CMSTROM led control for Linux

Code designed for this specific keyboard Cooler Master CM Storm Devastator, but easily modifiable for others, modify variables: led_path and kbd

Install

• Build: g++ cmstrom_led.cpp -o cmstrom_led -lncurses
• Check that it works correctly: ./cmstrom_led
• Install: sudo cp -f cmstrom_led /bin/

Get input id:

$ ls /sys/class/leds/
input7::capslock  input7::numlock  input7::scrollloc

Check path:

$ ls /sys/class/leds/input7::scrolllock/brightness
/sys/class/leds/input7::scrolllock/brightness

Input is 7 in my case.

Option 1 - Create: /etc/systemd/system/cmstrom_led.service

iption=/bin/cmstrom_led
ConditionPathExists=/bin/cmstrom_led
 
[Service]
Type=simple
User=root
ExecStart=/bin/bash -c "/bin/cmstrom_led $(ls /sys/class/leds/ | grep scroll | cut -d ':' -f1 | sed 's/input//g')"
TimeoutSec=0
StandardOutput=tty
RemainAfterExit=yes
SysVStartPriority=99
 
[Install]
WantedBy=multi-user.target

Reload units: systemctl daemon-reload Enable unit: sudo systemctl enable cmstrom_led && systemctl start cmstrom_led

Option 2 - Create: /etc/rc3.d/S01cmstrom_led.sh

#!/bin/sh -e
/bin/bash -c "/bin/cmstrom_led $(ls /sys/class/leds/ | grep scroll | cut -d ':' -f1 | sed 's/input//g')" &
exit 0

Permissions: chmod +x /etc/rc3.d/cmstrom_led.sh

Bonus

You can see which key you are pressing, uncomment the following line: https://github.com/Tedezed/cmstrom_led_control/blob/master/cmstrom_led.cpp#L33