--- Socket.sockaddr_un(path)             ruby 1.7 feature
--- Socket.pack_sockaddr_un(path)        ruby 1.7 feature

    ꤷɥ쥹򥽥åȥɥ쥹¤Τ pack ʸ
    ֤ޤ

        require 'socket'
        p Socket.pack_sockaddr_un("/tmp/.X11-unix/X0")
        => "\001\000/tmp/.X11-unix/X0\000...."

