From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ftp.linux.org.uk>
Subject: Re: *at syscalls for xattrs?
Date: Mon, 16 Jul 2007 09:04:02 +0100
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Cc: Nicholas Miell <nmiell@comcast.net>, linux-fsdevel@vger.kernel.org,
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To: Jan Engelhardt <jengelh@computergmbh.de>
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On Mon, Jul 16, 2007 at 09:56:10AM +0200, Jan Engelhardt wrote:
> >Just one question: what the bleeding hell for?  Not that the rest of
> >..at() family made any damn sense as an interface...
> 
> fd1 = open("dir1", O_DIRECTORY):
> fd2 = open("dir2", O_DIRECTORY);
> system("mount -t tmpfs none dir1");
> system("mount -t tmpfs none dir2");
> openat(fd1, "file1", O_RDWR | O_CREAT);
> openat(fd2, "file2", O_RDWR | O_CREAT);
> 
> If you have a better way to accomplish this, let me know. :)

To accomplish what, exactly?  Access to overmounted directory?
So bind it elsewhere and use that.  I still don't see the point -
neither of the interface nor of your example...