title: Linux equivalent of I_PUSH
body: <p>This question is related to <a href="https://stackoverflow.com/questions/7460035/pty-terminal-packet-mode-tiocpkt">pty terminal packet mode TIOCPKT</a></p>
  
  <p>What the <code>linux</code> way of enabling <code>packet mode</code>? I could not find <code>I_PUSH</code> working when passed in <code>ioctl</code> function.</p>