Streams message M_COPYIN

[Bill Mulert]

Can someone help me understand the M_COPYIN, M_COPYOUT, and M_IOCDATA
Streams message types?

I see their structures defined in <sys/stream.h>, but there is no
mention of these message types in the Streams Programming Guide, and
it's not really clear to me how they are to be used.

Can someone provide a short description of how one may use these guys
to copy a datablob between user space, and a streams driver?

Please email response.
-- 
Bill Mulert   wdm at icc.com
Intercomputer Communications Corp.
Cincinnati, Ohio  45236
513-745-0500