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From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-11-27 16:04:53

At 01:42 AM 11/27/2004, Keith Burton wrote:

>Does using last_write_time leave an opportunity for false negative
>because it has been updated in between obtaining the value for each

Holding open the first fir handle until the second has also been processed
protects against race conditions caused by defragging. But not against a
file size or last write time change.

I'm not sure there is anything that can be done about that. Race conditions
can often poison filesystem operations; that's just a fact-of-life with
most operating systems.

> Would using creation_time ( if available ) be safer ?

My feeling was that if a filesystem only supported a single date (as some
legacy systems did), then it was likely to be last_write_time.

While there are theoretical holes in the current logic, I'm hoping that it
provides a practical implementation useful in real-world applications. If
users run into practical problems, I hope they will report them here right


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