musl - do_tzset() prevents reusing the same name of a timezone file

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Message-ID: <CA+QjRn+=hf5kPUn80SNN3=Kygf=fBK=zeD7-zL9C=A94ES2WkA@mail.gmail.com>
Date: Sat, 18 Oct 2014 00:20:05 +0400
From: Королев Сергей <korolev.sergey@...il.com>
To: musl@...ts.openwall.com
Subject: do_tzset() prevents reusing the same name of a timezone file

Hi, all.

I have a question about do_tzset() function implementation (musl v1.1.5).
The function has the following conditions to prevent timezone file remapping

if (old_tz && !strcmp(s, old_tz)) return;

which do not allow to use "TZ" environment variable pointing to the same
file (e.g. /etc/localtime). But some distros replace this file directly or
use it as a symlink.

Is this limitation a bug or a feature?

Thanks.

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