how to configure printk() in 2.6 kernel

[Mirco Tischler]

2011/8/31 Vaibhav Jain <vjoss197 at gmail.com>:
> Thanks but didn't help :(
> My configurations in the rsyslog.conf file are still not working.
>
> I added the line
>
> kern.*         <filename in my home dir>
>
> but the file remains empty and teh kernel messages are not there even in the
> /var/log/messages file.
>
> Thanks
> Vaibhav Jain
>
>
>
> On Wed, Aug 31, 2011 at 1:29 PM, Jeff Haran <jharan at bytemobile.com> wrote:
>>
>>
>>
>>
>>
>> From: kernelnewbies-bounces at kernelnewbies.org
>> [mailto:kernelnewbies-bounces at kernelnewbies.org] On Behalf Of Vaibhav Jain
>> Sent: Wednesday, August 31, 2011 1:08 PM
>> To: Jonathan Neuschäfer
>> Cc: kernelnewbies at kernelnewbies.org
>> Subject: Re: how to configure printk() in 2.6 kernel
>>
>>
>>
>>
>>
>> On Tue, Aug 30, 2011 at 12:25 PM, Jonathan Neuschäfer
>> <j.neuschaefer at gmx.net> wrote:
>>
>> On Mon, Aug 29, 2011 at 04:38:03PM -0700, Vaibhav Jain wrote:
>> > On Mon, Aug 29, 2011 at 3:24 PM, Ramesh.P <rameshpa at gmail.com> wrote:
>> >
>> > > Hi Vaibhav,
>> > >
>> > > Try /etc/rsyslog.conf. However you should be using
>> > > /proc/sys/kernel/printk to really configure printk.
>> > >
>>
>> [snip]
>>
>> >
>> > Hi Ramesh,
>> >
>> > As I mentioned /etc/syslog.conf is not there on my system. Could you
>> > please
>> > tell me if the name has changed for the file in 2.6 kernel ? Also, does
>> > /proc/sys/kernel/printk provides for the same level of control ?
>>
>> Syslog is a user space program, that collects the kernel messages.
>> So if you don't have /etc/syslog.conf on your system, it likely just
>> means that you don't have a standard installation of the syslog program,
>> which can have different reasons. AFAIK, syslog has been replaced by
>> rsyslog or syslog-ng on modern desktop linux distros.
>>
>> BTW, Ramesh told you to try /etc/rsyslog.conf (note the 'r'), not
>> /etc/syslog.conf.
>>
>> HTH,
>>        Jonathan Neuschäfer
>>
>>
>>
>>
>>
>> Hi,
>>
>>
>>
>> Thanks for reply! I found the rsyslog.conf on my system. But
>>
>> I am finding it hard to configure it. Actually I made some changes but
>> they are not working.
>>
>> I made some changes to the kernel and wanted that they appear at either
>> the console or
>>
>> some other file. However the changes don't work.
>>
>> I tried adding the following  lines (one at a time)
>>
>>
>>
>> kern.*              /dev/console
>>
>>
>>
>> kern.*             <file in my home directory>
>>
>>
>>
>>
>>
>> but on making these changes other kernel messages also stop showing up.
>>
>>
>>
>> Can you please give me some idea as to why this might happen ?
>>
>>
>>
>> -Thanks
>>
>> Vaibhav Jain
>>
>>
>>
>> See if this helps:
>>
>>
>>
>> echo 7 > /proc/sys/kernel/printk
>>
>>
>>
>> Jeff Haran
To me it looks like rsyslog is trying to do the right thing but can't
write to the target file. Maybe selinux is preventing it from doing
so?

Mirco