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Re: fopen + mmap

From: Andreas Schwab <schwab at suse dot de>
To: Roland McGrath <roland at frob dot com>
Cc: GNU libc hacker <libc-hacker at sources dot redhat dot com>
Date: Sat, 19 Jan 2002 23:39:14 +0100
Subject: Re: fopen + mmap
References: <20020119222944.A23741B9F3@perdition.linnaean.org>

Roland McGrath <roland@frob.com> writes:

|> > The whole section is about shared file descriptions, the actions to be
|> > taken before a file descriptions may be accessed through a second handle.
|> > It does not define the semantics of a non-shared stream.
|> 
|> We are talking about a shared file description.  The fileno call makes it
|> shared between the stream returned by fopen and the fd returned by fileno.

Yes, but the section still doesn't say anything about fflush.  Since
calling that with an input stream is an undefined operation (there is no
wording in POSIX to make it defined), you cannot use it as an action to
comply to paragraph (g).

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg
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"And now for something completely different."

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

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