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#!/usr/bin/env bash
# Script to lower/ raise screen brightness using xbacklight (xorg-xbacklight)
set -e -u
export DISPLAY=:0
x11user=$(w |grep -w :0 | cut -d " " -f1)
export XAUTHORITY=/home/$x11user/.Xauthority
step=5
if [ -x /usr/bin/xbacklight ]; then
if [ "$1" = "video/brightnessup" ] && [ $2 = "BRTUP" ]; then
xbacklight -inc "$step"
elif [ "$1" = "video/brightnessdown" ] && [ $2 = "BRTDN" ]; then
xbacklight -dec "$step"
else
exit 1
fi
else
exit 1
fi
exit 0
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