Re: [PATCH] open: introduce O_NOSTD

From: Ulrich Drepper
Date: Thu Aug 27 2009 - 10:22:52 EST

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.

â Ulrich Drepper â Red Hat, Inc. â 444 Castro St â Mountain View, CA â
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