Stop and start Kodi with the remote control

I had a Raspberry that I used as a Mysql, web, ftp, samba, nfs, oscam,... server for my Nvidia Shield and other devices but, since I now have an S905X box, I decided to use it instead as a server for a far better experience. What I want is to stop and start Kodi with a key from my remote control, because is a waste of power having Kodi in the background when I don't use it, and I'd like to know how to do it without the need of SSH and a PC.

Stopping is easy editing the keymap with the "Quit" function but, how could I send the "systemctl start kodi" command with the remote?

Thanks in advance.

For those interested, it can be done with irexec:

- Create the file /storage/.config/lircrc with the following:

    begin
        prog   = irexec
        button = KEY_FAVORITES
        config = Remote.sh
    end

where button is the key you want to assign and config a script like this:

#!/bin/sh
enabled=$(ps -ef | grep -v grep | grep kodi.bin | wc -l)

if [[ $enabled == "0" ]]; then
    systemctl start kodi
else
    systemctl stop kodi
fi

that starts kodi if isn't running and stops it if it is.

Now you only have to add "irexec -d" to the autostart.sh file and reboot your box.