mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-11 07:40:05 +00:00
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Copyright (C) 1991, 1992 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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
|
|
|
|
sigset_t _sigintr; /* Set by siginterrupt. */
|
|
|
|
/* Set the handler for the signal SIG to HANDLER,
|
|
returning the old handler, or SIG_ERR on error. */
|
|
__sighandler_t
|
|
DEFUN(signal, (sig, handler), int sig AND __sighandler_t handler)
|
|
{
|
|
struct sigaction act, oact;
|
|
|
|
if (handler == SIG_ERR)
|
|
{
|
|
errno = EINVAL;
|
|
return SIG_ERR;
|
|
}
|
|
|
|
act.sa_handler = handler;
|
|
if (__sigemptyset (&act.sa_mask) < 0)
|
|
return SIG_ERR;
|
|
act.sa_flags = __sigismember (&_sigintr, sig) ? 0 : SA_RESTART;
|
|
if (__sigaction (sig, &act, &oact) < 0)
|
|
return SIG_ERR;
|
|
|
|
return oact.sa_handler;
|
|
}
|