Date: Wed, 28 Feb 2001 13:28:17 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Martin Stromberg <eplmst AT epl DOT ericsson DOT se>
cc: djgpp-workers AT delorie DOT com
Subject: Re: FD 4 special for DJGPP (and Perl in particular)?
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On Wed, 28 Feb 101, Martin Stromberg wrote:

> > However, the
> >   exec 4>&1
> > causes the following error:
> > redirection error: Bad file descriptor (EBADF)
> > 
> > Only fd 4 seems to be affected.
> 
> Doesn't *DOZE have five predefined fds: stdin, stdout, stderr, AUX and
> PRN (not sure about the order of the last two).

It does; but so what?  A redirection such as above calls dup2(1, 4).
dup2 should close the previous handle 4, if it was open, before it 
redirects it to handle 1.

Anyway, if your theory is correct, the same proble, should happen with 
handle 3.  Does it?