title: NodeJS SIGKILL does not exists and throws error
body: <p>I have implement in my node js app restart of node using terminal:</p>
  
  <pre><code>killall -9 node
  </code></pre>
  
  <p>i try to detect SIGKILL before node is actually killed with this code:</p>
  
  <pre><code>process.on('SIGKILL', function() {
      /* DO SOME STUFF HERE */
  
      process.exit()
  })
  </code></pre>
  
  <p>but problem is that node does not recognize <code>SIGKILL</code> and throws an error while compiling...so my question is does anyone have idea how to detect <code>killall -9</code> command in node before node app is terminated so that i can do some stuff before killing node app?</p>
  
  <p>I read on node web page that SIGKILL is reserved and is not used so i need alternative way how to detect <code>killall -9</code> command.... thanks</p>