# File lib/fuse/rfusefs-fuse.rb, line 82
    def raw_mode
      mode_str = case accmode
                 when Fcntl::O_RDWR; "rw"
                 when Fcntl::O_RDONLY; "r"
                 when Fcntl::O_WRONLY; "w"
                 end

      mode_str << "a" if append?
      return mode_str
    end