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Annotation of src/usr.bin/tmux/signal.c, Revision 1.6

1.6     ! nicm        1: /* $OpenBSD: signal.c,v 1.5 2010/05/14 14:41:06 nicm Exp $ */
1.1       nicm        2:
                      3: /*
                      4:  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
                      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:
1.3       nicm       20: #include <string.h>
1.1       nicm       21: #include <signal.h>
                     22:
                     23: #include "tmux.h"
                     24:
1.4       jsing      25: struct event   ev_sighup;
1.1       nicm       26: struct event   ev_sigchld;
                     27: struct event   ev_sigcont;
                     28: struct event   ev_sigterm;
                     29: struct event   ev_sigusr1;
                     30: struct event   ev_sigwinch;
                     31:
                     32: void
1.3       nicm       33: set_signals(void(*handler)(int, short, unused void *))
1.1       nicm       34: {
                     35:        struct sigaction        sigact;
                     36:
                     37:        memset(&sigact, 0, sizeof sigact);
                     38:        sigemptyset(&sigact.sa_mask);
                     39:        sigact.sa_flags = SA_RESTART;
                     40:        sigact.sa_handler = SIG_IGN;
                     41:        if (sigaction(SIGINT, &sigact, NULL) != 0)
                     42:                fatal("sigaction failed");
                     43:        if (sigaction(SIGPIPE, &sigact, NULL) != 0)
                     44:                fatal("sigaction failed");
                     45:        if (sigaction(SIGUSR2, &sigact, NULL) != 0)
                     46:                fatal("sigaction failed");
                     47:        if (sigaction(SIGTSTP, &sigact, NULL) != 0)
                     48:                fatal("sigaction failed");
                     49:
1.4       jsing      50:        signal_set(&ev_sighup, SIGHUP, handler, NULL);
                     51:        signal_add(&ev_sighup, NULL);
1.1       nicm       52:        signal_set(&ev_sigchld, SIGCHLD, handler, NULL);
                     53:        signal_add(&ev_sigchld, NULL);
                     54:        signal_set(&ev_sigcont, SIGCONT, handler, NULL);
                     55:        signal_add(&ev_sigcont, NULL);
                     56:        signal_set(&ev_sigterm, SIGTERM, handler, NULL);
                     57:        signal_add(&ev_sigterm, NULL);
                     58:        signal_set(&ev_sigusr1, SIGUSR1, handler, NULL);
                     59:        signal_add(&ev_sigusr1, NULL);
                     60:        signal_set(&ev_sigwinch, SIGWINCH, handler, NULL);
                     61:        signal_add(&ev_sigwinch, NULL);
                     62: }
                     63:
                     64: void
1.6     ! nicm       65: clear_signals(int after_fork)
1.1       nicm       66: {
                     67:        struct sigaction        sigact;
                     68:
                     69:        memset(&sigact, 0, sizeof sigact);
                     70:        sigemptyset(&sigact.sa_mask);
                     71:        sigact.sa_flags = SA_RESTART;
                     72:        sigact.sa_handler = SIG_DFL;
                     73:        if (sigaction(SIGINT, &sigact, NULL) != 0)
                     74:                fatal("sigaction failed");
                     75:        if (sigaction(SIGPIPE, &sigact, NULL) != 0)
                     76:                fatal("sigaction failed");
                     77:        if (sigaction(SIGUSR2, &sigact, NULL) != 0)
                     78:                fatal("sigaction failed");
                     79:        if (sigaction(SIGTSTP, &sigact, NULL) != 0)
                     80:                fatal("sigaction failed");
                     81:
1.6     ! nicm       82:        if (after_fork) {
        !            83:                if (sigaction(SIGHUP, &sigact, NULL) != 0)
        !            84:                        fatal("sigaction failed");
        !            85:                if (sigaction(SIGCHLD, &sigact, NULL) != 0)
        !            86:                        fatal("sigaction failed");
        !            87:                if (sigaction(SIGCONT, &sigact, NULL) != 0)
        !            88:                        fatal("sigaction failed");
        !            89:                if (sigaction(SIGTERM, &sigact, NULL) != 0)
        !            90:                        fatal("sigaction failed");
        !            91:                if (sigaction(SIGUSR1, &sigact, NULL) != 0)
        !            92:                        fatal("sigaction failed");
        !            93:                if (sigaction(SIGWINCH, &sigact, NULL) != 0)
        !            94:                        fatal("sigaction failed");
        !            95:        } else {
        !            96:                event_del(&ev_sighup);
        !            97:                event_del(&ev_sigchld);
        !            98:                event_del(&ev_sigcont);
        !            99:                event_del(&ev_sigterm);
        !           100:                event_del(&ev_sigusr1);
        !           101:                event_del(&ev_sigwinch);
        !           102:        }
1.1       nicm      103: }