#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define CANARY "in_the_coal_mine"
struct {
	char buffer[1024];
	char canary[sizeof(CANARY)];
}

temp = { "buffer", CANARY };

int main(void) {
	struct hostent resbuf;
	struct hostent *result;
	int herrno;
	int retval;
	/*** strlen (name) = size_needed - sizeof (*host_addr) - sizeof (*h_addr_ptrs) - 1; ***/
	size_t len = sizeof(temp.buffer) - 16*sizeof(unsigned char) - 2*sizeof(char *) - 1;
	char name[sizeof(temp.buffer)];
	memset(name, '0', len);
	name[len] = '\0';
	retval = gethostbyname_r(name, &resbuf, temp.buffer, sizeof(temp.buffer), &result, &herrno);
	if (strcmp(temp.canary, CANARY) != 0) {
		puts("vulnerable");
		exit(EXIT_SUCCESS);
	}
	if (retval == ERANGE) {
		puts("not vulnerable");
		exit(EXIT_SUCCESS); }
		puts("should not happen");
		exit(EXIT_FAILURE);
	}