X-Authentication-Warning:	delorie.com: mail set sender to djgpp-workers-bounces using -f
X-Recipient:	djgpp-workers AT delorie DOT com
Date:	Sat, 20 Jul 2013 14:34:45 +0300
From:	Eli Zaretskii <eliz AT gnu DOT org>
Subject:	Re: Set _IOERR if the file stream has been opened in wrong mode.
In-reply-to:	<87a9lhqz60.fsf@uwakimon.sk.tsukuba.ac.jp>
X-012-Sender:	halo1 AT inter DOT net DOT il
To:	djgpp-workers AT delorie DOT com
Message-id:	<83wqolxy5m.fsf@gnu.org>
References:	<51E5D0C6 DOT 1060404 AT gmx DOT de> <83y5951a79 DOT fsf AT gnu DOT org> <51E702E0 DOT 3010809 AT gmx DOT de> <83fvvc1t0x DOT fsf AT gnu DOT org> <8738rcsdik DOT fsf AT uwakimon DOT sk DOT tsukuba DOT ac DOT jp> <201307180459 DOT r6I4xWxV010383 AT envy DOT delorie DOT com> <51E9D758 DOT 8000209 AT gmx DOT de> <CAA-ihx_SR7sb9+Tq_Ok+VM9FbjPLp9Lvk8a+bXf94oj13MTeWg AT mail DOT gmail DOT com> <87fvv9r6ba DOT fsf AT uwakimon DOT sk DOT tsukuba DOT ac DOT jp> <8361w5zl86 DOT fsf AT gnu DOT org> <87a9lhqz60 DOT fsf AT uwakimon DOT sk DOT tsukuba DOT ac DOT jp>
Reply-To:	djgpp-workers AT delorie DOT com
Errors-To:	nobody AT delorie DOT com
X-Mailing-List:	djgpp-workers AT delorie DOT com
X-Unsubscribes-To:	listserv AT delorie DOT com

> From: "Stephen J. Turnbull" <turnbull AT sk DOT tsukuba DOT ac DOT jp>
> Date: Sat, 20 Jul 2013 19:54:47 +0900
> 
> Eli Zaretskii writes:
>  > > From: "Stephen J. Turnbull" <turnbull AT sk DOT tsukuba DOT ac DOT jp>
>  > > Date: Sat, 20 Jul 2013 17:20:25 +0900
>  > > 
>  > > I would assume that
>  > > 
>  > >     ifp = fopen(infile, "r"); ofp = fopen(outfile, "w");
>  > > 
>  > > produces an unwritable and an unreadable file respectively
>  > 
>  > There's no such thing as "unreadable file" on DOS.
> 
> Sorry, I didn't mean "file" (too much Python programming, obviously),
> I meant "FILE*".  Can you read from ofp on DOS?

That last question is no longer in DOS-land, it is in the libc-land.
Because DOS knows nothing of 'FILE *'.

So we are back at square one: is there any good reason, apart of
"other libraries do that", which mandates that a FILE stream open with
"w" be unreadable?

- Raw text -