Greetings, I'm trying to implement the following behavior: if a usb is added ot removed, run a script before all other existing rules but continue to existing iff the script failed I've added the following rule to /etc/udev/rules.d/5-usb_vm.rules: ACTION=="add", SUBSYSTEM=="usb", RUN="/usr/local/bin/handle_udev_action" ACTION=="remove", SUBSYSTEM=="usb", RUN="/usr/local/bin/handle_udev_action" /usr/local/bin/handle_udev_action runs exit 1 iff the device is a specific one (for testing) but the code continues to the next rule. is there any way to stop it if the script returned 9? Thanks Dagg