gistfile1.rb

   def setup
      if WINDOWS
         @block_dev = "NUL"
         @other_dev = "C:\\"
      else
         if File.exists?("/dev/fd0")
            @block_dev = "/dev/fd0"
         elsif File.exists?("/dev/diskette")
            @block_dev = "/dev/diskette"
         elsif File.exists?("/dev/cdrom")
            @block_dev = "/dev/cdrom"
         elsif File.exists?("/dev/sr0") # CDROM
            @block_dev = "/dev/sr0"
         elsif File.exists?("/dev/disk0")
            @block_dev = "/dev/disk0"
         else
            @block_dev = nil
         end
         @other_dev = "/usr/bin"
      end
   end