10 # Internal server error
21 # These constants are changed by ex/makevm
22 use constant USER
=> 65534;
23 use constant GROUP
=> 65534;
25 use BSD
::Resource qw
/setrlimit RLIMIT_AS RLIMIT_FSIZE RLIMIT_NPROC/;
26 use IPC
::Signal qw
/sig_name sig_num/;
31 use Time
::HiRes qw
/alarm/;
33 my (@fds, $timeout, $mlimit, $olimit, $nobody);
38 "timeout=f" => \
$timeout,
39 "mlimit=i" => \
$mlimit,
40 "olimit=i" => \
$olimit,
42 "nobody!" => \
$nobody,
45 my $ret = fork // die 'Cannot fork';
48 local $SIG{ALRM
} = sub { kill KILL
=> $ret; $tle = 1};
49 alarm ($timeout || 5);
53 my $signame = sig_name
$sig;
54 exit !say TLE
, "\nTime Limit Exceeded" if $tle;
55 exit !say OLE
, "\nOutput Limit Exceeded" if $sig && $signame eq 'XFSZ';
56 exit !say DIED
, "\nCrash (SIG$signame)" if $sig && $signame ne 'PIPE';
57 exit !say NZX
, "\nNon-zero exit status: " . ($?
>> 8) if $?
>> 8;
58 exit !say AC
, "\nAll OK";
62 POSIX
::close $_ for 0 .. $^F
;
64 for my $fdstring (@fds) {
65 my ($fd, $file) = split ' ', $fdstring, 2;
66 open my $fh, $file or die $!;
67 my $oldfd = fileno $fh;
69 POSIX
::dup2
$oldfd, $fd or die $!;
70 POSIX
::close $oldfd or die $!;
73 %ENV = (ONLINE_JUDGE
=> 1, PATH
=> $ENV{PATH
}, HOME
=> $ENV{HOME
});
74 setrlimit RLIMIT_AS
, $mlimit, $mlimit or die $! if $mlimit;
75 setrlimit RLIMIT_FSIZE
, $olimit, $olimit or die $! if $olimit;
76 setrlimit RLIMIT_NPROC
, 1, 1 or die $! if $nobody;
77 POSIX
::setgid
$nobody ?
65534 : USER
;
78 POSIX
::setuid
$nobody ?
65534 : GROUP
;
89 gruntmaster-exec - Gruntmaster 6000 executor
93 gruntmaster-exec 20000000 111 echo 'Hello, world!'
97 gruntmaster-exec is the script used by gruntmasterd to run programs.
99 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.
101 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.
105 Marius Gavrilescu E<lt>marius@ieval.roE<gt>
107 =head1 COPYRIGHT AND LICENSE
109 Copyright (C) 2014 by Marius Gavrilescu
111 This program is free software: you can redistribute it and/or modify
112 it under the terms of the GNU Affero General Public License as published by
113 the Free Software Foundation, either version 3 of the License, or
114 (at your option) any later version.
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