#!/bin/sh

export PATH=/bin TMPDIR=/tmp
trap 'sync ; echo 1 >/proc/sys/kernel/sysrq ; echo b >/proc/sysrq-trigger' EXIT

mount -t proc proc /proc
mount -t devtmpfs devtmpfs /dev
mount -t tmpfs tmp /tmp
mount -t ext4 -r /dev/vdb /root/student
mount -t ext4 -r /dev/vdc /root/project
mount -t ext4 /dev/vdd /root/results

cp -a /root/student/. /tmp/
cp -a --remove-destination /root/project/build/. /tmp/
chmod -R 777 /tmp
cd /tmp || exit 1

sandbox() {
  LIMIT="$1" ; shift
  (
    ulimit -t "$LIMIT" -u 256 -n 256 -f 2048
    setpriv --reuid=1 --regid=1 --clear-groups --no-new-privs --inh-caps=-all \
      timeout -s 9 "$LIMIT" "$@"
  )
}

sandbox 30 make >/root/results/build.log 2>&1
echo $? >/root/results/build.status

for TEST in /root/project/tests/* ; do
  [ -f "$TEST" ] || continue
  NAME="$(basename "$TEST")"

  ARGS="/root/project/args/$NAME"
  [ -f "$ARGS" ] || ARGS=/dev/null

  sandbox 2 "$TEST" <"$ARGS" >"/root/results/$NAME" 2>/dev/null
  echo $? >"/root/results/$NAME.status"
done