Re: klibc and logging

From: H. Peter Anvin (hpa@zytor.com)
Date: Tue Aug 13 2002 - 12:41:03 EST


Followup to: <ajaka7$qb6$1@ncc1701.cistron.net>
By author: "Miquel van Smoorenburg" <miquels@cistron.nl>
In newsgroup: linux.dev.kernel
>
> In article <3D58B14A.5080500@zytor.com>,
> H. Peter Anvin <hpa@zytor.com> wrote:
> >However, I'm wondering what to do about logging. Kernel log messages
> >get stored away until klogd gets started, but early userspace may need
> >some way to log messages -- and syslog is obviously not running. The
> >easiest way to do this would probably be to be able to write to
> >/proc/kmsg (which probably really should be /dev/kmsg) and push messages
> >onto the kernel's message queue; but we could also have a dedicated
> >location in the initramfs for writing logs, and do it all in userspace.
>
> /dev/shm/log/ ?
>

Requires too much to work before it's can be made available.

Andrew Morton sent me a proposed patch last night which adds a klogctl
(a.k.a. sys_syslog) which does a printk() from userspace. It was less
than 10 lines; i.e. probably worth it. I have hooked this up to
syslog(3) in klibc, although the code is not checked in yet.

        -hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt	<amsp@zytor.com>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Thu Aug 15 2002 - 22:00:33 EST