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#!/usr/bin/env perl
# Copyright © 2010 by Daniel Friesel <derf@finalrewind.org>
# License: WTFPL:
# 0. You just DO WHAT THE FUCK YOU WANT TO.
#
# SSH forcecommand to be used for nagios ssh checks etc.
# Example line for ssh authorized_keys file:
# command="/usr/local/lib/nagios/forcecommand /etc/nagios/forcecommand.cfg",no-agent-forwarding,no-port-forwarding,no-pty,no-X11-forwarding $key
#
# Configfile format:
# ssh_command = real_command
# Example:
# check_users = /usr/lib/nagios/plugins/check_users -w 5 -c 10
use strict;
use warnings;
my $conffile = shift or die("Usage: $0 <configfile>\n");
my %commands;
my $input = $ENV{'SSH_ORIGINAL_COMMAND'} or die("No command\n");;
open(my $conf, '<', $conffile) or die("Can't open $conffile: $!\n");
while (my $line = <$conf>) {
my ($key, $value) = split(/ \s* = \s* /x, $line);
if ($key and $value) {
$commands{$key} = $value;
}
}
close($conf) or die("Cannot close $conffile: $!\n");
if (exists $commands{$input}) {
exec($commands{$input});
exit 1;
}
die("Unknown command\n");
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