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Make signal handler setup/teardown two common functions instead of six,

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and reset SIGCHLD after fork to fix problems with some shells. From
Romain Francois.
This commit is contained in:
Nicholas Marriott
2010-05-03 16:06:32 +00:00
parent c919139433
commit ec1d37b1b2
9 changed files with 123 additions and 154 deletions
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90
signal.c Normal file
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@ -0,0 +1,90 @@
/* $OpenBSD$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
* Copyright (c) 2010 Romain Francoise <rfrancoise@debian.org>
*
* 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 <sys/types.h>
#include <signal.h>
#include <string.h>
#include "tmux.h"
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, 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");
if (sigaction(SIGHUP, &sigact, NULL) != 0)
fatal("sigaction failed");
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(void)
{
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 (sigaction(SIGHUP, &sigact, NULL) != 0)
fatal("sigaction failed");
event_del(&ev_sigchld);
event_del(&ev_sigcont);
event_del(&ev_sigterm);
event_del(&ev_sigusr1);
event_del(&ev_sigwinch);
}