forked from drath/libratbag
149 lines
5.4 KiB
Markdown
149 lines
5.4 KiB
Markdown
libratbag
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=========
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libratbag is a configuration library for gaming mice. It provides a generic
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way to access the various features exposed by these mice and abstracts away
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hardware-specific and kernel-specific quirks.
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libratbag exports the devices over a DBus daemon called **ratbagd**, see the
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[ratbagd DBus Interface description](DBusInterface.md).
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Compiling libratbag
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-------------------
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libratbag uses the [meson build system](http://mesonbuild.com) which in
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turn uses ninja to invoke the compiler. Run the following commands to clone
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libratbag and initialize the build:
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git clone https://github.com/libratbag/libratbag.git
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cd libratbag
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meson builddir --prefix=/usr/
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And to build or re-build after code-changes, run:
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ninja -C builddir
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sudo ninja -C builddir install
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Note: `builddir` is the build output directory and can be changed to any
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other directory name. To set configure-time options, use e.g.
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mesonconf builddir -Denable-documentation=false
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Run `mesonconf builddir` to list the options.
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Running ratbagd as DBus-activated systemd service
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-------------------------------------------------
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To run ratbagd, simply run it as root `sudo ratbagd`. However,
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ratbagd is intended to run as dbus-activated systemd service and installs
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the following files:
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/usr/share/dbus-1/system.d/org.freedesktop.ratbag1.conf
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/usr/share/dbus-1/system-services/org.freedesktop.ratbag1.conf
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/usr/share/systemd/system/ratbagd.service
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These files are installed into the prefix by `ninja install`, see also the
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configure-time options `-Dsystemd-unit-dir` and `-Ddbus-root-dir`.
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Developers are encouraged to simply symlink to the files in the git
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repository.
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For the files to take effect, you should run
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sudo systemctl daemon-reload
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sudo systemctl reload dbus.service
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And finally, to enable the service:
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sudo systemctl enable ratbagd.service
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This places the required symlink into the systemd directory so that dbus
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activation is possible.
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libratbag Internal Architecture
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-------------------------------
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libratbag has two main components, libratbag and ratbagd.
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The former is a library to access the devices. It consists of
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the front-end API and wrapper code, and the back-end HW-specific drivers:
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+-----+ +-----+ +-----------+ +----------+
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| app | -> | API | -> | hw-driver | -> | protocol | -> device
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+-----+ +-----+ +-----------+ +----------+
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The API layer is HW agnostic. Depend on the HW, the protocol may be part of
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the driver implementation (e.g. etekcity) or a separate set of files
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(HID++). Where the protocol is separate, the whole known protocol should be
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implemented. The HW driver then only accesses the bits required for
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libratbag. This allows us to optionally export the protocol as separate
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library in the future, if other projects require it.
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Adding Devices to libratbag
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---------------------------
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As of commit 3605bede4 libratbag now uses a hwdb entry to match the device
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with the drivers. To access a device through libratbag, the udev property
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RATBAG_DRIVER must be set for a device's event node. Check with
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sudo udevadm info /sys/class/input/eventX | grep RATBAG_DRIVER
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If your device is not yet assigned the property, it is not in the hwdb. It
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may however be supported by one of our existing drivers. Try enabling it by
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adding the device vendor-id/product-id to the hwdb file in
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`hwdb/70-libratbag-mouse.hwdb`. For example, for a HID++ 1.0 device, edit
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the 70-libratbag-mouse.hwdb file and add an entry with `RATBAG_DRIVER=hidpp10`.
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For the other drivers, look for the id of the driver in driver-{drivername}.c
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file and do the same.
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Once your device is added to the hwdb, install libratbag and trigger a hwdb
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update:
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sudo udevadm hwdb --update
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sudo udevadm control --reload
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Then unplug/replug your mouse. `RATBAG_DRIVER` should appear in the udev
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properties of your device with the value you previously set. If the property
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is not assigned, the hwdb entry does not correctly match your device or the
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installed udev rules/hwdb entries are not picked up by udev.
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If the device doesn't work, you'll have to start reverse-engineering the
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device-specific protocol. Good luck :)
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Source
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------
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git clone https://github.com/libratbag/libratbag.git
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Bugs
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----
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Bugs can be reported in the issue tracker on our github repo:
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https://github.com/libratbag/libratbag/issues
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Mailing list
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------------
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libratbag discussions happen on the input-tools mailing list hosted on
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freedesktop.org: http://lists.freedesktop.org/archives/input-tools/
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Device-specific notes
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---------------------
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A number of device-specific notes and observations can be found in our
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"device-notes" repository: http://libratbag.github.io/device-notes/
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License
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-------
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libratbag is licensed under the MIT license.
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> Permission is hereby granted, free of charge, to any person obtaining a
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> copy of this software and associated documentation files (the "Software"),
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> to deal in the Software without restriction, including without limitation
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> the rights to use, copy, modify, merge, publish, distribute, sublicense,
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> and/or sell copies of the Software, and to permit persons to whom the
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> Software is furnished to do so, subject to the following conditions: [...]
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See the COPYING file for the full license information.
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[](https://circleci.com/gh/libratbag/libratbag)
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