Path: utzoo!attcan!uunet!ncrlnk!ncr-sd!hp-sdd!hplabs!hpda!hpcupt1!vandys
From: vandys@hpcupt1.HP.COM (Andrew Valencia(Seattle))
Newsgroups: comp.unix.microport
Subject: Re: 286: Why no core dump?
Message-ID: <10770003@hpcupt1.HP.COM>
Date: 10 Oct 88 15:02:18 GMT
References: <456@gould.doc.ic.ac.uk>
Organization: Hewlett Packard, Cupertino
Lines: 32

/ hpcupt1:comp.unix.microport / brwk@doc.ic.ac.uk (Bevis King) /  4:47 am  Oct  5, 1988 /

>I am attempting to get the public domain basic interpreter posted
>to comp.sources.unix working on Microport SV/AT.  The problem I have
>is that the program terminates with an "Illegal allignment" message.

	Sounds like your interpreter is trying to kill itself after finding
an internal inconsistency.  Is the string "Illegal allignment" (sic)
a string in the program?  Check the code which tries to kill itself.
One way to make it happen is to write a fork() which reverses the parent
and child.  Then when the "parent" tries to kill the child, it actually
kills PID 0, which blows away the process group.  If it's using SIGKILL,
even the debugger and shell must die.  I.e.,

	#include <signal.h>
	int pid;

	if( pid = fork() ){
		printf("Child sleeping.\n");
		pause();
	} else {
		printf("Parent, killing child!\n");
		kill( pid, SIGKILL );
	}

	when you actually want:

	if( !(pid = fork()) ){
		...

					Good luck!
					Andy