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#!/bin/sh
# ====================================
# Program : brl (brightness control)
# License : The Unlicense
# Author : sabr@ariamath.xyz
# Version : 0.0.1
# ====================================
# Honestly, brightnessctl is bloat.
# ====================================
device="$(find /sys/class/backlight/*)"
fmax="$device/max_brightness"
fnow="$device/brightness"
m="$(cat "$fmax")"
c="$(cat "$fnow")"
case "$1" in
"-s") printf "%d" $(($2 * m / 100)) > "$fnow";;
"-i") printf "%d" $((c + $2 * m / 100)) > "$fnow";;
"-d") printf "%d" $((c - $2 * m / 100)) > "$fnow";;
"-v")
printf "brl v0.0.1\n"
printf "A simple brightness control program\n"
;;
"-h")
printf "brl [options] [value]\n"
printf " -s set brightness %%\n"
printf " -i increase brightness %%\n"
printf " -d decrease brightness %%\n"
;;
*)
printf "Current brightness: %d%% (%d)\n"\
$((c * 100 / m)) "$c"
;;
esac
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