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-rw-r--r--watchdog.c45
1 files changed, 45 insertions, 0 deletions
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1/* vi: set sw=4 ts=4: */
2/*
3 * Mini watchdog implementation for busybox
4 *
5 * Copyright (C) 2000 spoon <spoon@ix.netcom.com>.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23#include "busybox.h"
24#include <stdio.h>
25#include <fcntl.h>
26
27extern int watchdog_main(int argc, char **argv)
28{
29 int fd;
30
31 if (argc != 2) {
32 usage(watchdog_usage);
33 }
34
35 if ((fd=open(argv[1], O_WRONLY)) == -1) {
36 perror_msg_and_die(argv[1]);
37 }
38
39 while (1) {
40 sleep(30);
41 write(fd, "\0", 1);
42 }
43
44 return EXIT_FAILURE;
45}