This repository has been archived on 2023-03-02. You can view files and clone it, but cannot push or open issues or pull requests.
dotfiles/.local/bin/sbacklight

34 lines
1.0 KiB
Plaintext
Raw Normal View History

#!/usr/bin/env sh
2020-05-06 03:20:19 +02:00
######################################################################
2021-02-14 19:07:45 +01:00
# @author : swytch
# @file : sbacklight
# @license : GPLv3
2021-02-14 19:07:45 +01:00
# @created : Wednesday May 20, 2020 18:22:36 CEST
#
2021-02-14 19:07:45 +01:00
# @description : control screen brightness
######################################################################
2020-05-06 03:20:19 +02:00
## You need write privileges on /sys/.../brightness
## This can be achieved via a `udev` rule (see ~/.config/root)
current=$(cat /sys/class/backlight/intel_backlight/brightness)
max=$(cat /sys/class/backlight/intel_backlight/max_brightness)
step=$(expr $max / 20)
[ "$1" = "dec" ] && new=$(expr $current - $step)
[ "$1" = "inc" ] && new=$(expr $current + $step)
[ "$1" = "set" ] && new=$(expr $2 \* $step)
2021-09-07 23:52:48 +02:00
case "$1" in
"dec") new=$(expr $current - $step);;
"inc") new=$(expr $current + $step);;
"set") new=$(expr $2 \* $step);;
*) exit
esac
2020-05-06 03:20:19 +02:00
2021-09-07 23:52:48 +02:00
[ $new -gt $max ] && new=$max
2020-05-06 03:20:19 +02:00
[ $new -lt 0 ] && new=0
echo $new > /sys/class/backlight/intel_backlight/brightness