9a58d78ab3fb9f8bcd0eb1ed523dfc285cf03387
1 #! /usr/bin/perl -wT
3 # (c)1999 Ian Cass, Knowledge Matters Ltd.
4 # Read the GNU copyright stuff for all the legalese
5 #
6 # Check NTP time servers plugin. This plugin requires the ntpdate utility to
7 # be installed on the system, however since it's part of the ntp suite, you
8 # should already have it installed.
9 #
10 # $Id$
11 #
12 # Nothing clever done in this program - its a very simple bare basics hack to
13 # get the job done.
14 #
15 # Things to do...
16 # check @words[9] for time differences greater than +/- x secs & return a
17 # warning.
18 #
19 # (c) 1999 Mark Jewiss, Knowledge Matters Limited
20 # 22-9-1999, 12:45
21 #
22 # Modified script to accept 2 parameters or set defaults.
23 # Now issues warning or critical alert is time difference is greater than the
24 # time passed.
25 #
26 # These changes have not been tested completely due to the unavailability of a
27 # server with the incorrect time.
28 #
29 # (c) 1999 Bo Kersey, VirCIO - Managed Server Solutions <bo@vircio.com>
30 # 22-10-99, 12:17
31 #
32 # Modified the script to give useage if no parameters are input.
33 #
34 # Modified the script to check for negative as well as positive
35 # time differences.
36 #
37 # Modified the script to work with ntpdate 3-5.93e Wed Apr 14 20:23:03 EDT 1999
38 #
39 # Modified the script to work with ntpdate's that return adjust or offset...
40 #
41 #
42 # Script modified 2000 June 01 by William Pietri <william@bianca.com>
43 #
44 # Modified script to handle weird cases:
45 # o NTP server doesn't respond (e.g., has died)
46 # o Server has correct time but isn't suitable synchronization
47 # source. This happens while starting up and if contact
48 # with master has been lost.
49 #
50 # Modifed to run under Embedded Perl
51 #
54 require 5.004;
55 use POSIX;
56 use strict;
57 use Getopt::Long;
58 use vars qw($opt_V $opt_h $opt_H $opt_w $opt_c $verbose $PROGNAME);
59 use lib utils.pm ;
60 use utils qw($TIMEOUT %ERRORS &print_revision &support);
62 $PROGNAME="check_ntp";
64 sub print_help ();
65 sub print_usage ();
67 $ENV{'PATH'}='';
68 $ENV{'BASH_ENV'}='';
69 $ENV{'ENV'}='';
71 Getopt::Long::Configure('bundling');
72 GetOptions
73 ("V" => \$opt_V, "version" => \$opt_V,
74 "h" => \$opt_h, "help" => \$opt_h,
75 "v" => \$verbose, "verbose" => \$verbose,
76 "w=s" => \$opt_w, "warning=s" => \$opt_w,
77 "c=s" => \$opt_c, "critical=s" => \$opt_c,
78 "H=s" => \$opt_H, "hostname=s" => \$opt_H);
80 if ($opt_V) {
81 print_revision($PROGNAME,'$Revision$ ');
82 exit $ERRORS{'OK'};
83 }
85 if ($opt_h) {
86 print_help();
87 exit $ERRORS{'OK'};
88 }
90 $opt_H = shift unless ($opt_H);
91 my $host = $1 if ($opt_H && $opt_H =~ m/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+|[a-zA-Z][-a-zA-Z0-9]+(\.[a-zA-Z][-a-zA-Z0-9]+)*)$/);
92 unless ($host) {
93 print_usage();
94 exit $ERRORS{'UNKNOWN'};
95 }
97 ($opt_w) || ($opt_w = shift) || ($opt_w = 60);
98 my $warning = $1 if ($opt_w =~ /([0-9]+)/);
100 ($opt_c) || ($opt_c = shift) || ($opt_c = 120);
101 my $critical = $1 if ($opt_c =~ /([0-9]+)/);
103 my $answer = undef;
104 my $offset = undef;
105 my $msg; # first line of output to print if format is invalid
107 my $state = $ERRORS{'UNKNOWN'};
108 my $ntpdate_error = $ERRORS{'UNKNOWN'};
109 my $dispersion_error = $ERRORS{'UNKNOWN'};
111 my $key = undef;
113 # Just in case of problems, let's not hang Nagios
114 $SIG{'ALRM'} = sub {
115 print ("ERROR: No response from ntp server (alarm)\n");
116 exit $ERRORS{"UNKNOWN"};
117 };
118 alarm($TIMEOUT);
121 ###
122 ###
123 ### First, check ntpdate
124 ###
125 ###
