Actually, just rewrote it. I also added a useful feature the original
doesn't have (--status).
--
Robert Millan
/*
* timeout.c -- run commands with a specified timeout
* Copyright (C) 2007 Robert Millan <[EMAIL PROTECTED]>
*
* GRUB is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <getopt.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#define PROGRAM_NAME "timeout"
#define PROGRAM_VERSION "0.0.1"
int pid;
int signum = SIGTERM;
int timeout_status = 1;
static struct option options[] =
{
{"signal", required_argument, 0, 's'},
{"status", required_argument, 0, 't'},
{"help", no_argument, 0, 'h'},
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0}
};
static void
usage (int status)
{
if (status)
fprintf (stderr, "Try ``" PROGRAM_NAME " --help'' for more information.\n");
else
printf ("\
Usage: " PROGRAM_NAME " [OPTION]... NUMBER COMMAND ARGUMENTS\n\
Runs COMMAND with ARGUMENTS, and kills it after NUMBER seconds.\n\
\n\
-s, --signal SIGNUM use SIGNUM to kill our child\n\
-t, --status NUMBER after killing our child, exit with NUMBER\n\
-h, --help display this message and exit\n\
-v, --version print version information and exit\n\
\n");
exit (status);
}
void
handler (int dummy)
{
kill (signum, pid);
exit (timeout_status);
}
main (int argc, char **argv)
{
int timeout;
char *tail;
/* Check for options. */
while (1)
{
int c = getopt_long (argc, argv, "hs:t:v", options, 0);
if (c == -1)
break;
switch (c)
{
case 'h':
usage (0);
case 'v':
printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
exit (0);
break;
case 's':
signum = strtol (optarg, &tail, 10);
if (tail[0] != '\0')
usage (1);
break;
case 't':
timeout_status = strtol (optarg, &tail, 10);
if (tail[0] != '\0')
usage (1);
break;
default:
usage (1);
}
}
/* Ditch getopt args -- no longer needed */
argv += optind;
if (argv[0] == NULL)
usage (1);
timeout = strtol (argv[0], &tail, 10);
if (tail[0] != '\0')
usage (1);
/* Ditch timeout -- no longer needed */
argv++;
signal (SIGALRM, handler);
pid = fork ();
switch (pid)
{
case -1:
perror ("fork");
exit (1);
case 0:
execvp (argv[0], argv);
perror ("execvp");
exit (1);
default:
{
int child_status;
alarm (timeout);
while (waitpid (pid, &child_status, WNOHANG) == 0);
exit (child_status);
}
}
}
