Re: lib/49185: strvisx: Handle zero-length input strings gracefully.

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

The following reply was made to PR lib/49185; it has been noted by GNATS.

From: Joerg Sonnenberger <joerg%britannica.bec.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: lib/49185: strvisx: Handle zero-length input strings gracefully.
Date: Mon, 8 Sep 2014 18:49:09 +0200

 On Mon, Sep 08, 2014 at 04:20:00PM +0000, conrad.meyer%isilon.com@localhost 
wrote:
 > The internal istrsenvisx() routine overloaded the zero length value as a
 > sentinel for "use strlen(3)." This is bad because the zero-length source 
 > string
 > has a defined behavior and the pointer for a zero-length string may be
 > completely bogus.
 
 At least the second half is wrong. A zero-length string still has to
 match the valid object rules. That said, I don't see why this behavior
 isn't provided under a flag.
 
 Joerg