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 */
45 void
catch_signals()46 catch_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 */
101 void
child_sigcatch()102 child_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