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Re: fopen + mmap

From: Ulrich Drepper <drepper at redhat dot com>
To: Roland McGrath <roland at frob dot com>
Cc: GNU libc hacker <libc-hacker at sources dot redhat dot com>
Date: 19 Jan 2002 14:11:01 -0800
Subject: Re: fopen + mmap
References: <20020119212257.0A0E81B9F3@perdition.linnaean.org>
Reply-to: drepper at redhat dot com (Ulrich Drepper)

Roland McGrath <roland@frob.com> writes:

> I don't have ANSI C on hand, but my recollection is pretty clear that
> fflush is specifically defined for input streams (to discard buffered
> input).

C89 never said this and neither does C99.  I have both standards here.

> POSIX.1-1996 section 8.2.3 (p 213 in the ISO printing) specifically
> mentions using fflush on input streams to synchronize the file
> position.

This text is still present but it is clearly an error.  Unix/POSIX
directly refer to ISO C for the definition of fflush() and therefore
the function isn't defined for input streams.  You participated in
writing a standard, you know how these things can slip in.  The
OpenGroup is soon starting to collect defect reports for TR1 of XPG6.
This is something which should be reported and fixed.

-- 
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Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
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Follow-Ups:
- Re: fopen + mmap
  - From: Roland McGrath

References:
- Re: fopen + mmap
  - From: Roland McGrath

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