#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/resource.h>

#define LIMIT 1000000

int

main (void)

{

  struct rlimit lim;

  getrlimit (RLIMIT_STACK, &lim);

  lim.rlim_cur = 1048576;

  setrlimit (RLIMIT_STACK, &lim);

  char *fmtstr = malloc (4 * LIMIT + 1);

  if (fmtstr == NULL)

    abort ();

  char *output = malloc (LIMIT + 1);

  if (output == NULL)

    abort ();

  for (size_t i = 0; i < LIMIT; i++)

    memcpy (fmtstr + 4 * i, "%1$d", 4);

  fmtstr[4 * LIMIT] = '\0';

  int ret = snprintf (output, LIMIT + 1, fmtstr, 0);

  if (ret != LIMIT)

    abort ();

  for (size_t i = 0; i < LIMIT; i++)

    if (output[i] != '0')

      abort ();

  return 0;

}