00b67f09dd
Also known as ISC bind. This import adds utilities such as host(1), dig(1), and nslookup(1), as well as many other tools and libraries. Change-Id: I035ca46e64f1965d57019e773f4ff0ef035e4aa3
56 lines
1.5 KiB
Perl
56 lines
1.5 KiB
Perl
#!/usr/bin/perl
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#
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# Copyright (C) 2004, 2007, 2012, 2014 Internet Systems Consortium, Inc. ("ISC")
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# Copyright (C) 2000, 2001 Internet Software Consortium.
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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# AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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# PERFORMANCE OF THIS SOFTWARE.
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# Id: nanny.pl,v 1.11 2007/06/19 23:47:07 tbox Exp
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# A simple nanny to make sure named stays running.
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$pid_file_location = '/var/run/named.pid';
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$nameserver_location = 'localhost';
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$dig_program = 'dig';
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$named_program = 'named';
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fork() && exit();
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for (;;) {
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$pid = 0;
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open(FILE, $pid_file_location) || goto restart;
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$pid = <FILE>;
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close(FILE);
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chomp($pid);
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$res = kill 0, $pid;
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goto restart if ($res == 0);
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$dig_command =
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"$dig_program +short . \@$nameserver_location > /dev/null";
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$return = system($dig_command);
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goto restart if ($return == 9);
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sleep 30;
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next;
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restart:
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if ($pid != 0) {
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kill 15, $pid;
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sleep 30;
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}
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system ($named_program);
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sleep 120;
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}
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