#!/bin/sh

# Wrapper script for backlight control

arg=$1

[ $# -eq 0 ] && { echo "Error: No argument" ; exit 2 ;} 

[ $# -gt 1 ] && { echo Too much arguments ; exit 2 ; }

[ $arg -lt 0 ] && positive_arg=$(echo $arg | tr -d "-") && brightnessctl -c backlight set $positive_arg%- && exit 0

brightnessctl -c backlight set $arg%