mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
7804eb37e8
1999-01-26 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/sigaction.c: Update comment to say the __libc_missing_rt_sigs is defined here. * sysdeps/unix/sysv/linux/sigpending.c: Only declare __libc_missing_rt_sigs. * sysdeps/unix/sysv/linux/sigprocmask.c: Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c: Likewise.
61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
/* Copyright (C) 1996, 1997, 1998, 1999 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sysdep.h>
|
|
#include <sys/syscall.h>
|
|
|
|
extern int __syscall_sigsuspend (int, unsigned long int, unsigned long int);
|
|
extern int __syscall_rt_sigsuspend (const sigset_t *, size_t);
|
|
|
|
|
|
/* The variable is shared between all wrappers around signal handling
|
|
functions which have RT equivalents. The definition is in sigaction.c. */
|
|
extern int __libc_missing_rt_sigs;
|
|
|
|
|
|
/* Change the set of blocked signals to SET,
|
|
wait until a signal arrives, and restore the set of blocked signals. */
|
|
int
|
|
__sigsuspend (set)
|
|
const sigset_t *set;
|
|
{
|
|
#ifdef __NR_rt_sigsuspend
|
|
/* First try the RT signals. */
|
|
if (!__libc_missing_rt_sigs)
|
|
{
|
|
/* XXX The size argument hopefully will have to be changed to the
|
|
real size of the user-level sigset_t. */
|
|
int saved_errno = errno;
|
|
int result = INLINE_SYSCALL (rt_sigsuspend, 2, set, _NSIG / 8);
|
|
|
|
if (result >= 0 || errno != ENOSYS)
|
|
return result;
|
|
|
|
__set_errno (saved_errno);
|
|
__libc_missing_rt_sigs = 1;
|
|
}
|
|
#endif
|
|
|
|
return INLINE_SYSCALL (sigsuspend, 3, 0, 0, set->__val[0]);
|
|
}
|
|
weak_alias (__sigsuspend, sigsuspend)
|