Path: utzoo!attcan!uunet!jetson!john
From: john@jetson.UPMA.MD.US (John Owens)
Newsgroups: comp.unix.xenix
Subject: Re: Test SCO Xenix IPC reliability
Message-ID: <128@jetson.UPMA.MD.US>
Date: 25 Aug 88 20:24:37 GMT
References: <22012@neabbs.UUCP> <5786@rpp386.UUCP>
Organization: SMART HOUSE Limited Partnership
Lines: 21

In article <5786@rpp386.UUCP>, jfh@rpp386.UUCP (The Beach Bum) writes:
> this program should work regardless of scheduling.

> if ... TOCK
> is printed then signal() has been called.

Not the first time.  If ... TOCK is printed once (after TICK ... is
printed), then parent() set loc[0] and child()'s while loop ended.
Yes, parent and child both have called signal(), but the signal
apparently doesn't go through.

I think that parent() executes
	kill (loc[2], SIGUSR1);
before the child process executes
	loc[2] = getpid();
and the child process never receives a signal.

-- 
John Owens		john@jetson.UPMA.MD.US
SMART HOUSE L.P.	uunet!jetson!john		(old uucp)
+1 301 249 6000		john%jetson.uucp@uunet.uu.net	(old internet)