HP3000-L Archives

April 2003, Week 1

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Subject:
Re: [HP9000-L] Betr.: [HP9000-L] System Recovery for HP-UX system
From:
Keven Miller <[log in to unmask]>
Reply To:
Keven Miller <[log in to unmask]>
Date:
Tue, 1 Apr 2003 12:00:27 -0700
Content-Type:
text/plain
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text/plain (56 lines) 
I just got an interesting email about time skewing on HPUX.
Much like our setclock ;gradual for things like daylight savings time.

I don't know enough about HPUX and whether a command is provided
to do this, but this person has written one of his own.

Its written in old K&R C and needs D_HPUX_SOURCE to compile.
But seems to work alright on HPUX 11i.

___________________________________________________________________
Keven Miller   mailto:[log in to unmask]   http://www.exegesys.com


-----Original Message-----
From: Andy Cranston [mailto:[log in to unmask]]
Sent: Tuesday, April 01, 2003 11:49 AM
To: [log in to unmask]
Subject: Re: [UNIX-WIZ] Spring Forward / Fall Back


...
If your up for a mind twisting solution then you could set your timezone to
not use daylight savings at all.  On the required two dates a year you
could use my skewtime utility:

    http://www.readout.fsnet.co.uk/cprog/skewtime.htm

to slowly move the time forward or back one hour as appropriate.

This approach is untested and comes with no warranty BTW :-)  Don't even
think about using it on andy sort of production or otherwise critical
system!!!

This thread raises some interesting points.  The UNIX operating system has
got timezones and daylight savings changes pretty much in the bag but how
does a time critical application which has to deal with timezones (e.g. an
air traffic control system) cope with the underlying operating system
changing the time forward or backward one hour with no real warning?
...

Regards,

Andy Cranston.

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