/*
 * 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 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

#include        <stdio.h>
#include        <signal.h>
#include        "tmextern.h"

/*
 * catch_signals:
 *      ttymon catch some signals and ignore the rest.
 *
 *      SIGTERM - killed by somebody
 *      SIGPOLL - got message on pmpipe, probably from sac
 *                         or on PCpipe
 *      SIGCLD  - tmchild died
 */
void
catch_signals(void)
{
        sigset_t cset;
        struct sigaction sigact;

#ifdef  DEBUG
        debug("in catch_signals");
#endif

        cset = Origmask;
        (void) sigdelset(&cset, SIGTERM);
        (void) sigdelset(&cset, SIGCLD);
        (void) sigdelset(&cset, SIGPOLL);
#ifdef  DEBUG
        (void) sigdelset(&cset, SIGUSR1);
        (void) sigdelset(&cset, SIGUSR2);
#endif
        (void) sigprocmask(SIG_SETMASK, &cset, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = sigterm;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGTERM);
        (void) sigaction(SIGTERM, &sigact, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = sigchild;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaction(SIGCLD, &sigact, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = sigpoll_catch;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGPOLL);
        (void) sigaction(SIGPOLL, &sigact, NULL);
#ifdef  DEBUG
        sigact.sa_flags = 0;
        sigact.sa_handler = dump_pmtab;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGUSR1);
        (void) sigaction(SIGUSR1, &sigact, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = dump_ttydefs;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGUSR2);
        (void) sigaction(SIGUSR2, &sigact, NULL);
#endif
}

/*
 * child_sigcatch() - tmchild inherits some signal_catch from parent
 *                    and need to reset them
 */
void
child_sigcatch(void)
{
        struct  sigaction       sigact;
        sigset_t cset;

        cset = Origmask;
        (void) sigdelset(&cset, SIGINT);
        (void) sigdelset(&cset, SIGPOLL);
        (void) sigprocmask(SIG_SETMASK, &cset, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = sigpoll;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGPOLL);
        (void) sigaction(SIGPOLL, &sigact, NULL);
        sigact.sa_flags = 0;
        sigact.sa_handler = sigint;
        (void) sigemptyset(&sigact.sa_mask);
        (void) sigaddset(&sigact.sa_mask, SIGINT);
        (void) sigaction(SIGINT, &sigact, NULL);
}