Annotation of embedaddon/tmux/signal.c, revision 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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