> Pipes and sockets on a local system are usually implemented using shared memory. ... where the sharing is mediated by the kernel. You can't access the pipe/s

> Pipes and sockets on a local system are usually implemented using shared memory. ... where the sharing is mediated by the kernel. You can't access the pipe/socket buffers directly from a user-space program. EDIT: IIRC, POSIX message queues, at least on Solaris, are implemented SHM and clever queue bookkeeping. But MQs are not sockets or pipes.