Re: epics vxworks time off by 1 hour

[Kay-Uwe Kasemir <kasemirk@ornl.gov>]

Hi:

On Sep 7, 2007, at 17:02 , Dennis Nicklaus wrote:
> putenv "TIMEZONE=PSTPDT::480:031102:110402"
> putenv "EPICS_TS_MIN_WEST=480"
> I'm really in the Central time zone, but I thought I would make it  
> think I was Pacific time, just
> to see what happens.

Just 2 for what it's worth notes:
The 'PSTPDT' doesn't seem to matter,
  only the numbers (480 etc.) count

We had some very strange problems when we set TIMEZONE.
When instead setting EPICS_TIMEZONE,
which the IOC startup code then copies to TIMEZONE,
all was fine.
But when setting TIMEZONE before iocInit,
the osiTime code that tries to determine the correct offset
from 1970 to 1990 broke, because some of the vxWorks routines
ignore the 'dst' flags.
In older EPICS releases, that timezone offset was a constant,
but newer releases try to determine it by converting back and forth
between local and GMT/UTZ, and that failed for us when TIMEZONE
was set.
Anyway, maybe just try defining EPICS_TIMEZONE, don't set TIMEZONE
yourself, and see if that's better.

-Kay