automate/chroot_umount.sh

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PREFIX=/mnt/chroot-0
COUNT=0
while grep -q "$PREFIX" /proc/mounts; do
COUNT=$(($COUNT+1))
if [ $COUNT -ge 20 ]; then
echo "failed to umount $PREFIX"
if [ -x /usr/bin/lsof ]; then
/usr/bin/lsof "$PREFIX"
fi
exit 1
fi
grep "$PREFIX" /proc/mounts | \
cut -d\ -f2 | LANG=C sort -r | xargs -r -n 1 umount || sleep 1
done