[Box Backup] OS X xattr backups

[Eric Cronin]

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On Jun 19, 2008, at 12:30 PM, Chris Wilson wrote:

>
> Yes, that's right. I'm glad it works for you. I'm still not sure  
> that 10k
> is a reasonable buffer size though, or exactly what to do if it's  
> not big
> enough. The API for (l)listxattr sucks. :-(


Does the buffer size need to be static?  The OS X implementation at  
least has the ability to return the size needed:

      If namebuf is set to NULL, the function returns the size of the  
list of
      extended attribute names.  This facility can be used to  
determine the
      size of a buffer sufficiently large to hold the names of the  
attributes
      currently associated with path.

Since you dynamically allocate the string already, setting  
listBufferSize with a pre-call to listxattr() seems simple enough.

Thanks,
Eric

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