1 /* Test of fgetc() 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 (fgetc, int, (FILE *));
32 main (int argc, char **argv)
34 const char *filename = "test-fgetc.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 fgetc() sets errno if someone else closes the stream
46 fd behind the back of stdio. */
48 FILE *fp = fopen (filename, "r");
50 ASSERT (close (fileno (fp)) == 0);
52 ASSERT (fgetc (fp) == EOF);
53 ASSERT (errno == EBADF);
57 /* Test that fgetc() sets errno if the stream was constructed with
58 an invalid file descriptor. */
60 FILE *fp = fdopen (-1, "r");
64 ASSERT (fgetc (fp) == EOF);
65 ASSERT (errno == EBADF);
70 FILE *fp = fdopen (99, "r");
74 ASSERT (fgetc (fp) == EOF);
75 ASSERT (errno == EBADF);