127 if (!open (NTPDATE, "/usr/local/sbin/ntpdate -q $host 2>&1 |")) {
128 print "Could not open ntpdate\n";
129 exit $ERRORS{"UNKNOWN"};
130 }
132 while (<NTPDATE>) {
133 print if ($verbose);
134 $msg = $_ unless ($msg);
135 if (/(offset|adjust)\s+([-.\d]+)/i) {
136 $offset = $2;
137 last;
138 }
139 }
141 # soak up remaining output; check for error
142 while (<NTPDATE>) {
143 if (/no server suitable for synchronization found/) {
144 $ntpdate_error = $ERRORS{"CRITICAL"};
145 }
146 }
148 close(NTPDATE);
150 # only declare an error if we also get a non-zero return code from ntpdate
151 $ntpdate_error = ($? >> 8) || $ntpdate_error;
153 ###
154 ###
155 ### Then scan xntpdc if it exists
156 ###
157 ###
159 if (#open(NTPDC,"/usr/sbin/ntpdc -c $host 2>&1 |") ||
160 open(NTPDC,"/usr/sbin/xntpdc -c $host 2>&1 |") ) {
161 while (<NTPDC>) {
162 print if ($verbose);
163 if (/([^\s]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)\s+([-0-9.]+)/) {
164 if ($8>15) {
165 $dispersion_error = $ERRORS{'CRITICAL'};
166 } elsif ($8>5 && $dispersion_error<$ERRORS{'CRITICAL'}) {
167 $dispersion_error = $ERRORS{'WARNING'};
168 }
169 }
170 }
171 close NTPDC;
172 }
174 # An offset of 0.000000 with an error is probably bogus. Actually,
175 # it's probably always bogus, but let's be paranoid here.
176 if ($ntpdate_error && $offset && ($offset == 0)) { undef $offset;}
178 if ($ntpdate_error > $ERRORS{'OK'}) {
179 $state = $ntpdate_error;
180 $answer = "Server for ntp probably down\n";
181 if (defined($offset) && abs($offset) > $critical) {
182 $state = $ERRORS{'CRITICAL'};
183 $answer = "Server Error and time difference $offset seconds greater than +/- $critical sec\n";
184 } elsif (defined($offset) && abs($offset) > $warning) {
185 $answer = "Server error and time difference $offset seconds greater than +/- $warning sec\n";
186 }
188 } elsif ($dispersion_error > $ERRORS{'OK'}) {
189 $state = $dispersion_error;
190 $answer = "Dispersion too high\n";
191 if (defined($offset) && abs($offset) > $critical) {
192 $state = $ERRORS{'CRITICAL'};
193 $answer = "Dispersion error and time difference $offset seconds greater than +/- $critical sec\n";
194 } elsif (defined($offset) && abs($offset) > $warning) {
195 $answer = "Dispersion error and time difference $offset seconds greater than +/- $warning sec\n";
196 }
198 } else { # no errors from ntpdate or xntpdc
199 if (defined $offset) {
200 if (abs($offset) > $critical) {
201 $state = $ERRORS{'CRITICAL'};
202 $answer = "Time difference $offset seconds greater than +/- $critical sec\n";
203 } elsif (abs($offset) > $warning) {
204 $state = $ERRORS{'WARNING'};
205 $answer = "Time difference $offset seconds greater than +/- $warning sec\n";
206 } elsif (abs($offset) <= $warning) {
207 $state = $ERRORS{'OK'};
208 $answer = "Time difference $offset seconds\n";
209 }
210 } else { # no offset defined
211 $state = $ERRORS{'UNKNOWN'};
212 $answer = "Invalid format returned from ntpdate ($msg)\n";
213 }
214 }
216 foreach $key (keys %ERRORS) {
217 if ($state==$ERRORS{$key}) {
218 print ("$key: $answer");
219 last;
220 }
221 }
222 exit $state;
224 sub print_usage () {
225 print "Usage: $PROGNAME -H <host> [-w <warn>] [-c <crit>]\n";
226 }
228 sub print_help () {
229 print_revision($PROGNAME,'$Revision$');
230 print "Copyright (c) 2000 Bo Kersey/Karl DeBisschop\n";
231 print "\n";
232 print_usage();
233 print "\n";
234 print "<warn> = Clock offset in seconds at which a warning message will be generated.\n Defaults to 60.\n";
235 print "<crit> = Clock offset in seconds at which a critical message will be generated.\n Defaults to 120.\n\n";
236 support();
237 }