stdio-common/tst-ferror.c

   1 #include <stdio.h>
   2
   3 int
   4 main (int argc, char *argv[])
   5 {
   6   char buf[100];
   7   int result = 0;
   8
   9   if (ferror (stdin) != 0)
  10     {
  11       fputs ("error bit set for stdin at startup\n", stdout);
  12       result = 1;
  13     }
  14   if (fgets (buf, sizeof buf, stdin) != buf)
  15     {
  16       fputs ("fgets with existing input has problem\n", stdout);
  17       result = 1;
  18     }
  19   if (ferror (stdin) != 0)
  20     {
  21       fputs ("error bit set for stdin after setup\n", stdout);
  22       result = 1;
  23     }
  24   if (fputc ('a', stdin) != EOF)
  25     {
  26       fputs ("fputc to stdin does not terminate with an error\n", stdout);
  27       result = 1;
  28     }
  29   if (ferror (stdin) == 0)
  30     {
  31       fputs ("error bit not set for stdin after fputc\n", stdout);
  32       result = 1;
  33     }
  34   clearerr (stdin);
  35   if (ferror (stdin) != 0)
  36     {
  37       fputs ("error bit set for stdin after clearerr\n", stdout);
  38       result = 1;
  39     }
  40   return result;
  41 }