| 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(file: "/dev/watchdog", O_WRONLY); |
| 10 | int ret = 0; |
| 11 | if (fd == -1) { |
| 12 | perror(s: "watchdog"); |
| 13 | exit(EXIT_FAILURE); |
| 14 | } |
| 15 | while (1) { |
| 16 | ret = write(fd: fd, buf: "\0", n: 1); |
| 17 | if (ret != 1) { |
| 18 | ret = -1; |
| 19 | break; |
| 20 | } |
| 21 | sleep(seconds: 10); |
| 22 | } |
| 23 | close(fd: fd); |
| 24 | return ret; |
| 25 | } |
| 26 |