How to detect USB device disconnect under Linux/Qt/C++

Question

I\'m writing a system (X-Platform Windows/Linux) that talks to a custom device using an FTDI USB chip. I use their D2XX driver for device open/close/read/write. So far, so

Answer 1

Don't forget that you have two problems here :

• Detecting device insertion / removal
• Properly terminating your application.

The first problem has been adressed by Zifre.

But the second problem remains : your Linux app should not be segfaulting when the device is removed, and I think the two problems are unrelated : if the device is removed in the middle of a write or read system call, then those system call will return with an error before you get any notification, and this should not segfault your app.