Merge tag 'pxa-dt-4.21' of https://github.com/rjarzmik/linux into next/dt
[muen/linux.git] / samples / watchdog / watchdog-simple.c
1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <unistd.h>
5 #include <fcntl.h>
6
7 int 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 }