find

# File lib/find.rb, line 35
  def find(*paths) # :yield: path
    block_given? or return enum_for(__method__, *paths)

    paths.collect!{|d| raise Errno::ENOENT unless File.exist?(d); d.dup}
    while file = paths.shift
      catch(:prune) do
        yield file.dup.taint
        next unless File.exist? file
        begin
          if File.lstat(file).directory? then
            d = Dir.open(file)
            begin
              for f in d
                next if f == "." or f == ".."
                if File::ALT_SEPARATOR and file =~ /^(?:[\/\\]|[A-Za-z]:[\/\\]?)$/ then
                  f = file + f
                elsif file == "/" then
                  f = "/" + f
                else
                  f = File.join(file, f)
                end
                paths.unshift f.untaint
              end
            ensure
              d.close
            end
          end
       rescue Errno::ENOENT, Errno::EACCES
        end
      end
    end
  end