#!/bin/bash

t=$(grep -Hsi keyboard /sys/class/input/input*/name | sed -e 's#.*input\([0-9]*\)/name.*#event\1#')
unset t
if [[ -z "${t}" ]]; then
	t=$(grep -Hsi keyboard /sys/class/input/event*/device/driver/description | grep -o 'event[0-9]\+')
	if [[ -z "${t}" ]]; then
		for i in /sys/class/input/input* ; do
			if [ "$((0x$(cat $i/capabilities/ev) & 0x100002))" = "1048578" ]; then
				t=$(echo $i | sed -e 's#.*input\([0-9]*\)#event\1#')
			fi
		done

		if [[ -z "${t}" ]]; then
			# Try an alternative method of finding the event device. The idea comes
			# from Bombadil <bombadil(at)h3c.de>. We're couting on the keyboard controller
			# being the first device handled by kbd listed in input/devices.
			t=$(/bin/grep -s -m 1 '^H: Handlers=kbd' /proc/bus/input/devices | grep -o 'event[0-9]*')
			echo "got $t using method #4"
		else
			echo "got $t using method #3"
		fi
	else
		echo "got $t using method #2"
	fi
else
	echo "got $t using method #1"
fi