You can actually implement a basic pubsub (both one-to-many and many-to-many) mechanism using FIFOs and file system permissions in a particular fashion known as

You can actually implement a basic pubsub (both one-to-many and many-to-many) mechanism using FIFOs and file system permissions in a particular fashion known as a fifodir: http://skarnet.org/software/s6/fifodir.html http://skarnet.org/software/s6/fifodir.html http://skarnet.org/software/s6/ftrig.html http://skarnet.org/software/s6/ftrig.html