blob: 02e7ed16365a5b4ca452d62e0b6fb70b650277af (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#!/usr/bin/perl
#
# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
#
# SPDX-License-Identifier: MPL-2.0
#
# 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 https://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;
}
|
