On Mar 21, 2010, at 6:01 PM, gMail.com wrote:

> Also, the man says that getattrlist and setattrlist don't work on all the
> volumes. So, how can I know whether I can call these APIs?

The man page for getattrlist says:

> The best way to test whether a volume supports this function is to simply 
> call it and check the error result.  getattrlist() will return ENOTSUP if it 
> is not supported on a particular volume.

The man page for setattrlist says:

> Not all volumes support setattrlist().  However, if a volume supports 
> getattrlist(2), it must also support setattrlist().  See the documentation 
> for getattrlist(2) for details on how to tell whether a volume supports it.

It also says:

> The functions are only supported by certain volume format implementations.  
> For maximum compatibility, client programs should use high-level APIs (such 
> as the Carbon File Manager) to access file system attributes. These 
> high-level APIs include logic to emulate file system attributes on volumes 
> that don't support setattrlist() and fsetattrlist().

Cheers,
Ken

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