MHmorgan / brightness

A hack to increase and decrease brightness on linux.

Brightness

A program to increase and decrease brightness on linux.

Program

Try to use Xrandr or xbacklight etc. first if you just want to change the brightness.

To use without sudo:

sudo chown root brightness
sudo chmod 4755 brightness

or

make install

Usage

brightness <inc|dec> [VALUE]
brightness <val|max>
brightness set VALUE

inc     increase brightness
dec     decrease brightness
set     set brightness value
val     print current brightness value
max     print max brightness value

C API

Include brightness.h to use these functions.

/* Returns the current brightness value. Returns -1 on failure */
int brt_val();

/* Returns the maximum brightness value. Returns -1 on failure */
int brt_max();

/* Sets the current brightness value to val. Returns 0 on success */
int brt_set(int val);

/* Returns the current brightness as a percent ranging from 0.0 to 1.0.
   Return -1 on failure */
double brt_valp();

/* Sets the current brightness value to the percentage value val.
   Returns 0 on success. */
int brt_setp(double val);

Changelog

v1.1

• Default increase and decrease values vary with the current brightness level to make the changes smoother.

v2.0

• Added header with C library

v2.1

• Added set, val and max commands