Subject: Re: TIMEZONE and DST - obsolete?
To: None <>
From: Gordon W. Ross <>
List: current-users
Date: 03/04/1996 12:00:30
> From: Paul Kranenburg <>
> Date: Sun, 3 Mar 1996 00:54:33 +0100 (MET)

> > Following it through the system, only sys_settimeofday and sys_gettimeofday
> > in kern_time.c seem to use the tz variable that holds their values, and I
> > guess it only makes a difference if the time of day is gotten before it gets
> > setten..  I can't quite work that out though (I thought it was all done in
> > /etc/localtime but that might come later)
> It is obsolete. All userland utilities should use `/etc/localtime' (see
> ctime(3) [gs]ettimeofday(2) also warns that the `struct timezone'
> argument is no longer used. The kernel still maintains some degree of
> compatibility, but, as you note, no sane kernel configuration file actually
> specifies its geographical whereabouts, the information might not be
> accurate.
> I guess it's time to make the kernel config options entirely optional.
> -pk

Doesn't the kernel use TIMEZONE when reading the hardware clock?
This would let you (for example) keep the hardware clock set to
local time on a PC without the kernel assuming it was GMT.