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

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Message-ID: <517f3f820804240945l2dc203afx8fa432ac41219236@mail.gmail.com>
Date:	Thu, 24 Apr 2008 18:45:43 +0200
From:	"Michael Kerrisk" <mtk.manpages@...il.com>
To:	"Alan Cox" <alan@...rguk.ukuu.org.uk>
Cc:	"David Miller" <davem@...emloft.net>, jakub@...hat.com,
	drepper@...hat.com, 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

On 4/24/08, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> On Thu, 24 Apr 2008 09:00:08 -0700 (PDT)
>
> David Miller <davem@...emloft.net> wrote:
>
>
> > From: Alan Cox <alan@...rguk.ukuu.org.uk>
>  > Date: Thu, 24 Apr 2008 16:24:44 +0100
>  >
>  > > BTW in 4.4BSD and derivatives if I remember rightly F_CLOEXEC *is*
>  > > inherited across accept() so I doubt any user space software will be too
>  > > upset by such a shift.
>  >
>  > It actually doesn't.
>  >
>  > Just like in Linux, no file descriptor flags are inherited.
>
>
> NDELAY certainly appears to be looking at Stevens.

A while back I did some testing of this point.  These were the results I noted:

FreeBSD 4.8
O_NONBLOCK and O_ASYNC are inherited
FD_CLOEXEC is not inherited

Solaris 8
O_NONBLOCK and O_ASYNC are inherited
FD_CLOEXEC is not inherited

Tru64 5.1 (sep 03, testdrive)
No F_SETFL flags are inherited
FD_CLOEXEC is not inherited

HP-UX 11
No F_SETFL flags are inherited
FD_CLOEXEC is not inherited
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