Documentation/: fix warnings from -Wmissing-prototypes in HOSTCFLAGS
[linux-2.6.git] / Documentation / watchdog / src / watchdog-simple.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <unistd.h>
4 #include <fcntl.h>
5
6 int 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                 ret = fsync(fd);
21                 if (ret)
22                         break;
23                 sleep(10);
24         }
25         close(fd);
26         return ret;
27 }