Enforce time limit for interactive verifiers
[gruntmaster-daemon.git] / lib / Gruntmaster / Daemon / Runner / Interactive.pm
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1package Gruntmaster::Daemon::Runner::Interactive;
2
3use 5.014000;
4use strict;
5use warnings;
6
7use File::Slurp qw/slurp/;
8use Gruntmaster::Daemon::Constants qw/WA/;
9use Log::Log4perl qw/get_logger/;
10use POSIX qw/mkfifo/;
11use Try::Tiny;
12
d6a1ae0d 13our $VERSION = '5999.000_002';
bc372959 14
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15##################################################
16
17sub run{
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18 my ($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 {
5f8de888 31 $meta->{files}{ver}{run}->($meta->{files}{ver}{name}, fds => [qw/1 >fifo1 0 fifo2 4 >result/], args => [$test], map {defined $meta->{$_} ? ($_ => $meta->{$_}) : () } qw/timeout mlimit/);
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32 } catch {
33 exit 1;
34 };
35 exit
36 }
37
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38 unlink 'fifo1';
39 unlink 'fifo2';
40
a722431b 41 scalar slurp 'result'
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42}
43
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441;
45__END__
46
47=encoding utf-8
48
49=head1 NAME
50
51Gruntmaster::Daemon::Runner::Interactive - Make an interactive verifier talk to the program
52
53=head1 SYNOPSIS
54
55 use Gruntmaster::Daemon::Runner::Interactive;
56 Gruntmaster::Daemon::Runner::Interactive->run(5, $meta);
57
58=head1 DESCRIPTION
59
60B<WARNING: This runner is experimental!>
61
62Gruntmaster::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.
63
64=head1 AUTHOR
65
66Marius Gavrilescu E<lt>marius@ieval.roE<gt>
67
68=head1 COPYRIGHT AND LICENSE
69
70Copyright (C) 2014 by Marius Gavrilescu
71
72This library is free software: you can redistribute it and/or modify
73it under the terms of the GNU Affero General Public License as published by
74the Free Software Foundation, either version 3 of the License, or
75(at your option) any later version.
76
77
78=cut
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