mirror of
https://github.com/pragma-/pbot.git
synced 2024-11-26 13:59:47 +01:00
290 lines
10 KiB
Perl
290 lines
10 KiB
Perl
# File: ProcessManager.pm
|
|
# Author: pragma_
|
|
#
|
|
# Purpose: Handles forking and execution of module/subroutine processes
|
|
|
|
# This Source Code Form is subject to the terms of the Mozilla Public
|
|
# License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
package PBot::ProcessManager;
|
|
|
|
use parent 'PBot::Class';
|
|
|
|
use warnings; use strict;
|
|
use feature 'unicode_strings';
|
|
|
|
use Time::Duration qw/concise duration/;
|
|
use Time::HiRes qw/gettimeofday/;
|
|
use Getopt::Long qw/GetOptionsFromArray/;
|
|
use POSIX qw/WNOHANG/;
|
|
use JSON;
|
|
|
|
sub initialize {
|
|
my ($self, %conf) = @_;
|
|
$self->{pbot}->{commands}->register(sub { $self->cmd_ps(@_) }, 'ps', 0);
|
|
$self->{pbot}->{commands}->register(sub { $self->cmd_kill(@_) }, 'kill', 1);
|
|
$self->{pbot}->{capabilities}->add('admin', 'can-kill', 1);
|
|
$self->{processes} = {};
|
|
|
|
# automatically reap children processes in background
|
|
$SIG{CHLD} = sub {
|
|
my $pid; do { $pid = waitpid(-1, WNOHANG); $self->remove_process($pid) if $pid > 0; } while $pid > 0;
|
|
};
|
|
}
|
|
|
|
sub cmd_ps {
|
|
my ($self, $context) = @_;
|
|
my $usage = 'Usage: ps [-atu]; -a show all information; -t show running time; -u show user/channel';
|
|
|
|
my $getopt_error;
|
|
local $SIG{__WARN__} = sub {
|
|
$getopt_error = shift;
|
|
chomp $getopt_error;
|
|
};
|
|
|
|
Getopt::Long::Configure("bundling");
|
|
|
|
my ($show_all, $show_user, $show_running_time);
|
|
my @opt_args = $self->{pbot}->{interpreter}->split_line($context->{arguments}, strip_quotes => 1);
|
|
GetOptionsFromArray(
|
|
\@opt_args,
|
|
'all|a' => \$show_all,
|
|
'user|u' => \$show_user,
|
|
'time|t' => \$show_running_time
|
|
);
|
|
return "$getopt_error; $usage" if defined $getopt_error;
|
|
|
|
my @processes;
|
|
foreach my $pid (sort keys %{$self->{processes}}) { push @processes, $self->{processes}->{$pid}; }
|
|
if (not @processes) { return "No running processes."; }
|
|
|
|
my $result;
|
|
if (@processes == 1) { $result = 'One process: '; } else { $result = @processes . ' processes: '; }
|
|
|
|
my $sep = '';
|
|
foreach my $process (@processes) {
|
|
$result .= $sep;
|
|
$result .= "$process->{pid}: $process->{commands}->[0]";
|
|
|
|
if ($show_running_time or $show_all) {
|
|
my $duration = concise duration (gettimeofday - $process->{process_start});
|
|
$result .= " [$duration]";
|
|
}
|
|
|
|
if ($show_user or $show_all) {
|
|
$result .= " ($process->{nick} in $process->{from})";
|
|
}
|
|
|
|
$sep = '; ';
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
sub cmd_kill {
|
|
my ($self, $context) = @_;
|
|
my $usage = 'Usage: kill [-a] [-t <seconds>] [-s <signal>] [pids...]; -a kill all processes; -t <seconds> kill processes running longer than <seconds>; -s send <signal> to processes';
|
|
|
|
my $getopt_error;
|
|
local $SIG{__WARN__} = sub {
|
|
$getopt_error = shift;
|
|
chomp $getopt_error;
|
|
};
|
|
|
|
Getopt::Long::Configure("bundling");
|
|
|
|
my ($kill_all, $kill_time, $signal);
|
|
my @opt_args = $self->{pbot}->{interpreter}->split_line($context->{arguments}, preserve_escapes => 1, strip_quotes => 1);
|
|
GetOptionsFromArray(
|
|
\@opt_args,
