mirror of
https://sourceware.org/git/glibc.git
synced 2025-05-31 15:01:17 +03:00
5fb7fc9635
This patch uses posix_spawn on system implementation. On Linux this has the advantage of much lower memory consumption (usually 32 Kb minimum for the mmap stack area). Although POSIX does not require, glibc system implementation aims to be thread and cancellation safe. The cancellation code is moved to generic implementation and enabled iff SIGCANCEL is defined (similar on how the cancellation handler is enabled on nptl-init.c). Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, arm-linux-gnueabihf, and powerpc64le-linux-gnu. * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Use __sigismember instead of sigismember. * sysdeps/posix/system.c [SIGCANCEL] (cancel_handler_args, cancel_handler): New definitions. (CLEANUP_HANDLER, CLEANUP_RESET): Likewise. (DO_LOCK, DO_UNLOCK, INIT_LOCK, ADD_REF, SUB_REF): Remove. (do_system): Use posix_spawn instead of fork and execl and remove reentracy code. * sysdeps/generic/not-errno.h (__kill_noerrno): New prototype. * sysdeps/unix/sysv/linux/not-errno.h (__kill_noerrno): Likewise. * sysdeps/unix/sysv/linux/ia64/system.c: Remove file. * sysdeps/unix/sysv/linux/s390/system.c: Likewise. * sysdeps/unix/sysv/linux/sparc/system.c: Likewise. * sysdeps/unix/sysv/linux/system.c: Likewise.
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Syscall wrapper that do not set errno. Linux version.
|
|
Copyright (C) 2017-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <fcntl.h>
|
|
|
|
/* This function is used on maybe_enable_malloc_check (elf/dl-tunables.c)
|
|
and to avoid having to build/use multiple versions if stack protection
|
|
in enabled it is defined as inline. */
|
|
static inline int
|
|
__access_noerrno (const char *pathname, int mode)
|
|
{
|
|
int res;
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
#ifdef __NR_access
|
|
res = INTERNAL_SYSCALL_CALL (access, err, pathname, mode);
|
|
#else
|
|
res = INTERNAL_SYSCALL_CALL (faccessat, err, AT_FDCWD, pathname, mode);
|
|
#endif
|
|
if (INTERNAL_SYSCALL_ERROR_P (res, err))
|
|
return INTERNAL_SYSCALL_ERRNO (res, err);
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
__kill_noerrno (pid_t pid, int sig)
|
|
{
|
|
int res;
|
|
INTERNAL_SYSCALL_DECL (err);
|
|
res = INTERNAL_SYSCALL_CALL (kill, err, pid, sig);
|
|
if (INTERNAL_SYSCALL_ERROR_P (res, err))
|
|
return INTERNAL_SYSCALL_ERRNO (res, err);
|
|
return 0;
|
|
}
|