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#!/usr/bin/perl -Tw
# nagios check for debian (security) updates,
# based on net-snmp glue to security updates via apt-get.
# Copyright (C) 2004 SILVER SERVER Gmbh
# Copyright (C) 2004 Peter Palfrader
#
# 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
use strict;
use English;
use Getopt::Long;
$ENV{'PATH'} = '/bin:/sbin:/usr/bin:/usr/sbin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
my $VERSION = '0.0.1';
my $APT = '/usr/bin/apt-get';
my $USE_SUDO = 1;
my $params;
# nagios exit codes
my $OK = 0;
my $WARNING = 1;
my $CRITICAL = 2;
my $UNKNOWN = 3;
$params->{'chroots'} = [];
Getopt::Long::config('bundling');
if (!GetOptions (
'--help' => \$params->{'help'},
'--version' => \$params->{'version'},
'--sudo' => \$params->{'sudo'},
'--nosudo' => \$params->{'nosudo'},
'--verbose' => \$params->{'verbose'},
'--chroot=s' => $params->{'chroots'},
)) {
die ("$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--sudo|--nosudo] [--verbose]\n");
};
if ($params->{'help'}) {
print "$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--sudo|--nosudo] [--verbose]\n";
print "Reports packages to upgrade, updating the list if necessary.\n";
print "\n";
print " --help Print this short help.\n";
print " --version Report version number.\n";
print " --sudo Use sudo to call apt-get (default).\n";
print " --nosudo Do not use sudo to call apt-get.\n";
print " --verbose Be a little verbose.\n";
exit (0);
};
if ($params->{'version'}) {
print "nagios-check-apt-updates $VERSION\n";
print "nagios check for availability of debian (security) updates\n";
print "Copyright (c) 2004 SILVER SERVER Gmbh\n";
print "Copyright (c) 2004 Peter Palfrader <peter\@palfrader.org>\n";
exit (0);
};
if ($params->{'sudo'} && $params->{'nosudo'}) {
die ("$PROGRAM_NAME: --sudo and --nosudo are mutually exclusive.\n");
};
if ($params->{'sudo'}) {
$USE_SUDO = 1;
};
if ($params->{'nosudo'}) {
$USE_SUDO = 0;
};
if (scalar @{$params->{'chroots'}} == 0) {
$params->{'chroots'} = ['/'];
};
$SIG{'__DIE__'} = sub {
print STDERR @_;
exit $UNKNOWN;
};
# Make sure chroot paths are nice;
my @chroots = ();
for my $root (@{$params->{'chroots'}}) {
if ($root =~ m#^(/[a-zA-Z0-9/.-]*)$#) {
push @chroots, $1;
} else {
die ("Chroot path $root is not nice.\n");
};
};
my @updates_security;
my @updates_other;
for my $root (@chroots) {
my $pre_command = ($root ne '/') ? "chroot $root " : '';
$pre_command = ($USE_SUDO ? 'sudo ' : '').$pre_command;
print STDERR "Running $APT update in $root\n" if $params->{'verbose'};
open (UPDATE, "$pre_command$APT update|") or die ("Cannot run $APT update in $root: $!\n");
my @ignore=<UPDATE>;
close UPDATE;
if ($CHILD_ERROR) { # program failed
die("$APT update returned with non-zero exit code in $root: ".($CHILD_ERROR / 256)."\n");
};
print STDERR "Running $APT --simulate upgrade | sort -u in $root\n" if $params->{'verbose'};
open (TODO, "$pre_command$APT --simulate upgrade | sort -u |") or die ("Cannot run $APT --simulate upgrade | sort -u in $root: $!\n");
my @lines=<TODO>;
close TODO;
if ($CHILD_ERROR) { # program failed
die("$APT --simulate upgrade | sort -u returned with non-zero exit code in $root: ".($CHILD_ERROR / 256)."\n");
};
print STDERR "Processing information for $root\n" if $params->{'verbose'};
for my $line (@lines) {
if ($line =~ m/^Inst\s+(\S+)\s+/) {
my $package = $1;
if ($line =~ m/^Inst\s+\S+\s+.*security/i) {
push @updates_security, $package.($root ne '/' ? "($root)" : '');
} else {
push @updates_other, $package.($root ne '/' ? "($root)" : '');
};
}
}
};
my $exit = $OK;
my $updateinfo;
if (@updates_security) {
$updateinfo .= 'Security updates ('.(scalar @updates_security).'): '.join(', ', @updates_security)."; ";
$exit = $CRITICAL;
};
if (@updates_other) {
$updateinfo .= 'Other Updates ('.(scalar @updates_other).'): '.join(', ', @updates_other)."; ";
};
$updateinfo = 'No updates available' unless defined $updateinfo;
print $updateinfo,"\n";
exit $exit;
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