/* vi: set sw=4 ts=4: *//* * Mini watchdog implementation for busybox * * Copyright (C) 2000  spoon <spoon@ix.netcom.com>. * * This program 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 2 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * *//* getopt not needed */#include <stdio.h>#include <fcntl.h>#include <unistd.h>#include <stdlib.h>#include "busybox.h"extern int watchdog_main(int argc, char **argv){	int fd;	if (argc != 2) {		show_usage();	}	if ((fd=open(argv[1], O_WRONLY)) == -1) {		perror_msg_and_die(argv[1]);	}	while (1) {		sleep(30);		write(fd, "\0", 1);	}	return EXIT_FAILURE;}