stpncpy): Fix so it works without
segfault when called with an N that is not a multiple of four and
src[N-1]=='\0'.
* misc/syslog.c (LogType): New variable.
(openlog): If connect() with SOCK_DGRAM fails with EPROTOTYPE,
try again with SOCK_STREAM (the Linux syslogd uses a socket of the
latter type).
(vsyslog): When LogType==SOCK_STREAM, also send ASCII NUL
terminator as a record-delimiter. If __send(LogFile) fails,
call closelog() so logfile gets re-opened next time.
Wed Aug 7 15:15:14 1996 Ulrich Drepper <drepper@cygnus.com>
* elf/dl-open (_dl_open): Add cast to avoid warning.
* manual/memory.texi: Improve some examples to give readers better
advice: Use `stpcpy' instead of `strcat' if possible.
* manual/string.texi: Document `strtok_r' and `strtok'.
* sunrpc/Makefile: Move `+gccwarn' definition before inclusion
of Makeconfig.
[$(cross-compiling)=no]: Change test before making librpcsvc
to this from $(cross-compile).
Reported by Andreas Schwab.
Tue Aug 6 14:27:11 1996 Ulrich Drepper <drepper@cygnus.com>
* elf/Makefile (routines): Move dl-sysdep to here...
(rtld-routines): ...from here. This should make static linking
work again.
* locale/setlocale.c: Add local variable `lock' and add code to
`setlocale' to avoid simultaneous changing of global data.
* catgets/catgets.c (catopen): Use `__strdup' instead of `strdup'.
* catgets/open_catalog (__open_catalog): Use `__stpcpy', `__open',
`__fstat', `__read', `__mmap', `__munmap' and `__close' instead
of unprotected names.
* time/strftime.c: Use canonical autoconf nugget for time.h+sys/time.h
include.
Mon Apr 29 02:48:26 1996 Ulrich Drepper <drepper@cygnus.com>
* ctype/ctype-info.c: (__ctype_width): New variable.
(__ctype_names): Initialize correctly without offset.
* locale/C-collate.c, locale/C-ctype.c,
locale/C-messages.c, locale/C-monetary.c,
locale/C-numeric.c, locale/C-time.c: Change copyright.
* locale/C-ctype.c (_nl_C_LC_CTYPE_class32): Correct
endianess for initialization value.
* locale/lc-ctype.c (current): Add parameter for offset.
(__ctype32_b, __ctype_width): Add initialization for these
variables.
* locale/programs/charmap.c: Finish support for WIDTH information.
(new_width): New function.
* locale/programs/charset.h (width_rule): new data structure.
(charset_t): Add elements for width information.
* locale/programs/ld-ctype.c (locale_ctype_t): Add element
for width information.
(allocate_arrays): Add new argument for charset.
(ctype_finish): Make sure all characters named in charset
width table are known to name table.
(ctype_output): Correct handling of class and map name
information and write out width information.
(find_idx): Prepare for being called with NULL pointer as
TABLE argument. This means only allocate name entry.
(allocate_arrays): Correct handling of array element -1.
Because EOF == -1 the value of element 127 must *not* be
mirrored here.
Fill width information from charset tables.
* locale/programs/localedef.c (main): Correct loop over all
categories after change of order from Thu Mar 28 14:22:51 1996.
Add new charset argument to call of `write_all_categories'.
* locale/programs/locales.h (ctype_finish, ctype_output): New
charset argument.
* locale/programs/locfile.c (write_all_categories): Call
`ctype_output' with additional argument charset.
* posix/getconf.c (vars): Add _POSIX_SYNC_IO, _POSIX_ASYNC_IO,
and _POSIX_PRIO_IO definitions.
* posix/posix2_lim.h: Add definition of _POSIX2_CHARCLASS_NAME_MAX
and CHARCLASS_NAME_MAX.
* posix/unistd.h: Document _POSIX_SYNC_IO, _POSIX_ASYNC_IO,
and _POSIX_PRIO_IO.
* stdlib/grouping.h: Prepare for use in wide string functions.
* stdlib/stdlib.h: Correct prototypes for __strto*_internal
functions.
* stdlib/strtod.c: Extend for use as `wcsto{f,d,ld}'.
* stdlib/strtol.c: Extend for use as `wcsto{l,ul,q,uq}'.
* string/strcoll.c: Extend for use as `wcscoll'.
* string/strxfrm.c: Extend for use as `wcsxfrm'.
* sysdeps/generic/confname.h: Add definition of _PC_SYNC_IO,
_PC_ASYNC_IO, _PC_PRIO_IO and _SC_CHARCLASS_NAME_MAX.
* sysdeps/generic/stpncpy.c: Correct return value.
* sysdeps/posix/fpathconf.c: Add handling of _PC_SYNC_IO,
_PC_ASYNC_IO, and _PC_PRIO_IO.
* sysdeps/posix/sysconf.c: Add handling of _SC_REALTIME_SIGNALS,
_SC_PRIORITY_SCHEDULING, _SC_TIMERS, _SC_ASYNCHRONOUS_IO,
_SC_PRIORITIZED_IO, _SC_SYNCHRONIZED_IO, _SC_FSYNC,
_SC_MAPPED_FILES, _SC_MEMLOCK, _SC_MEMLOCK_RANGE,
_SC_MEMORY_PROTECTION, _SC_MESSAGE_PASSING, _SC_SEMAPHORES,
_SC_SHARED_MEMORY_OBJECTS, and _SC_CHARCLASS_NAME_MAX.
