📁 //snap/core22/2437/lib/udev/rules.d/60-persistent-input.rules
# do not edit this file, it will be overwritten on update
ACTION=="remove", GOTO="persistent_input_end"
SUBSYSTEM!="input", GOTO="persistent_input_end"
SUBSYSTEMS=="bluetooth", ENV{ID_BUS}="bluetooth", GOTO="persistent_input_end"
# Bluetooth devices don't always have the bluetooth subsystem
ATTRS{id/bustype}=="0005", ENV{ID_BUS}="bluetooth", GOTO="persistent_input_end"
SUBSYSTEMS=="rmi4", ENV{ID_BUS}="rmi"
SUBSYSTEMS=="serio", ENV{ID_BUS}="i8042"
SUBSYSTEMS=="usb", ENV{ID_BUS}=="", IMPORT{builtin}="usb_id"
# determine class name for persistent symlinks
ENV{ID_INPUT_KEYBOARD}=="?*", ENV{.INPUT_CLASS}="kbd"
ENV{ID_INPUT_MOUSE}=="?*", ENV{.INPUT_CLASS}="mouse"
ENV{ID_INPUT_TOUCHPAD}=="?*", ENV{.INPUT_CLASS}="mouse"
ENV{ID_INPUT_TABLET}=="?*", ENV{.INPUT_CLASS}="mouse"
ENV{ID_INPUT_JOYSTICK}=="?*", ENV{.INPUT_CLASS}="joystick"
DRIVERS=="pcspkr", ENV{.INPUT_CLASS}="spkr"
ATTRS{name}=="*dvb*|*DVB*|* IR *", ENV{.INPUT_CLASS}="ir"
# fill empty serial number
ENV{.INPUT_CLASS}=="?*", ENV{ID_SERIAL}=="", ENV{ID_SERIAL}="noserial"
# by-id links
KERNEL=="mouse*|js*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="|00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{.INPUT_CLASS}"
KERNEL=="mouse*|js*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="?*", ATTRS{bInterfaceNumber}!="00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-$env{.INPUT_CLASS}"
KERNEL=="event*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="|00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-$env{.INPUT_CLASS}"
KERNEL=="event*", ENV{ID_BUS}=="?*", ENV{.INPUT_CLASS}=="?*", ATTRS{bInterfaceNumber}=="?*", ATTRS{bInterfaceNumber}!="00", SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-if$attr{bInterfaceNumber}-event-$env{.INPUT_CLASS}"
# allow empty class for USB devices, by appending the interface number
SUBSYSTEMS=="usb", ENV{ID_BUS}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="", ATTRS{bInterfaceNumber}=="?*", \
SYMLINK+="input/by-id/$env{ID_BUS}-$env{ID_SERIAL}-event-if$attr{bInterfaceNumber}"
# by-path
SUBSYSTEMS=="pci|usb|platform|acpi", IMPORT{builtin}="path_id"
ENV{ID_PATH}=="?*", KERNEL=="mouse*|js*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-$env{.INPUT_CLASS}"
ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="?*", SYMLINK+="input/by-path/$env{ID_PATH}-event-$env{.INPUT_CLASS}"
# allow empty class for platform, usb and i2c devices; platform supports only a single interface that way
SUBSYSTEMS=="usb|platform|i2c", ENV{ID_PATH}=="?*", KERNEL=="event*", ENV{.INPUT_CLASS}=="", \
SYMLINK+="input/by-path/$env{ID_PATH}-event"
LABEL="persistent_input_end"