335 lines
10 KiB
Perl
335 lines
10 KiB
Perl
#
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# Copyright 2016 Centreon (http://www.centreon.com/)
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#
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# Centreon is a full-fledged industry-strength solution that meets
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# the needs in IT infrastructure and application monitoring for
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# service performance.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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package centreon::plugins::script;
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use strict;
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use warnings;
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use centreon::plugins::output;
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use centreon::plugins::misc;
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use FindBin;
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use Pod::Usage;
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use Pod::Find qw(pod_where);
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my %handlers = (DIE => {});
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my $global_version = 20160220;
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my $alternative_fatpacker = 0;
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sub new {
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my $class = shift;
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my $self = {};
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bless $self, $class;
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$self->{options} = undef;
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$self->{plugin} = undef;
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$self->{help} = undef;
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# Avoid to destroy because it keeps a ref on the object.
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# A problem if we execute it multiple times in the same perl execution
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# Use prepare_destroy
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$self->set_signal_handlers;
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return $self;
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}
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sub prepare_destroy {
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my $self = shift;
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delete $handlers{DIE}->{$self};
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}
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sub set_signal_handlers {
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my $self = shift;
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$SIG{__DIE__} = \&class_handle_DIE;
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$handlers{DIE}->{$self} = sub { $self->handle_DIE($_[0]) };
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}
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sub class_handle_DIE {
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my ($msg) = @_;
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foreach (keys %{$handlers{DIE}}) {
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&{$handlers{DIE}->{$_}}($msg);
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}
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}
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sub handle_DIE {
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my ($self, $msg) = @_;
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return unless defined $^S and $^S == 0; # Ignore errors in eval
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$self->{output}->add_option_msg(short_msg => $msg);
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$self->{output}->die_exit();
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}
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sub get_plugin {
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my $self = shift;
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######
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# Need to load global 'Output' and 'Options'
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######
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if ($alternative_fatpacker == 0) {
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require centreon::plugins::options;
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$self->{options} = centreon::plugins::options->new();
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} else {
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require centreon::plugins::alternative::FatPackerOptions;
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$self->{options} = centreon::plugins::alternative::FatPackerOptions->new();
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}
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$self->{output} = centreon::plugins::output->new(options => $self->{options});
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$self->{options}->set_output(output => $self->{output});
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$self->{options}->add_options(arguments => {
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'plugin:s' => { name => 'plugin' },
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'list-plugin' => { name => 'list_plugin' },
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'help' => { name => 'help' },
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'ignore-warn-msg' => { name => 'ignore_warn_msg' },
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'version' => { name => 'version' },
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'runas:s' => { name => 'runas' },
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'environment:s%' => { name => 'environment' },
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} );
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$self->{options}->parse_options();
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$self->{plugin} = $self->{options}->get_option(argument => 'plugin' );
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$self->{list_plugin} = $self->{options}->get_option(argument => 'list_plugin' );
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$self->{help} = $self->{options}->get_option(argument => 'help' );
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$self->{version} = $self->{options}->get_option(argument => 'version' );
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$self->{runas} = $self->{options}->get_option(argument => 'runas' );
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$self->{environment} = $self->{options}->get_option(argument => 'environment' );
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$self->{ignore_warn_msg} = $self->{options}->get_option(argument => 'ignore_warn_msg' );
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$self->{output}->mode(name => $self->{mode});
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$self->{output}->plugin(name => $self->{plugin});
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$self->{output}->check_options(option_results => $self->{options}->get_options());
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$self->{options}->clean();
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}
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sub display_local_help {
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my $self = shift;
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my $stdout;
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if ($self->{help}) {
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local *STDOUT;
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open STDOUT, '>', \$stdout;
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if ($alternative_fatpacker == 0) {
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pod2usage(-exitval => "NOEXIT", -input => pod_where({-inc => 1}, __PACKAGE__));
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} else {
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my $pp = __PACKAGE__ . ".pm";
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$pp =~ s{::}{/}g;
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my $content_class = $INC{$pp}->{$pp};
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open my $str_fh, '<', \$content_class;
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pod2usage(-exitval => "NOEXIT", -input => $str_fh);
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close $str_fh;
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}
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}
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$self->{output}->add_option_msg(long_msg => $stdout) if (defined($stdout));
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}
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sub check_directory {
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my ($self, $directory) = @_;
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opendir(my $dh, $directory) || return ;
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while (my $filename = readdir $dh) {
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$self->check_directory($directory . "/" . $filename) if ($filename !~ /^\./ && -d $directory . "/" . $filename);
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if ($filename eq 'plugin.pm') {
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my $stdout = '';
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{
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local *STDOUT;
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open STDOUT, '>', \$stdout;
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pod2usage(-exitval => 'NOEXIT', -input => $directory . "/" . $filename,
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-verbose => 99,
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-sections => "PLUGIN DESCRIPTION");
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}
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$self->{plugins_result}->{$directory . "/" . $filename} = $stdout;
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}
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}
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closedir $dh;
