lib/Gruntmaster/Daemon/Runner/Interactive.pm

   1 package Gruntmaster::Daemon::Runner::Interactive;
   2
   3 use 5.014000;
   4 use strict;
   5 use warnings;
   6
   7 use File::Slurp qw/slurp/;
   8 use Gruntmaster::Daemon::Constants qw/WA/;
   9 use Log::Log4perl qw/get_logger/;
  10 use POSIX qw/mkfifo/;
  11 use Try::Tiny;
  12
  13 our $VERSION = '5999.000_001';
  14
  15 ##################################################
  16
  17 sub run{
  18   my ($test, $meta) = @_;
  19   get_logger->trace("Running on test $test...");
  20
  21   mkfifo 'fifo1', 0600 or die $! unless -e 'fifo1';
  22   mkfifo 'fifo2', 0600 or die $! unless -e 'fifo2';
  23
  24   my $ret = fork // get_logger->logdie("Fork failed: $!");
  25   if ($ret) {
  26         $meta->{files}{prog}{run}->($meta->{files}{prog}{name}, fds => [qw/0 fifo1 1 >fifo2/], map {defined $meta->{$_} ? ($_ => $meta->{$_}) : () } qw/timeout mlimit/);
  27         waitpid $ret, 0;
  28         die [WA, "Wrong Answer"] if $?;
  29   } else {
  30         try {
  31           $meta->{files}{int}{run}->($meta->{files}{int}{name}, fds => [qw/1 >fifo1 0 fifo2 4 >result/]);
  32         } catch {
  33           exit 1;
  34         };
  35         exit
  36   }
  37
  38   scalar slurp 'result'
  39 }
  40
  41 1;
  42 __END__
  43
  44 =encoding utf-8
  45
  46 =head1 NAME
  47
  48 Gruntmaster::Daemon::Runner::Interactive - Make an interactive verifier talk to the program
  49
  50 =head1 SYNOPSIS
  51
  52   use Gruntmaster::Daemon::Runner::Interactive;
  53   Gruntmaster::Daemon::Runner::Interactive->run(5, $meta);
  54
  55 =head1 DESCRIPTION
  56
  57 B<WARNING: This runner is experimental!>
  58
  59 Gruntmaster::Daemon::Runner::Interactive is a runner which runs the program and an interactive verifier in parallel, connecting each program's STDIN to the other's STDOUT. The verifier, C<< $meta->{files}{int} >>, should return nonzero if the program gives an incorrect answer, and print the test score to fd 4 then return 0 if the answer is correct.
  60
  61 =head1 AUTHOR
  62
  63 Marius Gavrilescu E<lt>marius@ieval.roE<gt>
  64
  65 =head1 COPYRIGHT AND LICENSE
  66
  67 Copyright (C) 2014 by Marius Gavrilescu
  68
  69 This library is free software: you can redistribute it and/or modify
  70 it under the terms of the GNU Affero General Public License as published by
  71 the Free Software Foundation, either version 3 of the License, or
  72 (at your option) any later version.
  73
  74
  75 =cut