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#!/bin/bash
# ////////////////////////////////////////////////////////////////////////////////
# //BOCA Online Contest Administrator
# // Copyright (C) 2003-2012 by BOCA System (bocasystem@gmail.com)
# //
# // This program is free software: you can redistribute it and/or modify
# // it under the terms of the GNU General Public License as published by
# // the Free Software Foundation, either version 3 of the License, or
# // (at your option) any later version.
# //
# // This program is distributed in the hope that it will be useful,
# // but WITHOUT ANY WARRANTY; without even the implied warranty of
# // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# // GNU General Public License for more details.
# // You should have received a copy of the GNU General Public License
# // along with this program. If not, see <http://www.gnu.org/licenses/>.
# ////////////////////////////////////////////////////////////////////////////////
#Last modified: 21/july/2012 by cassio@ime.usp.br
#
# parameters are:
# $1 main_class
# $2 input_file
# $3 timelimit (limit to run all the repetitions, by default only one repetition)
# $4 number_of_repetitions_to_run (optional, can be used for better tuning the timelimit)
# $5 maximum allowed memory (in KBytes)
#
# the output of the submission should be directed to the standard output
#
# the return code show what happened (according to safeexec):
# 0 ok
# 1 compile error
# 2 runtime error
# 3 timelimit exceeded
# 4 internal error
# 5 parameter error
# 6 internal error
# 7 memory limit exceeded
# 8 security threat
# 9 runtime error
# other_codes are unknown to boca: in this case BOCA will present the
# last line of standard output to the judge
umask 0022
id -u bocajail >/dev/null 2>/dev/null
if [ $? == 0 ]; then
bocau=`id -u bocajail`
bocag=`id -g bocajail`
chown bocajail.nogroup .
else
bocau=`id -u nobody`
bocag=`id -g nobody`
chown nobody.nogroup .
fi
if [ "$bocau" == "" -o "$bocag" == "" ]; then
echo "error finding user to run script"
exit 43
fi
# this script makes use of safeexec to execute the code with less privilegies
# make sure that directories below are correct.
sf=`which safeexec`
[ -x "$sf" ] || sf=/usr/bin/safeexec
if [ "$1" == "" -o "$2" == "" -o "$3" == "" ]; then
echo "parameter problem"
exit 43
fi
if [ ! -r run.jar ]; then
echo "ERROR: file run.jar not found - possible error during compilation"
exit 1
fi
name="$1"
if [ "${name##*.}" == "class" -a "${name##*.}" == "CLASS" ]; then
echo "WARNING: removing .class file extension"
fi
if [ "${name##*.}" == "class" ]; then
name=`basename "$1" .class`
fi
if [ "${name##*.}" == "CLASS" ]; then
name=`basename "$1" .CLASS`
fi
input=`basename "$2"`
if [ ! -r "$input" ]; then
echo "$2 not found (or is not in the current dir) or it's not readable"
exit 45
fi
if [ ! -x $sf ]; then
echo "$sf not found or it's not executable"
exit 46
fi
time=$3
if [ "$time" -gt "0" ]; then
let "ttime = $time + 30"
else
time=1
ttime=30
fi
nruns=1
if [ "$4" != "" -a "$4" -gt "0" ]; then
nruns=$4
fi
maxm=512
if [ "$5" != "" -a "$5" -gt "0" ]; then
maxm=${5}
fi
rm -f stdin0 2>/dev/null
mv "$input" stdin0
cdir=`pwd`
echo "Current directory is $cdir" >&2
echo $cdir | grep -q "/bocajail"
if [ $? == 0 ]; then
cdir=`echo $cdir | sed "s/.*\/bocajail//"`
cat <<EOF > runit.sh
#!/bin/bash
[ -f /proc/cpuinfo ] || /bin/mount -t proc proc /proc
#/bin/mount --bind /dev /dev
[ -d /sys/kernel ] || /bin/mount -t sysfs sysfs /sys
java=`which java`
[ -x "$java" ] || java=/usr/bin/java
if [ ! -x $java ]; then
echo "$java not found or it's not executable"
exit 47
fi
export CLASSPATH=.:./run.jar:$CLASSPATH
cd $cdir
$sf -r$nruns -t$time -T$ttime -istdin0 -F256 -u256 -ostdout0 -estderr0 -U$bocau -G$bocag -n0 -C. -f20000 -d20000000 -m20000000 -- $java -Xmx${maxm}M -Xms${maxm}M "$name"
echo \$? > runit.retcode
/bin/umount /proc 2>/dev/null
#/bin/umount /dev
/bin/umount /sys 2>/dev/null
EOF
chmod 755 runit.sh
chroot /bocajail $cdir/runit.sh
ret=`cat runit.retcode`
if [ "$ret" == "" ]; then
echo "Execution error - check autojudging"
exit 49
fi
if [ $ret -gt 10 ]; then
echo "> > > > > > > Nonzero return code - possible runtime error - I'M GUESSING IT IS RUNTIME ERROR < < < < < < < <"
exit 9
fi
else
echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
# $java "$name" < stdin0
$sf -r$nruns -t$time -T$ttime -istdin0 -F256 -u256 -U$bocau -G$bocag -ostdout0 -estderr0 -n0 -C. -d20000000 -m20000000 -- $java -cp run.jar -Xmx${maxm}M -Xms${maxm}M "$name"
ret=$?
fi
if [ $ret -gt 10 ]; then
echo "> > > > > > > Nonzero return code - possible runtime error - I'M GUESSING IT IS RUNTIME ERROR < < < < < < < <"
ret=9
fi
fi
if [ -f stdout0 ]; then
cat stdout0
fi
exit $ret
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