#!/bin/sh

echo "PREINIT: Start"

PATH=/sbin:/bin:/usr/sbin:/usr/bin
if true; then
    mount -o remount,rw /

    mkdir -p /proc
    mkdir -p /sys
    mkdir -p /run
    mkdir -p /var/run
    mkdir -p /data
fi

mount -t proc proc /proc
mount -t sysfs sysfs /sys

[ -z "$CONSOLE" ] && CONSOLE="/dev/console"

BASE_OVERLAY_ETC_DIR=/data/overlay-etc
UPPER_DIR=$BASE_OVERLAY_ETC_DIR/upper
WORK_DIR=$BASE_OVERLAY_ETC_DIR/work
LOWER_DIR=$BASE_OVERLAY_ETC_DIR/lower

DEVICE=`blkid --label data`

if mount -n -t ext4 \
    -o defaults \
    $DEVICE /data
then
    mkdir -p $UPPER_DIR
    mkdir -p $WORK_DIR

    if false; then
        mkdir -p $LOWER_DIR

        # provide read-only access to original /etc content
        mount -o bind,ro /etc $LOWER_DIR
    fi

    mount -n -t overlay \
        -o upperdir=$UPPER_DIR \
        -o lowerdir=/etc \
        -o workdir=$WORK_DIR \
        -o index=off,xino=off,redirect_dir=off,metacopy=off \
        $UPPER_DIR /etc || \
            echo "PREINIT: Mounting etc-overlay failed!"
else
    echo "PREINIT: Mounting </data> failed!"
fi

echo "PREINIT: done; starting </sbin/init>"
exec /usr/sbin/init
