1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
27*0Sstevel@tonic-gate /* All Rights Reserved */
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate
30*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
31*0Sstevel@tonic-gate
32*0Sstevel@tonic-gate #include <stdio.h>
33*0Sstevel@tonic-gate #include <signal.h>
34*0Sstevel@tonic-gate #include "tmextern.h"
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate /*
37*0Sstevel@tonic-gate * catch_signals:
38*0Sstevel@tonic-gate * ttymon catch some signals and ignore the rest.
39*0Sstevel@tonic-gate *
40*0Sstevel@tonic-gate * SIGTERM - killed by somebody
41*0Sstevel@tonic-gate * SIGPOLL - got message on pmpipe, probably from sac
42*0Sstevel@tonic-gate * or on PCpipe
43*0Sstevel@tonic-gate * SIGCLD - tmchild died
44*0Sstevel@tonic-gate */
45*0Sstevel@tonic-gate void
catch_signals()46*0Sstevel@tonic-gate catch_signals()
47*0Sstevel@tonic-gate {
48*0Sstevel@tonic-gate sigset_t cset;
49*0Sstevel@tonic-gate struct sigaction sigact;
50*0Sstevel@tonic-gate extern void sigterm();
51*0Sstevel@tonic-gate extern void sigchild();
52*0Sstevel@tonic-gate extern void sigpoll_catch();
53*0Sstevel@tonic-gate #ifdef DEBUG
54*0Sstevel@tonic-gate extern void dump_pmtab();
55*0Sstevel@tonic-gate extern void dump_ttydefs();
56*0Sstevel@tonic-gate
57*0Sstevel@tonic-gate debug("in catch_signals");
58*0Sstevel@tonic-gate #endif
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate cset = Origmask;
61*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGTERM);
62*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGCLD);
63*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGPOLL);
64*0Sstevel@tonic-gate #ifdef DEBUG
65*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGUSR1);
66*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGUSR2);
67*0Sstevel@tonic-gate #endif
68*0Sstevel@tonic-gate (void)sigprocmask(SIG_SETMASK, &cset, NULL);
69*0Sstevel@tonic-gate sigact.sa_flags = 0;
70*0Sstevel@tonic-gate sigact.sa_handler = sigterm;
71*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
72*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGTERM);
73*0Sstevel@tonic-gate (void)sigaction(SIGTERM, &sigact, NULL);
74*0Sstevel@tonic-gate sigact.sa_flags = 0;
75*0Sstevel@tonic-gate sigact.sa_handler = sigchild;
76*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
77*0Sstevel@tonic-gate (void)sigaction(SIGCLD, &sigact, NULL);
78*0Sstevel@tonic-gate sigact.sa_flags = 0;
79*0Sstevel@tonic-gate sigact.sa_handler = sigpoll_catch;
80*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
81*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGPOLL);
82*0Sstevel@tonic-gate (void)sigaction(SIGPOLL, &sigact, NULL);
83*0Sstevel@tonic-gate #ifdef DEBUG
84*0Sstevel@tonic-gate sigact.sa_flags = 0;
85*0Sstevel@tonic-gate sigact.sa_handler = dump_pmtab;
86*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
87*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGUSR1);
88*0Sstevel@tonic-gate (void)sigaction(SIGUSR1, &sigact, NULL);
89*0Sstevel@tonic-gate sigact.sa_flags = 0;
90*0Sstevel@tonic-gate sigact.sa_handler = dump_ttydefs;
91*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
92*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGUSR2);
93*0Sstevel@tonic-gate (void)sigaction(SIGUSR2, &sigact, NULL);
94*0Sstevel@tonic-gate #endif
95*0Sstevel@tonic-gate }
96*0Sstevel@tonic-gate
97*0Sstevel@tonic-gate /*
98*0Sstevel@tonic-gate * child_sigcatch() - tmchild inherits some signal_catch from parent
99*0Sstevel@tonic-gate * and need to reset them
100*0Sstevel@tonic-gate */
101*0Sstevel@tonic-gate void
child_sigcatch()102*0Sstevel@tonic-gate child_sigcatch()
103*0Sstevel@tonic-gate {
104*0Sstevel@tonic-gate struct sigaction sigact;
105*0Sstevel@tonic-gate sigset_t cset;
106*0Sstevel@tonic-gate extern void sigpoll();
107*0Sstevel@tonic-gate extern void sigint();
108*0Sstevel@tonic-gate
109*0Sstevel@tonic-gate cset = Origmask;
110*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGINT);
111*0Sstevel@tonic-gate (void)sigdelset(&cset, SIGPOLL);
112*0Sstevel@tonic-gate (void)sigprocmask(SIG_SETMASK, &cset, NULL);
113*0Sstevel@tonic-gate sigact.sa_flags = 0;
114*0Sstevel@tonic-gate sigact.sa_handler = sigpoll;
115*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
116*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGPOLL);
117*0Sstevel@tonic-gate (void)sigaction(SIGPOLL, &sigact, NULL);
118*0Sstevel@tonic-gate sigact.sa_flags = 0;
119*0Sstevel@tonic-gate sigact.sa_handler = sigint;
120*0Sstevel@tonic-gate (void)sigemptyset(&sigact.sa_mask);
121*0Sstevel@tonic-gate (void)sigaddset(&sigact.sa_mask, SIGINT);
122*0Sstevel@tonic-gate (void)sigaction(SIGINT, &sigact, NULL);
123*0Sstevel@tonic-gate }
124