linux-kernel - Re: [PATCH] console logging detour via printk

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Date:	Sat, 1 May 2010 11:00:22 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Samo Pogacnik <samo_pogacnik@....net>
Cc:	linux-embedded <linux-embedded@...r.kernel.org>,
	linux kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] console logging detour via printk

On Sat, May 1, 2010 at 00:03, Samo Pogacnik <samo_pogacnik@....net> wrote:
> while i was searching for effective logging of complete console output
> produced by the kernel and user phase of the boot process, it turned out
> that only kernel messages imho get systematically cached and stored into
> log files (if needed). All userspace processes are on their own to use
> syslog, which is fine, but there are also many console messages
> reporting the boot status via init scripts, .... I came across the
> bootlogd daemo, which handles the job of redirecting console output into
> a log file, but i find it problematic to use especialy, when using
> initial ram disk image.
>
> So in short i came up with an idea to transform console writes into
> printks at appropriate code place of some console drivers (the patch
> includes code for VT console and SERIAL_CORE console drivers). Printks
> eventually reach console device avoiding the patched part of the console
> drivers.

What about catching /dev/console instead of VT console,  SERIAL_CORE
console, ...?
Then it works with whatever console= parameter you specify.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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