Thanks for the info, so I'll have to do an if/else and check manually
the size when the buffer is NULL. It's not the case in the actual
code. Any more reactions about what I've coded?
Thanks,
Vitorio Machado
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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