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Date: Thu, 24 Apr 2008 18:45:43 +0200
From: "Michael Kerrisk" <mtk.manpages@gmail.com>
To: "Alan Cox" <alan@lxorguk.ukuu.org.uk>
Subject: Re: [PATCH] alternative to sys_indirect, part 1
Cc: "David Miller" <davem@davemloft.net>, jakub@redhat.com, drepper@redhat.com,
       linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
       akpm@linux-foundation.org, torvalds@linux-foundation.org
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On 4/24/08, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Thu, 24 Apr 2008 09:00:08 -0700 (PDT)
>
> David Miller <davem@davemloft.net> wrote:
>
>
> > From: Alan Cox <alan@lxorguk.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