mirror of
https://github.com/pragma-/pbot.git
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243 lines
8.4 KiB
Perl
243 lines
8.4 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 POSIX qw(WNOHANG); # for children process reaping
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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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# 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}, undef, 2, 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}, $stuff->{arguments});
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$stuff->{arguments} = quotemeta $stuff->{arguments};
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if ($stuff->{special} eq 'code-factoid' or exists $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{unquote_spaces}) {
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$stuff->{arguments} =~ s/\\ / /g;
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}
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if (exists $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{modulelauncher_subpattern}) {
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if ($self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{modulelauncher_subpattern} =~ m/s\/(.*?)\/(.*)\/(.*)/) {
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my ($p1, $p2, $p3) = ($1, $2, $3);
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my ($a, $b, $c, $d, $e, $f, $g, $h, $i, $before, $after);
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if($p3 eq 'g') {
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$stuff->{arguments} =~ s/$p1/$p2/g;
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($a, $b, $c, $d, $e, $f, $g, $h, $i, $before, $after) = ($1, $2, $3, $4, $5, $6, $7, $8, $9, $`, $');
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} else {
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$stuff->{arguments} =~ s/$p1/$p2/;
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($a, $b, $c, $d, $e, $f, $g, $h, $i, $before, $after) = ($1, $2, $3, $4, $5, $6, $7, $8, $9, $`, $');
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}
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$stuff->{arguments} =~ s/\$1/$a/g if defined $a;
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$stuff->{arguments} =~ s/\$2/$b/g if defined $b;
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$stuff->{arguments} =~ s/\$3/$c/g if defined $c;
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$stuff->{arguments} =~ s/\$4/$d/g if defined $d;
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$stuff->{arguments} =~ s/\$5/$e/g if defined $e;
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$stuff->{arguments} =~ s/\$6/$f/g if defined $f;
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$stuff->{arguments} =~ s/\$7/$g/g if defined $g;
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$stuff->{arguments} =~ s/\$8/$h/g if defined $h;
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$stuff->{arguments} =~ s/\$9/$i/g if defined $i;
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$stuff->{arguments} =~ s/\$`/$before/g if defined $before;
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$stuff->{arguments} =~ s/\$'/$after/g if defined $after;
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} else {
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$self->{pbot}->{logger}->log("Invalid module substitution pattern [" . $self->{pbot}->{factoids}->{factoids}->hash->{$channel}->{$trigger}->{modulelauncher_subpattern}. "], ignoring.\n");
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}
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}
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my $argsbuf = $self->{arguments};
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$self->{arguments} = "";
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my $lr;
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while(1) {
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my ($e, $r, $p) = extract_delimited($argsbuf, "'", "[^']+");
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$lr = $r if not defined $lr;
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if(defined $e) {
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$e =~ s/\\([^\w])/$1/g;
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$e =~ s/'/'\\''/g;
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$e =~ s/^'\\''/'/;
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$e =~ s/'\\''$/'/;
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$stuff->{arguments} .= $p;
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$stuff->{arguments} .= $e;
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$lr = $r;
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} else {
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$stuff->{arguments} .= $lr;
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last;
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}
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}
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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}->{$trigger}->{workdir};
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}
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$stuff->{result} = `./$module $stuff->{arguments} 2>> $module-stderr`;
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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'), 'localhost', $text, 0, 0, 0);
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}
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1;
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