ct - climb tree

function ct {
    local cd_path="$( pwd )"
    local flag=""

    if [ $# -eq 0 ]; then
        echo "You must supply a directory name"
        return
    fi

    while [ -z ${flag} ]; do
        if [ $( basename "${cd_path}" ) = "${1}" ]; then
            flag="yes"
        else
            cd_path="$( dirname "${cd_path}" )"
            if [ "${cd_path}" = "/" ]; then
                flag="no"
            fi
        fi
    done

    if [ ${flag} = "yes" ]; then
        cd "${cd_path}"
        if [ -n "${2}" ]; then
            cd "${2}"
        fi
    else
        echo "'${1}' not found in working directory path"
    fi
}