#!/bin/sh
set -e
set -x
# Note the trailing slash
# base="/sys/class/backlight/amdgpu_bl0/"
base="/sys/class/backlight/intel_backlight/"
_backlight="${base}brightness"
_max="${base}max_brightness"
_max="$(cat "$_max" | awk '{print $1/100;}')"

percent="$(echo "$1" | awk '{print int($1*'"$_max"');}')"

sudo sh -c "echo \"$percent\" > $_backlight"