1// SPDX-License-Identifier: GPL-2.0
2#include <stdio.h>
3#include <stdlib.h>
4#include <unistd.h>
5#include <fcntl.h>
6
7int main(void)
8{
9	int fd = open("/dev/watchdog", O_WRONLY);
10	int ret = 0;
11	if (fd == -1) {
12		perror("watchdog");
13		exit(EXIT_FAILURE);
14	}
15	while (1) {
16		ret = write(fd, "\0", 1);
17		if (ret != 1) {
18			ret = -1;
19			break;
20		}
21		sleep(10);
22	}
23	close(fd);
24	return ret;
25}
26