1#include <stdio.h>
2#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h>
5
6int main(void)
7{
8	int fd = open("/dev/watchdog", O_WRONLY);
9	int ret = 0;
10	if (fd == -1) {
11		perror("watchdog");
12		exit(EXIT_FAILURE);
13	}
14	while (1) {
15		ret = write(fd, "\0", 1);
16		if (ret != 1) {
17			ret = -1;
18			break;
19		}
20		sleep(10);
21	}
22	close(fd);
23	return ret;
24}
25