#!/usr/bin/perl -w # Copyright (C) 2005, 2006, 2007, 2008, 2012, 2015 Peter Palfrader <peter@palfrader.org> # 2012 Uli Martens <uli@youam.net> # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. use strict; use English; use Getopt::Long; $ENV{'PATH'} = '/bin:/sbin:/usr/bin:/usr/sbin'; delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'}; my $LSOF = '/usr/bin/lsof -F0'; my $VERSION = '0.2015012901'; # nagios exit codes my $OK = 0; my $WARNING = 1; my $CRITICAL = 2; my $UNKNOWN = 3; my $params; my $config; Getopt::Long::config('bundling'); sub dief { print STDERR @_; exit $UNKNOWN; } if (!GetOptions ( '--help' => \$params->{'help'}, '--version' => \$params->{'version'}, '--quiet' => \$params->{'quiet'}, '--verbose' => \$params->{'verbose'}, '-v' => \$params->{'verbose'}, '--config=s' => \$params->{'config'}, )) { dief ("$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n"); }; if ($params->{'help'}) { print "$PROGRAM_NAME: Usage: $PROGRAM_NAME [--help|--version] [--verbose] [--quiet] [--config=<CONFIGFILE>]\n"; print "Reports processes that are linked against libraries that no longer exist.\n"; print "The optional config file can specify ignore rules - see the sample config file.\n"; exit (0); }; if ($params->{'version'}) { print "nagios-check-libs $VERSION\n"; print "nagios check for availability of debian (security) updates\n"; print "Copyright (c) 2005, 2006, 2007, 2008, 2012 Peter Palfrader <peter\@palfrader.org>\n"; exit (0); }; if (! defined $params->{'config'}) { $params->{'config'} = '/etc/nagios/check-libs.conf'; } elsif (! -e $params->{'config'}) { dief("Config file $params->{'config'} does not exist.\n"); } if (-e $params->{'config'}) { eval "use YAML::Syck; 1" or dief "you need YAML::Syck (libyaml-syck-perl) to load a config file"; open(my $fh, '<', $params->{'config'}) or dief "Cannot open config file $params->{'config'}: $!"; $config = LoadFile($fh); close($fh); if (!(ref($config) eq "HASH")) { dief("Loaded config is not a hash!\n"); } } else { $config = { 'ignorelist' => [ '$path =~ m#^/proc/#', '$path =~ m#^/var/tmp/#', '$path =~ m#^/SYS#', '$path =~ m#^/drm$# # xserver stuff', '$path =~ m#^/dev/zero#', '$path =~ m#^/dev/shm/#', ] }; } if (! exists $config->{'ignorelist'}) { $config->{'ignorelist'} = []; } elsif (! (ref($config->{'ignorelist'}) eq 'ARRAY')) { dief("Config->ignorelist is not an array!\n"); } my %processes; sub getPIDs($$) { my ($user, $process) = @_; return join(', ', sort keys %{ $processes{$user}->{$process} }); }; sub getProcs($) { my ($user) = @_; return join(', ', map { $_.' ('.getPIDs($user, $_).')' } (sort {$a cmp $b} keys %{ $processes{$user} })); }; sub getUsers() { return join('; ', (map { $_.': '.getProcs($_) } (sort {$a cmp $b} keys %processes))); }; sub inVserver() { my ($f, $key); if (-e "/proc/self/vinfo" ) { $f = "/proc/self/vinfo"; $key = "XID"; } else { $f = "/proc/self/status"; $key = "s_context"; }; open(F, "< $f") or return 0; while (<F>) { my ($k, $v) = split(/: */, $_, 2); if ($k eq $key) { close F; return ($v > 0); }; }; close F; return 0; } my $INVSERVER = inVserver(); print STDERR "Running $LSOF -n\n" if $params->{'verbose'}; open (LSOF, "$LSOF -n|") or dief ("Cannot run $LSOF -n: $!\n"); my @lsof=<LSOF>; close LSOF; if ($CHILD_ERROR) { # program failed dief("$LSOF -n returned with non-zero exit code: ".($CHILD_ERROR / 256)."\n"); }; my ($process, $pid, $user); LINE: for my $line (@lsof) { if ( $line =~ /^p/ ) { my %fields = map { m/^(.)(.*)$/ ; $1 => $2 } grep { defined $_ and length $_ >1} split /\0/, $line; $process = $fields{c}; $pid = $fields{p}; $user = $fields{L}; next; } unless ( $line =~ /^f/ ) { dief("UNKNOWN strange line read from lsof\n"); # don't print it because it contains NULL characters... } my %fields = map { m/^(.)(.*)$/ ; $1 => $2 } grep { defined $_ and length $_ >1} split /\0/, $line; my $fd = $fields{f}; my $inode = $fields{i}; my $path = $fields{n}; if ($path =~ m/\.dpkg-/ || $path =~ m/\(deleted\)/ || $path =~ /path inode=/ || $path =~ m#/\.nfs# || $fd eq 'DEL') { my $deleted_in_path = ($path =~ m/\(deleted\)/ || $path =~ m/\.nfs/); next if ($deleted_in_path && $fd =~ /^[0-9]*$/); # Ignore deleted files that are open via normal file handles. next if ($deleted_in_path && $fd eq 'cwd'); # Ignore deleted directories that we happen to be in. $path =~ s/^\(deleted\)//; # in some cases "(deleted)" is at the beginning of the string for my $i (@{$config->{'ignorelist'}}) { my $ignore = eval($i); next LINE if $ignore; } next if ($INVSERVER && ($process eq 'init') && ($pid == 1) && ($user eq 'root')); if ( $params->{'verbose'} ) { print STDERR "adding $process($pid) because of [$path]:\n"; print STDERR $line; } $processes{$user}->{$process}->{$pid} = 1; }; }; my $message=''; my $exit = $OK; if (keys %processes) { $exit = $WARNING; $message = 'The following processes have libs linked that were upgraded: '. getUsers()."\n"; } else { $message = "No upgraded libs linked in running processes\n" unless $params->{'quiet'}; }; print $message; exit $exit;