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#!/usr/bin/perl -w
#================================================================
#
# This perl script will accept an argument and simply pass it
# to ping. It works by sending 2 ping to the specified host
# and evaluating on the average delta time of those 2 pings.
#
# Author: SpEnTBoY
# Email: lonny@abyss.za.org
# April 5,2000
#
#================================================================
#============================
# State predefined stuff and
# requirements
#============================
require 5.004;
use POSIX;
use strict;
sub usage;
my $ipaddr = $ARGV[0];
my $TIMEOUT = 15;
my %ERRORS = ('UNKNOWN' , '-1',
'OK' , '0',
'WARNING', '1',
'CRITICAL', '2');
my $remote = shift || &usage(%ERRORS);
my $warning = shift || 750;
my $critical = shift || 1000;
my $state = "OK";
my $answer = undef;
my $offset = undef;
my $line = undef;
#============================================================
# If theres no response we can exit the bloody thing cleanly
# last thing I want to do is hang an AIX system ;-)
#============================================================
$SIG{'ALRM'} = sub {
print ("ERROR: No response from PING! (alarm)\n");
exit $ERRORS{"UNKNOWN"};
};
alarm($TIMEOUT);
#================================================
# Pass stddn from $ARGV to the command and parse
# the info we need (namely the value for "max"
#================================================
open(PING,"/usr/sbin/ping -c 2 '$ipaddr' >&1|");
while (<PING>) {
$line = $_;
if (/round-trip min\/avg\/max = (.+)\/(.+)\/(.+) ms/) {
$offset = $3;
last;
}
}
#==================================================
# Do some error checking on the output of the file
# and implement values for <crit> and <warn>
# deffinitions if they were specified by the user
# or sub in the predefined ones
#==================================================
if (defined $offset) {
if (abs($offset) > $warning) {
if (abs($offset) > $critical) {
$state = "CRITICAL";
$answer = ": Ping Time $offset MS greater than +/- $critical MS\n";
} else {
$state = "WARNING";
$answer = ": Ping Time $offset MS greater than +/- $warning MS\n";
}
} else {
$state = "OK";
$answer = ": Ping Time $offset MS\n";
}
} else {
$state = "UNKNOWN";
$answer = ": $line\n";
}
print ("$state$answer");
exit $ERRORS{$state};
sub usage {
print "\n";
print "#=========================================\n";
print "Check_Ping 0.02 script by Lonny Selinger\n";
print "Made with AIX in mind ;-)\n";
print "#=========================================\n";
print "\n";
print "#================================================\n";
print " I'm going to need a few more arguments from you\n";
print "#================================================\n";
print "\n";
print "#================================================\n";
print "Usage: check_ping <host> [<warn> [<crit>]\n";
print "#================================================\n";
print "\n";
print "<warn> = Ping in MS at which a warning message will be generated.\n Defaults to 750.\n";
print "<crit> = Ping in MS at which a critical message will be generated.\n Defaults to 1000.\n\n";
exit $ERRORS{"UNKNOWN"};
}
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