1 /* Test of ftello() function.
2 Copyright (C) 2011-2012 Free Software Foundation, Inc.
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.
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.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 main (int argc, char **argv)
29 const char *filename = argv[1];
31 /* Test that ftello() sets errno if someone else closes the stream
32 fd behind the back of stdio. */
34 FILE *fp = fopen (filename, "r");
36 setvbuf (fp, NULL, _IONBF, 0);
37 ASSERT (close (fileno (fp)) == 0);
39 ASSERT (ftello (fp) == (off_t)-1);
40 ASSERT (errno == EBADF);
44 /* Test that ftello() sets errno if the stream was constructed with
45 an invalid file descriptor. */
47 FILE *fp = fdopen (-1, "w");
51 ASSERT (ftello (fp) == (off_t)-1);
52 ASSERT (errno == EBADF);
57 FILE *fp = fdopen (99, "w");
61 ASSERT (ftello (fp) == (off_t)-1);
62 ASSERT (errno == EBADF);