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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 source_file
# $2 exe_file (default run.exe)
# $3 timelimit (optional, limit to run all the repetitions, by default only one repetition)
# $4 maximum allowed memory (in MBytes, default 512M)
#
# 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
if [ "$1" == "" ]; then
echo "parameter problem"
exit 43
fi
if [ ! -r "$1" ]; then
echo "$1 not found or it's not readable"
exit 44
fi
name="$1"
if [ ! -r "$1" ]; then
echo "$1 not found or it's not readable"
exit 44
fi
mkdir -p src
if [ "${name##*.}" == "zip" -a "${name##*.}" == "ZIP" ]; then
unzip "$name" -d src
name="*.c"
else
cp "$name" src
fi
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 [ ! -x $sf ]; then
echo "$sf not found or it's not executable"
exit 46
fi
maxm=512000
if [ "$4" != "" ]; then
if [ "$4" -gt "0" ]; then
maxm=${4}000
fi
fi
# setting up the timelimit according to the problem
if [ "$3" == "" ]; then
time=5
else
time=$3
fi
let "ttime = $time + 30"
if [ "$2" == "" ]; then
exe=run.exe
else
exe=$2
fi
rm -f $exe compileit.retcode runit.retcode 2>/dev/null
cat <<EOF > compileit.sh
#!/bin/bash
cc=\`which gcc\`
[ -x "\$cc" ] || cc=/usr/bin/gcc
if [ ! -x "\$cc" ]; then
echo "\$cc not found or it's not executable"
exit 47
fi
cd src
"\$cc" -static -O2 -o ../$exe $name -lm
echo \$? > ../compileit.retcode
exit 0
EOF
chmod 755 compileit.sh
cdir=`pwd`
echo "Current directory is $cdir" >&2
echo $cdir | grep -q "/bocajail"
if [ $? == 0 ]; then
cdir=`echo $cdir | sed "s/.*\/bocajail//"`
echo "Internal directory is $cdir"
cat <<EOF > runit.sh
#!/bin/bash
cd "$cdir"
[ -f /proc/cpuinfo ] || /bin/mount -t proc proc /proc
#/bin/mount --bind /dev /dev
[ -d /sys/kernel ] || /bin/mount -t sysfs sysfs /sys
$sf -r1 -F1000 -n0 -U$bocau -G$bocag -C. -ostdout0 -estderr0 -d$maxm -m$maxm -f20000 -t$ttime -T$ttime ./compileit.sh
echo \$? > runit.retcode
if [ ! -d /bocajail ]; then
/bin/umount /proc 2>/dev/null
#/bin/umount /dev
/bin/umount /sys 2>/dev/null
fi
EOF
chmod 755 runit.sh
chroot /bocajail "$cdir/runit.sh"
if [ -r runit.retcode ]; then
ret=`cat runit.retcode`
else
ret=99
fi
else
echo "COMPILATION IS NOT BEING CHROOTED -- THIS IS NOT AN IDEAL SETTING"
$sf -r1 -F1000 -n0 -U$bocau -G$bocag -C. -ostdout0 -estderr0 -d$maxm -m$maxm -f20000 -t$ttime -T$ttime ./compileit.sh
ret=$?
fi
if [ -f "stdout0" ]; then
cat "stdout0"
fi
if [ -f "stderr0" ]; then
cat "stderr0"
fi
rm -rf src/
if [ "$ret" != "0" ]; then
echo "Compilation Error: $ret"
exit $ret
fi
ret=`cat compileit.retcode`
if [ "$ret" != "0" ]; then
echo "Compilation Error: $ret"
ret=1
fi
exit $ret
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