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NNTP-Posting-Date: Sun, 18 Jun 2017 10:20:42 -0500
From: Gareth Owen <gwowen@gmail.com>
Newsgroups: comp.lang.c
Subject: Re: What is the difference between (r+ and w+)
References: <oi4ih6$5mi$1@gioia.aioe.org> <ln4lvejey6.fsf@kst-u.example.com> <oi4jq0$74j$1@gioia.aioe.org> <oi4l0m$vl6$1@jstuckle.eternal-september.org> <oi4mab$a0f$1@gioia.aioe.org> <oi4p0m$8on$1@dont-email.me> <oi5i38$4an$1@dont-email.me> <oi5qhl$s6k$1@dont-email.me>
Date: Sun, 18 Jun 2017 16:20:42 +0100
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Xref: csiph.com comp.lang.c:112473

Richard Heathfield <rjh@cpax.org.uk> writes:

>> If you look at the prototype of freopen:
>>
>> FILE * freopen(const char *filename,const char *mode,FILE *stream);
>>
>> we see that your claim doesn't hold since that FILE * must have been
>> obtained (eventually) by an fopen.
>
> No. For example, it can be stdin, stdout, or stderr.

In my experience it is rarely used for anything else.