#!/bin/bash
# ////////////////////////////////////////////////////////////////////////////////
# //BOCA Online Contest Administrator
# //    Copyright (C) 2003-2014 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/aug/2014 by cassio@ime.usp.br
#
# parameters are:
# $1 exe_file
# $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 MBytes)
# $6 maximum allowed output size (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 [ -x "../safeexec.exe" ]; then
  cp "../safeexec.exe" "safeexec.exe"
  sf="./safeexec.exe"
fi

if [ "$1" == "" -o "$2" == "" -o "$3" == "" ]; then
  echo "parameter problem"
  exit 43
fi
if [ -r run.exe ]; then
  rm -f run.jar
  cp run.exe run.jar
fi
if [ -r "$1" ]; then
  rm -f run.jar
  cp "$1" run.jar
fi
if [ ! -r run.jar ]; then
  echo "ERROR: file run.jar not found - possible error during compilation"
  exit 1
fi
name=$(basename "$1")
if [ "${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
if [ ! -r "$2" ]; 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=$3
rtime=$(awk "BEGIN {print int($time+0.9999999)}")
if [ "$rtime" -gt "0" ]; then
  let "ttime = $rtime * 4"
else
  time=1
  ttime=4
fi

nruns=1
if [ "$4" != "" ]; then
  if [ "$4" -gt "1" ]; then
    echo "WARNING: nruns is set to $4, but it will be ignored because it's not supported by interactive problems"
  fi
fi
maxm=512000
if [ "$5" != "" ]; then
  if [ "$5" -gt "0" ]; then
    maxm=${5}000
  fi
fi
let "maxms = $maxm / 10"
maxf=1024
if [ "$6" != "" ]; then
  if [ "$6" -gt "0" ]; then
    maxf=${6}
  fi
fi

cp "$2" stdin0 2>/dev/null
cp "$1" run.exe 2>/dev/null
cp ../interactor.exe interactor.exe 2>/dev/null

cdir=$(pwd)
echo "Current directory is $cdir -- chrooting on it" >&2

### START OF BOCA RUN COMMAND
cat >runit.sh <<"EOF"
{{runit_content}}
EOF
chmod 755 runit.sh

ret=0
echo $cdir | grep -q "/bocajail"
if [ $? -eq 0 ]; then
  cdir=$(echo $cdir | sed "s/.*\/bocajail//")
  cat <<EOF >runch.sh
  #!/bin/bash
  cd "$cdir"
  [ -f /proc/cpuinfo ] || /bin/mount -t proc proc /proc
  [ -d /sys/kernel ] || /bin/mount -t sysfs sysfs /sys
  java=$(which java)
  [ -x "\$java" ] || java=/usr/bin/java
  if [ ! -x "\$java" ]; then
      echo "\$java not found or it's not executable"
      exit 47
  fi
  ./runit.sh "$cdir" "$sf" "$ttime" -r$nruns -t$time -T$ttime -F256 -u256 -U$bocau -G$bocag -n0 -C. -f20000 -d20000000 -m20000000 -- "\$java" -cp run.jar -Xmx${maxm}K -Xss${maxms}K -Xms${maxm}K MainKt
  retval=\$?
  echo \$retval > runch.exitcode
  if [ ! -d /bocajail ]; then
    /bin/umount /proc 2>/dev/null
    /bin/umount /sys 2>/dev/null
  fi
  rm -rf fifo.in fifo.out
EOF
  chmod 755 runch.sh
  chroot /bocajail $cdir/runch.sh
  if [ -r runch.exitcode ]; then
    ret=$(cat runch.exitcode)
  fi
  if [ "$ret" == "" ]; then
    echo "Execution error - check autojudging"
    exit 49
  fi
else
  echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
  echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
  echo "CODE NOT BEING CHROOTED. DO NOT RUN THIS ON THE MAIN SERVER" >&2
  java=$(which java)
  [ -x "$java" ] || java=/usr/bin/java
  if [ ! -x "$java" ]; then
    echo "$java not found or it's not executable"
    exit 47
  fi
  ./runit.sh "$cdir" "$sf" "$ttime" -r$nruns -t$time -T$ttime -F256 -u256 -U$bocau -G$bocag -n0 -C. -f20000 -d20000000 -m20000000 -- "\$java" -cp run.jar -Xmx${maxm}K -Xss${maxms}K -Xms${maxm}K MainKt
  ret=$?
  rm -rf fifo.in fifo.out
fi
### END OF BOCA RUN COMMAND

if [ $ret -gt 10 ]; then
  echo "execution error with code $ret" >&2
  if [ -r stderr0 ]; then
    grep -q "not find or load main class" stderr0
    if [ $? == 0 ]; then
      echo "> > > Nonzero return code - possible class name mismatch - do check < < <"
    else
      echo "> > > Nonzero return code - possible runtime error - do check < < <"
    fi
    ret=9
  fi
fi
if [ -f stdout0 ]; then
  cat stdout0
fi
exit $ret
