color-brightness

#!/bin/bash
# parameters:
#  1 - display
#  2 - option
#  3 - option parameter
file="/tmp/brightness"
display=$1
if [ -f $file ]; then
	brightness=$(cat $file)
else
	brightness=1
fi
case $2 in
	-inc)
	brightness=`echo "$brightness + $3" | bc -l`
	echo $brightness>$file
	xrandr --output $display --brightness $brightness
	;;
	-dec)
	brightness=`echo "$brightness - $3" | bc -l`
	echo $brightness>$file
	xrandr --output $display --brightness $brightness
	;;
	-set)
	brightness=$3
	echo $brightness>$file
	xrandr --output $display --brightness $brightness
	;;
	-get)
	echo $brightness
	;;
	-rm)
	rm $file
	;;
esac