1 files changed, 236 insertions, 0 deletions

diff --git a/plugins-scripts/check_ntp.pl b/plugins-scripts/check_ntp.pl
new file mode 100755
index 0000000..f3f6f78
--- /dev/null
+++ b/plugins-scripts/check_ntp.pl
@@ -0,0 +1,236 @@
+#! /usr/bin/perl -wT
+
+# (c)1999 Ian Cass, Knowledge Matters Ltd.
+# Read the GNU copyright stuff for all the legalese
+#
+# Check NTP time servers plugin. This plugin requires the ntpdate utility to
+# be installed on the system, however since it's part of the ntp suite, you 
+# should already have it installed.
+#
+# Nothing clever done in this program - its a very simple bare basics hack to
+# get the job done.
+#
+# Things to do...
+# check @words[9] for time differences greater than +/- x secs & return a
+# warning.
+#
+# (c) 1999 Mark Jewiss, Knowledge Matters Limited
+# 22-9-1999, 12:45
+#
+# Modified script to accept 2 parameters or set defaults.
+# Now issues warning or critical alert is time difference is greater than the 
+# time passed.
+#
+# These changes have not been tested completely due to the unavailability of a
+# server with the incorrect time.
+#
+# (c) 1999 Bo Kersey, VirCIO - Managed Server Solutions <bo@vircio.com>
+# 22-10-99, 12:17
+#
+# Modified the script to give useage if no parameters are input.
+#
+# Modified the script to check for negative as well as positive 
+# time differences.
+#
+# Modified the script to work with ntpdate 3-5.93e Wed Apr 14 20:23:03 EDT 1999
+#
+# Modified the script to work with ntpdate's that return adjust or offset...
+#
+#
+# Script modified 2000 June 01 by William Pietri <william@bianca.com>
+#
+# Modified script to handle weird cases:
+#     o NTP server doesn't respond (e.g., has died)
+#     o Server has correct time but isn't suitable synchronization
+#           source. This happens while starting up and if contact
+#           with master has been lost.
+#
+BEGIN {
+        if ($0 =~ m/^(.*?)[\/\\]([^\/\\]+)$/) {
+                $runtimedir = $1;
+                $PROGNAME = $2;
+        }
+}
+
+require 5.004;
+use POSIX;
+use strict;
+use Getopt::Long;
+use vars qw($opt_V $opt_h $opt_H $opt_w $opt_c $verbose $PROGNAME);
+use lib $main::runtimedir;
+use utils qw($TIMEOUT %ERRORS &print_revision &support);
+
+sub print_help ();
+sub print_usage ();
+
+$ENV{'PATH'}='';
+$ENV{'BASH_ENV'}='';
+$ENV{'ENV'}='';
+
+Getopt::Long::Configure('bundling');
+GetOptions
+        ("V"   => \$opt_V, "version"    => \$opt_V,
+         "h"   => \$opt_h, "help"       => \$opt_h,
+         "v" => \$verbose, "verbose"  => \$verbose,
+         "w=s" => \$opt_w, "warning=s"  => \$opt_w,
+         "c=s" => \$opt_c, "critical=s" => \$opt_c,
+         "H=s" => \$opt_H, "hostname=s" => \$opt_H);
+
+if ($opt_V) {
+        print_revision($PROGNAME,'$Revision$ ');
+        exit $ERRORS{'OK'};
+}
+
+if ($opt_h) {
+        print_help();
+        exit $ERRORS{'OK'};
+}
+
+$opt_H = shift unless ($opt_H);
+my $host = $1 if ($opt_H && $opt_H =~ m/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+|[a-zA-Z][-a-zA-Z0-9]+(\.[a-zA-Z][-a-zA-Z0-9]+)*)$/);
+unless ($host) {
+        print_usage();
+        exit $ERRORS{'UNKNOWN'};
+}
+
+($opt_w) || ($opt_w = shift) || ($opt_w = 60);
+my $warning = $1 if ($opt_w =~ /([0-9]+)/);
+
+($opt_c) || ($opt_c = shift) || ($opt_c = 120);
+my $critical = $1 if ($opt_c =~ /([0-9]+)/);
+
+my $answer = undef;
+my $offset = undef;
+my $msg; # first line of output to print if format is invalid
+
+my $state = $ERRORS{'UNKNOWN'};
+my $ntpdate_error = $ERRORS{'UNKNOWN'};
+my $dispersion_error = $ERRORS{'UNKNOWN'};
+
+my $key = undef;
+
+# Just in case of problems, let's not hang Nagios
+$SIG{'ALRM'} = sub {
+        print ("ERROR: No response from ntp server (alarm)\n");
+        exit $ERRORS{"UNKNOWN"};
+};
+alarm($TIMEOUT);
+
+
+###
+###
+### First, check ntpdate
+###
+###
+
+if (!open (NTPDATE, "/usr/local/sbin/ntpdate -q $host 2>&1 |")) {
+        print "Could not open ntpdate\n";
+        exit $ERRORS{"UNKNOWN"};
+}
+
+while (<NTPDATE>) {
+        print if ($verbose);
