/*
 * Stack-smashing vulnerable program based on one in
 * Smashing the Stack for Fun and Profit by Aleph One
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

static unsigned int
getesp(void)
{
	__asm__("movl     %esp,%eax");
}

static int
copy(const char *input)
{
	char vbuf[1024];

	(void) strcpy(vbuf, input);

	(void) fprintf(stdout, "Vulnerable buffer at %p\n", (void *)&vbuf);

	return (0);
}

int
main(int argc, const char *argv[])
{

	(void) fprintf(stdout, "Vulnerable stack top at %p\n",
	    (void *)getesp());

	if (argc != 2) {
		(void) fprintf(stderr, "Usage: %s string\n", argv[0]);
		exit(EXIT_FAILURE);
	}

	(void) copy(argv[1]);

	return (0);
}