From: utzoo!decvax!cca!mogul.Shasta@Su-Score@sri-unix
Newsgroups: net.unix-wizards
Title: Re:  True login names
Article-I.D.: sri-unix.3314
Posted: Fri Sep 17 00:52:03 1982
Received: Fri Sep 17 06:28:07 1982

From: Jeff Mogul 
Date: Monday, 13 Sep 1982 21:25-PDT
Alas, getppid() can be easily fooled, because when the parent
dies, the child process is inherited by init.  Thus, any one
of a number of dodges can be dreamt up, wherein the parent
of your modified login program is dead before getppid() is called.
-Jeff