[Info-vax] Request description of UFS for VMS person

glen herrmannsfeldt gah at ugcs.caltech.edu
Fri Apr 24 16:04:41 EDT 2009


AEF <spamsink2001 at yahoo.com> wrote:

>> I didn't look at the source, but I assume it is the utility. ?Another case
>> of protecting people from themselves a tthe expense of the people who really
>> need the capability.
(snip)
 
> Well, couldn't they have made it work only for the super user, or
> root, or whatever it's called? (Synonymous?)

Reminds me of the problem with hard links to directories.

While files can have multiple links, directories are supposed
to have only one.  Some unix allow the superuser to create
hard links to directories, and I did it once (a long time ago).
It turns out that was on NFS, which immediately crashed the 
NFS file server.  As usual for NFS, the client waits for the
server to return, and immediatly retries the operation that
failed before the crash.  

That was before I knew about symbolic links, which are a 
much better solution to the problem.

I am not sure if any unix systems will allow the superuser
to unlink a directory that isn't empty.

-- glen 



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