/usr/lib/nagios/plugins/check_clamav is in nagios-plugins-contrib 9.20140106.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | #!/usr/bin/perl -w
#
# Copyright (c) 2005-2008 Darren Spruell <phatbuckett@gmail.com>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#
################################################################################
# This script is used to compare the version and signature level of the
# currently running clamscan daemon with the latest available versions listed in
# the TXT record for current.cvd.clamav.net.
#
# In order to use this script, you might need to make the following adjustments:
# - Set the "use lib" path correctly (where utils.pm is located.)
# - Set the path to your clamscan binary in $clamscan_cmd.
#
# This plugin requires the Net::DNS Perl module.
################################################################################
# Plugin directory / home of utils.pm.
use lib "/usr/lib/nagios/plugins";
use utils qw(%ERRORS &print_revision &support &usage);
use Getopt::Long qw(:config no_ignore_case bundling);
use File::Basename;
use Net::DNS;
use strict;
# Path to installed clamscan binary.
my $clamscan_cmd = "/usr/bin/clamscan";
# Leave the rest of this alone:
my $prog_name = basename $0;
my $prog_ver = "1.2";
my $warn_val = 1; # Default - override with -w arg
my $crit_val = 2; # Default - override with -c arg
my $help_val = 0; # Off unless -h arg
my $verb_val = 0; # Off unless -v arg
my $vers_val = 0; # Off unless -V arg
my ($msg, $rev_word, $rr, $status, $status_print);
# Gives us a way to print out verbose debug information to the screen when user
# passes in a -v argument.
# print_debug() should receive one parameter: a text string to print out.
sub print_debug() {
my $message = shift;
if ($verb_val == 1) {
print "DEBUG: " . $message . "\n";
}
}
# Looks up and returns the current CVD version information from
# clamav.net.
sub lookup_current() {
my $res = Net::DNS::Resolver->new;
my $query = $res->search("current.cvd.clamav.net", "TXT");
if ($query) {
foreach $rr (grep { $_->type eq 'TXT' } $query->answer) {
&print_debug("Net::DNS found result: (TXT) " . $rr->txtdata);
return $rr->txtdata;
}
} else {
warn "query failed: ", $res->errorstring, "\n";
}
}
# comp_sig_ver() should receive three parameters: remote signature database
# version, local signature database version, and build date of local
# signatures database.
sub comp_sig_ver() {
my $sig_rem = shift;
my $sig_local = shift;
my $sig_date = shift;
my $diff = 0;
my $msg = "";
if ($sig_local != $sig_rem) {
$diff = $sig_rem - $sig_local;
$rev_word = ($diff == 1) ? "revision" : "revisions";
if ($diff >= $crit_val) {
&print_debug("Installed daily.cvd is behind clamav.net");
$status = $ERRORS{'CRITICAL'}; # Will exit with CRITICAL status
$status_print = "CRITICAL";
} elsif ($diff >= $warn_val) {
&print_debug("Installed daily.cvd is behind clamav.net");
$status = $ERRORS{'WARNING'}; # Will exit with WARNING status
$status_print = "WARNING";
} else {
&print_debug("Installed daily.cvd is behind clamav.net");
$status = $ERRORS{'OK'}; # Will exit with OK status
$status_print = "OK";
}
$msg = "ClamAV " . $status_print . ": daily.cvd " . $sig_local .
" out of date by " . $diff . " " . $rev_word;
} else {
&print_debug("Installed daily.cvd matches latest from clamav.net");
$status = $ERRORS{'OK'}; # Will exit with OK status
$msg = "ClamAV OK: daily.cvd " . $sig_local . " (" . $sig_date .
") is up to date";
}
return $msg, $status;
}
# Show usage information
sub show_help() {
print <<END;
$prog_name Nagios plugin $prog_ver (c) 2005-2008 Darren Spruell <phatbuckett\@gmail.com>
Perl Check ClamAV daily.cvd plugin for Nagios
Usage: $prog_name [-w <warn>] [-c <crit>] [-V] [-v] [-h]
-w, --warning=INTEGER
Number of revisions behind current daily.cvd to generate a warning state (Default: 1)
-c, --critical=INTEGER
Number of revisions behind current daily.cvd to generate a critical state (Default: 2)
-V, --version
Output version information for the plugin
-v, --verbose
Enable verbose output
-h, --help
Show this help
END
}
GetOptions (
"w=i" => \$warn_val, "warning=i" => \$warn_val,
"c=i" => \$crit_val, "critical=i" => \$crit_val,
"h" => \$help_val, "help" => \$help_val,
"V" => \$vers_val, "version" => \$vers_val,
"v" => \$verb_val, "verbose" => \$verb_val,
);
if ($help_val != 0) {
&show_help;
exit $ERRORS{'OK'};
}
if ($vers_val != 0) {
&print_revision($prog_name,$prog_ver);
exit $ERRORS{'OK'};
}
# Make sure the binary exists.
if (-x $clamscan_cmd) {
&print_debug("Found clamscan at $clamscan_cmd");
} else {
&print_debug("Can't execute clamscan at $clamscan_cmd");
die("FATAL: Unable to execute $clamscan_cmd");
}
&print_debug("Threshhold values: warning=$warn_val, critical=$crit_val");
# Should return something like: ClamAV 0.87.1/1205/Wed Dec 7 07:00:48 2005
chomp(my $clamscan_ver = `$clamscan_cmd -V`);
# Should return something like: 0.87.1:34:1206:1134072033:1
chomp(my $dnstxt_ver = &lookup_current());
# Parse what we get from clamscan -V and our DNS query
my @clamscanresults = split(/\//,$clamscan_ver);
my @txtresults = split(/:/,$dnstxt_ver);
# Get the currently running ClamAV sig level and cvd date out of this
my $local_latest_daily = $clamscanresults[1];
my $local_latest_date = $clamscanresults[2];
&print_debug("Local daily.cvd dated $local_latest_date");
&print_debug("Local daily.cvd version = $local_latest_daily");
# Get the latest ClamAV daily signatures version out of this
my $clamav_latest_daily = $txtresults[2];
&print_debug("Latest daily.cvd version = $clamav_latest_daily");
my @prog_sig_res = &comp_sig_ver($clamav_latest_daily, $local_latest_daily,
$local_latest_date);
print $prog_sig_res[0] . "\n";
exit $prog_sig_res[1];
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