linux-kernel - Re: dup2() vs dup3() inconsistency when

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Message-ID: <48EE6A2B.8030005@redhat.com>
Date:	Thu, 09 Oct 2008 13:31:39 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	mtk.manpages@...il.com, Al Viro <viro@...iv.linux.org.uk>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: dup2() vs dup3() inconsistency when

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H. Peter Anvin wrote:
> The dup2() behavior comes from the logical consequence of dup2()'s
> "close on reuse"; one would think it would be logical for dup3() to
> behave the same way.

No.  We deliberately decided on this change.  Otherwise, what is the
result of dup3(fd, fd, O_CLOEXEC)?  There is no reason to use
dup2(fd,fd), so why the hell somebody wants to defend this is beyond me.

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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