Mine

# lilo compatibility
parse_numeric() {
    case $1 in
    "")
        return
        ;;
    /*) 
        return
        ;;
    *:*)
        minor=${1#*:}
        major=${1%:*}
        ;;
    *)
        value=$(( 0x${1} ))
        minor=$(( ${value} % 256 ))
        major=$(( ${value} / 256 ))
        ;;
    esac
    
    mknod /dev/root b ${major} ${minor}
    chmod 600 /dev/root
    ROOT