/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#pragma weak _bsd_signal = bsd_signal
#include "lint.h"
#include <sys/types.h>
#include <errno.h>
#include <signal.h>
#include <wait.h>
/*
* Check for valid signal number
*/
#define CHECK_SIG(s, code) \
if ((s) <= 0 || (s) >= NSIG || (s) == SIGKILL || (s) == SIGSTOP) { \
errno = EINVAL; \
return (code); \
}
void (*
bsd_signal(int sig, void(*func)(int)))(int)
{
struct sigaction nact;
struct sigaction oact;
CHECK_SIG(sig, SIG_ERR);
nact.sa_handler = func;
nact.sa_flags = SA_RESTART;
(void) sigemptyset(&nact.sa_mask);
(void) sigaddset(&nact.sa_mask, sig);
if (sigaction(sig, &nact, &oact) == -1)
return (SIG_ERR);
return (oact.sa_handler);
}