Date: Mon, 20 Oct 1997 11:00:01 -0700 (PDT) From: Martin Cracauer <cracauer@wavehh.hanse.de> To: freebsd-bugs Subject: Re: conf/4751: sendmail writing to old maillogs after rotation Message-ID: <199710201800.LAA09444@hub.freebsd.org>
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The following reply was made to PR conf/4751; it has been noted by GNATS.
From: Martin Cracauer <cracauer@wavehh.hanse.de>
To: Peter Wemm <peter@netplex.com.au>
Cc: Martin Cracauer <cracauer@cons.org>, jbrogan@reply.net,
freebsd-gnats-submit@freebsd.org
Subject: Re: conf/4751: sendmail writing to old maillogs after rotation
Date: Tue, 14 Oct 1997 12:42:59 +0200
Ops, Peter is of course just right here. Please ignore my comments,
they are applicable only if you use newsyslog to rotate logfiles from
a daemon that doesn't use syslog (i.e. apache).
In <199710140131.JAA24190@spinner.netplex.com.au>, Peter Wemm wrote:
> Martin Cracauer wrote:
> > In <199710131156.EAA17286@hub.freebsd.org>, jbrogan@reply.net wrote:
> > > Anyway, now when the maillogs are rotated as follows...
> > >
> > > ...
> > > maillog.0 ----> maillog.1
> > > maillog ----> maillog.0
> > >
> > > Just like it has always done. But now sendmail will start writing
> > > to maillog.0 instead of maillog where it's supposed to. In fact,
> > > I've even found times when it's writing to maillog.2 or even
> > > maillog.3. And when I actually *rename* a maillog it is writing
> > > to.... it will write to that renamed version! Real neat, but not
> > > good.
> >
> > If you rename a file that is opened by a process, the file pointer
> > inside that process will still point to the original file.
> >
> > daemons are supposed to reopen their log file on `kill -HUP` and
> > scripts that rename logfiles are supposed to send -HUP to the daemon
> > in question.
> [..]
> > John, if you have some time, could you please add
> > "/var/run/sendmail.pid" as the last field to your /etc/newsyslog.conf,
> > *not* enable compression and see if that solves your problem? Maybe
> > you could test this for other lines in newsyslog.conf as well?
>
> Umm, no.. Sendmail does not write to log files. It sends log messages to
> syslogd via the /var/run/log socket. syslogd needs the kill -HUP, not
> sendmail. Do *not* put /var/run/sendmail.pid into newsyslog.conf, that
> will cause something completely different... (a kill -HUP to sendmail will
> cause it to shutdown and re-exec itself)
>
> newsyslog(8) automatically sends a HUP signal to syslogd after rotation and
> before compression. If you move the mail log rotation elsewhere, you need
> to add back the explicit kill -HUP to syslogd again.
>
> You can change the /etc/crontab entry that calls newsyslog so that it only
> runs at 12:01am if you want. You can also remove the 'Z' flag on the
> maillog line if you want to keep uncompressed mail logs. Surely that
> would be simpler...
>
> Cheers,
> -Peter
> --
> Peter Wemm <peter@netplex.com.au> Netplex Consulting
>
>
--
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