1 /* Test isatty() 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/>. */
21 #include "signature.h"
22 SIGNATURE_CHECK (isatty, int, (int));
29 /* The name of the "always silent" device. */
30 #if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
31 /* Native Windows API. */
32 # define DEV_NULL "NUL"
35 # define DEV_NULL "/dev/null"
41 const char *file = "test-isatty.txt";
43 /* Test behaviour for invalid file descriptors. */
46 ASSERT (isatty (-1) == 0);
47 ASSERT (errno == EBADF
48 || errno == 0 /* seen on Solaris 10 */
53 ASSERT (isatty (99) == 0);
54 ASSERT (errno == EBADF
55 || errno == 0 /* seen on Solaris 10 */
59 /* Test behaviour for regular files. */
63 fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
65 ASSERT (write (fd, "hello", 5) == 5);
66 ASSERT (close (fd) == 0);
68 fd = open (file, O_RDONLY);
70 ASSERT (! isatty (fd));
71 ASSERT (close (fd) == 0);
74 /* Test behaviour for pipes. */
78 ASSERT (pipe (fd) == 0);
79 ASSERT (! isatty (fd[0]));
80 ASSERT (! isatty (fd[1]));
81 ASSERT (close (fd[0]) == 0);
82 ASSERT (close (fd[1]) == 0);
85 /* Test behaviour for /dev/null. */
89 fd = open (DEV_NULL, O_RDONLY);
91 ASSERT (! isatty (fd));
92 ASSERT (close (fd) == 0);
95 ASSERT (unlink (file) == 0);