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#!/usr/bin/env sh
brightness="$(cat /sys/class/backlight/*/brightness)"
brightness_max="$(cat /sys/class/backlight/*/max_brightness)"
if [ -n "${brightness}" ] && [ -n "${brightness_max}" ]
then
level=$(echo "scale=2; $brightness / $brightness_max * 100" | bc)
printf " "
printf "%.0f\n" $level
fi
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