From owner-cvs-all  Sun Jan 26  4:19:49 2003
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Date: Sun, 26 Jan 2003 04:19:47 -0800
From: Juli Mallett <jmallett@FreeBSD.org>
To: Hiten Pandya <hiten@unixdaemons.com>
Cc: "Tim J. Robbins" <tjr@FreeBSD.ORG>, cvs-committers@FreeBSD.ORG,
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Subject: Re: cvs commit: src/lib/libc/stdio fopen.3 freopen.c
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References: <200301261001.h0QA1xpo065748@repoman.freebsd.org> <20030126121550.GA58214@unixdaemons.com>
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* De: Hiten Pandya <hiten@unixdaemons.com> [ Data: 2003-01-26 ]
	[ Subjecte: Re: cvs commit: src/lib/libc/stdio fopen.3 freopen.c ]
> On Sun, Jan 26, 2003 at 02:01:59AM -0800, Tim J. Robbins wrote the words in effect of:
> > tjr         2003/01/26 02:01:59 PST
> > 
> >   Modified files:
> >     lib/libc/stdio       fopen.3 freopen.c 
> >   Log:
> >   Initial implementation of the C99 feature whereby calling freopen() with
> >   a NULL filename argument allows a stream's mode to be changed. At the
> >   moment it just recycles the old file descriptor instead of storing the
> >   filename somewhere and using that to reopen the file, as the standard
> >   seems to require. Strictly conforming C99 applications probably can't
> >   tell the difference but POSIX ones can.
> >   
> >   PR:             46791
> 
> Is this like fmemopen()/open_memstream()?

No, it's like changing the mode a FILE stream is opened as.  So you can use
freopen to go from being say "rb" to "w+", etc.  The problems tjr points out
relate to just using the fd, as opposed to doing what seems desired: actually
reopen the stream in question, as opposed to just updating it.

Or so I understand it.

Thanx,
juli.
-- 
Juli Mallett <jmallett@FreeBSD.org>
AIM: BSDFlata -- IRC: juli on EFnet.
OpenDarwin, Mono, FreeBSD Developer.
ircd-hybrid Developer, EFnet addict.
FreeBSD on MIPS-Anything on FreeBSD.

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