1 files changed, 38 insertions, 0 deletions
diff --git a/wd/wdd.c b/wd/wdd.c
new file mode 100644
index 0000000..3ee0af8
--- /dev/null
+++ b/wd/wdd.c
@@ -0,0 +1,38 @@
+/*
+ * wdd - simple watchdog daemon - 2003 - willy tarreau
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+const char dev_wd_str[] = "/dev/watchdog";
+const char root_str[] = "/";
+
+int main (void) {
+    int dev;
+
+    if (fork() > 0)
+	return 0;
+    for (dev = 2; dev >= 0; dev--)
+	close(dev);
+    chdir(root_str);
+    setsid();
+    /* let's try indefinitely to open the watchdog device */
+    /* note that dev is -1 now ;-) */
+    while (1) {
+	if (dev == -1)
+	    dev = open(dev_wd_str, O_RDWR);
+	if ((dev != -1) && (write(dev, dev_wd_str, 1) != 1)) {
+	    /* write error, we'll restart */
+	    close(dev);
+	    dev = -1;
+	}
+	/* avoid a fast loop */
+	sleep(1);
+    }
+    /* we never get there theorically... */
+    return 0;
+}
+