On 27 Jun 2017, at 22:45, Rick Mann <rm...@latencyzero.com> wrote:
> 
> Agreed. Thanks for the code, and for showing the other techniques. In my 
> case, I still have to support HFS+, and I want to do that with hard links. I 
> wish there was an API to clone-or-hardlink, but I can do that.

Perhaps worth emphasising here, since you mention hard links, that the 
difference between hard links and clones is that clones are copy-on-write.  
i.e. if you hard link a file, and then change the data, *all of the linked 
copies will change too*.

I’m sure that’s not an issue in your application, but if someone later happens 
across this thread and thinks “What a great idea!”, mentioning that the two are 
only equivalent for the read-only case might avoid some pain.

Kind regards,

Alastair.

--
http://alastairs-place.net

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