Shared Memory in BSD4.3 is lacking?

[John T Riedl]

Another feature of the choice to make semaphores/FIFOs/shared memory
segments different from file descriptors is that select(3) presumably
won't work with them.  How does one check the condition "is data ready
on my queue or on my UDP port?"

Thanks,
-- 
John Riedl
{ucbvax,decvax,hplabs}!purdue!riedl  -or-  riedl at mordred.cs.purdue.edu