Re: [PATCH] open: introduce O_NOSTD

Ulrich Drepper
2009-08-27T14:22:45Z

On 08/27/2009 06:54 AM, Eric Blake wrote:
> I hope that my example shows why doing it in the kernel is desirable -
> there is no safe way to keep the pre-O_CLOEXEC efficiency using just the
> library, but there IS a way to do it with kernel support:

You're describing a very special case where the performance implications
are really minimal and try to argue that is a good enough reason? I
don't think so.

If a program really has to do thousands of these safe open calls then it
can invest time into opening /dev/null for any of the unallocated
descriptors < 3. You can even embed this logic in the safer_open function.

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