check_partitions()
{
        grep mtdblock4 /proc/partitions >/dev/null
        if [ $? = 0 ] ; then 
                mtd_found=1
        else
                mtd_found=0
        fi

        grep sda1 /proc/partitions >/dev/null
        if [ $? = 0 ] ; then
                sda_found=1
        else
                sda_found=0
        fi

        grep mmc /proc/partitions >/dev/null
        if [ $? = 0 ] ; then
                mmc_found=1
        else
                mmc_found=0
        fi
}
wait_for_device()
{
        complained=0
        while [ true ]; do
                grep $root_dev /proc/partitions > /dev/null
                if [ $? = 0 ]; then
                        break;
                fi
                if [ $complained -ne 1 ]; then
                        echo -n "Waiting for $root_dev_name to become available... "
                        complained=1
                fi
                sleep 1
        done
        if [ $complained -eq 1 ]; then
                echo "found it."
        fi
}

show_roots()
{
        echo "Choose bootup option:"
        if [ $mtd_found -eq 1 ]; then
                echo "  1) Flash"
        fi
        if [ $mmc_found -eq 1 ]; then
                echo "  2) MMC"
        fi
        if [ $sda_found -eq 1 ]; then
                echo "  3) USB Mass Storage Device"
        fi
        echo "  9) Start a shell"
        echo ""
}