1  /* Test of fseeko() function.
       2     Copyright (C) 2011-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Eric Blake <eblake@redhat.com>, 2011.  */
      18  
      19  #include <config.h>
      20  
      21  #include <stdio.h>
      22  
      23  #include <stdlib.h>
      24  
      25  #include "macros.h"
      26  
      27  int
      28  main (int argc, char **argv)
      29  {
      30    int do_initial_ftell = atoi (argv[1]);
      31    const char *filename = argv[2];
      32    FILE *fp = fopen (filename, "r");
      33    ASSERT (fp != NULL);
      34  
      35    if (do_initial_ftell)
      36      {
      37        off_t pos = ftell (fp);
      38        ASSERT (pos == 0);
      39      }
      40  
      41    ASSERT (fseeko (fp, 0, SEEK_END) == 0);
      42  
      43    {
      44      off_t pos = ftell (fp);
      45      ASSERT (pos > 0);
      46    }
      47  
      48    ASSERT (fclose (fp) == 0);
      49  
      50    return 0;
      51  }