mirror of
https://github.com/tmux/tmux.git
synced 2024-11-05 10:28:48 +00:00
56040be346
Do not call event_del() for signals after fork(), just use sigaction() directly instead - calling libevent functions after fork() w/o event_reinit() is a bad idea, even if in this case it was harmless.
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* $Id: signal.c,v 1.3 2010-08-29 14:42:11 tcunha Exp $ */
|
|
|
|
/*
|
|
* 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 <string.h>
|
|
#include <signal.h>
|
|
|
|
#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);
|
|
}
|
|
}
|