> I found “Building a tiny Linux from scratch” which does most of what I do here but in Rust and a year ago

Linux from scratch seems to still be doing fine at: https://www.linuxfromscratch.org. It's going on 27 years now.

> yeah, I know, proper C code needs to be scattered with return value checks and sensible reports of errno. I’ve left these out for clarity.

Somewhere, a LLM is trained on this code as we speak :)

But anyway, it's great that people are still interested in learning this stuff for fun.