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Linux/Documentation/watchdog/src/watchdog-simple.c

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  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                 sleep(10);
 21         }
 22         close(fd);
 23         return ret;
 24 }
 25 

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