glibc/sysdeps/posix/sigintr.c
Ulrich Drepper 1897bc3f93 Update.
* sysdeps/gnu/errlist.awk: Define _sys_errlist_internal and
	_sys_nerr_internal with INTVARDEF2.
	* include/libc-symbols.h (INTVARDEF2): New macro.
	* include/stdio.h (_sys_errlist_internal): Declare as hidden.
	(_sys_nerr_internal): Library.

	* sysdeps/posix/signal.c (_sigintr): Define as hidden.
	* sysdeps/posix/sigintr.c (_sigintr): Declare as hidden.
2002-03-14 00:57:10 +00:00

58 lines
1.7 KiB
C

/* Copyright (C) 1992, 1994, 1996, 2002 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stddef.h>
#include <signal.h>
#include <errno.h>
/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
(causing them to fail with EINTR); if INTERRUPT is zero, make system
calls be restarted after signal SIG. */
int
siginterrupt (sig, interrupt)
int sig;
int interrupt;
{
#ifdef SA_RESTART
extern sigset_t _sigintr attribute_hidden; /* Defined in signal.c. */
struct sigaction action;
if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
return -1;
if (interrupt)
{
__sigaddset (&_sigintr, sig);
action.sa_flags &= ~SA_RESTART;
}
else
{
__sigdelset (&_sigintr, sig);
action.sa_flags |= SA_RESTART;
}
if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
return -1;
return 0;
#else
__set_errno (ENOSYS);
return -1;
#endif
}