linux-kernel - Re: Question on syslogd and syslog

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Message-ID: <CALyraeO1N3rvtHkRd9YWWV6azg-Y42dM3W9ytwo-nV4Rik3=9g@mail.gmail.com>
Date:	Sun, 3 Jul 2011 13:54:07 -0400
From:	Sri Ram Vemulpali <sri.ram.gmu06@...il.com>
To:	david@...g.hm
Cc:	linux-kernel-mail <linux-kernel@...r.kernel.org>,
	linux-newbie@...r.kernel.org
Subject: Re: Question on syslogd and syslog

Facilities of syslogd are associated to a particular file. So, in my
application there are 20 tasks which needs to have a separate log file
for every task. So, mapping every task to one facility fills my
requirement. So, this is the reason I want to extend the facilities of
level LOGLOCAL0-7.

Coming to previous question, the purpose is to fulfill the above requirement.

Thanks,
Sri.

On Sat, Jul 2, 2011 at 1:23 PM,  <david@...g.hm> wrote:
> the problem is that in the syslog spec, the facility and severity get
> combined into one 8 bit field (one of the two only has 12 values defined
> instead of 16, but I don't remember off the top of my head which one)
>
> so extending this is creating a new protocol.
>
> also, the reason I was talking about filtering is that other than filtering,
> what purpose is there in settng the facility?
>
> David Lang
>
> On Sat, 2 Jul 2011, Sri Ram Vemulpali wrote:
>
>> Thanks for the replies. My question is more on how to extend
>> facilities, rather on how to filter the messages. It seems there is a
>> code in the toolchain syslog.h where the array representing the
>> facilities needs to be extended. Please correct me if I am wrong.
>>
>> Sri.
>>
>> On Tue, Jun 28, 2011 at 3:41 PM,  <david@...g.hm> wrote:
>>>
>>> you would be creating a completely different over-the-wire protocol for
>>> your
>>> syslog messages.
>>>
>>> however, note that newer syslog daemons (syslog-ng and rsyslog for
>>> example)
>>> allow you to do filtering on just about anything in the message, not just
>>> the facility and severity.
>>>
>>> David Lang
>>>
>>> On Tue, 28 Jun 2011, Sri Ram Vemulpali wrote:
>>>
>>>> Date: Tue, 28 Jun 2011 14:11:59 -0400
>>>> From: Sri Ram Vemulpali <sri.ram.gmu06@...il.com>
>>>> To: linux-kernel-mail <linux-kernel@...r.kernel.org>,
>>>>    linux-newbie@...r.kernel.org
>>>> Subject: Question on syslogd and syslog
>>>>
>>>> Hello All,
>>>>
>>>>   I am looking to modify number of facilities available in syslog so
>>>> that for my application I can have much more array of them at disposal
>>>> of my need. So currently only LOG_LOCAL0 - LOG_LOCAL7 are defined for
>>>> user, what if I want to extend them, is there a way I can extend them.
>>>> Or should I go ahead and modify the source code of syslog. Can any
>>>> please point me in right direction and where can I get syslogd and
>>>> syslog source code. Thanks in advance.
>>>>
>>>>
>>>
>>
>>
>>
>



-- 
Regards,
Sri.
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