mirror of
https://github.com/pragma-/pbot.git
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225 lines
7.2 KiB
Perl
225 lines
7.2 KiB
Perl
# File: FactoidModuleLauncher.pm
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# Author: pragma_
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#
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# Purpose: Handles forking and execution of module processes
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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package PBot::FactoidModuleLauncher;
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use warnings;
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use strict;
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use feature 'unicode_strings';
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use POSIX qw(WNOHANG);
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use Carp ();
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use Text::Balanced qw(extract_delimited);
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use JSON;
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use IPC::Run qw/run timeout/;
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use Encode;
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# automatically reap children processes in background
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$SIG{CHLD} = sub { while (waitpid(-1, WNOHANG) > 0) {} };
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sub new {
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if (ref($_[1]) eq 'HASH') {
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Carp::croak("Options to Commands should be key/value pairs, not hash reference");
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}
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my ($class, %conf) = @_;
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my $self = bless {}, $class;
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$self->initialize(%conf);
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return $self;
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}
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sub initialize {
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my ($self, %conf) = @_;
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my $pbot = delete $conf{pbot};
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if (not defined $pbot) {
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Carp::croak("Missing pbot reference to PBot::FactoidModuleLauncher");
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}
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$self->{pbot} = $pbot;
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}
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sub execute_module {
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my ($self, $stuff) = @_;
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my $text;
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if ($self->{pbot}->{registry}->get_value('general', 'debugcontext')) {
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use Data::Dumper;
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$Data::Dumper::Sortkeys = 1;
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$self->{pbot}->{logger}->log("FML::execute_module\n");
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$self->{pbot}->{logger}->log(Dumper $stuff);
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}
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$stuff->{arguments} = "" if not defined $stuff->{arguments};
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my @factoids = $self->{pbot}->{factoids}->find_factoid($stuff->{from}, $stuff->{keyword}, exact_channel => 2, exact_trigger => 2);
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if (not @factoids or not $factoids[0]) {
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$stuff->{checkflood} = 1;
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$self->{pbot}->{interpreter}->handle_result($stuff, "/msg $stuff->{nick} Failed to find module for '$stuff->{keyword}' in channel $stuff->{from}\n");
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return;
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}
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my ($channel, $trigger) = ($factoids[0]->[0], $factoids[0]->[1]);
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$stuff->{channel} = $channel;
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$stuff->{keyword} = $trigger;
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$stuff->{trigger} = $trigger;
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my $module = $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{action};
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my $module_dir = $self->{pbot}->{registry}->get_value('general', 'module_dir');
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$self->{pbot}->{logger}->log("(" . (defined $stuff->{from} ? $stuff->{from} : "(undef)") . "): $stuff->{nick}!$stuff->{user}\@$stuff->{host}: Executing module [$stuff->{command}] $module $stuff->{arguments}\n");
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$stuff->{arguments} = $self->{pbot}->{factoids}->expand_special_vars($stuff->{from}, $stuff->{nick}, $stuff->{root_keyword}, $stuff->{arguments});
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pipe(my $reader, my $writer);
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my $pid = fork;
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if (not defined $pid) {
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$self->{pbot}->{logger}->log("Could not fork module: $!\n");
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close $reader;
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close $writer;
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$stuff->{checkflood} = 1;
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$self->{pbot}->{interpreter}->handle_result($stuff, "/me groans loudly.\n");
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return;
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}
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# FIXME -- add check to ensure $module exists
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if ($pid == 0) { # start child block
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close $reader;
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# don't quit the IRC client when the child dies
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no warnings;
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*PBot::IRC::Connection::DESTROY = sub { return; };
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use warnings;
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if (not chdir $module_dir) {
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$self->{pbot}->{logger}->log("Could not chdir to '$module_dir': $!\n");
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Carp::croak("Could not chdir to '$module_dir': $!");
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}
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if (exists $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{workdir}) {
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chdir $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{workdir};
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}
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my ($exitval, $stdout, $stderr) = eval {
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my $args = $stuff->{arguments};
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if (not $stuff->{args_utf8}) {
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$args = encode('UTF-8', $args);
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}
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my @cmdline = ("./$module", $self->{pbot}->{interpreter}->split_line($args));
