dotfiles/.local/bin/sbacklight

#!/usr/bin/env sh

######################################################################
# @author      : swytch
# @file        : sbacklight
# @license     : GPLv3
# @created     : Wednesday May 20, 2020 18:22:36 CEST
#
# @description : control screen brightness
######################################################################


## 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)
case "$1" in
        "dec") new=$(expr $current - $step);;
        "inc") new=$(expr $current + $step);;
        "set") new=$(expr $2 \* $step);;
        *) exit
esac

[ $new -gt $max ] && new=$max
[ $new -lt 0 ] && new=0

echo $new > /sys/class/backlight/intel_backlight/brightness
feat: change shebang to `/usr/bin/env sh` this setting is more user-config compliant 2021-02-12 23:20:57 +01:00			`#!/usr/bin/env sh`
init repo 2020-05-06 03:20:19 +02:00
feat: change neovim template plugin + update header of scripts 2020-05-20 18:34:34 +02:00			`######################################################################`
cleanup: script headers 2021-02-14 19:07:45 +01:00			`# @author : swytch`
			`# @file : sbacklight`
legal: change license to GPLv3 in script headers Kept wondering wether I should keep the MIT (because I highly value freedom of act) or embrace the GPL (because I don't want this work to become close-source). I do understand that this commit (and the next one that is actually changing the LICENSE) is a defeat for freedom. I guess freedom has been defeated long time ago, when people and companies figured that was "free" (as in gratis) was also "free" (as in disposable). This is not how I think free (as in "libre") works but hey, that surely is how Intel and other corporations see it (ec: Intel Management Engine is entirely based on Minix, is close-source, and maybe used as a backdoor by anybody). It boils down to the Paradox of Tolerance, and I surely won't tolerate shit going their way. If you want to take open source stuff, be my guest ; but you have to play by the rules. 2021-02-15 00:37:34 +01:00			`# @license : GPLv3`
cleanup: script headers 2021-02-14 19:07:45 +01:00			`# @created : Wednesday May 20, 2020 18:22:36 CEST`
feat: change neovim template plugin + update header of scripts 2020-05-20 18:34:34 +02:00			`#`
cleanup: script headers 2021-02-14 19:07:45 +01:00			`# @description : control screen brightness`
feat: change neovim template plugin + update header of scripts 2020-05-20 18:34:34 +02:00			`######################################################################`


init repo 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)`
cleanup: variables and code 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`
init repo 2020-05-06 03:20:19 +02:00
cleanup: variables and code 2021-09-07 23:52:48 +02:00			`[ $new -gt $max ] && new=$max`
init repo 2020-05-06 03:20:19 +02:00			`[ $new -lt 0 ] && new=0`

			`echo $new > /sys/class/backlight/intel_backlight/brightness`