#!/bin/sh

## Control keyboard brightness
	## level goes up at each call
	## goes back to 0 after meeting maximum brightness

## You need `upower` package to make it work

max=$(cat /sys/class/leds/tpacpi::kbd_backlight/max_brightness)
current=$(cat /sys/class/leds/tpacpi::kbd_backlight/brightness)
new=$(expr $current + 1)

setKeyboardLight () {
    dbus-send --system --type=method_call  --dest="org.freedesktop.UPower" "/org/freedesktop/UPower/KbdBacklight" "org.freedesktop.UPower.KbdBacklight.SetBrightness" int32:$1
}

[ $new -gt $max ] && new=0

setKeyboardLight $new