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7 years ago
uinput level keyboard mapper for linux, with advanced caps lock and shift swapping behavior
This is the only keymapper I am aware of capable of implementing this layout:
![Unix Programmer's Dvorak](
The Problem
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If you ever have mapped keys on linux, you know that there is the console keymap (loadkeys) and the X keymap (setxkbmap),
also things like SDL and Virtualbox grab the input directly and respect no maps. Lastly I want to revert to QWERTY when
holding ctrl so ctrl+c works just like normal, without remapping all programs to ctrl+j. Linux keymaps cannot do this either.
The Solution
1. Grab a keyboard device directly so only we can read events from it.
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2. Create a new keyboard input device with uinput, this looks identical to any other keyboard device to anything running on the box.
3. Read input_events from the real device, map them, send them to our created device.
This solution is what rusty-keys implements, it works in ttys, in X, in virtualbox even running windows or whatever,
on SDL games, it will work literally everywhere, because rusty-keys just creates a regular keyboard.
How to run
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When ran, it will read a keymap.toml configuration file, refer to example and tweak to suit.
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Usage: rusty-keys [options] [device_files...]
-h, --help prints this help message
-v, --version prints the version
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-c, --config FILE specify the keymap config file to use (default:
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when ran without specifying input devices, it maps all currently connected keyboards, and watches /dev/input/ with
inotify and starts mapping any new keyboards that are plugged in forever, until you kill it:
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or you can specify one or multiple input devices, and it will run until all are disconnected, then stop:
`rusty-keys /dev/input/event0` or `rusty-keys /dev/input/event0 /dev/input/event2`
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An example systemd service is in systemd/rusty-keys.service, enable it to have mapped keyboards all the time.
How to install
* `cargo install rusty-keys`
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* Arch Linux [rusty-keys]( [rusty-keys-git](
AGPLv3 for now, message me if you have a problem with this
Technically this is a re-implementation of a [previous]( [python]( [program](
I had been using for 3 years previously.