From: Patrick Oppenlander <pattyo.lists@gmail.com>
To: musl@lists.openwall.com
Subject: Re: detect timezone changes by monitoring /etc/localtime (like glibc)
Date: Tue, 13 Jun 2017 09:08:15 +1000 [thread overview]
Message-ID: <4c950249-6330-543c-4279-3291bf4ead58@gmail.com> (raw)
In-Reply-To: <20170609121502.GO1627@brightrain.aerifal.cx>
On 09/06/17 22:15, Rich Felker wrote:
> On Fri, Jun 09, 2017 at 05:15:40PM +1000, Patrick Oppenlander wrote:
>> During some recent testing I came across a bug when adjusting timezones on an
>> embedded system by changing /etc/localtime. The cause ended up being a
>> behavioural difference between glibc and musl.
>
> This difference is intentional; I believe there are past discussions
> in the list archives.
>
I found https://marc.info/?l=musl&m=141374003126007&w=2 which was helpful.
Performance could be addressed (inotify?) but it's all moot anyway given
the other issues mentioned.
>
> In order for asynchronous timezone changes to be safe, the API would
> have to be such that you make one call to get the current timezone,
> then pass it as an argument to functions depending on the timezone, so
> that the application has control of which timezone is getting used in
> each call.
>
This is how the WIN32 API is implemented.
Patrick
next prev parent reply other threads:[~2017-06-12 23:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 7:15 Patrick Oppenlander
2017-06-09 12:15 ` Rich Felker
2017-06-10 3:36 ` A. Wilcox
2017-06-10 9:57 ` u-uy74
2017-06-10 12:23 ` Rich Felker
2017-06-10 13:23 ` u-uy74
2017-06-12 23:08 ` Patrick Oppenlander [this message]
2017-06-12 23:19 ` Rich Felker
2017-06-12 23:49 ` Patrick Oppenlander
2017-06-12 23:58 ` Rich Felker
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