root/usr/src/cmd/mail/setsig.c
/*
 * 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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

#include "mail.h"
/*
        Signal reset
        signals that are not being ignored will be
        caught by function f
                i       -> signal number
                f       -> signal routine
        return
                rc      -> former signal
 */
void (*setsig(i, f))()
int      i;
void      (*f)();
{
        register void (*rc)();

        if ((rc = signal(i, SIG_IGN)) != (void (*)()) SIG_IGN)
                signal(i, f);
        return(rc);
}