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#!/bin/sh
set -x
set -e
# Note the trailing slash
# base="/sys/class/backlight/amdgpu_bl0/"
base="/sys/class/backlight/intel_backlight/"
percent="$1"; shift
_backlight="${base}brightness"
_max="${base}max_brightness"
# Since `bc` is often not installed by default, just use awk
_max="$(awk '{print $1/100;}' "$_max")"
percent="$(echo "${percent}" | awk '{print int($1*'"$_max"');}')"
echo $percent
sudo sh -c "echo \"$percent\" > $_backlight"
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