On May 15, 2010, at 9:44 AM, Ken Thomases wrote:

> Probably easier and more productive to use Instruments and the File Activity 
> instrument.

Hmm.  Looking at that instrument in detail, it's not clear that it catches all 
file descriptors.  In particular, it seems to only track the open() system call 
(and its variants).  It doesn't seem to track the socket() or pipe() calls, etc.

You can modify it to do so.  Double-click the instrument in the session window 
to see its details.  This takes a bit more know-how, though, so it's not quite 
as nice.

If you don't want to go that route, then fs_usage may be another alternative 
that's probably still more helpful than lsof.

Cheers,
Ken

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