Set TZ environment variable when not set
bon at elektron.ikp.physik.tu-darmstadt.de
Thu Apr 17 16:41:14 CDT 2003
>>>>> "Uwe" == Uwe Bonnes <bon at elektron.ikp.physik.tu-darmstadt.de> writes:
>>>>> "Rein" == Rein Klazes <rklazes at xs4all.nl> writes:
Rein> On Thu, 17 Apr 2003 09:57:43 +0200, you wrote:
>>> Okay, I see. But the qllink.dll/synplify.exe behaviour shows we
>>> have some TZ environement variable dependancy in the wine time
>>> handling code. Any help to fix this is welcome.
Rein> Just to help the discussion: a "getenv("TZ") on my win2000 test
Rein> system returns NULL, neither is TZ available in a command
Rein> window. So I guesss your applications would fail here as well. Or
Rein> are they perhaps restricted to win9x/DOS systems?
Uwe> Well, the application works on win32 with TZ not set. But is then
Uwe> sets TZ to GMT0 and spawns off a second process. When comparing a
Uwe> "magic string" generated from some time value in both processes,
Uwe> things go astray.
Uwe> Obvious the wine time related functions work different in the first
Uwe> process with TZ not set and in the second process with TZ set to
Uwe> GMT0. I'll have to work out...
It boils down that RtlQueryTimeZoneInformation uses (Linux) C Library
functions that honor TZ, while the Win32 implementation ignores TZ.
Temporaryly disabling TZ in ntdll/time.c:TIME_GetBias() provides a
workaround, while not disturbing other code pathes.
However Win32 fetches the tzinfo values from
I can fill tzinfo from those registry values, but two questions arise:
- How do we fill the Registry on Wine installation with those values (there
are a zillion timezones) for a no-win install. timedate.cpl isn't
available on a no-win install neither...
- Do we need a fallback? Should the present implementation be used in that
case? With the TZ workaround?
B.t.w: I had a test suite the used GetTimeZoneInformation. However this only
affects time calls in msvcrt, the underlying Linux C-Library didn't see that
change and so the results didn't differ. Argh ...
Uwe Bonnes bon at elektron.ikp.physik.tu-darmstadt.de
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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