It does not function on HP-UX with a trusted system
configuration.
-On Compaq Tru64 Unix, only the pre-authentication part of privsep is
-supported. Post-authentication privsep is disabled automatically (so
-you won't see the additional process mentioned below).
+On Cygwin, Tru64 Unix, OpenServer, and Unicos only the pre-authentication
+part of privsep is supported. Post-authentication privsep is disabled
+automatically (so you won't see the additional process mentioned below).
Note that for a normal interactive login with a shell, enabling privsep
will require 1 additional process per login session.