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