Shared memory

[Ken Brown]

Hi Corinna,

I think I see how to enable FIFOs to be opened for reading multiple times, by 
using shared memory to maintain data needed by all readers.

To this end I'm trying to imitate some of what you did in 
fhandler_socket_unix.cc, and I find I'm confused about the use of reopen_shmem. 
When this is called by fhandler_socket_unix::dup, shouldn't the call actually be

   fhs->reopen_shmem () ?

It's the new fhandler that needs to open the shared memory, isn't it?  Or am I 
misunderstanding something?

Thanks.

Ken