Re: tzcode or glib2 bug?

[Thomas Klausner <tk%giga.or.at@localhost>]

Filed it here:

https://gitlab.gnome.org/GNOME/glib/issues/2032

On Tue, Feb 11, 2020 at 09:49:03AM +0100, Thomas Klausner wrote:
> Hi!
> 
> Thanks.
> 
> With fat files:
> 
> # TZ=/usr/share/zoneinfo-test/Europe/Vienna date; TZ=/usr/share/zoneinfo-test/Europe/Vienna ./a.out
> Di. Feb. 11 09:47:29 CET 2020
> local time: 09:47:29
> UTC time: 08:47:29
> 
> Compared to before:
> # TZ=/usr/share/zoneinfo/Europe/Vienna date; TZ=/usr/share/zoneinfo/Europe/Vienna ./a.out
> Di. Feb. 11 09:47:44 CET 2020
> local time: 10:47:44
> UTC time: 08:47:44
> 
> So this seems to be the issue, and I'll raise a glib2 bug report now.
> 
> Thanks,
>  Thomas
> 
> On Mon, Feb 10, 2020 at 07:57:45PM -0500, Christos Zoulas wrote:
> > 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
> > 
> 
>