#!/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'},
	'--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') {
		$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;
-1) {background:rgba(80,80,80,0.1);}
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aside#ts3remark {margin-top:4em;font-size:66%;text-align:center;font-style:italic;}


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#validate > p:nth-child(2) a {
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div#cgit {margin-bottom:2em;}
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ul.post-list li span.post-meta:after { content: ':'; }
ul.post-list li h3 {
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ul.post-list li h3 a {
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nav.blog-nav {
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}
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.post-content table {
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<link rel="stylesheet" type="text/css" href="/fonts/elusive-icons.css"/>
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<header>
	<h1>git.lirion.de</h1>
	<p>Of git, get, and gud</p>
</header>
<nav>
	<a href="//lirion.de/" title="home"><span>lirion.de</span></a>
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<a href='/dotfiles/about/?h=v1.9.1'>about</a><a href='/dotfiles/?h=v1.9.1'>summary</a><a href='/dotfiles/refs/?h=v1.9.1&amp;id=b1d68027a6c0ee7f845487697aaaa2f3f7324d64'>refs</a><a href='/dotfiles/log/bin/ssh-agent-launcher?h=v1.9.1'>log</a><a class='active' href='/dotfiles/tree/bin/ssh-agent-launcher?h=v1.9.1&amp;id=b1d68027a6c0ee7f845487697aaaa2f3f7324d64'>tree</a><a href='/dotfiles/commit/bin/ssh-agent-launcher?h=v1.9.1&amp;id=b1d68027a6c0ee7f845487697aaaa2f3f7324d64'>commit</a><a href='/dotfiles/diff/bin/ssh-agent-launcher?h=v1.9.1&amp;id=b1d68027a6c0ee7f845487697aaaa2f3f7324d64'>diff</a><a href='/dotfiles/stats/bin/ssh-agent-launcher?h=v1.9.1'>stats</a></td><td class='form'><form class='right' method='get' action='/dotfiles/log/bin/ssh-agent-launcher'>
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<option value='author'>author</option>
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</select>
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