[WATCHDOG] Documentation/watchdog/src/watchdog-simple.c: improve this…

… code Make some improvements for Documentation/watchdog/src/watchdog-simple.c. Signed-off-by: WANG Cong <[email protected]> Signed-off-by: Wim Van Sebroeck <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
fracktal · Oct 23, 2007 · 06063e2 · 06063e2
1 parent c283cf2
commit 06063e2
Showing 1 changed file with 14 additions and 4 deletions.
diff --git 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;
 }