udev-rules.md

udev Rules (evdev Reading)

Prerequisites

These commands change system permissions and should only be applied when needed.

Option 1: input Group

1. Add your user to the group:

sudo usermod -aG input "$USER"

2. Log out and log back in (or reboot) so group membership is refreshed.

Option 2: Targeted udev Rule (Example)

Create /etc/udev/rules.d/99-inputevents.rules:

KERNEL=="event*", SUBSYSTEM=="input", GROUP="input", MODE="0640"

Reload rules:

sudo udevadm control --reload-rules
sudo udevadm trigger

Verify

ls -l /dev/input/event*

The service does not create or modify udev rules automatically.