Getting PID of a unix domain socket client

[muralijesudoss]

Hi all,
I am writing a simple client server program using Unix domain sockets.
Client sends some 10 bytes to the server and the server responses with another 10 bytes.

Is there any way I can get the PID of the client which sends the request to the server?!?

In linux, I am able to do this by using getsockopt(). But in MAC OS X, I am able to get only GID and UID of the client. I am running Darwin Kernal 8.6.0.

Any help regarding this is highly appreciated...

Thanks,
Murali J.