# File lib/archive/tar/minitar.rb, line 488
488:       def read(len = nil)
489:         return nil if @read >= @size
490:         len ||= @size - @read
491:         max_read = [len, @size - @read].min
492:         ret = @io.read(max_read)
493:         @read += ret.size
494:         ret
495:       end