New rename(2) function

[Igor Peshansky]

On Wed, 1 Aug 2007, Eric Blake wrote:

> Also, where do you check that rename("a","a") is a successful no-op, as
> well as rename("a","b") when a and b are hard links to the same inode
> (perhaps both of these cases are covered by NtSetInformationFile?)

Huh?  The first one I understand, but why is rename("a","b") a no-op?
Shouldn't it cause "a" to be removed?
	Igor
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