/* $Id: signal.c,v 1.1.1.2 2011/08/17 18:40:05 jmmv Exp $ */ /* * Copyright (c) 2007 Nicholas Marriott * Copyright (c) 2010 Romain Francoise * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #include "tmux.h" struct event ev_sighup; struct event ev_sigchld; struct event ev_sigcont; struct event ev_sigterm; struct event ev_sigusr1; struct event ev_sigwinch; void set_signals(void(*handler)(int, short, unused void *)) { struct sigaction sigact; memset(&sigact, 0, sizeof sigact); sigemptyset(&sigact.sa_mask); sigact.sa_flags = SA_RESTART; sigact.sa_handler = SIG_IGN; if (sigaction(SIGINT, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGPIPE, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGUSR2, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGTSTP, &sigact, NULL) != 0) fatal("sigaction failed"); signal_set(&ev_sighup, SIGHUP, handler, NULL); signal_add(&ev_sighup, NULL); signal_set(&ev_sigchld, SIGCHLD, handler, NULL); signal_add(&ev_sigchld, NULL); signal_set(&ev_sigcont, SIGCONT, handler, NULL); signal_add(&ev_sigcont, NULL); signal_set(&ev_sigterm, SIGTERM, handler, NULL); signal_add(&ev_sigterm, NULL); signal_set(&ev_sigusr1, SIGUSR1, handler, NULL); signal_add(&ev_sigusr1, NULL); signal_set(&ev_sigwinch, SIGWINCH, handler, NULL); signal_add(&ev_sigwinch, NULL); } void clear_signals(int after_fork) { struct sigaction sigact; memset(&sigact, 0, sizeof sigact); sigemptyset(&sigact.sa_mask); sigact.sa_flags = SA_RESTART; sigact.sa_handler = SIG_DFL; if (sigaction(SIGINT, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGPIPE, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGUSR2, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGTSTP, &sigact, NULL) != 0) fatal("sigaction failed"); if (after_fork) { if (sigaction(SIGHUP, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGCHLD, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGCONT, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGTERM, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGUSR1, &sigact, NULL) != 0) fatal("sigaction failed"); if (sigaction(SIGWINCH, &sigact, NULL) != 0) fatal("sigaction failed"); } else { event_del(&ev_sighup); event_del(&ev_sigchld); event_del(&ev_sigcont); event_del(&ev_sigterm); event_del(&ev_sigusr1); event_del(&ev_sigwinch); } }