> Another limitation of unix domain sockets is that the size of the path string must be less than PATH_MAX. I've run into this when the only directory I had wri

> Another limitation of unix domain sockets is that the size of the path string must be less than PATH_MAX. I've run into this when the only directory I had write access to was already close to the limit. Local TCP sockets obviously do not have this limitation. This drove me nuts for a long time, trying to hunt down why the socket couldn't be created. it's a really subtle limitation, and there's not a good error message or anything. In my use case, it was for testing the server creating the socket, and each test would create it's own temp dir to house the socket file and various other resources. > In general, I choose a shared memory queue for local-only inter-process communication. Do you mean the sysv message queues, or some user space system? I've never actually seen sysv queues in the wild, so I'm curious to hear more.