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November 17, 2023 13:02
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note to self: in /usr/local/bin
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#!/bin/bash | |
curr_brightness=$(cat /sys/class/backlight/intel_backlight/brightness) | |
curr_brightness=$(($curr_brightness)) | |
max_brightness="$(cat /sys/class/backlight/intel_backlight/max_brightness)" | |
max_brightness=$(($max_brightness)) | |
brightness=0 | |
# -10%: decrease by a percentage, not going below 0 | |
# +10%: increase by a percentage, not going above $max_brightness | |
# 10%: set to an absolute percentage between 0 and $max_brightness | |
# 10: set to an absoulte brightness not exceeding #max_brightness | |
case $1 in | |
incp) | |
brightness=$(($curr_brightness + $max_brightness * $2 / 100)) | |
;; | |
inc) | |
brightness=$(($curr_brightness + $2)) | |
;; | |
setp) | |
brightness=$(($max_brightness * $2 / 100)) | |
;; | |
"set") | |
brightness=$(($2)) | |
;; | |
esac | |
((brightness = $brightness > $max_brightness ? $max_brightness : $brightness)) | |
((brightness = $brightness < 1 ? 1 : $brightness)) | |
echo "$curr_brightness -> $brightness" | |
echo $brightness > /sys/class/backlight/intel_backlight/brightness |
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