* sysdeps/stub/sysconf.c: Ditto.
* sysdeps/unix/sysv/sysv4/sysconf.c: Ditto.
* sysdeps/unix/sysv/linux/Dist: Add sys/sysctl.h.
* sysdeps/unix/sysv/linux/Makefile [subdir == misc]
(sysdep_routines): Add s_sysctl and sysctl.
* sysdeps/unix/sysv/linux/sys/mman.h: Add declaration of mremap.
* sysdeps/unix/sysv/linux/sys/socket.h: New file. Wrapper
around kernel header.
* sysdeps/unix/sysv/linux/sys/sysctl.h: New file. Define
interface to `sysctl' function.
* sysdeps/unix/sysv/linux/syscalls.list: Add mremap and _sysctl.
* sysdeps/unix/sysv/linux/sysconf.c: Add handling of
_SC_CHARCLASS_NAME_MAX.
* sysdeps/unix/sysv/linux/sysctl.c: new file. Implement caller
of _sysctl system call.
* sysvipc/Makefile (routines): Add ftok.
* sysvipc/ftok.c: use variable `proj_id' not `id'. Patch by
David Mosberger-Tang.
* wcsmbs/Makefile (routines): Add wcpcpy, wcpncpy, wcstol,
wcstoul, wcstoq, wcstouq, wcstod, wcstold, wcstof, wcscoll,
wcsxfrm, wcwidth, and wcswidth.
* wcsmbs/wchar.h: Add declarations for wcpcpy, wcpncpy, wcstol,
wcstoul, wcstoq, wcstouq, wcstod, wcstold, wcstof, wcscoll,
wcsxfrm, wcwidth, and wcswidth.
Declare internal interfaces for wcsto* functions.
[OPTIMIZE]: Define inline functions for wcsto* functions to
call internal interface functions.
* wcsmbs/wcpcpy.c, wcsmbs/wcpncpy.c: New files. Implement non-
standard function equivalent to stpcpy/stpncpy.
* wcsmbs/wcscoll.c: Implement `wcscoll' function by using
`strcoll' implementation.
* wcsmbs/wcscpy.c, wcsmbs/wcsncpy.c: Use wint_t instead of
wchar_t.
* wcsmbs/wcstod.c: Implement `wcstod' function by using `strtod'
implementation.
* wcsmbs/wcstof.c: Same for `wcstof'.
* wcsmbs/wcstold.c: Same for `strtold'.
* wcsmbs/wcstol.c: Implement `wcstol' function by using `strtol'
implementation.
* wcsmbs/wcstoq.c: Same for `wcstoq'.
* wcsmbs/wcstoul.c: Same for `wcstoul'.
* wcsmbs/wcstouq.c: Same for `wcstouq'.
* wcsmbs/wcswidth.c: Implement `wcswidth' function from X/Open
CAE.
* wcsmbs/wcwidth.c: Ditto for `wcwidth'.
* wcsmbs/wcwidth.h: Common function for definitions of above two
functions.
* wcsmbs/wcsxfrm.c: Implement `wcsxfrm function by using
`strxfrm implementation.
* wctype/wctype.c: Remove case for `wctype_t' being 16 bit type.
* wctype/wctype.h (wint_t): Protect against multiple definition.
(wctype_t): Always define as `unsigned long int'.
* wctype.h: New file. Wrapper around wctype/wctype.h.
* hurd/hurdstartup.c (_hurd_split_args): Function removed.
(_hurd_startup): Use argz functions.
* hurd/hurdexec.c: Use argz functions.
* sysdeps/posix/utimes.c (__utimes): There are 1000000 usecs in a
sec.
Sun Feb 18 13:56:00 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* elf/Makefile, time/Makefile: Make `all' the default target.
Mon Feb 19 18:09:04 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* misc/sys/ptrace.h: Moved to ...
* sysdeps/generic/sys/ptrace.h: ... here.
* sys/ptrace.h: File removed.
Sun Feb 18 12:13:07 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* sysdeps/unix/sysv/linux/Makefile (headers): Add fpu_control.h.
* sysdeps/unix/sysv/linux/i386/sysdep.S (errno): Put it into .bss
so that the symbol alias works.
* sysdeps/unix/sysv/linux/m68k/fpu_control.h (_FPU_SETCW): Corrected.
* sysdeps/unix/sysv/linux/resourcebits.h: New file.
* sysdeps/unix/sysv/linux/sys/ptrace.h: New file.
* sysdeps/unix/sysv/linux/syscalls.list: Add getegid, geteuid,
getppid and reboot.
* sysdeps/unix/sysv/linux/sysconf.c: Special version that does not
use getdtablesize.
Sat Feb 17 10:30:21 1996 David Mosberger-Tang <davidm@AZStarNet.com>
* stdio-common/printf_fp.c, stdlib/strtod.c, sysdeps/ieee754/dbl2mpn.c,
sysdeps/ieee754/ldbl2mpn.c, sysdeps/ieee754/mpn2dbl.c,
sysdeps/ieee754/mpn2ldbl.c: Cast left operands of shift instructions
to `long' where necessary.
Thu Feb 15 20:04:50 1996 Ulrich Drepper <drepper@gnu.ai.mit.edu>
* stdlib/fpioconst.h: Introduce new constant _FPIO_CONST_OFFSET.
* stdio-common/printf_fp.c, stdlib/strtod.c: Use _FPIO_CONST_OFFSET
to correctly access MPN array depending on architecture.
