>> Link with the target being a directory and the source a any file or
>> only directories?  And only as superuer?
>
>I'm sorry, I ment unlink(2) here.

Ah, so symmetrical with link(2) to directories.

unlink(2) doesn't always work and rmdir(2) will not remove empty directories
with a link count other than 2 (for "." and "..")

You can't unlink "." or ".."; though in early days it was what was used
to create directories.  (mknod dir , link(dir, dir/.) , link(., dir/..))

I think removing the ability to use link(2) or unlink(2) on directories
would hurt no-one and would make a few things easier.

Casper
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