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Message-Id: <CQFSLI2OLWBI.3K2TRYXR8IECT@sumire>
Date: Sat, 11 Feb 2023 15:10:40 +0100
From: "alice" <alice@...ya.dev>
To: <musl@...ts.openwall.com>
Cc: "yubing (C)" <yubing12@...wei.com>, "liudongxu" <liudongxu3@...wei.com>,
 "wangyunhe (A)" <wangyunhe@...wei.com>, "qiuguorui"
 <qiuguorui1@...wei.com>, "Wanglieming (VRP SSP)" <wanglieming@...wei.com>
Subject: Re: Time zone has not updated after call tzset()

On Sat Feb 11, 2023 at 7:53 AM CET, zhoujingqiang (A) wrote:
> Hello,
>
> Normally, /etc/localtime is a soft link to a file that stores time zone
> information.
>
> Without setting the TZ environment variable, I change the time zone by
> changing the file linked to /etc/localtime. After calling tzset(), I find that
> the time zone does not change. The test code is as follows:

musl does not support changing the timezone while running.
see https://www.openwall.com/lists/musl/2017/06/09/9 ,
for a response to an identical bug report

tl;dr without semantics: you have to restart a running process to get a new
timezone.

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