Set bindings in i3 to control keyboard backlight

For my [i3 window-manager](https://i3wm.org/) settings, I am looking for a command line tool, similar to xbacklight, but to control the brightness of the leds which are in the keyboard. Basically, I can set up the leds through a command line, but it requires to be root: # Light off the leds echo 0 > /sys/class/leds/smc::kbd_backlight/brightness # Light on the leds (full power) echo 100 > /sys/class/leds/smc::kbd_backlight/brightness I know that it is possible because Gnome3 has support for that, but I do not know exactly how they proceed... For now, my ~/.config/i3/config looks like this: # screen brightness controls bindsym XF86MonBrightnessUp exec xbacklight -inc 10 bindsym XF86MonBrightnessDown exec xbacklight -dec 10 # keyboard backlight controls #TODO # XF86KbdBrightnessUp # XF86KbdBrightnessDown So, is there a tool, similar to xbacklight to do the same than screen brightness with keyboard backlight? It would be even better if this tool would have the control on both (screen and keyboard).