A CLI to control device backlight. It defaults to the intel_backlight class.
# development tracks the latest stable zig release (0.11.0)
zig buildbrightnessztl <action> [action-options]
Actions:
get: Display current brightness
set: Update the brightness
debug: Display backlight information
help: Display this
Set options:
X: Increase brightness to X%
+X: Increase brightness by X%
-X: Decrease brightness by X%
max: Set brightness to maximum
min: Set brightness to minimum
By default, brightnessztl now links in libsystemd to leverage the D-Bus C
API to allow setting backlight values without root permissions or udev rules.
(h/t https://github.com/joachimschmidt557)
To disable this behavior, you can build via zig build -Dlogind=false.
brightnessztl will require either root access or the following udev rules to
run:
ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", RUN+="/bin/chgrp video /sys/class/backlight/%k/brightness"
ACTION=="add", SUBSYSTEM=="backlight", KERNEL=="intel_backlight", RUN+="/bin/chmod g+w /sys/class/backlight/%k/brightness"
Available on Arch Linux via AUR
MIT