https://github.com/apple-oss-distributions/xnu/tree https://github.com/apple-oss-distributions/xnu/tree You'll find there's a great deal left. Have a look at a

https://github.com/apple-oss-distributions/xnu/tree https://github.com/apple-oss-distributions/xnu/tree You'll find there's a great deal left. Have a look at all the fundamental datastructures (proc, vnode, tty, file to name a few) for a starting point.