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Commit | Line | Data |
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c40a2dd0 | 1 | #!/usr/bin/perl |
da905f9e MG |
2 | use v5.14; |
3 | use strict; | |
c40a2dd0 | 4 | use warnings; |
da905f9e | 5 | |
c40a2dd0 MG |
6 | use constant +{ |
7 | # Accepted | |
8 | AC => 0, | |
da905f9e | 9 | |
c40a2dd0 MG |
10 | # Internal server error |
11 | ERR => -1, | |
da905f9e | 12 | |
c40a2dd0 MG |
13 | # All other errors |
14 | WA => 1, | |
15 | NZX => 2, | |
16 | TLE => 3, | |
17 | OLE => 4, | |
18 | DIED => 5, | |
19 | REJ => 10, | |
20 | }; | |
50cdf3cb | 21 | |
c40a2dd0 MG |
22 | use BSD::Resource qw/setrlimit RLIMIT_AS RLIMIT_FSIZE/; |
23 | use IPC::Signal qw/sig_name sig_num/; | |
24 | use sigtrap qw/XFSZ/; | |
69c25408 | 25 | |
c40a2dd0 MG |
26 | use Getopt::Long; |
27 | use POSIX qw//; | |
28 | use Time::HiRes qw/alarm/; | |
29 | ||
30 | my (@fds, $timeout, $mlimit, $olimit); | |
1fe52cde MG |
31 | my $close = 1; |
32 | ||
c40a2dd0 MG |
33 | GetOptions( |
34 | "fd=s" => \@fds, | |
35 | "timeout=f" => \$timeout, | |
36 | "mlimit=i" => \$mlimit, | |
37 | "olimit=i" => \$olimit, | |
1fe52cde | 38 | "close!" => \$close, |
c40a2dd0 MG |
39 | ); |
40 | ||
41 | my $ret = fork // die 'Cannot fork'; | |
42 | if ($ret) { | |
43 | my $tle; | |
44 | local $SIG{ALRM} = sub { kill KILL => $ret; $tle = 1}; | |
45 | alarm ($timeout || 5); | |
46 | waitpid $ret, 0; | |
47 | alarm 0; | |
48 | my $sig = $? & 127; | |
49 | my $signame = sig_name $sig; | |
50 | exit !say TLE, "\nTime Limit Exceeded" if $tle; | |
51 | exit !say OLE, "\nOutput Limit Exceeded" if $sig && $signame eq 'XFSZ'; | |
52 | exit !say DIED, "\nCrash (SIG$signame)" if $sig && $signame ne 'PIPE'; | |
53 | exit !say NZX, "\nNon-zero exit status: " . ($? >> 8) if $? >> 8; | |
54 | exit !say AC, "\nAll OK"; | |
55 | } else { | |
56 | $^F = 50; | |
1fe52cde MG |
57 | if ($close) { |
58 | POSIX::close $_ for 0 .. $^F; | |
59 | } | |
c40a2dd0 MG |
60 | for my $fdstring (@fds) { |
61 | my ($fd, $file) = split ' ', $fdstring, 2; | |
62 | open my $fh, $file or die $!; | |
63 | my $oldfd = fileno $fh; | |
64 | if ($oldfd != $fd) { | |
65 | POSIX::dup2 $oldfd, $fd or die $!; | |
66 | POSIX::close $oldfd or die $!; | |
67 | } | |
68 | } | |
69 | %ENV = (ONLINE_JUDGE => 1, PATH => $ENV{PATH}, HOME => $ENV{HOME}); | |
70 | setrlimit RLIMIT_AS, $mlimit, $mlimit or die $! if $mlimit; | |
71 | setrlimit RLIMIT_FSIZE, $olimit, $olimit or die $! if $olimit; | |
7be8c37d MG |
72 | POSIX::setgid 65534; # Set group id to nogroup |
73 | POSIX::setuid 65534; # Set user id to nobody | |
c40a2dd0 MG |
74 | exec @ARGV; |
75 | } | |
76 | ||
77 | 1; | |
69c25408 MG |
78 | __END__ |
79 | ||
80 | =encoding utf-8 | |
81 | ||
82 | =head1 NAME | |
83 | ||
84 | gruntmaster-exec - Gruntmaster 6000 executor | |
85 | ||
86 | =head1 SYNOPSIS | |
87 | ||
88 | gruntmaster-exec 20000000 111 echo 'Hello, world!' | |
89 | ||
90 | =head1 DESCRIPTION | |
91 | ||
92 | gruntmaster-exec is the script used by gruntmasterd to run programs. | |
93 | ||
94 | The first argument is the address space limit (in bytes), the second argument is the output limit (also in bytes). The rest of the arguments are the command that should be run and its arguments. | |
95 | ||
96 | gruntmaster-exec sets the resource limits, cleans the environment (except for PATH and HOME), adds the ONLINE_JUDGE environment variable with value 1, and finally C<exec>s the given command. | |
97 | ||
98 | =head1 AUTHOR | |
99 | ||
100 | Marius Gavrilescu E<lt>marius@ieval.roE<gt> | |
101 | ||
102 | =head1 COPYRIGHT AND LICENSE | |
103 | ||
104 | Copyright (C) 2014 by Marius Gavrilescu | |
105 | ||
106 | This program is free software: you can redistribute it and/or modify | |
107 | it under the terms of the GNU Affero General Public License as published by | |
108 | the Free Software Foundation, either version 3 of the License, or | |
109 | (at your option) any later version. |