1 /* Id */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
5 * Copyright (c) 2010 Romain Francoise <rfrancoise@debian.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20 #include <string.h>
21 #include <signal.h>
22
23 #include "tmux.h"
24
25 struct event ev_sighup;
26 struct event ev_sigchld;
27 struct event ev_sigcont;
28 struct event ev_sigterm;
29 struct event ev_sigusr1;
30 struct event ev_sigwinch;
31
32 void
set_signals(void (* handler)(int,short,unused void *))33 set_signals(void(*handler)(int, short, unused void *))
34 {
35 struct sigaction sigact;
36
37 memset(&sigact, 0, sizeof sigact);
38 sigemptyset(&sigact.sa_mask);
39 sigact.sa_flags = SA_RESTART;
40 sigact.sa_handler = SIG_IGN;
41 if (sigaction(SIGINT, &sigact, NULL) != 0)
42 fatal("sigaction failed");
43 if (sigaction(SIGPIPE, &sigact, NULL) != 0)
44 fatal("sigaction failed");
45 if (sigaction(SIGUSR2, &sigact, NULL) != 0)
46 fatal("sigaction failed");
47 if (sigaction(SIGTSTP, &sigact, NULL) != 0)
48 fatal("sigaction failed");
49
50 signal_set(&ev_sighup, SIGHUP, handler, NULL);
51 signal_add(&ev_sighup, NULL);
52 signal_set(&ev_sigchld, SIGCHLD, handler, NULL);
53 signal_add(&ev_sigchld, NULL);
54 signal_set(&ev_sigcont, SIGCONT, handler, NULL);
55 signal_add(&ev_sigcont, NULL);
56 signal_set(&ev_sigterm, SIGTERM, handler, NULL);
57 signal_add(&ev_sigterm, NULL);
58 signal_set(&ev_sigusr1, SIGUSR1, handler, NULL);
59 signal_add(&ev_sigusr1, NULL);
60 signal_set(&ev_sigwinch, SIGWINCH, handler, NULL);
61 signal_add(&ev_sigwinch, NULL);
62 }
63
64 void
clear_signals(int after_fork)65 clear_signals(int after_fork)
66 {
67 struct sigaction sigact;
68
69 memset(&sigact, 0, sizeof sigact);
70 sigemptyset(&sigact.sa_mask);
71 sigact.sa_flags = SA_RESTART;
72 sigact.sa_handler = SIG_DFL;
73 if (sigaction(SIGINT, &sigact, NULL) != 0)
74 fatal("sigaction failed");
75 if (sigaction(SIGPIPE, &sigact, NULL) != 0)
76 fatal("sigaction failed");
77 if (sigaction(SIGUSR2, &sigact, NULL) != 0)
78 fatal("sigaction failed");
79 if (sigaction(SIGTSTP, &sigact, NULL) != 0)
80 fatal("sigaction failed");
81
82 if (after_fork) {
83 if (sigaction(SIGHUP, &sigact, NULL) != 0)
84 fatal("sigaction failed");
85 if (sigaction(SIGCHLD, &sigact, NULL) != 0)
86 fatal("sigaction failed");
87 if (sigaction(SIGCONT, &sigact, NULL) != 0)
88 fatal("sigaction failed");
89 if (sigaction(SIGTERM, &sigact, NULL) != 0)
90 fatal("sigaction failed");
91 if (sigaction(SIGUSR1, &sigact, NULL) != 0)
92 fatal("sigaction failed");
93 if (sigaction(SIGWINCH, &sigact, NULL) != 0)
94 fatal("sigaction failed");
95 } else {
96 event_del(&ev_sighup);
97 event_del(&ev_sigchld);
98 event_del(&ev_sigcont);
99 event_del(&ev_sigterm);
100 event_del(&ev_sigusr1);
101 event_del(&ev_sigwinch);
102 }
103 }
104