src/regression/rewind-clear-error.c

   1 // commit: a6238c30d169cbac6bc4c4977622242063e32270 2011-02-22
   2 // rewind should clear error
   3 #include <stdio.h>
   4 #include <unistd.h>
   5 #include "test.h"
   6
   7 int main(void)
   8 {
   9         char buf[1];
  10         size_t n;
  11         int fd;
  12
  13         // make sure fread fails
  14         fd = dup(0);
  15         close(0);
  16
  17         n = fread(buf, 1, sizeof buf, stdin);
  18         if (n != 0 || !ferror(stdin))
  19                 t_error("fread(stdin) should have failed, got %d ferror %d feof %d\n",
  20                         n, ferror(stdin), feof(stdin));
  21         if (dup(fd) != 0)
  22                 t_error("dup failed\n");
  23
  24         rewind(stdin);
  25         if (ferror(stdin))
  26                 t_error("rewind failed to clear ferror\n");
  27         return t_status;
  28 }