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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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