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

[Jaakko Heinonen]

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

From: Jaakko Heinonen <jh at FreeBSD.org>
To: Dag-Erling =?utf-8?B?U23DuHJncmF2?= <des at des.no>
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, 9 Dec 2011 16:35:30 +0200

 On 2011-12-09, Dag-Erling Smørgrav wrote:
 > Jaakko Heinonen <jh at FreeBSD.org> writes:
 > > As I wrote existing code depends on sbuf_len() to return the actual
 > > length regardless of the error status after sbuf_finish(). I am not
 > > willing to through all code using sbufs to check where it causes
 > > problems. phk@ asserts that r222004 is correct.
 > 
 > What if the sbuf is in a state where asking for its length is
 > meaningless?
 
 Could you give an example about such state? Isn't the length first
 initialized to zero and then increased only when byte(s) has been
 successfully appended to the buffer? sbuf_len() has worked for
 unfinished buffers since r71724.
 
 -- 
 Jaakko