Retroarch hotkey "BTN_1 or BTN_2"

[Efriim]

PSclassic 1.5a PSU
RetroPie: N/A
Retroarch: 1.77

I can't find this anywhere else. I'm hoping there is an answer anyways.
I'd like to configure retroarch's quit hotkey; to "BTN_1 or BTN_2".
Multiple assignments for the same hotkey, so that I could press either button with the same result.

Sorry I don't have a Pi anymore, I gifted it, but I hope you can help me anyways.

[Efriim]

Looks to not be possible, though I can map a "btn", "mbtn" and "key". In this case I need to bind two keys.

Does anyone know where to put a script that will execute on a key press?
killall retroarch
or how to exit cleanly?
killp retroarch 5???

[mitu]

@Efriim Here's a better idea - use the Network command interface in RetroArch (see https://docs.libretro.com/development/retroarch/network-control-interface/#enabling) and configure the triggerhappy daemon to listen for certain key/button presses to send the QUIT command to RetroArch.
triggerhappy is installed and started by default on Raspbian/RetroPie). Some configuration is needed and you'd need to install netcat or any of the similar packages, but it's quite simple to do.

[Efriim]

@mitu
I don't have triggerhappy on a Playstation Classic, but it is linux and has a systemd.

There is with "Network Command interface" also "Command interface" support but I don't know how to use this, I guess maybe echo a command at the process?