cli application 'terminal.js' does not detect 'close' events (USB device disconnect)

[ccurtis0]

Summary of Problem

This is spun off from issue #1465

Using the application ./node_modules/serialport/bin/terminal.js to debug a problem I was being misled because this application does not capture the 'close' signal, which is the only signal sent when a USB device providing a serial port is detached.

Steps and Code to Reproduce the Issue

• Insert a USB to serial adapter
• Run ./node_modules/serialport/bin/terminal.js -p /dev/ttyUSB0
• Disconnect the USB device

Package name(s) and version(s)

serialport 7.0.2

Node version, Operating System and hardware

node 8.10.0
Ubuntu 18.04, Linux version 4.15.0-23
Intel Atom E3845

Adding the following code resolves the problem:

  port.on('close', err => {
    console.log('Closed', err)
    process.exit(1)
  })

With this, the USB disconnect event terminates the application.