What does good, modern c code look like?
c
Solution
Dave Hanson's C Interfaces and Implementations is a very well-crafted library of about 7000 lines of code. The book is great if you can afford it.
The implementation of the Lua programming language and libraries is about 17,000 lines of C code and is very well done but quite sophisticated in places—compilers and garbage collectors are not so easy to understand without background in those fields. But the code is beautifully engineered.
Git is over 125,000 lines of code. I can't recommend that anyone study it as an example of how to engineer C code. Just the design and public interfaces, let alone the implementations, are hard to understand—which is why there are so many git tutorials.
Problem
I'm primarily a c#/.NET programmer, but the hobby project that I am about to take on will involve coding in c. I know that there is a ton of c code out there, but its very hard to separate a well structured c project from a badly structured project if you did not "grow up" with the language. Can anyone point me toward a newer, non trivial (but not enormous) project that is considered a good example of how to structure c code? Edit If you cannot find a project, feel free to discuss in words how you think a c project should be structured.