/*
 * Report whether this machine's malloc() correctly returns NULL when
 * a memory request cannot be satisfied.  My machine (glibc 2.0.5c)
 * does have this bug.
 */

#include <stdio.h>
#include <malloc.h>
#include <limits.h>

int
main(void)
{
    const char * const p = malloc(ULONG_MAX);  /* Expect NULL. */

    /* If p != NULL, malloc() is surely lying. */
    printf("Returned pointer: %p (should be %p).\n", p, (void *) 0);
    if (p)
	printf("Either you have 4 GB free RAM, or your malloc() has a bug.\n");
    else
	printf("malloc() returned NULL.  Your malloc() is OK.\n");

    return 0;
}