Re: Changing timezone without reboot/restarting each service?

On Tue, Nov 11, 2014, at 13:16, Dimitry Andric wrote:
> On 11 Nov 2014, at 04:28, Mark Felder <feld_at_freebsd.org> wrote:
> > 
> > On Mon, Nov 10, 2014, at 06:36, Lev Serebryakov wrote:
> >> 
> >> After changing timezones in Russia (with replacing /etc/localtime
> >> with new file), I found that cron works in "old" timezone till
> >> restart. And all other services do the same, but cron is most obvious
> >> here :)
> >> 
> >> Looks like libc reads timezone only once and it could not be chamged
> >> for process without restart (which leads to, effectivly, restart of
> >> whole server).
> >> 
> >> Is it known problem? I think, it should be fixed somehow. I
> >> understand, that re-check timezone file on each time-related call
> >> could be expensive, though :(
> >> 
> > 
> > I think this was one of the crowning achievements of systemd, but I'm
> > sure someone can come up with something much more sane than that to
> > address this problem.
> 
> Actually, it isn't:
> http://www.freedesktop.org/wiki/Software/systemd/timedated/
> 
> This reads "Note that this service will not inform you about system time
> changes. Use timerfd() with CLOCK_REALTIME and TFD_TIMER_CANCEL_ON_SET
> for that."
> 
> So it mostly looks like a shared service to provide the graphical time
> control panel for GNOME.
> 

Aha, I guess the article I read was as reliable as jamming all that code
into PID 1. :-)