Easy way to detect why the connection was terminated

[qorron]

Our company's VPN disconnects every now and then, so I used a shell script to wrap the gpconnect call in an endless loop.
This however makes voluntarily disconnects difficult. I was looking at the exit code but it is zero either way.

I could tee the output into a file and look at that but that may be cumbersome.

Having the exit code reflect the disconnect reason somehow would solve that.
For my case at least being able to detect this case:
^C[2025-08-06T05:30:49Z INFO gpclient::connect] Received the interrupt signal, disconnecting...
is sufficient.

Perhaps there is another solution to this?

Edit: I'm using the cli-version

[yuezk]

Thank you for your feedback, I will consider this.