kern/163076: It is not possible to read in chunks from linprocfs and procfs.

[Dag-Erling Smørgrav]

The following reply was made to PR kern/163076; it has been noted by GNATS.

From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des at des.no>
To: Jaakko Heinonen <jh at FreeBSD.org>
Cc: Poul-Henning Kamp <phk at phk.freebsd.dk>,  Petr Salinger <Petr.Salinger at seznam.cz>,  bug-followup at FreeBSD.org,  mdf at FreeBSD.org
Subject: Re: kern/163076: It is not possible to read in chunks from linprocfs and procfs.
Date: Fri, 09 Dec 2011 13:17:59 +0100

 Jaakko Heinonen <jh at FreeBSD.org> writes:
 > After looking at some code using sbufs I think that the sbuf(9) API
 > change done in r222004 is problematic.
 
 I agree, but it's far from the first poorly thought-out change in the
 sbuf API.  The biggest mistake was to allow userland to use the same API
 and code rather than its own implementation of a subset of the API.
 
 > Could we just remove the error check from sbuf_len()? (patch below) I
 > have Cc'd more people.
 
 Why?
 
 > sbuf(9) manual page wrongly claims that sbuf_data() will return NULL if
 > the buffer has overflowed.
 
 This used to be the case.  I don't know why I removed the check.
 
 DES
 --=20
 Dag-Erling Sm=C3=B8rgrav - des at des.no