/usr/lib/xymon/client/ext/libs is in hobbit-plugins 20170219.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# Copyright (C) 2005, 2006, 2007, 2008 Peter Palfrader <peter@palfrader.org>
# Porting to hobbit Copyright (C) 2007 Christoph Berg <myon@debian.org>
# Copyright (C) 2011-2014 Axel Beckert <abe@debian.org>
# Copyright (C) 2014 Elmar Heeb <elmar@heebs.ch>
#
# 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 Hobbit;
use YAML::Tiny;
use POSIX qw(uname);
use Sort::Naturally qw(nsort);
$ENV{'PATH'} = '/bin:/sbin:/usr/bin:/usr/sbin';
delete @ENV{'IFS', 'CDPATH', 'ENV', 'BASH_ENV'};
my $LSOF = '/usr/bin/lsof';
my $LSOF_OPTIONS = '-n -FpcLfn0';
my $SUDO = '/usr/bin/sudo';
my @CONFIG = qw(/etc/xymon/libs.yaml /etc/xymon/libs.local.yaml);
my $bb = new Hobbit ('libs');
################### To permit exceptions
our %whitelist = ();
for my $filename (@CONFIG) {
if ( -f $filename ) {
my $config_yaml = YAML::Tiny->read($filename);
my $whitelist_cfg = $config_yaml->[0]{whitelist};
foreach my $key (keys %{$whitelist_cfg}) {
$whitelist{$key} ||= [];
push(@{$whitelist{$key}}, @{$whitelist_cfg->{$key}});
}
}
}
################### Kernel
my @running_kernel_uname = POSIX::uname();
my $running_kernel_release = $running_kernel_uname[2];
my $running_kernel_version = $running_kernel_uname[3];
my ($newest_kernel_image) = reverse nsort glob('/boot/vmlinuz-*');
if ($newest_kernel_image) {
$newest_kernel_image =~ /vmlinu[xz]-(.*)$/;
my $kernel_image_release = $1;
my $kernel_image_read_command = "strings '$newest_kernel_image'";
if (`dpkg --print-architecture` =~ /sparc/) {
$kernel_image_read_command = "zcat '$newest_kernel_image' | strings";
}
$kernel_image_read_command .=
" | egrep '^$kernel_image_release|^Linux version '";
my $fork_successful = open(my $pipe, '-|', $kernel_image_read_command);
unless ($fork_successful) {
$bb->color_line('yellow',
"Couldn't fork $kernel_image_read_command: $!\n\n");
} else {
my $kernel_image_version = <$pipe>;
chomp($kernel_image_version) if defined $kernel_image_version;
my $exit_code = close($pipe);
unless ($exit_code) {
if (!-r $newest_kernel_image) {
$bb->color_line('yellow',
"Kernel image $newest_kernel_image unreadable. ".
"Can't check kernel version!\n".
'See comment #3 on '.
'<a href="https://bugs.launchpad.net/bugs/759725"'.
'>https://bugs.launchpad.net/bugs/759725</a> '.
"for details and a permanent workaround.\n\n");
} elsif (!-x '/usr/bin/strings') {
$bb->color_line('yellow',
'"strings" from package "binutils" not found.'.
" Can't check kernel version!\n\n");
} else {
$bb->color_line('yellow',
"Couldn't check for string '$kernel_image_release' in ".
"$newest_kernel_image. Can't check kernel version!\n\n");
}
} else {
if ($kernel_image_version =~ /^(Linux version )?\Q$running_kernel_release\E \(.*\) \Q$running_kernel_version\E$/) {
$bb->color_line('green',
sprintf("Newest kernel is running: %s, version %s\n\n",
$running_kernel_release,
$running_kernel_version));
} else {
$kernel_image_version =~ s/ \(\S*\) /, version /;
$kernel_image_version =~ s/^Linux version //;
$bb->color_line ('yellow',
"Machine should be rebooted. Running not the newest installed kernel:\n\n".
