[Unison-hackers] Unison and extended attributes (xattr) on Tiger?

[Alan Schmitt]

On 23 juin 06, at 16:12, Geoffrey Alan Washburn wrote:

> 	Extended attributes are now used to implement resource forks (as of
> MacOS 10.4), and extended attributes are available on Linux and  
> several
> other Unixes (for ACLs among other things) so it would probably make
> things a bit cleaner to remove the resource fork code and add extended
> attribute support.

About the resource fork part, I'm not 100% sure. I think I read there  
is unified access through the xattr functions, but that the storage  
of resource forks is the same as before.

> 	I'm not aware of any limits on the size of the data an extended
> attribute can hold (other than perhaps size_t).  Looking at the man
> pages, I can't see anything about a limit on the length of an  
> attribute
> name.  It is probably reasonable to assume they are less than 255 UTF8
> characters.

There is a recommendation not to have attributes bigger than 4KB, but  
it is not a hard limit it seems.

Alan

-- 
Alan Schmitt <http://alan.petitepomme.net/>

The hacker: someone who figured things out and made something cool  
happen.
.O.
..O
OOO


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