132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
|
|
* Calcurse - text-based organizer
|
|
*
|
|
* Copyright (c) 2004-2013 calcurse Development Team <misc@calcurse.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the
|
|
* following disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the
|
|
* following disclaimer in the documentation and/or other
|
|
* materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* Send your feedback or comments to : misc@calcurse.org
|
|
* Calcurse home page : http://calcurse.org
|
|
*
|
|
*/
|
|
|
|
#ifndef _BSD_SOURCE
|
|
/* Needed for SIGWINCH on OpenBSD. */
|
|
#define _BSD_SOURCE
|
|
#endif
|
|
|
|
#ifndef __BSD_VISIBLE
|
|
/* Needed for SIGWINCH on FreeBSD. */
|
|
#define __BSD_VISIBLE 1
|
|
#endif
|
|
|
|
#ifndef _DARWIN_C_SOURCE
|
|
/* Needed for SIGWINCH on Darwin. */
|
|
#define _DARWIN_C_SOURCE 1
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
#include "calcurse.h"
|
|
|
|
#ifndef WAIT_MYPGRP
|
|
#define WAIT_MYPGRP 0
|
|
#endif
|
|
|
|
/*
|
|
* General signal handling routine.
|
|
* Catch return values from children (user-defined notification commands).
|
|
* This is needed to avoid zombie processes running on system.
|
|
* Also catch CTRL-C (SIGINT), and SIGWINCH to resize screen automatically.
|
|
*/
|
|
static void generic_hdlr(int sig)
|
|
{
|
|
switch (sig) {
|
|
case SIGCHLD:
|
|
while (waitpid(WAIT_MYPGRP, NULL, WNOHANG) > 0) ;
|
|
break;
|
|
case SIGWINCH:
|
|
resize = 1;
|
|
clearok(curscr, TRUE);
|
|
ungetch(KEY_RESIZE);
|
|
break;
|
|
case SIGTERM:
|
|
if (unlink(path_cpid) != 0) {
|
|
EXIT(_("Could not remove calcurse lock file: %s\n"),
|
|
strerror(errno));
|
|
}
|
|
exit(EXIT_SUCCESS);
|
|
break;
|
|
}
|
|
}
|
|
|
|
unsigned sigs_set_hdlr(int sig, void (*handler) (int))
|
|
{
|
|
struct sigaction sa;
|
|
|
|
memset(&sa, 0, sizeof sa);
|
|
sigemptyset(&sa.sa_mask);
|
|
sa.sa_handler = handler;
|
|
sa.sa_flags = 0;
|
|
if (sigaction(sig, &sa, NULL) == -1) {
|
|
ERROR_MSG(_("Error setting signal #%d : %s\n"), sig,
|
|
strerror(errno));
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Signal handling init. */
|
|
void sigs_init()
|
|
{
|
|
if (!sigs_set_hdlr(SIGCHLD, generic_hdlr)
|
|
|| !sigs_set_hdlr(SIGWINCH, generic_hdlr)
|
|
|| !sigs_set_hdlr(SIGTERM, generic_hdlr)
|
|
|| !sigs_set_hdlr(SIGINT, SIG_IGN))
|
|
exit_calcurse(1);
|
|
}
|
|
|
|
/* Ignore SIGWINCH and SIGTERM signals. */
|
|
void sigs_ignore(void)
|
|
{
|
|
sigs_set_hdlr(SIGWINCH, SIG_IGN);
|
|
sigs_set_hdlr(SIGTERM, SIG_IGN);
|
|
}
|
|
|
|
/* No longer ignore SIGWINCH and SIGTERM signals. */
|
|
void sigs_unignore(void)
|
|
{
|
|
sigs_set_hdlr(SIGWINCH, generic_hdlr);
|
|
sigs_set_hdlr(SIGTERM, generic_hdlr);
|
|
}
|