sprintf(" Running kernel: %s, version %s\n",
$running_kernel_release,
$running_kernel_version).
sprintf(" Newest installed kernel: %s\n\n",
$kernel_image_version));
}
}
}
} else {
$bb->color_line ('clear', "No kernel found, hence none checked.\n");
}
###################
my %processes;
sub getPIDs($$) {
my ($user, $process) = @_;
return join(' ', sort keys %{ $processes{$user}->{$process} });
};
sub getProcs($) {
my ($user) = @_;
return join("\n", map { " $_ (".getPIDs($user, $_).')' } (sort {$a cmp $b} keys %{ $processes{$user} }));
};
sub getUsers() {
return join("\n", (map { "$_:\n".getProcs($_) } (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();
if (!-x $SUDO or !-x $LSOF) {
$bb->color_line ('clear',
"$SUDO and/or $LSOF not found or not executable.
This library check needs lsof to be run with root rights. See the file
/etc/sudoers.d/xymon for how lsof would be run with root rights via
sudo.
");
$bb->send;
exit 0
}
if (!-e '/etc/sudoers.d/README') {
$bb->color_line ('yellow',
"sudo seems to be installed, but an older version without support for files in /etc/sudoers.d/.
Please add the contents of /etc/sudoers.d/xymon to /etc/sudoers
and create /etc/sudoers.d/README to disable this warning:
cat /etc/sudoers.d/xymon >> /etc/sudoers
echo See /usr/lib/xymon/client/ext/libs >> /etc/sudoers.d/README
");
}
my $lsof_cmd;
unless (open($lsof_cmd, '-|', "$SUDO $LSOF $LSOF_OPTIONS 2> /dev/null")) {
$bb->color_line ('red', "Cannot run $LSOF $LSOF_OPTIONS: $OS_ERROR\n");
$bb->send;
exit;
}
{
my ($process, $pid, $user, $fd, $path, $rest);
while (my $line = <$lsof_cmd>) {
my %params = %{_split_lsof_fields($line)};
if ($line =~ m{\Ap}xms) {
($pid, $process, $user) = ($params{p}, $params{c}, $params{L});
next;
}
elsif ($line =~ m{\Af}xms) {
($fd, $path) = ($params{f}, $params{n});
if ($fd eq 'txt') { # 'txt' indicates executable path
next if ($path =~ m{\A/proc/}xms); # kernel processes
$process = $path; # path more specific than process name
}
next if $fd eq 'cwd';
if ($path =~ m{\.dpkg-} || $path =~ m{path inode=} || $path =~ m{\s\(deleted\)} || $fd eq 'DEL') {
next if _is_whitelisted($path, $process);
next if ($INVSERVER && ($process eq 'init') && ($pid == 1) && ($user eq 'root'));
$processes{$user}->{$process}->{$pid} = 1;
}
}
}
}
close $lsof_cmd;
if ($CHILD_ERROR) { # program failed
$bb->color_line ('red', "$LSOF $LSOF_OPTIONS returned with non-zero exit code: ".($CHILD_ERROR / 256)."\n");
$bb->send;
exit;
};
sub _is_whitelisted {
my ($path, $process) = @_;
foreach my $proc_name (keys %whitelist) {
if (($proc_name eq '*' ) or ($proc_name eq $process)) {
foreach my $regexp (@{$whitelist{$proc_name}}) {
return 1 if $path =~ $regexp;
}
}
}
return 0;
}
sub _split_lsof_fields {
my ($lsof_line) = @_;
chomp $lsof_line;
my $params_href = {};
foreach my $option (split("\0", $lsof_line)) {
my ($key, $value) = ($option =~ m{(.)(.*)}xms);
$params_href->{$key} = $value;
}
return $params_href;
}
if (keys %processes) {
$bb->color_line ('yellow', "The following processes have libs linked that were upgraded:\n\n". getUsers() . "\n");
} else {
$bb->color_line ('green', "No upgraded libs linked in running processes\n");
};
$bb->add_color ('green');
$bb->send;
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