checkservice 1.1.0-12 / usr / share / checkservice / check / ssh.plugin

#!/usr/bin/perl
#
#    Copyright (C) 1998, Jim Trocki
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# Modified by Paul van Tilburg. Speedup needed for Checkservice...
# (removed multiple host support and changed default values)
# 
# Modified for ssh by Justin Penney <justin@solve.net>

use Getopt::Std;
use English;
require "opensocket.pl";

getopts ("p:t:h:");
$Port = $opt_p || 22;
$TIMEOUT = $opt_t || 5;
$Host = $opt_h || "localhost";

exit &sshGET($Host, $Port);

sub sshGET {
  use Socket;

  my ($Server, $Port) = @_;
  my $ServerOK = 1;
  my $ok;

  eval {
    local $SIG{ALRM} = sub { die "Timeout Alarm" };
    alarm $TIMEOUT;

    $result = &OpenSocket($Server, $Port); # Open a connection to the server
    if (!$result) { # Failure to open the socket
      return 1;
    }

    while ($in = <S>) {
      if ($in =~ /^SSH/) {
      	$ok = 0;
      	last;
      }
    }
    print S $in;

    if ($ok) {
      alarm 0;
      return 1;
    }

    $ServerOK = 0;

    close(S);
    alarm 0; # Cancel the alarm

  };

  if ($EVAL_ERROR and ($EVAL_ERROR =~ /Timeout Alarm/)) {
    return 2;
  }
  return $ServerOK;
}