I have usb bluetooth device which is using btusb 0.6 module (driver). The thing is I am interested to know is: how is the
systemctl start bluetooth.service event invoked?
I was looking info about some kind of so called "bluetooth.service official programming interface" or similar which should help to get the
bluetooth.service standard events info or at least to find out does the interface exist at all? But maybe there is another way?
So my question is... how to catch
bluetooth.service start/stop etc common events or is it really possible to catch them?