#!/bin/sh

### BEGIN INIT INFO
# Provides: protect-fs
# Required-Start: mountall-bootclean
# Required-Stop:
# Default-Start: S
# Default-Stop:
# X-Start-Before: procps udev-mtab urandom
# Short-Description: UnionFS mode
# Descrition: Shutdown process will not be required
### END INIT INFO

# Copyright: Bernd Schubert <bernd.schubert@fastmail.fm>
# BSD license, see LICENSE file for details

FUSE_OPT="-o allow_other,use_ino,suid,dev,nonempty"
CHROOT_PATH="/tmp/unionfs"
UNION_OPT="-ocow,chroot=$CHROOT_PATH,max_files=32768"

UBIN=/usr/bin/unionfs-fuse

cd /etc/protect-fs
file=noprotect
if [ -e ${file} ]; then
echo "protect-fs: disable"
exit 0
fi
echo "protect-fs: enable"

#mount -o remount,ro /dev/mmcblk0p1 /boot

#mount -t proc proc /proc
mount -t tmpfs tmpfs /tmp

mkdir -p $CHROOT_PATH/root
mkdir -p $CHROOT_PATH/rw
mkdir -p /tmp/union

mount --bind / $CHROOT_PATH/root

$UBIN $FUSE_OPT $UNION_OPT /rw=RW:/root=RO /tmp/union

mount -t proc proc /tmp/union/proc

cd /tmp/union
mkdir -p oldroot
pivot_root . oldroot

# exit 0

mount  -r -t ext4 -o remount /dev/root /oldroot
#for d in dev run run/lock sys run/shm dev/pts boot
for d in dev run run/lock sys run/shm dev/pts
do
  mount --bind /oldroot/$d /$d
done

init q

#/usr/local/sbin/a-unionfs-fuse-omit-pid.sh
exit 0