+        $msg = $_ unless ($msg);
+        if (/(offset|adjust)\s+([-.\d]+)/i) {
+                $offset = $2;
+                last;
+        }
+}
+
+# soak up remaining output; check for error
+while (<NTPDATE>) {
+        if (/no server suitable for synchronization found/) {
+                $ntpdate_error = $ERRORS{"CRITICAL"};
+        }
+}
+
+close(NTPDATE);
+
+# only declare an error if we also get a non-zero return code from ntpdate
+$ntpdate_error = ($? >> 8) || $ntpdate_error;
+
+###
+###
+### Then scan xntpdc if it exists
+###
+###
+
+if (#open(NTPDC,"/usr/sbin/ntpdc -c $host 2>&1 |") ||
+    open(NTPDC,"/usr/sbin/xntpdc -c $host 2>&1 |") ) {
+        while (<NTPDC>) {
+                print if ($verbose);
+                if (/([^\s]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)/) {
+                        if ($8>15) {
+                                $dispersion_error = $ERRORS{'CRITICAL'};
+                        } elsif ($8>5 && $dispersion_error<$ERRORS{'CRITICAL'}) {
+                                $dispersion_error = $ERRORS{'WARNING'};
+                        }
+                }
+        }
+        close NTPDC;
+}
+
+# An offset of 0.000000 with an error is probably bogus. Actually,
+# it's probably always bogus, but let's be paranoid here.
+if ($ntpdate_error && $offset && ($offset == 0)) { undef $offset;}
+
+if ($ntpdate_error > $ERRORS{'OK'}) {
+        $state = $ntpdate_error;
+        $answer = "Server for ntp probably down\n";
+        if (defined($offset) && abs($offset) > $critical) {
+                $state = $ERRORS{'CRITICAL'};
+                $answer = "Server Error and time difference $offset seconds greater than +/- $critical sec\n";
+        } elsif (defined($offset) && abs($offset) > $warning) {
+                $answer = "Server error and time difference $offset seconds greater than +/- $warning sec\n";
+        }
+
+} elsif ($dispersion_error > $ERRORS{'OK'}) {
+        $state = $dispersion_error;
+        $answer = "Dispersion too high\n";
+        if (defined($offset) && abs($offset) > $critical) {
+                $state = $ERRORS{'CRITICAL'};
+                $answer = "Dispersion error and time difference $offset seconds greater than +/- $critical sec\n";
+        } elsif (defined($offset) && abs($offset) > $warning) {
+                $answer = "Dispersion error and time difference $offset seconds greater than +/- $warning sec\n";
+        }
+
+} else { # no errors from ntpdate or xntpdc
+        if (defined $offset) {
+                if (abs($offset) > $critical) {
+                        $state = $ERRORS{'CRITICAL'};
+                        $answer = "Time difference $offset seconds greater than +/- $critical sec\n";
+                } elsif (abs($offset) > $warning) {
+                        $state = $ERRORS{'WARNING'};
+                        $answer = "Time difference $offset seconds greater than +/- $warning sec\n";
+                } elsif (abs($offset) <= $warning) {
+                        $state = $ERRORS{'OK'};
+                        $answer = "Time difference $offset seconds\n";
+                }
+        } else { # no offset defined
+                $state = $ERRORS{'UNKNOWN'};
+                $answer = "Invalid format returned from ntpdate ($msg)\n";
+        }
+}
+
+foreach $key (keys %ERRORS) {
+        if ($state==$ERRORS{$key}) {
+                print ("$key: $answer");
+                last;
+        }
+}
+exit $state;
+
+sub print_usage () {
+        print "Usage: $PROGNAME -H <host> [-w <warn>] [-c <crit>]\n";
+}
+
+sub print_help () {
+        print_revision($PROGNAME,'$Revision$');
+        print "Copyright (c) 2000 Bo Kersey/Karl DeBisschop\n";
+        print "\n";
+        print_usage();
+        print "\n";
+        print "<warn> = Clock offset in seconds at which a warning message will be generated.\n Defaults to 60.\n";
+        print "<crit> = Clock offset in seconds at which a critical message will be generated.\n        Defaults to 120.\n\n";
+        support();
+}