Richard Elling <richard.ell...@gmail.com> wrote:
> IIRC, POSIX does not permit hard links to directories. Moving or renaming
> the directory structure gets disconnected from the original because these
> are relative relationships. Clearly, NetApp achieves this in some manner
> which is not constrained by POSIX -- a manner which appears to be beyond
> your ability to describe.
I have recently frequently seen the name "POSIX" and I am not sure whether the
people who used the name know what they are talking about. POSIX e.g. of course
permits harlinks to directories.
If you like a fact based discussion, I in general would like to a verification
of the related claim as this allows to prove or disprove a claim.
There e.g. never has been an explanation on why a special directory like .zfs
or whatever should not be allowed by POSIX.
Let me make an example.....
In Sommer 2001, a person from Microsoft asked the Microsoft notation of named
streams (filename:streamname) to be introduced into POSIX. It was easy to
explain him that this would not be POSIX compliant as it would introduce
another forbidden character (':') for filenames. Currently only '/' and '\0'
are discallowed in filenames.
He later asked to introduce a special directory "..." that could hold the named
streams for files. This is also non POSIX compliant as it would require to
modify all implementationd for find(1), ls(1), tar(1) and similar to know about
the secific meaning of "...".
As a result, Sun did introduce the "attibute directory", runat(1), openat(2)
and similar around August 2001 in order to preove that there is a POSIX
compliant way to implement named streams in files.
If we could have a discussion at a similar level, I would be happy to help with
the discussion.
Jörg
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joerg.schill...@fokus.fraunhofer.de (work) Blog:
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