diff options
| -rw-r--r-- | Documentation/watchdog/src/watchdog-simple.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/Documentation/watchdog/src/watchdog-simple.c b/Documentation/watchdog/src/watchdog-simple.c index 47801bc7e742..4cf72f3fa8e9 100644 --- a/Documentation/watchdog/src/watchdog-simple.c +++ b/Documentation/watchdog/src/watchdog-simple.c @@ -3,15 +3,25 @@ #include <unistd.h> #include <fcntl.h> -int main(int argc, const char *argv[]) { +int main(void) +{ int fd = open("/dev/watchdog", O_WRONLY); + int ret = 0; if (fd == -1) { perror("watchdog"); - exit(1); + exit(EXIT_FAILURE); } while (1) { - write(fd, "\0", 1); - fsync(fd); + ret = write(fd, "\0", 1); + if (ret != 1) { + ret = -1; + break; + } + ret = fsync(fd); + if (ret) + break; sleep(10); } + close(fd); + return ret; } |