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Annotation of src/usr.bin/tmux/signal.c, Revision 1.1

1.1     ! nicm        1: /* $OpenBSD$ */
        !             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:
        !            20: #include <sys/types.h>
        !            21:
        !            22: #include <signal.h>
        !            23: #include <string.h>
        !            24:
        !            25: #include "tmux.h"
        !            26:
        !            27: struct event   ev_sigchld;
        !            28: struct event   ev_sigcont;
        !            29: struct event   ev_sigterm;
        !            30: struct event   ev_sigusr1;
        !            31: struct event   ev_sigwinch;
        !            32:
        !            33: void
        !            34: set_signals(void(*handler)(int, short, void *))
        !            35: {
        !            36:        struct sigaction        sigact;
        !            37:
        !            38:        memset(&sigact, 0, sizeof sigact);
        !            39:        sigemptyset(&sigact.sa_mask);
        !            40:        sigact.sa_flags = SA_RESTART;
        !            41:        sigact.sa_handler = SIG_IGN;
        !            42:        if (sigaction(SIGINT, &sigact, NULL) != 0)
        !            43:                fatal("sigaction failed");
        !            44:        if (sigaction(SIGPIPE, &sigact, NULL) != 0)
        !            45:                fatal("sigaction failed");
        !            46:        if (sigaction(SIGUSR2, &sigact, NULL) != 0)
        !            47:                fatal("sigaction failed");
        !            48:        if (sigaction(SIGTSTP, &sigact, NULL) != 0)
        !            49:                fatal("sigaction failed");
        !            50:        if (sigaction(SIGHUP, &sigact, NULL) != 0)
        !            51:                fatal("sigaction failed");
        !            52:
        !            53:        signal_set(&ev_sigchld, SIGCHLD, handler, NULL);
        !            54:        signal_add(&ev_sigchld, NULL);
        !            55:        signal_set(&ev_sigcont, SIGCONT, handler, NULL);
        !            56:        signal_add(&ev_sigcont, NULL);
        !            57:        signal_set(&ev_sigterm, SIGTERM, handler, NULL);
        !            58:        signal_add(&ev_sigterm, NULL);
        !            59:        signal_set(&ev_sigusr1, SIGUSR1, handler, NULL);
        !            60:        signal_add(&ev_sigusr1, NULL);
        !            61:        signal_set(&ev_sigwinch, SIGWINCH, handler, NULL);
        !            62:        signal_add(&ev_sigwinch, NULL);
        !            63: }
        !            64:
        !            65: void
        !            66: clear_signals(void)
        !            67: {
        !            68:        struct sigaction        sigact;
        !            69:
        !            70:        memset(&sigact, 0, sizeof sigact);
        !            71:        sigemptyset(&sigact.sa_mask);
        !            72:        sigact.sa_flags = SA_RESTART;
        !            73:        sigact.sa_handler = SIG_DFL;
        !            74:        if (sigaction(SIGINT, &sigact, NULL) != 0)
        !            75:                fatal("sigaction failed");
        !            76:        if (sigaction(SIGPIPE, &sigact, NULL) != 0)
        !            77:                fatal("sigaction failed");
        !            78:        if (sigaction(SIGUSR2, &sigact, NULL) != 0)
        !            79:                fatal("sigaction failed");
        !            80:        if (sigaction(SIGTSTP, &sigact, NULL) != 0)
        !            81:                fatal("sigaction failed");
        !            82:        if (sigaction(SIGHUP, &sigact, NULL) != 0)
        !            83:                fatal("sigaction failed");
        !            84:
        !            85:        event_del(&ev_sigchld);
        !            86:        event_del(&ev_sigcont);
        !            87:        event_del(&ev_sigterm);
        !            88:        event_del(&ev_sigusr1);
        !            89:        event_del(&ev_sigwinch);
        !            90: }