Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) int main(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 	int fd = open("/dev/watchdog", O_WRONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 	int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 	if (fd == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 		perror("watchdog");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		exit(EXIT_FAILURE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 		ret = write(fd, "\0", 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		if (ret != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 			ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		sleep(10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) }