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56040be346
Do not call event_del() for signals after fork(), just use sigaction() directly instead - calling libevent functions after fork() w/o event_reinit() is a bad idea, even if in this case it was harmless.
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* $Id: signal.c,v 1.3 2010-08-29 14:42:11 tcunha Exp $ */
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/*
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* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
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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 <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, unused void *))
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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, NULL);
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signal_add(&ev_sighup, NULL);
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signal_set(&ev_sigchld, SIGCHLD, handler, NULL);
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signal_add(&ev_sigchld, NULL);
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signal_set(&ev_sigcont, SIGCONT, handler, NULL);
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signal_add(&ev_sigcont, NULL);
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signal_set(&ev_sigterm, SIGTERM, handler, NULL);
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signal_add(&ev_sigterm, NULL);
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signal_set(&ev_sigusr1, SIGUSR1, handler, NULL);
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signal_add(&ev_sigusr1, NULL);
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signal_set(&ev_sigwinch, SIGWINCH, handler, NULL);
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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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}
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