setsig.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
23/*	  All Rights Reserved  	*/
24
25
26#pragma ident	"%Z%%M%	%I%	%E% SMI" 	/* SVr4.0 2.	*/
27#include "mail.h"
28/*
29	Signal reset
30	signals that are not being ignored will be
31	caught by function f
32		i	-> signal number
33		f	-> signal routine
34	return
35		rc	-> former signal
36 */
37void (*setsig(i, f))()
38int      i;
39void      (*f)();
40{
41	register void (*rc)();
42
43	if ((rc = signal(i, SIG_IGN)) != (void (*)()) SIG_IGN)
44		signal(i, f);
45	return(rc);
46}
47