On 06/09/2013 11:42 AM, Matthew Garrett wrote: > On Sun, Jun 09, 2013 at 11:05:44AM -0400, Doug Ledford wrote: > >> And really, we've spent more time on this thread than it would take >> Lennart to fix PA. Just a quick stat and check of uid before trying to >> remove the stale files and this would all go away. Sure, your stat and >> remove could race, but this is nothing more than a garbage collection >> process anyway, so who cares? We'll just get it next time. > > "Stat and then open" is inherently open to race conditions.
Of course it is. > In this > specific case it probably doesn't realistically matter, Exactly my point. > but it's not > behaviour that should be encouraged. I would never encourage it in terms of suggesting people try to second guess the kernel's rules and limitations. However, you can use such a technique to weed out otherwise known to fail cases, at least in instances like this where it is a garbage collection operation and failure to guess properly is obviously far from critical. > The only way to know for certain > whether you're going to be able to open or unlink a file is to attempt > to open or unlink that file, and we shouldn't encourage people to think > otherwise. Agreed. -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
