Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!pt.cs.cmu.edu!rochester!ken
From: ken@cs.rochester.edu (Ken Yap)
Newsgroups: alt.folklore.computers
Subject: Re: Lights on Burroughs machines (shutdown messages)
Message-ID: <1990Jan20.033608.28979@cs.rochester.edu>
Date: 20 Jan 90 03:36:08 GMT
References: <1990Jan15.173434.5792@virtech.uucp> <729@ncs.dnd.ca> <9082@ttidca.TTI.COM> <25b77c7a.2b35@polyslo.CalPoly.EDU>
Reply-To: ken@cs.rochester.edu
Organization: University of Rochester Computer Science Department
Lines: 40
Address: Rochester, NY 14627, (716) 275-1448

|~IBM 370's and their descendants do the same thing (though they display
|~DEAD).
|
|	Can't remember what machine it was, but if it crashed...
|	the console would print:
|
|		P
|		   L
|		      O
|			 P.......
|	
|	And then give the kernal debug prompt.

I had fun with this program when I was learning about signals and in
particular signal 15 a.k.a. SIGTERM.

catch()
{
	int	fd;
	fd = open("/dev/tty8", 2);
	write(fd, "Arrggh, you dirty rat!\n\n\n\n", 26);
}

main()
{
	signal(15, catch);
	sleep(100000);
}

(Please, no nitpicks about small errors and bad style, I'm just trying
to give the idea. Besides, I was a bad programmer then. :-))

The next time the system manager did a graceful shutdown of the 11/40,
it printed on the console

	Arrggh, you dirty rat!

much to his chagrin.

PS: And yes, the console was /dev/tty8 in those days. Ask an old-timer.