This is a barebones Kotlin/Native Linux application that uses C interoperability to link against the native ncurses library and display a simple full-screen message. A systemd service unit template is provided that can run the application against any tty on the system. A simple Vagrantfile is provided that will spin up Debian Stretch, compile the application, and run it on tty1 and ttyS0.
Install vagrant and a suitable provider
(VirtualBox, libvirt, etc.). Then simply run vagrant up. Once the provisioning
script has completed you should see Press any key to exit! both on the video
terminal of the virtual machine and the serial console.