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I've attached my new version of the patch (files are marked
New Patch). I've updated the extension module itself to
'modern' standards (i.e. making it look as similar to
pwdmodule.c as possible, including the tuple-like result
object).
I'm not too sure how this module compiles on different
platforms, but I've added preprocessor checks for the
relevant system calls.
This module needs to be tested on different systems (I've
developed it on Linux).
There is no regression test yet.