g13m

Key mapper for Logitech G13 devices on Linux.

This tool provides support for handling Logitech G13 macropads. It leverages the support Linux 6.19 added for these devices to forego writing low-level driver code. As such, it will only work on systems running Linux 6.19 (and later) which have the appropriate driver (hid_lg_15).

This project can either be used as a command-line application or as a rust library. This README mainly documents the command-line application. For information about the crate, please refer to the docs.

Features

• Static configuration using an ini-based configuration file:
  • Binding G keys to keypresses.
  • Giving each m key its own associated backlight color.
• Responding to keypresses from a Lua script:
  • The OnEvent function is called for each G or M key press or release.
  • Programatically press and release keys.
  • Programatically set the current M profile.
  • Programatically set the backlight color.
  • Support for other functions from the original G-series Lua API. Note that not all functions are supported.

Additionally, this project can be used as a Rust crate, which enables it to serve as a backend for other software which aims to leverage Linux's support for the G13.

Not Supported

• LCD
• Recording macros

Building & Installation

The following software needs to be available on your system:

• cargo & rust
• pkg-config
• libudev
• Lua (optional)

To build without Lua support: cargo build --release --bins --features bin To build with Lua X.Y support: cargo build --release --bins --features bin,handler_luaXY

udev rules

By default, the kernel will only allow root to access the leds and backlight of a G13. The udev rules found in the support directory work around this by allowing members of the input group to access these devices. Thus, after installation, you should:

• Ensure these rules are picked up by udev.
• Ensure the user running the application is a member of the input group.

Usage

Once installed, you can use the application as follows:

g13m -p profile_name

This will monitor your system for any connected G13s and map their keys according to your configuration in $XDG_CONFIG_HOME/g13m/profile_name.ini. If no profile name is provided, $XDG_CONFIG_HOME/g13m/default.ini will be used.

An example configuration file can be found in the support directory.

Please refer to the (upcoming) man page for more information.