FWIW this technique is described in "Unix Network Programming" by W. Richard Stevens (http://www.kohala.com/start/unp.html http://www.kohala.com/start/unp.html)

FWIW this technique is described in "Unix Network Programming" by W. Richard Stevens (http://www.kohala.com/start/unp.html http://www.kohala.com/start/unp.html) in section 6.1: "Passing File Descriptors"