It's quite possible to build and use sudo without PAM support even on Linux, most distributions just tend to build everything in "kitchen sink" mode. If I remem

It's quite possible to build and use sudo without PAM support even on Linux, most distributions just tend to build everything in "kitchen sink" mode. If I remember right on Alpine it's PAM-free by default so it doesn't need to fork. On Gentoo it's behind a USE flag.