#include <stdio.h>

#include <sys/types.h>

static int

check (FILE *fp, off_t o)

{

  int result = 0;

  if (feof (fp))

    {

      puts ("feof !");

      result = 1;

    }

  if (ferror (fp))

    {

      puts ("ferror !");

      result = 1;

    }

  if (ftello (fp) != o)

    {

      printf ("position = %lu, not %lu\n", (unsigned long int) ftello (fp),

	      (unsigned long int) o);

      result = 1;

    }

  return result;

}

static int

do_test (void)

{

  FILE *fp = tmpfile ();

  if (fp == NULL)

    {

      puts ("tmpfile failed");

      return 1;

    }

  if (check (fp, 0) != 0)

    return 1;

  puts ("going to write");

  if (fputs ("hello", fp) == EOF)

    {

      puts ("fputs failed");

      return 1;

    }

  if (check (fp, 5) != 0)

    return 1;

  puts ("going to rewind");

  rewind (fp);

  if (check (fp, 0) != 0)

    return 1;

  puts ("going to read char");

  int c = fgetc (fp);

  if (c != 'h')

    {

      printf ("read %c, not %c\n", c, 'h');

      return 1;

    }

  if (check (fp, 1) != 0)

    return 1;

  puts ("going to put back");

  if (ungetc (' ', fp) == EOF)

    {

      puts ("ungetc failed");

      return 1;

    }

  if (check (fp, 0) != 0)

    return 1;

  puts ("going to write again");

  if (fputs ("world", fp) == EOF)

    {

      puts ("2nd fputs failed");

      return 1;

    }

  if (check (fp, 5) != 0)

    return 1;

  puts ("going to rewind again");

  rewind (fp);

  if (check (fp, 0) != 0)

    return 1;

  if (fclose (fp) != 0)

    {

      puts ("fclose failed");

      return 1;

    }

  return 0;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"