/*
* 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.
*/
/* Copyright (c) 1988 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* ssignal, gsignal: software signals
*/
#include "lint.h"
#include <sys/types.h>
#include <signal.h>
/* Highest allowable user signal number */
#define MAXSIGNUM 17
/* Lowest allowable signal number (lowest user number is always 1) */
#define MINSIG (-4)
/* Table of signal values */
static int (*sigs[MAXSIGNUM-MINSIG+1])(int);
int (*
ssignal(int sig, int (*action)(int)))(int)
{
int (*savefn)(int);
if (sig >= MINSIG && sig <= MAXSIGNUM) {
savefn = sigs[sig-MINSIG];
sigs[sig-MINSIG] = action;
} else
savefn = (int(*)(int))SIG_DFL;
return (savefn);
}
int
gsignal(int sig)
{
int (*sigfn)(int);
if (sig < MINSIG || sig > MAXSIGNUM ||
(sigfn = sigs[sig-MINSIG]) == (int(*)(int))SIG_DFL)
return (0);
else if (sigfn == (int(*)(int))SIG_IGN)
return (1);
else {
sigs[sig-MINSIG] = (int(*)(int))SIG_DFL;
return ((*sigfn)(sig));
}
}