#!/bin/sh

if [ -z $1 ]; then
	echo "usage: $(basename $0) <brightness:0-100>"
	exit 1
fi

if (( $1 > 100 )) || (( $1 < 0 )); then
	echo "usage: $(basename $0) <brightness:0-100>"
	exit 1
fi

exec &>/dev/null

ddccontrol -r 0x10 -w $1 dev:/dev/i2c-8 

if [ $? -ne 0 ]; then
	echo "Error setting monitor brightness"
	exit 1
fi

exit 0