A quickly written software to convert button push on a Joycon (Nintendo Switch controller) to a regular key-press in order to pass on the next slide on Libreoffice.

Build with cargo build -r, run target/release/joycon2click.

Run Libreoffice (or anything using left and right) in full screen.

Once the Joycon is connected, the triggers (L, R, ZL, ZR) and buttons on the right (right arrow on the Dpad for left Joycon, A for the right Joycon) will go to the next slide, and Y and Left arrow will go back to the previous slide by pushing Left and Right.

The system requires write access to /dev/uinput, which requires root access.

The easiest is to use chmod o+rw /dev/uinput, but this is a blunt fix.

A more restricted fix would be: setfacl -m u:$(id -un):rw /dev/uinput, which restrict uinput to the current user.

Be aware that opening uinput this way mean that any software can start injecting key press. For example, a malware could type commands when you are using a terminal, etc.

A last potential fix is to start the software as root and use the option -u someuser to switch to a unprivileged user after /dev/uinput is opened. Make sure to switch to either the user on the console, or a user in the input group.

By default, the program will not limit itself in anything.

At build time, you can choose between 2 experimental back-end for self confining, with features landlock andseccomp. Both are incomplete for now. You can disable the sandboxing at run time using --disable-sandbox.

Only 1 joycon is supported (usually, the 1st one attached, but no guarantee on that). Multiple joycons support is out of scope.

If the joycon is disconnected, nothing happen. If it reconnect, the software will stop, unless if -b is given on the command-line.

Due to lack of hardware, I was not able to test with Switch 2 joycons.

A few people have wrote software similar to that one, I list them here for reference:

• https://github.com/HonbraDev/joyclicker-rs