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Date: Thu, 23 Aug 2012 19:32:31 +0300
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From: Yaroslav <yarikos@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] APE rename: wstat for 'none'
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> no, i didn't.  ratrace doesn't run if you're none.

try 'ratrace -c auth/none cmd ...' while not being none
and ignore everything preceding Exec "cmd".

> as i understand it, your claim is that mv works as none but ape/rename
> does not and this is because ape/rename uses wstat.

both use wstat or copying; what's different is how they choose what to use.
mv falls back to copying if wstat fails; ape/rename does not.