function do_prompt ()
{
    if [ $? -ne 0 ] ; then
        local ERROR_PROMPT="\[\033[01;31m\]"
    fi

    local BASE
    if [ $UID -ne 0 ] ; then
        BASE="$"
    else
        BASE="#"
    fi

    local TITLEBAR
    case $TERM in
       xterm*|*rxvt*|cygwin|interix|Eterm|mlterm|kterm|aterm|putty*)
            if [ "${STY}" ] ; then
                TITLEBAR='\[\033k\u@\h:\w\033\134\]'
            else
                TITLEBAR='\[\033]1;\u@\h:\w\007\033]2;\u@\h:\w\007\]'
            fi
        ;;
        screen*)
            TITLEBAR='\[\033k\u@\h:\w\033\134\]'
        ;;
        *)
            TITLEBAR=''
        ;;
    esac
    PS1="${TITLEBAR}\[\033[01;32m\]\u@\h \[\033[01;34m\]\w ${ERROR_PROMPT}${BASE} \[\033[00m\]"
    export PS1
}

PROMPT_COMMAND=do_prompt