# File lib/net/ftp.rb, line 467
    def storlines(cmd, file, &block) # :yield: line
      synchronize do
        voidcmd("TYPE A")
        conn = transfercmd(cmd)
        loop do
          buf = file.gets
          break if buf == nil
          if buf[-2, 2] != CRLF
            buf = buf.chomp + CRLF
          end
          conn.write(buf)
          yield(buf) if block
        end
        conn.close
        voidresp
      end
    end