"""On Solaris, we are patching (for many years now) `posix_closerange` function to use `fdwalk` to close file descriptors instead of a for loop. While for a long time only Solaris had `fdwalk`, but if I am not mistaken, some other OSes implement it today as well and as such others might be interested in this as well.

If you will like it, I can create an issue for that. Also, I am not sure whether `_fdwalk_close_func` needs a clinic part or if configure detection is sufficient this way - I am open to all comments and ideas and can rewrite it as needed ;).

""" - Jakub