/*
 * imaVax -- pretend to be a vax and access the null pointer,
 *	to test the "thud" algorithm.
 *
 * Copyright (C) 2004  David Collier-Brown
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of your choice of the GNU Lesser (Library) General 
 *   Public License or the Sun Common Development and Distribution License .
 */

#include <stdio.h>

 int
main(int argc, char *argv[]) {
	char	*p = NULL,
		c = '?';
	char 	*ProgName = argv[0];

	if (argc != 1) {
		printf("imaVax -- dereference 0 and drop core.\n");
		(void) 	exit(1);
	}

	(void) sleep(5);
	(void) fprintf(stderr, "%s: starting imaVax.\n", ProgName);
	(void) fprintf(stderr, "%s: dereferencing 0.\n", ProgName);
	(void) fflush(stderr);
	c = *p;
	(void) fprintf(stderr, "%s: survived dereferencing 0, "
		"c =  %#x (\"%c\")\n", ProgName, c, c == 0? ' ': c);
	(void) fprintf(stderr, "%s: assigning to *0\n", ProgName);
        (void) fflush(stderr);

	*p = 'x';
	(void) fprintf(stderr, "%s: survived assigning to *0, "
		"c =  %#x (\"%c\")\n", ProgName, c, c == 0? ' ': c);
        (void) fflush(stderr);
	return 0;
}