#!/bin/bash

# import functions library
source rescue_common

tmpdir="/tmp/flash-rescue-root"
rootdir="$tmpdir/pen"

function prepare() {

    modprobe unionfs > /dev/null 2>&1
    modprobe squashfs > /dev/null 2>&1
    modprobe loop > /dev/null 2>&1

    mkdir -p $rootdir
    mkdir -p $tmpdir/squash
    mkdir -p $tmpdir/user
    mkdir -p $tmpdir/union

    if ! mount_usbroot $rootdir; then
        return 1
    fi

    mount -t squashfs -o loop $sfs_loop $tmpdir/squash > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        echo "Error mounting distrib.sqfs"
        return 1
    fi

    mount -t ext2 -o loop $sys_loop $tmpdir/user > /dev/null 2>&1
    if [ $? -ne 0 ]; then
        echo "Error mounting system.loop"
        return 1
    fi

    mount -t unionfs -o dirs=$tmpdir/user=rw:$tmpdir/squash=ro \
        none $tmpdir/union
    if [ $? -ne 0 ]; then
        echo "Error creating union of distrib.sqfs and system.loop"
        return 1
    fi

    chroot $tmpdir/union /etc/init.d/keytable start &> /dev/null
    chroot $tmpdir/union /usr/bin/unicode_start

    return 0
}

function doit() {

    clear
    echo
    chroot $tmpdir/union passwd root
    echo
    echo

    return 0
}

function cleanup() {

    chroot $tmpdir/union /usr/bin/unicode_stop

    umount $tmpdir/union > /dev/null 2>&1
    lumount $tmpdir/user > /dev/null 2>&1
    lumount $tmpdir/squash > /dev/null 2>&1
    umount $rootdir > /dev/null 2>&1

    rmdir $tmpdir/union $tmpdir/user $tmpdir/squash 2> /dev/null
    rmdir $rootdir $tmpdir 2> /dev/null
}

clear
trap cleanup SIGINT

version=""
if ! insert_pendrive; then
    exit 1
fi

if [ x"$version" = x"1.0" ]; then
    sys_loop="$rootdir/loopbacks/system.loop"
    sfs_loop="$rootdir/loopbacks/distrib.sqfs"
else
    sys_loop="$rootdir/.loopbacks/system.loop"
    sfs_loop="$rootdir/.loopbacks/distrib.sqfs"
fi

if ! prepare; then
    cleanup
    exit 1
fi

if ! doit; then
    cleanup
    exit 1
fi

cleanup
exit 0