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Date:      Sun, 28 Oct 2001 00:22:40 +0200 (CEST)
From:      Cyrille Lefevre <clefevre@citeweb.net>
To:        void <float@firedrake.org>
Cc:        Kris Kennaway <kris@obsecurity.org>, hackers@FreeBSD.ORG
Subject:   Re: syslogd and kqueue
Message-ID:  <200110272222.f9RMMeZ76727@gits.dyndns.org>
In-Reply-To: <20011027043342.A18231@parhelion.firedrake.org>

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void wrote:
> On Fri, Oct 26, 2001 at 08:04:36PM -0700, Kris Kennaway wrote:
> > On Fri, Oct 26, 2001 at 11:39:57PM +0100, void wrote:
> > > If syslogd used the kqueue interface, I believe it could open a new log
> > > file as soon as it was created, rather than waiting to receive a signal.
> > > Would this be worth doing, or would it be too big a divergence from the
> > > traditional behavior?
> > 
> > I assume you mean "as soon as the configuration file is modified"?
> > That would be a big violation of POLA.
> 
> No ...
> 
> The traditional log-rotation dance goes something like:
> 
> mv log log.0
> touch log

never do a mv/touch on a log file to avoid full filled file systems,
use cp instead...

cp log log.0
(there is a delta here which can be handled w/ tail -0 -f)
cp /dev/null log

this has the advantage to work w/ every daemons, even the ones wich
don't handle SIGHUP as well as simple redirections (daemon > log).

> kill -1 `cat /var/run/syslogd.pid`
> gzip log.0

Cyrille.
-- 
Cyrille Lefevre                 mailto:clefevre@citeweb.net

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