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[gruntmaster-daemon.git] / gruntmaster-exec

diff --git a/gruntmaster-exec b/gruntmaster-exec
index 1bb57583633f53402c9e83cad2ceeb256f2f4c16..97ac555311340538bb1271704b6a63fbf1c3b704 100755 (executable)
--- a/gruntmaster-exec
+++ b/gruntmaster-exec
@@ -1,20 +1,124 @@
-#!/usr/bin/perl -w
+#!/usr/bin/perl
 use v5.14;
 use strict;
-
-use BSD::Resource qw/setrlimit RLIMIT_AS RLIMIT_FSIZE/;
+use warnings;
+
+use constant +{
+       # Accepted
+       AC => 0,
+
+       # Internal server error
+       ERR => -1,
+
+       # All other errors
+       WA => 1,
+       NZX => 2,
+       TLE => 3,
+       OLE => 4,
+       DIED => 5,
+       REJ => 10,
+};
+
+use BSD::Resource qw/setrlimit RLIMIT_AS RLIMIT_FSIZE RLIMIT_NPROC/;
+use IPC::Signal qw/sig_name sig_num/;
 use sigtrap qw/XFSZ/;
 
-##################################################
-
-my ($mlimit, $olimit, @args) = @ARGV;
-
-setrlimit RLIMIT_AS, $mlimit, $mlimit or die $! if $mlimit;
-setrlimit RLIMIT_FSIZE, $olimit, $olimit or die $! if $olimit;
-
-%ENV = (ONLINE_JUDGE => 1, PATH => $ENV{PATH}, HOME => $ENV{PATH});
-exec @args;
-
+use Getopt::Long;
+use POSIX qw//;
+use Text::ParseWords qw/shellwords/;
+use Time::HiRes qw/alarm/;
+
+my (@fds, $timeout, $mlimit, $olimit, $sudo, $keep_stderr);
+
+GetOptions(
+       "fd=s"         => \@fds,
+       "timeout=f"    => \$timeout,
+       "mlimit=i"     => \$mlimit,
+       "olimit=i"     => \$olimit,
+       "keep-stderr!" => \$keep_stderr,
+       "sudo!"        => \$sudo,
+);
+
+sub test_pipe_read {
+       my $data = '';
+       sysread STDIN, $data, 4096 and syswrite STDOUT, "recvd\n" until $data =~ /done/;
+       syswrite STDOUT, 'done';
+}
+
+sub test_pipe_write {
+       my ($rin, $rout);
+       vec($rin, fileno STDIN, 1) = 1;
+       syswrite STDOUT, "data\n" until select $rout = $rin, undef, undef, 0.05;
+       syswrite STDOUT, 'done';
+       my $data = '';
+       sysread STDIN, $data, 4096 until $data =~ /done/;
+}
+
+sub test_pipes {
+       $ARGV[0] =~ /prog/ ? test_pipe_read : test_pipe_write
+}
+
+my @sudo;
+@sudo = (shellwords ($ENV{GRUNTMASTER_SUDO}), '--') if $ENV{GRUNTMASTER_SUDO} && $sudo;
+undef $mlimit if @sudo; # sudo wants a lot of address space
+
+my $ret = fork // die 'Cannot fork';
+if ($ret) {
+       my ($tle, $child_ready);
+       local $SIG{USR1} = sub { $child_ready = 1 };
+       sleep 3; # Wait for ready signal (SIGUSR1)
+       unless ($child_ready) {
+               kill KILL => $ret;
+               exit !say ERR, "\nNo response from gruntmaster-exec child";
+       }
+       local $SIG{ALRM} = sub {
+               kill KILL => $ret;
+               $tle = 1
+       };
+       alarm ($timeout || 10);
+       waitpid $ret, 0;
+       alarm 0;
+       if (@sudo) {
+               $? = $? >> 8;
+               $? = $? < 128 || $? > 128+32 ? ($? << 8) : $? - 128;
+       }
+       my $sig = $? & 127;
+       my $signame = sig_name $sig;
+       exit !say TLE,  "\nTime Limit Exceeded"   if $tle;
+       exit !say OLE,  "\nOutput Limit Exceeded" if $sig && $signame eq 'XFSZ';
+       exit !say DIED, "\nCrash (SIG$signame)"   if $sig && ($signame ne 'PIPE' || $ARGV[0] !~ /prog/);
+       exit !say NZX,  "\nNon-zero exit status: " . ($? >> 8) if $? >> 8;
+       exit !say AC,   "\nAll OK";
+} else {
+       $^F = 50;
+       POSIX::close 2 unless $keep_stderr;
+       POSIX::close $_ for 0, 1, 3 .. $^F;
+       for my $fdstring (@fds) {
+               my ($fd, $file) = split ' ', $fdstring, 2;
+               open my $fh, $file or die $!;
+               my $oldfd = fileno $fh;
+               if ($oldfd != $fd) {
+                       POSIX::dup2 $oldfd, $fd or die $!;
+                       POSIX::close $oldfd or die $!;
+               }
+       }
+       test_pipes if grep /tty|fifo/, @fds;
+       my $nproc = 15;
+       my $debug = $ENV{TEST_VERBOSE};
+       %ENV = (ONLINE_JUDGE => 1, PATH => $ENV{PATH}, HOME => $ENV{HOME});
+       setrlimit RLIMIT_AS, $mlimit, $mlimit or die $! if $mlimit;
+       setrlimit RLIMIT_FSIZE, $olimit, $olimit or die $! if $olimit;
+       setrlimit RLIMIT_NPROC, $nproc, $nproc or die $! if $sudo;
+       open my $adj, '>', '/proc/self/oom_score_adj';
+       print $adj 900;
+       close $adj;
+       unshift @ARGV, @sudo;
+       kill USR1 => getppid; # Tell parent process that we're ready
+       say STDERR "Executing: ", join ' ', map { "'$_'" } @ARGV if $debug;
+       exec @ARGV;
+}
+
+1;
 __END__
 
 =encoding utf-8