#!/bin/sh

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

mount -t proc proc /proc
mount -t devtmpfs devtmpfs /dev
mount -t tmpfs -o mode=1777,size=64m tmp /tmp
mount -t ext4 -r /dev/vdb /root/student
mount -t ext4 -r /dev/vdc /root/grader
mount -t ext4 /dev/vdd /root/results

mkdir -p /tmp/build
cp -a /root/student/. /tmp/build/
cp -a --remove-destination /root/grader/build/. /tmp/build/
chown -R 65534:65534 /tmp/build

(
  cd /tmp/build
  ulimit -t 30 -u 256 -n 256 -f 2048
  setpriv --reuid=65534 --regid=65534 --clear-groups \
    timeout -s 9 30 make >/root/results/build.log 2>&1
  echo $? >/root/results/build.status
)

[ "$(cat /root/results/build.status)" != 0 ] && exit

for TEST in /root/grader/tests/*.sh ; do
  NAME="$(basename "$TEST" .sh)"
  timeout -s 9 10 "$TEST" 2>/dev/null >"/root/results/$NAME"
done