1 files changed, 47 insertions, 0 deletions
diff --git a/contrib/scripts/nanny.pl b/contrib/scripts/nanny.pl
new file mode 100644
index 0000000..cb93441
--- /dev/null
+++ b/contrib/scripts/nanny.pl
@@ -0,0 +1,47 @@
+#!/usr/bin/perl
+#
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+
+# A simple nanny to make sure named stays running.
+
+$pid_file_location = '/var/run/named.pid';
+$nameserver_location = 'localhost';
+$dig_program = 'dig';
+$named_program =  'named';
+
+fork() && exit();
+
+for (;;) {
+	$pid = 0;
+	open(FILE, $pid_file_location) || goto restart;
+	$pid = <FILE>;
+	close(FILE);
+	chomp($pid);
+
+	$res = kill 0, $pid;
+
+	goto restart if ($res == 0);
+
+	$dig_command =
+	       "$dig_program +short . \@$nameserver_location > /dev/null";
+	$return = system($dig_command);
+	goto restart if ($return == 9);
+
+	sleep 30;
+	next;
+
+ restart:
+	if ($pid != 0) {
+		kill 15, $pid;
+		sleep 30;
+	}
+	system ($named_program);
+	sleep 120;
+}