[Samba] Re: Wintertime/summertime difference - Samba servers show wrong time ?

Jeremy Allison jra at samba.org
Fri Nov 4 21:05:30 GMT 2005

On Fri, Nov 04, 2005 at 10:04:04PM +0100, Dragan Krnic wrote:
> Surprisingly few threads on this fascinating subject!
> (They're all in the Cc:) Only one solution proposed by Thomas 
> Honigman and Thomas Guenther. In a posting of Feb 8, this year, 
> they proposed conditioning the use of "kludge GMT", which is 
> what Samba marshals on the wire as GMT but which is wrong under 
> most circumstances involving daylight savings time switch, 
> upon the value of the boolean smb.conf option "use kludge gmt", 
> even using "TRUE" as default in order not to break the 
> compatibility.
> Can anyone tell why this 9-months old proposal was not accepted ?
> I've implemented their patches (but made FALSE the default,
> of course) and it solved my problems big way.
> The way it works now in the sources, Samba goes out of its way 
> to force Windows clients to see the file times the way Unix and 
> other more mature systems see them. If a file was modified at 
> noon 12:00:00 of any day, it shows 12:00:00 always, regardless 
> of the date on which it was modified or the date on which one 
> is beholding it. Samba does it by subtracting from the real GMT 
> in the timestamps the difference between "TimeDiff(timestamp)" 
> and "get_serverzone()", which means that it fakes the timestamp 
> GMT in such a way that Windows still see the right time and not 
> the wrong Windows time, which is actually what everybody wants 
> to see, so that pacemakers don't stop and rod injectors don't melt.
> Small details like this are show stoppers.

It's funny you should comment on this - I was in the middle
of moving to the Samba4 way of handling times and timezones
(back porting the Samba4 code to Samba3) to fix the timezone
problems people have. I was planning to get this into 3.0.21.

Would this fix the problem ? I'm expecting so, but would
appreciate more feedback.

I'll look back for the patch to remove the kludge GMT, but
I'd rather just remove it entirely and clean up the code.


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