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Re: tzcode or glib2 bug?



You could cd /usr/src/external/public-domain/tz/share/zoneinfo, edit
the Makefile to change TZDIR and add -b fat to the TOOL_ZIC invocations.
That would build all zones to the new directory.

christos

> On Feb 10, 2020, at 4:17 PM, Thomas Klausner <tk%giga.or.at@localhost> wrote:
> 
> On Mon, Feb 10, 2020 at 09:08:18PM -0000, Christos Zoulas wrote:
>> In article <20200210172958.azwyzrq3d773gm56@danbala>,
>> Thomas Klausner  <tk%giga.or.at@localhost> wrote:
>>> -=-=-=-=-=-
>>> 
>>> Hi!
>>> 
>>> Some weeks/months ago I noticed that some tools displayed the wrong
>>> time, one hour in the future (right now, on 9.99.46/amd64)
>>> 
>>> I've tracked this down to those using glib2 and wrote a small test
>>> program.
>>> 
>>> # gcc test.c `pkg-config --cflags glib-2.0` `pkg-config --libs glib-2.0`
>>> # ./a.out; date
>>> local time: 19:22:59
>>> UTC time: 17:22:59
>>> Mo. Feb. 10 18:22:59 CET 2020
>>> 
>>> I have /etc/localtime symlinked:
>>> 
>>> lrwxr-xr-x  1 root  wheel  33 May 31  2019 /etc/localtime ->
>>> /usr/share/zoneinfo/Europe/Vienna
>>> 
>>> (and this is handled correctly by glib2) but it doesn't work with
>>> explicitly given TZ environment variable either.
>>> 
>>> # TZ=Europe/Vienna ./a.out; TZ=Europe/Vienna date
>>> local time: 19:24:45
>>> UTC time: 17:24:45
>>> Mo. Feb. 10 18:24:45 CET 2020
>>> 
>>> Other timezones work:
>>> 
>>> # TZ=EST ./a.out; TZ=EST date
>>> local time: 12:24:35
>>> UTC time: 17:24:35
>>> Mo. Feb. 10 12:24:35 EST 2020
>>> 
>>> Is there something weird in NetBSD's version of tzcode (I see we have
>>> quite some changes) and we notice because glib2 has its own parser, or
>>> is it a bug in glib2?
>>> 
>>> (I debugged it into glib2 and found that it identifies the timezone
>>> correctly from the symlink and then calls init_zone_from_iana_info(),
>>> see
>>> https://github.com/GNOME/glib/blob/mainline/glib/gtimezone.c#L522.)
>> 
>> If you zic -b the zone does it work?
> 
> How would I do that as a one-off test?
> 
> Thomas

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