1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/Documentation/watchdog/src/watchdog-simple.c b/kernel/Documentation/watchdog/src/watchdog-simple.c
new file mode 100644
index 000000000..ba45803a2
--- /dev/null
+++ b/kernel/Documentation/watchdog/src/watchdog-simple.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+int main(void)
+{
+	int fd = open("/dev/watchdog", O_WRONLY);
+	int ret = 0;
+	if (fd == -1) {
+		perror("watchdog");
+		exit(EXIT_FAILURE);
+	}
+	while (1) {
+		ret = write(fd, "\0", 1);
+		if (ret != 1) {
+			ret = -1;
+			break;
+		}
+		sleep(10);
+	}
+	close(fd);
+	return ret;
+}