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/* $OpenBSD: signal.c,v 1.9 2016/01/19 15:59:12 nicm Exp $ */ |
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/* |
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* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com> |
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* Copyright (c) 2010 Romain Francoise <rfrancoise@debian.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER |
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* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING |
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <string.h> |
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#include <signal.h> |
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#include "tmux.h" |
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struct event ev_sighup; |
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struct event ev_sigchld; |
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struct event ev_sigcont; |
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struct event ev_sigterm; |
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struct event ev_sigusr1; |
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struct event ev_sigwinch; |
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void |
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set_signals(void (*handler)(int, short, void *), void *arg) |
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{ |
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struct sigaction sigact; |
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memset(&sigact, 0, sizeof sigact); |
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sigemptyset(&sigact.sa_mask); |
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sigact.sa_flags = SA_RESTART; |
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sigact.sa_handler = SIG_IGN; |
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if (sigaction(SIGINT, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGPIPE, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGUSR2, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGTSTP, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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signal_set(&ev_sighup, SIGHUP, handler, arg); |
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signal_add(&ev_sighup, NULL); |
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signal_set(&ev_sigchld, SIGCHLD, handler, arg); |
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signal_add(&ev_sigchld, NULL); |
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signal_set(&ev_sigcont, SIGCONT, handler, arg); |
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signal_add(&ev_sigcont, NULL); |
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signal_set(&ev_sigterm, SIGTERM, handler, arg); |
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signal_add(&ev_sigterm, NULL); |
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signal_set(&ev_sigusr1, SIGUSR1, handler, arg); |
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signal_add(&ev_sigusr1, NULL); |
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signal_set(&ev_sigwinch, SIGWINCH, handler, arg); |
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signal_add(&ev_sigwinch, NULL); |
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} |
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void |
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clear_signals(int after_fork) |
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{ |
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struct sigaction sigact; |
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memset(&sigact, 0, sizeof sigact); |
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sigemptyset(&sigact.sa_mask); |
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sigact.sa_flags = SA_RESTART; |
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sigact.sa_handler = SIG_DFL; |
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if (sigaction(SIGINT, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGPIPE, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGUSR2, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGTSTP, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (after_fork) { |
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if (sigaction(SIGHUP, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGCHLD, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGCONT, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGTERM, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGUSR1, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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if (sigaction(SIGWINCH, &sigact, NULL) != 0) |
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fatal("sigaction failed"); |
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} else { |
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event_del(&ev_sighup); |
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event_del(&ev_sigchld); |
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event_del(&ev_sigcont); |
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event_del(&ev_sigterm); |
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event_del(&ev_sigusr1); |
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event_del(&ev_sigwinch); |
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} |
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} |