#!/bin/sh send_notification() { icon="$XDG_DATA_HOME/icons/Haiku/scalable/status/dialog-information.svg" dunstify -i "$icon" -r 5555 -u low " $(printf %.0f%% "$(xbacklight -get)")" } case $1 in up) # increase the backlight by 5% xbacklight -inc 5 send_notification ;; down) # decrease the backlight by 5% xbacklight -dec 5 send_notification ;; esac