stdio-common/bug12.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 char x[4096], z[4096], b[21], m[4096 * 4];
   5
   6 int
   7 main (void)
   8 {
   9   FILE *f = tmpfile ();
  10   int i, failed = 0;
  11
  12   memset (x, 'x', 4096);
  13   memset (z, 'z', 4096);
  14   b[20] = 0;
  15
  16   for (i = 0; i <= 5; i++)
  17     {
  18       fwrite (x, 4096, 1, f);
  19       fwrite (z, 4096, 1, f);
  20     }
  21   rewind (f);
  22
  23   fread (m, 4096 * 4 - 10, 1, f);
  24   fread (b, 20, 1, f);
  25   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
  26   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
  27     failed = 1;
  28
  29   fseek (f, -40, SEEK_CUR);
  30   fread (b, 20, 1, f);
  31   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzzzzzzzzzzz");
  32   if (strcmp (b, "zzzzzzzzzzzzzzzzzzzz"))
  33     failed = 1;
  34
  35   fread (b, 20, 1, f);
  36   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
  37   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
  38     failed = 1;
  39
  40   fread (b, 20, 1, f);
  41   printf ("got %s (should be %s)\n", b, "xxxxxxxxxxxxxxxxxxxx");
  42   if (strcmp (b, "xxxxxxxxxxxxxxxxxxxx"))
  43     failed = 1;
  44
  45   return failed;
  46 }