title: Returning data from forked processes
body: <p>If I do </p>
  
  <pre><code>Process.fork do 
    x 
  end 
  </code></pre>
  
  <p>how can I know what x returned (e.g. true/fase/string) ? </p>
  
  <p>(Writing to a file/database is not an option...)</p>