title: How to handle execvp(...) errors after fork()?
body: <p>I do the regular thing:</p>
  
  <ul>
  <li>fork()</li>
  <li>execvp(cmd, ) in child</li>
  </ul>
  
  <p>If execvp fails because no cmd is found, how can I notice this error in parent process?</p>