Local timezone check doesn't follow symlinks

[drinckes]

_load_local_tzinfo() loads timezone files from /usr/share/zoneinfo/posix, and uses os.walk() to list the files.

But by default os.walk doesn't follow symlinks, so if the timezone files in /usr/share/zoneinfo/posix are symlinks to other locations (which doesn't seem terribly rare), those files won't be read in.

This can result in failing to load a timezone that matches /etc/timezone.

[drinckes]

One possible solution is to add the follow_symlinks=True as a parameter to os.walk, accepting the risk that this might never complete on it's own as os.walk doesn't track the directories it visits.

https://docs.python.org/3/library/os.html#os.walk

Note Be aware that setting followlinks to True can lead to infinite recursion if a link points to a parent directory of itself. walk() does not keep track of the directories it visited already.

Python documentation

os — Miscellaneous operating system interfaces

Source code: Lib/os.py This module provides a portable way of using operating system dependent functionality. If you just want to read or write a file see open(), if you want to manipulate paths, s...