Annotation of embedaddon/tmux/signal.c, revision 1.1.1.1
1.1 misho 1: /* $OpenBSD$ */
2:
3: /*
4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 <sys/types.h>
21:
22: #include <string.h>
23: #include <signal.h>
24:
25: #include "tmux.h"
26:
27: static struct event ev_sighup;
28: static struct event ev_sigchld;
29: static struct event ev_sigcont;
30: static struct event ev_sigterm;
31: static struct event ev_sigusr1;
32: static struct event ev_sigwinch;
33:
34: void
35: set_signals(void (*handler)(int, short, void *), void *arg)
36: {
37: struct sigaction sigact;
38:
39: memset(&sigact, 0, sizeof sigact);
40: sigemptyset(&sigact.sa_mask);
41: sigact.sa_flags = SA_RESTART;
42: sigact.sa_handler = SIG_IGN;
43: if (sigaction(SIGINT, &sigact, NULL) != 0)
44: fatal("sigaction failed");
45: if (sigaction(SIGPIPE, &sigact, NULL) != 0)
46: fatal("sigaction failed");
47: if (sigaction(SIGUSR2, &sigact, NULL) != 0)
48: fatal("sigaction failed");
49: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
50: fatal("sigaction failed");
51:
52: signal_set(&ev_sighup, SIGHUP, handler, arg);
53: signal_add(&ev_sighup, NULL);
54: signal_set(&ev_sigchld, SIGCHLD, handler, arg);
55: signal_add(&ev_sigchld, NULL);
56: signal_set(&ev_sigcont, SIGCONT, handler, arg);
57: signal_add(&ev_sigcont, NULL);
58: signal_set(&ev_sigterm, SIGTERM, handler, arg);
59: signal_add(&ev_sigterm, NULL);
60: signal_set(&ev_sigusr1, SIGUSR1, handler, arg);
61: signal_add(&ev_sigusr1, NULL);
62: signal_set(&ev_sigwinch, SIGWINCH, handler, arg);
63: signal_add(&ev_sigwinch, NULL);
64: }
65:
66: void
67: clear_signals(int after_fork)
68: {
69: struct sigaction sigact;
70:
71: memset(&sigact, 0, sizeof sigact);
72: sigemptyset(&sigact.sa_mask);
73: sigact.sa_flags = SA_RESTART;
74: sigact.sa_handler = SIG_DFL;
75: if (sigaction(SIGINT, &sigact, NULL) != 0)
76: fatal("sigaction failed");
77: if (sigaction(SIGPIPE, &sigact, NULL) != 0)
78: fatal("sigaction failed");
79: if (sigaction(SIGUSR2, &sigact, NULL) != 0)
80: fatal("sigaction failed");
81: if (sigaction(SIGTSTP, &sigact, NULL) != 0)
82: fatal("sigaction failed");
83:
84: if (after_fork) {
85: if (sigaction(SIGHUP, &sigact, NULL) != 0)
86: fatal("sigaction failed");
87: if (sigaction(SIGCHLD, &sigact, NULL) != 0)
88: fatal("sigaction failed");
89: if (sigaction(SIGCONT, &sigact, NULL) != 0)
90: fatal("sigaction failed");
91: if (sigaction(SIGTERM, &sigact, NULL) != 0)
92: fatal("sigaction failed");
93: if (sigaction(SIGUSR1, &sigact, NULL) != 0)
94: fatal("sigaction failed");
95: if (sigaction(SIGWINCH, &sigact, NULL) != 0)
96: fatal("sigaction failed");
97: } else {
98: event_del(&ev_sighup);
99: event_del(&ev_sigchld);
100: event_del(&ev_sigcont);
101: event_del(&ev_sigterm);
102: event_del(&ev_sigusr1);
103: event_del(&ev_sigwinch);
104: }
105: }
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