How to intercept a button press on a wired headset on Linux?

Question

linux

The usual headset, two headphones, a microphone and a button. You know. The laptop socket just allows you to stick such a "two in one". Of course, the microphone will work. And I also want buttons, so that when clicked, for example, the specified command is executed

Answer 1

the button closes the microphone input to a common wire. this is the moment you need to catch hardware

Answer 2

The laptop socket is just the same two in one - a microphone and headphones. And you need 3 in one.