1 /* Test of fread() function.
2 Copyright (C) 2011 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, or (at your option)
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, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
22 #include "signature.h"
23 SIGNATURE_CHECK (fread, size_t, (void *, size_t, size_t, FILE *));
32 main (int argc, char **argv)
34 const char *filename = "test-fread.txt";
38 const char text[] = "hello world";
39 int fd = open (filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
41 ASSERT (write (fd, text, sizeof (text)) == sizeof (text));
42 ASSERT (close (fd) == 0);
45 /* Test that fread() sets errno if someone else closes the stream
46 fd behind the back of stdio. */
48 FILE *fp = fopen (filename, "r");
51 ASSERT (close (fileno (fp)) == 0);
53 ASSERT (fread (buf, 1, sizeof (buf), fp) == 0);
54 ASSERT (errno == EBADF);
59 /* Test that fread() sets errno if the stream was constructed with
60 an invalid file descriptor. */
62 FILE *fp = fdopen (-1, "r");
67 ASSERT (fread (buf, 1, 1, fp) == 0);
68 ASSERT (errno == EBADF);
74 FILE *fp = fdopen (99, "r");
79 ASSERT (fread (buf, 1, 1, fp) == 0);
80 ASSERT (errno == EBADF);