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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 1987 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI" /* from S5R2 1.2 */
/*LINTLIBRARY*/
/*
* ssignal, gsignal: software signals
*/
#include <signal.h>
/* Highest allowable user signal number */
#define MAXSIG NSIG
/* Lowest allowable signal number (lowest user number is always 1) */
#define MINSIG (-4)
/* Table of signal values */
typedef int (*sigfunc)();
sigfunc *ssigp;
sigfunc *
_ssig()
{
if (ssigp == 0)
ssigp = (sigfunc *)calloc(MAXSIG-MINSIG+1, sizeof (sigfunc));
return (ssigp);
}
int
(*ssignal(sig, fn))()
register int sig, (*fn)();
{
register int (*savefn)();
register sigfunc *sp = _ssig();
if (sp == 0)
return ((int (*)())SIG_DFL);
if (sig >= MINSIG && sig <= MAXSIG) {
savefn = sp[sig-MINSIG];
sp[sig-MINSIG] = fn;
} else
savefn = (int (*)())SIG_DFL;
return (savefn);
}
int
gsignal(sig)
register int sig;
{
register int (*sigfn)();
register sigfunc *sp = _ssig();
if (sp == 0)
return (0);
if (sig < MINSIG || sig > MAXSIG ||
(sigfn = sp[sig-MINSIG]) == (int (*)())SIG_DFL)
return (0);
else if (sigfn == (int (*)())SIG_IGN)
return (1);
else {
sp[sig-MINSIG] = (int (*)())SIG_DFL;
return ((*sigfn)(sig));
}
}
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