Messages in this thread | | | Date | Mon, 28 Sep 2009 16:53:53 +0100 | From | Jamie Lokier <> | Subject | Re: [PATCH] vfs: new O_NODE open flag |
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Andreas Dilger wrote: > > It's not possible even without this flag. Consider: > > > > fd1 = open("/tmp/foo",flags); > > rc = rename("/tmp/foo","/tmp/bar"); > > fd2 = open("/tmp/foo",flags); > > > > Or were you asking if *absent that sort of tomfoolery* if it would work? > > No, the point is that we HAVE an fd that points to the original "/tmp/foo" > opened with O_NODE, and now (after an ioctl, stat, etc) we decide it is > safe to open the file read and/or write without releasing the existing > fd. The whole point is to AVOID this kind of tomfoolery.
Make sense, and openat() seems like a good way to accomplish it.
-- Jamie
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