# File lib/archive/tar/minitar.rb, line 366
366:     def add_file(name, opts = {}) # :yields RestrictedStream, +opts+:
367:       raise Archive::Tar::Minitar::BlockRequired unless block_given?
368:       raise Archive::Tar::Minitar::ClosedStream if @closed
369:       raise Archive::Tar::Minitar::NonSeekableStream unless @io.respond_to?(:pos=)
370: 
371:       name, prefix = split_name(name)
372:       init_pos = @io.pos
373:       @io.write("\0" * 512) # placeholder for the header
374: 
375:       yield RestrictedStream.new(@io), opts
376:         # FIXME: what if an exception is raised in the block?
377: 
378:       size      = @io.pos - (init_pos + 512)
379:       remainder = (512 - (size % 512)) % 512
380:       @io.write("\0" * remainder)
381: 
382:       final_pos = @io.pos
383:       @io.pos   = init_pos
384: 
385:       header = { :name => name, :mode => opts[:mode], :mtime => opts[:mtime],
386:                  :size => size, :gid => opts[:gid], :uid => opts[:uid],
387:                  :prefix => prefix }
388:       header = Archive::Tar::PosixHeader.new(header).to_s
389:       @io.write(header)
390:       @io.pos = final_pos
391:     end