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Date:      Tue, 11 Nov 2014 13:57:40 -0500
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-current@freebsd.org, lev@freebsd.org
Cc:        FreeBSD Current <current@freebsd.org>
Subject:   Re: Changing timezone without reboot/restarting each service?
Message-ID:  <201411111357.40061.jhb@freebsd.org>
In-Reply-To: <5460B143.6080206@FreeBSD.org>
References:  <5460B143.6080206@FreeBSD.org>

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On Monday, November 10, 2014 7:36:19 am 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 :(

In practice, timezone changes are very rare, so rechecking the file is
quite expensive to do.  I think having to restart processes is fine for this.

-- 
John Baldwin



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