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From: pc123@cus.cam.ac.uk (Pete Chown)
Subject: Re: bsd has wrong date (-1 day)
In-Reply-To: bde@runx.oz.au's message of Wed, 24 Feb 93 00:08:04 GMT
Message-ID: <PC123.93Feb25224619@bootes.cus.cam.ac.uk>
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References: <hg926cy.730393047@unidui> <PC123.93Feb22211035@bootes.cus.cam.ac.uk>
<1993Feb24.000804.19805@runx.oz.au>
Date: Thu, 25 Feb 1993 22:46:22 GMT
Lines: 50
In article <1993Feb24.000804.19805@runx.oz.au> bde@runx.oz.au (Bruce Evans) writes:
I'm not sure what Pete means by "timezone file".
I mean /usr/othersrc/share/zoneinfo/europe (or whatever your continent
is). If you install the software timezone support, you can make
changes without having to fudge the kernel.
For the kernel, the timezone adjustment should be made
to the kernel config file (+- 24 hours).
Probably you can do this as well - I don't know.
>Incidentally the timezone module assumes you have (I think) Pacific
>time set in your CMOS, and want this corrected before being used. In
It assumes GMT.
Perhaps the kernel assumes GMT. I can't remember what it was like
before I installed the timezone code. Certainly the software module
assumes Pacific time, though, because I had no end of trouble
convincing it that I wanted the letters GMT appended to times, but did
not want any offset adding to the CMOS clock time. If it had assumed
GMT, I could have just put a zero there.
2. Local time file (/etc/localtime). This contains data to convert from
kernel time (GMT) to local time. Usually it is a symlink to a timezone
file for your locality. You have to change the symlink when installing
the system.
Mmm. By compiling your timezone file.
Getting the kernel timezone adjustment right is too hard. There are good
reasons why the timezone database is so large. For adjusting from local
time to GMT, I suggest the following method:
a. For booting the kernel, assume the clock is on GMT.
b. In /etc/rc, run a utility to correct the kernel time by the difference
between local time and GMT.
No - it's quite possible to get it right. You don't have to edit the
kernel, you just change the appropriate file under .../zoneinfo, and
you are away.
You seem to be saying that I am wrong about how to change the
timezone! But I'm not, because it worked!
--
---------------------------------------------+ "A tight hat can be stretched.
Pete Chown, pc123@phx.cam.ac.uk (Internet) | First damp the head with steam
pc123@uk.ac.cam.phx (Janet :-) -+ from a boiling kettle."