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/*
This file is part of GNUnet
Copyright (C) 2010 GNUnet e.V.
GNUnet is free software: you can redistribute it and/or modify it
under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @file src/util/gnunet-timeout.c
* @brief small tool starting a child process, waiting that it terminates or killing it after a given timeout period
* @author Matthias Wachs
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static pid_t child;
static void
sigchld_handler(int val)
{
int status = 0;
int ret = 0;
(void)val;
waitpid(child, &status, 0);
if (WIFEXITED(status) != 0)
{
ret = WEXITSTATUS(status);
fprintf(stderr, "Process exited with result %u\n", ret);
_exit(ret); /* return same status code */
}
if (WIFSIGNALED(status) != 0)
{
ret = WTERMSIG(status);
fprintf(stderr, "Process received signal %u\n", ret);
kill(getpid(), ret); /* kill self with the same signal */
}
_exit(-1);
}
static void
sigint_handler(int val)
{
kill(0, val);
_exit(val);
}
int
main(int argc, char *argv[])
{
int timeout = 0;
pid_t gpid = 0;
if (argc < 3)
{
fprintf(stderr,
"arg 1: timeout in sec., arg 2: executable, arg<n> arguments\n");
exit(-1);
}
timeout = atoi(argv[1]);
if (timeout == 0)
timeout = 600;
/* with getpgid() it does not compile, but getpgrp is the BSD version and working */
gpid = getpgrp();
signal(SIGCHLD, sigchld_handler);
signal(SIGABRT, sigint_handler);
signal(SIGFPE, sigint_handler);
signal(SIGILL, sigint_handler);
signal(SIGINT, sigint_handler);
signal(SIGSEGV, sigint_handler);
signal(SIGTERM, sigint_handler);
child = fork();
if (child == 0)
{
/* int setpgrp(pid_t pid, pid_t pgid); is not working on this machine */
//setpgrp (0, pid_t gpid);
if (-1 != gpid)
setpgid(0, gpid);
execvp(argv[2], &argv[2]);
exit(-1);
}
if (child > 0)
{
sleep(timeout);
printf("Child processes were killed after timeout of %u seconds\n",
timeout);
kill(0, SIGTERM);
exit(3);
}
exit(-1);
}
/* end of timeout_watchdog.c */
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