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/*
23 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26/*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
27/*	  All Rights Reserved  	*/
28
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include	<stdio.h>
33#include	<signal.h>
34#include	"tmextern.h"
35
36/*
37 * catch_signals:
38 *	ttymon catch some signals and ignore the rest.
39 *
40 *	SIGTERM	- killed by somebody
41 *	SIGPOLL - got message on pmpipe, probably from sac
42 *			   or on PCpipe
43 *	SIGCLD	- tmchild died
44 */
45void
46catch_signals()
47{
48	sigset_t cset;
49	struct sigaction sigact;
50	extern void sigterm();
51	extern void sigchild();
52	extern void sigpoll_catch();
53#ifdef	DEBUG
54	extern void dump_pmtab();
55	extern void dump_ttydefs();
56
57	debug("in catch_signals");
58#endif
59
60	cset = Origmask;
61	(void)sigdelset(&cset, SIGTERM);
62	(void)sigdelset(&cset, SIGCLD);
63	(void)sigdelset(&cset, SIGPOLL);
64#ifdef	DEBUG
65	(void)sigdelset(&cset, SIGUSR1);
66	(void)sigdelset(&cset, SIGUSR2);
67#endif
68	(void)sigprocmask(SIG_SETMASK, &cset, NULL);
69	sigact.sa_flags = 0;
70	sigact.sa_handler = sigterm;
71	(void)sigemptyset(&sigact.sa_mask);
72	(void)sigaddset(&sigact.sa_mask, SIGTERM);
73	(void)sigaction(SIGTERM, &sigact, NULL);
74	sigact.sa_flags = 0;
75	sigact.sa_handler = sigchild;
76	(void)sigemptyset(&sigact.sa_mask);
77	(void)sigaction(SIGCLD, &sigact, NULL);
78	sigact.sa_flags = 0;
79	sigact.sa_handler = sigpoll_catch;
80	(void)sigemptyset(&sigact.sa_mask);
81	(void)sigaddset(&sigact.sa_mask, SIGPOLL);
82	(void)sigaction(SIGPOLL, &sigact, NULL);
83#ifdef	DEBUG
84	sigact.sa_flags = 0;
85	sigact.sa_handler = dump_pmtab;
86	(void)sigemptyset(&sigact.sa_mask);
87	(void)sigaddset(&sigact.sa_mask, SIGUSR1);
88	(void)sigaction(SIGUSR1, &sigact, NULL);
89	sigact.sa_flags = 0;
90	sigact.sa_handler = dump_ttydefs;
91	(void)sigemptyset(&sigact.sa_mask);
92	(void)sigaddset(&sigact.sa_mask, SIGUSR2);
93	(void)sigaction(SIGUSR2, &sigact, NULL);
94#endif
95}
96
97/*
98 * child_sigcatch() - tmchild inherits some signal_catch from parent
99 *		      and need to reset them
100 */
101void
102child_sigcatch()
103{
104	struct	sigaction	sigact;
105	sigset_t cset;
106	extern	void	sigpoll();
107	extern	void	sigint();
108
109	cset = Origmask;
110	(void)sigdelset(&cset, SIGINT);
111	(void)sigdelset(&cset, SIGPOLL);
112	(void)sigprocmask(SIG_SETMASK, &cset, NULL);
113	sigact.sa_flags = 0;
114	sigact.sa_handler = sigpoll;
115	(void)sigemptyset(&sigact.sa_mask);
116	(void)sigaddset(&sigact.sa_mask, SIGPOLL);
117	(void)sigaction(SIGPOLL, &sigact, NULL);
118	sigact.sa_flags = 0;
119	sigact.sa_handler = sigint;
120	(void)sigemptyset(&sigact.sa_mask);
121	(void)sigaddset(&sigact.sa_mask, SIGINT);
122	(void)sigaction(SIGINT, &sigact, NULL);
123}
124