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my $timeout = $self->{pbot}->{registry}->get_value('general', 'module_timeout') // 30;
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my ($stdin, $stdout, $stderr);
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run \@cmdline, \$stdin, \$stdout, \$stderr, timeout($timeout);
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my $exitval = $? >> 8;
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utf8::decode($stdout);
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utf8::decode($stderr);
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return ($exitval, $stdout, $stderr);
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};
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if ($@) {
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my $error = $@;
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if ($error =~ m/timeout on timer/) {
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($exitval, $stdout, $stderr) = (-1, "$stuff->{trigger}: timed-out", '');
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} else {
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($exitval, $stdout, $stderr) = (-1, '', $error);
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}
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}
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if (length $stderr) {
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if (open(my $fh, '>>', "$module-stderr")) {
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print $fh $stderr;
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close $fh;
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} else {
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$self->{pbot}->{logger}->log("Failed to open $module-stderr: $!\n");
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}
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}
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$stuff->{result} = $stdout;
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chomp $stuff->{result};
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my $json = encode_json $stuff;
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print $writer "$json\n";
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exit 0;
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} # end child block
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else {
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close $writer;
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$self->{pbot}->{select_handler}->add_reader($reader, sub { $self->module_pipe_reader(@_) });
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return "";
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}
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}
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sub module_pipe_reader {
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my ($self, $buf) = @_;
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my $stuff = decode_json $buf or do {
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$self->{pbot}->{logger}->log("Failed to decode bad json: [$buf]\n");
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return;
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};
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if (not defined $stuff->{result} or not length $stuff->{result}) {
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$self->{pbot}->{logger}->log("No result from module.\n");
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return;
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}
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if ($stuff->{referenced}) {
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return if $stuff->{result} =~ m/(?:no results)/i;
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}
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if (exists $stuff->{special} and $stuff->{special} eq 'code-factoid') {
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$stuff->{result} =~ s/\s+$//g;
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$self->{pbot}->{logger}->log("No text result from code-factoid.\n") and return if not length $stuff->{result};
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$stuff->{original_keyword} = $stuff->{root_keyword};
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$stuff->{result} = $self->{pbot}->{factoids}->handle_action($stuff, $stuff->{result});
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}
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$stuff->{checkflood} = 0;
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if (defined $stuff->{nickoverride}) {
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$self->{pbot}->{interpreter}->handle_result($stuff, $stuff->{result});
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} else {
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# don't override nick if already set
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if (exists $stuff->{special} and $stuff->{special} ne 'code-factoid' and exists $self->{pbot}->{factoids}->{factoids}->hash->{$stuff->{channel}}->{$stuff->{trigger}}->{add_nick} and $self->{pbot}->{factoids}->{factoids}->hash->{$stuff->{channel}}->{$stuff->{trigger}}->{add_nick} != 0) {
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$stuff->{nickoverride} = $stuff->{nick};
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$stuff->{no_nickoverride} = 0;
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$stuff->{force_nickoverride} = 1;
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} else {
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# extract nick-like thing from module result
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if ($stuff->{result} =~ s/^(\S+): //) {
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my $nick = $1;
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if (lc $nick eq "usage") {
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# put it back on result if it's a usage message
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$stuff->{result} = "$nick: $stuff->{result}";
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} else {
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my $present = $self->{pbot}->{nicklist}->is_present($stuff->{channel}, $nick);
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if ($present) {
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# nick is present in channel
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$stuff->{nickoverride} = $present;
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} else {
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# nick not present, put it back on result
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$stuff->{result} = "$nick: $stuff->{result}";
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}
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}
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}
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}
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$self->{pbot}->{interpreter}->handle_result($stuff, $stuff->{result});
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}
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my $text = $self->{pbot}->{interpreter}->truncate_result($stuff->{channel}, $self->{pbot}->{registry}->get_value('irc', 'botnick'), 'undef', $stuff->{result}, $stuff->{result}, 0);
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$self->{pbot}->{antiflood}->check_flood($stuff->{from}, $self->{pbot}->{registry}->get_value('irc', 'botnick'), $self->{pbot}->{registry}->get_value('irc', 'username'), 'pbot', $text, 0, 0, 0);
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}
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1;
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