archiso

run_hook ()
{
    if [ "x${ramdisk_size}" = "x" ]; then
        ramdisk_size="75%"
    fi
    msg -n ":: Mounting tmpfs, size=${ramdisk_size}..."
	mount -t tmpfs -o "size=${ramdisk_size}" tmpfs /tmpfs
    msg "done."

    if [ "x${BOOT_MOUNT}" = "x" ]; then
        echo "ERROR: BOOT_MOUNT is not set. The boot-cd or boot-usb hook MUST"
        echo "       be run before this one.  This image was improperly built"
        exit 1
    fi

    squashimg="${BOOT_MOUNT}/archlive.sqfs"
    if [ "${copytoram}" = "y" ]; then
        /bin/cat ${squashimg} > /tmpfs/archlive.sqfs
        squashimg="/tmpfs/archlive.sqfs"
    fi

    msg ":: Mounting squashfs image"
    /bin/modprobe -q squashfs >/dev/null 2>&1
    /bin/mkdir -p /tmpfs/squashfs_root
    if ! /bin/losetup /dev/loop0 "${squashimg}" >/dev/null 2>&1; then
        echo "ERROR: Cannot mount loop device /dev/loop0...aborting"
        exit 1
    fi

    /bin/mount -r -t squashfs /dev/loop0 /tmpfs/squashfs_root

    msg ":: Mounting root (union) filesystem"
    /bin/modprobe -q unionfs >/dev/null 2>&1
    /bin/mount -t unionfs -o dirs=/tmpfs=rw none /real_root

    # TODO: some of this could be broken into functions
    LOOP_NUM="1"
    addon_dir="${BOOT_MOUNT}/addons"
    if [ -e "${addon_dir}/config" ]; then
        msg ":: Mounting addons"
        while read img mountpoint type; do
            # check if this line is a comment (starts with #)
            [ "${img#'#'}" != "${img}" ] && continue

            if [ "${type}" = "bind" ]; then
                msg "   Binding ${img} to ${mountpoint}"
                mkdir -p /real_root${mountpoint}
                /bin/mount -o bind ${addon_dir}/$img /real_root${mountpoint}
            elif [ "${type}" = "squashfs" ]; then
                msg "   Adding new union branch: ${img}"
                mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
                if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${addon_dir}/$img > /dev/null 2>&1; then
                    echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
                    echo "       Couldn't mount all addons"
                    break
                fi
                /bin/mount -r -t squashfs "/dev/loop${LOOP_NUM}" "/tmpfs/mnt/loop${LOOP_NUM}"
                /bin/mount -t unionfs -o remount,add=:/tmpfs/mnt/loop${LOOP_NUM}=ro none "/real_root"
                LOOP_NUM=$(( $LOOP_NUM + 1 ))
            fi
        done < ${addon_dir}/config
    fi

    /bin/mount -t unionfs -o remount,add=:/tmpfs/squashfs_root=ro none /real_root

    if [ -d /proc/sys/dev/cdrom ]; then
        echo 0 > /proc/sys/dev/cdrom/lock
        echo 1 > /proc/sys/dev/cdrom/autoeject
    fi

    if [ "${break}" = "y" ]; then
        echo ":: Break requested, type 'exit' to resume operation"
        echo "   NOTE: klibc contains no 'ls' binary, use 'echo *' instead"
        PS1="ramfs$ " /bin/sh -i
    fi

    udevpid=$(/bin/minips -C udevd -o pid=)
    [ "x${udevpid}" != "x" ] && /bin/kill -9 $udevpid 2>&1 >/dev/null
    #Yep, we're bailing out here.  We don't need kinit.
    msg ":: Passing control to Archlinux Initscripts...Please Wait"
    /bin/umount /sys
    /bin/umount /proc
    exec /bin/run-init -c /dev/console /real_root /sbin/init ${CMDLINE}
}

# vim:ft=sh:ts=4:sw=4:et: