10Sstevel@tonic-gate /*
20Sstevel@tonic-gate * CDDL HEADER START
30Sstevel@tonic-gate *
40Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*6812Sraf * Common Development and Distribution License (the "License").
6*6812Sraf * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate *
80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate * See the License for the specific language governing permissions
110Sstevel@tonic-gate * and limitations under the License.
120Sstevel@tonic-gate *
130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate *
190Sstevel@tonic-gate * CDDL HEADER END
200Sstevel@tonic-gate */
21*6812Sraf
220Sstevel@tonic-gate /*
23*6812Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
240Sstevel@tonic-gate * Use is subject to license terms.
250Sstevel@tonic-gate */
260Sstevel@tonic-gate
270Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
280Sstevel@tonic-gate /* All Rights Reserved */
290Sstevel@tonic-gate
30*6812Sraf #pragma ident "%Z%%M% %I% %E% SMI"
310Sstevel@tonic-gate
320Sstevel@tonic-gate /*
330Sstevel@tonic-gate * ssignal, gsignal: software signals
340Sstevel@tonic-gate */
350Sstevel@tonic-gate
36*6812Sraf #include "lint.h"
370Sstevel@tonic-gate #include <sys/types.h>
380Sstevel@tonic-gate #include <signal.h>
390Sstevel@tonic-gate
400Sstevel@tonic-gate /* Highest allowable user signal number */
410Sstevel@tonic-gate #define MAXSIGNUM 17
420Sstevel@tonic-gate
430Sstevel@tonic-gate /* Lowest allowable signal number (lowest user number is always 1) */
440Sstevel@tonic-gate #define MINSIG (-4)
450Sstevel@tonic-gate
460Sstevel@tonic-gate /* Table of signal values */
470Sstevel@tonic-gate static int (*sigs[MAXSIGNUM-MINSIG+1])(int);
480Sstevel@tonic-gate
490Sstevel@tonic-gate int (*
ssignal(int sig,int (* action)(int))500Sstevel@tonic-gate ssignal(int sig, int (*action)(int)))(int)
510Sstevel@tonic-gate {
520Sstevel@tonic-gate int (*savefn)(int);
530Sstevel@tonic-gate
540Sstevel@tonic-gate if (sig >= MINSIG && sig <= MAXSIGNUM) {
550Sstevel@tonic-gate savefn = sigs[sig-MINSIG];
560Sstevel@tonic-gate sigs[sig-MINSIG] = action;
570Sstevel@tonic-gate } else
580Sstevel@tonic-gate savefn = (int(*)(int))SIG_DFL;
590Sstevel@tonic-gate
600Sstevel@tonic-gate return (savefn);
610Sstevel@tonic-gate }
620Sstevel@tonic-gate
630Sstevel@tonic-gate int
gsignal(int sig)640Sstevel@tonic-gate gsignal(int sig)
650Sstevel@tonic-gate {
660Sstevel@tonic-gate int (*sigfn)(int);
670Sstevel@tonic-gate
680Sstevel@tonic-gate if (sig < MINSIG || sig > MAXSIGNUM ||
690Sstevel@tonic-gate (sigfn = sigs[sig-MINSIG]) == (int(*)(int))SIG_DFL)
700Sstevel@tonic-gate return (0);
710Sstevel@tonic-gate else if (sigfn == (int(*)(int))SIG_IGN)
720Sstevel@tonic-gate return (1);
730Sstevel@tonic-gate else {
740Sstevel@tonic-gate sigs[sig-MINSIG] = (int(*)(int))SIG_DFL;
750Sstevel@tonic-gate return ((*sigfn)(sig));
760Sstevel@tonic-gate }
770Sstevel@tonic-gate }
78