Filesystem oddity

[Gordon Messmer]

Dan Track wrote:
> 
> I'd liek to ask how this is possible, is this something to do with 
> blocks on the filesystem. And how does the command: find /tmp -type d 
> -empty, what parameter does it use to find an empty directory?

I believe that it calls fstat() on the directory after opening it, and 
uses the st_nlink field in the result.  An empty directory will have two 
hard links.