|
|
'all|a' => \$kill_all,
|
|
'time|t=i' => \$kill_time,
|
|
'signal|s=s' => \$signal,
|
|
);
|
|
return "$getopt_error; $usage" if defined $getopt_error;
|
|
return "Must specify PIDs to kill unless options -a or -t are provided." if not $kill_all and not $kill_time and not @opt_args;
|
|
|
|
if (defined $signal) {
|
|
$signal = uc $signal;
|
|
} else {
|
|
$signal = 'INT';
|
|
}
|
|
|
|
my @pids;
|
|
if (defined $kill_all or defined $kill_time) {
|
|
my $now = time;
|
|
foreach my $pid (sort keys %{$self->{processes}}) {
|
|
my $process = $self->{processes}->{$pid};
|
|
next if defined $kill_time and $now - $process->{process_start} < $kill_time;
|
|
push @pids, $pid;
|
|
}
|
|
} else {
|
|
foreach my $pid (@opt_args) {
|
|
return "No such pid $pid." if not exists $self->{processes}->{$pid};
|
|
push @pids, $pid;
|
|
}
|
|
}
|
|
return "No matching process." if not @pids;
|
|
|
|
my $ret = eval { kill $signal, @pids };
|
|
if ($@) { my $error = $@; $error =~ s/ at PBot.*//; return $error; }
|
|
return "[$ret] Sent signal " . $signal . ' to ' . join ', ', @pids;
|
|
}
|
|
|
|
sub add_process {
|
|
my ($self, $pid, $context) = @_;
|
|
$context->{process_start} = gettimeofday;
|
|
$self->{processes}->{$pid} = $context;
|
|
$self->{pbot}->{logger}->log("Starting process $pid: $context->{commands}->[0]\n");
|
|
}
|
|
|
|
sub remove_process {
|
|
my ($self, $pid) = @_;
|
|
if (exists $self->{processes}->{$pid}) {
|
|
my $command = $self->{processes}->{$pid}->{commands}->[0];
|
|
my $duration = gettimeofday - $self->{processes}->{$pid}->{process_start};
|
|
$duration = sprintf "%0.3f", $duration;
|
|
$self->{pbot}->{logger}->log("Finished process $pid ($command): duration $duration seconds\n");
|
|
delete $self->{processes}->{$pid};
|
|
} else {
|
|
$self->{pbot}->{logger}->log("Finished process $pid\n");
|
|
}
|
|
}
|
|
|
|
sub execute_process {
|
|
my ($self, $context, $subref, $timeout) = @_;
|
|
$timeout //= 30;
|
|
|
|
if (not exists $context->{commands}) { $context->{commands} = [$context->{command}]; }
|
|
|
|
# don't fork again if we're already a forked process
|
|
if (exists $context->{pid}) {
|
|
$subref->($context);
|
|
return $context->{result};
|
|
}
|
|
|
|
pipe(my $reader, my $writer);
|
|
$context->{pid} = fork;
|
|
|
|
if (not defined $context->{pid}) {
|
|
$self->{pbot}->{logger}->log("Could not fork process: $!\n");
|
|
close $reader;
|
|
close $writer;
|
|
$context->{checkflood} = 1;
|
|
$self->{pbot}->{interpreter}->handle_result($context, "/me groans loudly.\n");
|
|
return;
|
|
}
|
|
|
|
if ($context->{pid} == 0) {
|
|
# child
|
|
close $reader;
|
|
|
|
# don't quit the IRC client when the child dies
|
|
no warnings;
|
|
*PBot::IRC::Connection::DESTROY = sub { return; };
|
|
use warnings;
|
|
|
|
# remove atexit handlers
|
|
$self->{pbot}->{atexit}->unregister_all;
|
|
|
|
# execute the provided subroutine, results are stored in $context
|
|
eval {
|
|
local $SIG{ALRM} = sub { die "Process `$context->{commands}->[0]` timed-out" };
|
|
alarm $timeout;
|
|
$subref->($context);
|
|
die if $@;
|
|
};
|
|
alarm 0;
|
|
|
|
# check for errors
|
|
if ($@) {
|
|
$context->{result} = $@;
|
|
$context->{'timed-out'} = 1 if $context->{result} =~ /^Process .* timed-out at PBot\/ProcessManager/;
|
|
