That's a fair point, and shelling out to
id is probably a good solution.
I guess what bothers me is the software authors who don't think this through, leaving applications non-functional in these situations.
At least with Go, if you do CGO_ENABLED=0, and you use the stdlib functions to resolve user information, you end up with parsed /etc/passwd instead of shelling out to id. The Go stdlib should maybe shell out to id instead, but it doesn't. And it's understandable that software developers use the stdlib functions without thinking all too much about it. But in the end, simply advocating for CGO_ENABLED=0 results in software that is broken around the edges.
