linux-kernel - Re: [PATCH] alternative to sys

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Message-ID: <4810AF9F.5040705@redhat.com>
Date:	Thu, 24 Apr 2008 09:04:47 -0700
From:	Ulrich Drepper <drepper@...hat.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	akpm@...ux-foundation.org, torvalds@...ux-foundation.org
Subject: Re: [PATCH] alternative to sys_indirect, part 1

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Alan Cox wrote:
> Believe it or not we have the compute capability between us to not
> accidentally reassign values we assigned to one thing to something else.

Once again, this is not about assigned values.  This is about the time
before you get a value assigned.  Not every experiment out there will
have a value assigned before it starts development.

But it really doesn't matter to me. I'm not the one you would introduce
the problem.  Patch is forthcoming.

>> Oh really?  You open a server socket, use fcntl(FD_CLOEXEC), and then
>> accept(). 
> 
> And your behaviour just became OS specific....

Not according to POSIX.  If some OSes deliberately violate POSIX that's
their problem.  All POSIX OSes will have up to today return a new file
descriptor without the close-on-exec flag set at all times.  Just read
the spec.

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