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}
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sub display_list_plugin {
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my $self = shift;
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$self->{plugins_result} = {};
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# Search file 'plugin.pm'
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$self->check_directory($FindBin::Bin);
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foreach my $key (keys %{$self->{plugins_result}}) {
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my $name = $key;
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$name =~ s/^$FindBin::Bin\/(.*)\.pm/$1/;
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$name =~ s/\//::/g;
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$self->{plugins_result}->{$key} =~ s/^Plugin Description/DESCRIPTION/i;
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$self->{output}->add_option_msg(long_msg => '-----------------');
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$self->{output}->add_option_msg(long_msg => 'PLUGIN: ' . $name);
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$self->{output}->add_option_msg(long_msg => $self->{plugins_result}->{$key});
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}
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}
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sub check_relaunch {
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my $self = shift;
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my $need_restart = 0;
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my $cmd = $FindBin::Bin . "/" . $FindBin::Script;
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my @args = ();
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if (defined($self->{environment})) {
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foreach (keys %{$self->{environment}}) {
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if ($_ ne '' && (!defined($ENV{$_}) || $ENV{$_} ne $self->{environment}->{$_})) {
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$ENV{$_} = $self->{environment}->{$_};
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$need_restart = 1;
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}
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}
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}
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if (defined($self->{runas}) && $self->{runas} ne '') {
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# Check if it's already me and user exist ;)
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my ($name, $passwd, $uid) = getpwnam($self->{runas});
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if (!defined($uid)) {
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$self->{output}->add_option_msg(short_msg => "Runas user '" . $self->{runas} . "' not exist.");
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$self->{output}->option_exit();
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}
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if ($uid != $>) {
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if ($> == 0) {
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unshift @args, "-s", "/bin/bash", "-l", $self->{runas}, "-c", join(" ", $cmd, "--plugin=" . $self->{plugin}, @ARGV);
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$cmd = "su";
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} else {
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unshift @args, "-S", "-u", $self->{runas}, $cmd, "--plugin=" . $self->{plugin}, @ARGV;
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$cmd = "sudo";
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}
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$need_restart = 1;
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}
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}
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if ($need_restart == 1) {
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if (scalar(@args) <= 0) {
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unshift @args, @ARGV, "--plugin=" . $self->{plugin}
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}
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my ($lerror, $stdout, $exit_code) = centreon::plugins::misc::backtick(
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command => $cmd,
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arguments => [@args],
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timeout => 30,
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wait_exit => 1
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);
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if ($exit_code <= -1000) {
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if ($exit_code == -1000) {
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$self->{output}->output_add(severity => 'UNKNOWN',
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short_msg => $stdout);
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}
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$self->{output}->display();
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$self->{output}->exit();
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}
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print $stdout;
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# We put unknown
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if (!($exit_code >= 0 && $exit_code <= 4)) {
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exit 3;
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}
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exit $exit_code;
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}
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}
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sub run {
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my $self = shift;
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$self->get_plugin();
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if (defined($self->{help}) && !defined($self->{plugin})) {
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$self->display_local_help();
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$self->{output}->option_exit();
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}
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if (defined($self->{list_plugin})) {
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$self->display_list_plugin();
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$self->{output}->option_exit();
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}
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if (!defined($self->{plugin}) || $self->{plugin} eq '') {
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if (defined($self->{version})) {
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$self->{output}->add_option_msg(short_msg => "Global Version: " . $global_version);
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$self->{output}->option_exit(nolabel => 1);
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}
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$self->{output}->add_option_msg(short_msg => "Need to specify '--plugin' option.");
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$self->{output}->option_exit();
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}
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if (defined($self->{ignore_warn_msg})) {
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$SIG{__WARN__} = sub {};
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}
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$self->check_relaunch();
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centreon::plugins::misc::mymodule_load(output => $self->{output}, module => $self->{plugin},
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error_msg => "Cannot load module --plugin.");
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my $plugin = $self->{plugin}->new(options => $self->{options}, output => $self->{output});
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$plugin->init(help => $self->{help},
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version => $self->{version});
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$plugin->run();
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}
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1;
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__END__
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=head1 NAME
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centreon_plugins.pl - main program to call Centreon plugins.
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=head1 SYNOPSIS
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centreon_plugins.pl [options]
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=head1 OPTIONS
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=over 8
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=item B<--plugin>
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Specify the path to the plugin.
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=item B<--list-plugin>
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Print available plugins.
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=item B<--version>
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Print global version.
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=item B<--help>
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Print a brief help message and exits.
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=item B<--ignore-warn-msg>
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Perl warn messages are ignored (not displayed).
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=item B<--runas>
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Run the script as a different user (prefer to use directly the good user).
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=item B<--environment>
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Set environment variables for the script (prefer to set it before running it for better performance).
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=back
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=head1 DESCRIPTION
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B<centreon_plugins.pl> .
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=cut
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