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brightness

This is a small C program to change the brightness on my laptop (HP EliteBook 820 G1).

It changes the brightness by modifying the brightness file under /sys/class/backlight/intel_backlight/, so if you are using anything else this will probably not work for you.

Before I used a bash script for changing the brightness - can be found under the folder script/ - however I could not set the SUID bit with root as owner as this is prohibited for shebang (#!) scripts under Ubuntu. This program circumvents that restriction.

Just run make install to:

  • compile the program
  • change the owner to root
  • change the permission accordingly - 4754
  • move the new file to /usr/bin/bright
    • if the file already exists, it will not be overwritten, the program will simply compile and nothing else - equivalent to simply running make.

DISCLAIMER: I did not write the bash script myself, however, I cannot remember from where I got it from. I am keeping it for reference.