Re: [ptxdist] PTXdist klogd and syslogd

[dave festing <dave_festing@hotmail.com>]

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Thank you for the elaboration.

Cheers,
Dave

> From: jbe@pengutronix.de
> To: ptxdist@pengutronix.de
> Date: Thu, 21 Nov 2013 14:26:00 +0100
> CC: dave_festing@hotmail.com
> Subject: Re: [ptxdist] PTXdist klogd and syslogd
> 
> Hi Dave,
> 
> On Wednesday 20 November 2013 15:07:59 Jürgen Beisert wrote:
> > On Wednesday 30 October 2013 09:28:36 Dave wrote:
> > > When you select both Busybox syslogd and Busybox klogd you get the
> > > message "klogd should not be used together with syslog to kernel printk
> > > buffer".
> > >
> > > At first I thought this meant you can't use both logging facilities at
> > > the same time.  However, PTXCONF_BUSYBOX_SYSLOGD help says "when used in
> > > conjunction with klogd ...
> > >
> > > I would expect that if you could not use both at the same time then
> > > menuconfig would have the necessary rules to ensure that you didn't.
> > >
> > > Would someone explain in more detail what that message is trying to
> > > convey?
> >
> > You mean this message in the menuconfig?
> >
> >  [*] syslogd
> >    [....]
> >  [*]   Linux kernel printk buffer support
> >  [*] klogd
> >  ---   klogd should not be used together with syslog to kernel printk buffer <---- this one? [ ]   Use the klogctl() interface
> >
> > This is because "Linux kernel printk buffer support" in 'syslogd' and
> > 'klogd' do the same.
> 
> Ups, forget this description. They do not the same. This option just puts the
> logging data into the printk buffer. This would end in an endless loop. klogd
> grabs the data from the printk buffer, forwards it to the syslogd daemon,
> which forwards it again into the printk buffer. That is why this warning is
> shown in the menu.
> 
> If you want kernel messages in your logs, you need the klogd.
> 
> jbe
> 
> -- 
> Pengutronix e.K.                              | Juergen Beisert             |
> Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |
> 
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