gistfile1.rb

 # Converts a TIFF to PDF using tiff2pdf
  def tiff2pdf(tiff_data)
    cmd = %W[tiff2pdf -p A4 -c FFM -t #{@timestamp}]

    file_to_convert = Tempfile.new('ffm')
    file_to_convert.write(tiff_data)
    file_to_convert.rewind

    # begin
    `#{cmd.join(' ')} #{file_to_convert.path}`
    ensure
      file_to_convert.close
      file_to_convert.unlink
    end
  end