This repo is mostly an updated version of https://github.com/johalun/echo

It has been updated to Rust 2021 with new bindings to the kernel headers and tested with Rust version 1.64.0-nightly (b1dd22e66 2022-07-09)

For more information, see the accompanying blog post.

• Install Rust via Rustup
• rustup component add rust-src
• Generate the kernel bindings:

cargo build -p kernel-sys --target x86_64-unknown-freebsd

./build.sh
sudo make load
echo "hi rust" > /dev/rustmodule
cat /dev/rustmodule
sudo make unload

This source code is provided under the terms of the BSD 2-Clause licence and is based on public-domain work by Johannes Lundberg.