Date: Wed, 9 Sep 1998 14:54:22 +0200 (CEST) From: Andrzej Bialecki <abial@nask.pl> To: Poul-Henning Kamp <phk@critter.freebsd.dk> Cc: freebsd-current@FreeBSD.ORG Subject: Re: Adding sysctl, part II Message-ID: <Pine.BSF.4.02A.9809091411140.21222-100000@korin.warman.org.pl> In-Reply-To: <1006.905339048@critter.freebsd.dk>
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On Wed, 9 Sep 1998, Poul-Henning Kamp wrote:
>
> >Well, I kind of figured out I probably need to use SYSCTL_PROC, and
> >applied the following patch to machdep.c:
>
> Look at the
> DDB_SHOW_COMMAND(msgbuf, db_show_msgbuf)
> {
>
> at the bottom of kern/subr_prf.c
Ah! I see it now - I should be glad it didn't explode in my face...
It's still unclear to me, however, what should I do to retrieve not only
the struct msgbuf (which the msgbufp points to), but the buffer itself as
well. If I understand this correctly, once I retrieved the struct msgbuf
contents, the msgbufp->msg_ptr is useless because it points to the data in
kernel space, so I need to make another call to retrieve the buffer
contents, right? The code in subr_prf.c can do this because it works in
kernel space all the time, but I can't...
Andrzej Bialecki
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