tests/test-fseeko3.c

   1 /* Test of fseeko() function.
   2    Copyright (C) 2011-2020 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 }