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From: "Stephen J. Turnbull" <turnbull AT sk DOT tsukuba DOT ac DOT jp>
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Subject: Re: Set _IOERR if the file stream has been opened in wrong mode.
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Date: Sat, 20 Jul 2013 19:54:47 +0900
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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?