From: Morten Welinder <mwelinder@gmail.com>
Date: Thu, 28 Jul 2005 23:29:57 GMT
Subject: Re: [PATCH] mmap error handling
Message-ID: <118833cc05072816294f80a829@mail.gmail.com>
In-Reply-To: <1122586842.17837.9.camel@dv>

> I have verified that successful close() after failed mmap() won't reset
> the output of perror() to "Success".

Does $standard guarantee that?

In general, successful libc calls can set errno to whatever they
please, except zero.  And they sometimes do.  This follows from
C99.

Morten