Al Viro wrote:
quoted text
> On Fri, Oct 19, 2007 at 06:07:45AM +0930, David Newall wrote:
>   
>>> considerations of this whole scheme. Linux, like most Unix systems, 
>>> has never allowed hard links to directories for a number of reasons;
>>>       
>> The claim is wrong.  UNIX systems have traditionally allowed the 
>> superuser to create hard links to directories.  See link(2) for 2.10BSD 
>> <http://www.freebsd.org/cgi/man.cgi?query=link&sektion=2&manpath=2.10+BSD>. 
>> Having got that wrong throws doubt on the argument; perhaps a path can 
>> simultaneously be a file and a directory.
>>     
>
> Learn to read.  Linux has never allowed that.  Most of the Unix systems
> do not allow that.

I did read the claim and it is ambiguous, in that it can reasonably be 
read to mean that most UNIX systems never allowed such links, which is 
wrong.  All UNIX systems allowed it until relatively recently.
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