58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 1992, 1994, 1996 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; /* 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
|
|
}
|