$self->{pbot}->{logger}->log("Error executing process: $context->{result}\n");
|
|
$context->{result} =~ s/ at PBot.*$//ms;
|
|
}
|
|
|
|
# print $context to pipe
|
|
my $json = encode_json $context;
|
|
print $writer "$json\n";
|
|
|
|
# end child
|
|
exit 0;
|
|
} else {
|
|
# parent
|
|
close $writer;
|
|
$self->add_process($context->{pid}, $context);
|
|
$self->{pbot}->{select_handler}->add_reader($reader, sub { $self->process_pipe_reader($context->{pid}, @_) });
|
|
# return empty string since reader will handle the output when child is finished
|
|
return "";
|
|
}
|
|
}
|
|
|
|
sub process_pipe_reader {
|
|
my ($self, $pid, $buf) = @_;
|
|
my $context = decode_json $buf or do {
|
|
$self->{pbot}->{logger}->log("Failed to decode bad json: [$buf]\n");
|
|
return;
|
|
};
|
|
|
|
delete $context->{pid};
|
|
|
|
if (not defined $context->{result} or not length $context->{result}) {
|
|
$self->{pbot}->{logger}->log("No result from process.\n");
|
|
return if $context->{suppress_no_output};
|
|
$context->{result} = "No output.";
|
|
}
|
|
|
|
if ($context->{referenced}) { return if $context->{result} =~ m/(?:no results)/i; }
|
|
|
|
if (exists $context->{special} and $context->{special} eq 'code-factoid') {
|
|
$context->{result} =~ s/\s+$//g;
|
|
$self->{pbot}->{logger}->log("No text result from code-factoid.\n") and return if not length $context->{result};
|
|
$context->{original_keyword} = $context->{root_keyword};
|
|
$context->{result} = $self->{pbot}->{factoids}->handle_action($context, $context->{result});
|
|
}
|
|
|
|
$context->{checkflood} = 0;
|
|
|
|
if (defined $context->{nickoverride}) { $self->{pbot}->{interpreter}->handle_result($context, $context->{result}); }
|
|
else {
|
|
# don't override nick if already set
|
|
if ( exists $context->{special}
|
|
and $context->{special} ne 'code-factoid'
|
|
and $self->{pbot}->{factoids}->{factoids}->exists($context->{channel}, $context->{trigger}, 'add_nick')
|
|
and $self->{pbot}->{factoids}->{factoids}->get_data($context->{channel}, $context->{trigger}, 'add_nick') != 0)
|
|
{
|
|
$context->{nickoverride} = $context->{nick};
|
|
$context->{no_nickoverride} = 0;
|
|
$context->{force_nickoverride} = 1;
|
|
} else {
|
|
# extract nick-like thing from module result
|
|
if ($context->{result} =~ s/^(\S+): //) {
|
|
my $nick = $1;
|
|
if (lc $nick eq "usage") {
|
|
# put it back on result if it's a usage message
|
|
$context->{result} = "$nick: $context->{result}";
|
|
} else {
|
|
my $present = $self->{pbot}->{nicklist}->is_present($context->{channel}, $nick);
|
|
if ($present) {
|
|
# nick is present in channel
|
|
$context->{nickoverride} = $present;
|
|
} else {
|
|
# nick not present, put it back on result
|
|
$context->{result} = "$nick: $context->{result}";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$self->{pbot}->{interpreter}->handle_result($context, $context->{result});
|
|
}
|
|
|
|
my $text = $self->{pbot}->{interpreter}
|
|
->truncate_result($context->{channel}, $self->{pbot}->{registry}->get_value('irc', 'botnick'), 'undef', $context->{result}, $context->{result}, 0);
|
|
$self->{pbot}->{antiflood}
|
|
->check_flood($context->{from}, $self->{pbot}->{registry}->get_value('irc', 'botnick'), $self->{pbot}->{registry}->get_value('irc', 'username'), 'pbot', $text, 0, 0, 0);
|
|
}
|
|
|
|
1;
|