Making rsync compile under Mac OS X 10.3.9 with extended attributes

Vitorio Machado v.machado at
Sun Feb 10 22:55:20 GMT 2008

Here is the last version of my integration of Resource Forks and  
Finder Info capabilities to OS X prior to Tiger: http://

- Coded the setter function
- Made changes to getter to emulate the expected behaviour when  
sending NULL buffer and 0 size, to return the size of the arguments

What I've noticed: there is no clean way to code sys_fgetxattr as it  
works with a file descriptor and the getattrlist only works with a  
path. There is no fonction like "fgetattrlist" and the "easiest" way  
to get a file path from it's file descriptor is to scan the  
filesystem looking for an inode number... What a performance issue!

The good news: As I've seen in the code, sys_fgetxattr is only used  
by get_stat_xattr when called by x_fstat all from xattrs.c. But no  
code seems to call x_fstat, so it seems that this function is  
useless, at least by now. Someone can confirm this?

- Put the good includes in the header file (easy)
- Make a configure test to identify pre-tiger Macs (can somebody help  
me with this, I don't really know how to do it)
- Test and debug it :)
- Integrate this modification to the main code

Good night, folks!


Le 7 févr. 08 à 23:33, Wayne Davison a écrit :

> On Thu, Feb 07, 2008 at 10:51:34PM +0100, Vitorio Machado wrote:
>> I also noticed that sys_lgetxattr can not be called twice if the  
>> buffer
>> size is too small, because there is no offset management. Is this  
>> normal?
> The code calls sys_lgetxattr() once with a NULL pointer and a 0 length
> to ask for the size.  Then, it calls it with a buffer large enough to
> hold the attribute.  So, the best solution would be to make your code
> just ask the OS how big an item is when there is no buffer  
> pointer.  If
> that is not possible, it should be easy to cache an object in a static
> in your function and re-use it for a following call where the name
> matches.
> ..wayne..

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