# File lib/zip/zipfilesystem.rb, line 252
      def chown(ownerInt, groupInt, *filenames)
        filenames.each { |fileName|
          e = get_entry(fileName)
          unless e.extra.member?("IUnix")
            e.extra.create("IUnix")
          end
          e.extra["IUnix"].uid = ownerInt
          e.extra["IUnix"].gid = groupInt
        }
        filenames.size
      end