Re: [RFC PATCH] fs: allow open(dir, O_TMPFILE|..., 0) with mode 0

[Andy Lutomirski]

On Nov 3, 2014 12:34 AM, "Christoph Hellwig" <hch@xxxxxxxxxxxxx> wrote:
>
> On Fri, Oct 31, 2014 at 11:53:09AM -0700, Linus Torvalds wrote:
> > On Fri, Oct 31, 2014 at 11:44 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
> > >
> > > Does the patch in this thread not fix that?
> >
> > It should. Modulo the glibc problem that makes it hard to actually set
> > the mode properly.
>
> That doesn't help because we explicitly reject O_RDONLY when combined
> with O_TMPFILE.

I think I'm missing something.  How is an O_RDONLY temporary file
useful?  Wouldn't you want an O_RDWR tempfile with mode 0400 or
something like that?

--Andy
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