stdio-common/bug23-4.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <sys/resource.h>
   5
   6 #define LIMIT 1000000
   7
   8 int
   9 main (void)
  10 {
  11   struct rlimit lim;
  12   getrlimit (RLIMIT_STACK, &lim);
  13   lim.rlim_cur = 1048576;
  14   setrlimit (RLIMIT_STACK, &lim);
  15   char *fmtstr = malloc (4 * LIMIT + 1);
  16   if (fmtstr == NULL)
  17     abort ();
  18   char *output = malloc (LIMIT + 1);
  19   if (output == NULL)
  20     abort ();
  21   for (size_t i = 0; i < LIMIT; i++)
  22     memcpy (fmtstr + 4 * i, "%1$d", 4);
  23   fmtstr[4 * LIMIT] = '\0';
  24   int ret = snprintf (output, LIMIT + 1, fmtstr, 0);
  25   if (ret != LIMIT)
  26     abort ();
  27   for (size_t i = 0; i < LIMIT; i++)
  28     if (output[i] != '0')
  29       abort ();
  30   return 0;
  31 }