1 /* Test changing to a directory named by a file descriptor.
2 Copyright (C) 2009 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/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
29 #define ASSERT(expr) \
34 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
44 char *cwd = getcwd (NULL, 0);
45 int fd = open (".", O_RDONLY);
51 /* Check for failure cases. */
53 int bad_fd = open ("/dev/null", O_RDONLY);
56 ASSERT (fchdir (bad_fd) == -1);
57 ASSERT (errno == ENOTDIR);
58 ASSERT (close (bad_fd) == 0);
60 ASSERT (fchdir (-1) == -1);
61 ASSERT (errno == EBADF);
64 /* Repeat test twice, once in '.' and once in '..'. */
65 for (i = 0; i < 2; i++)
67 ASSERT (chdir (".." + 1 - i) == 0);
68 ASSERT (fchdir (fd) == 0);
70 size_t len = strlen (cwd) + 1;
71 char *new_dir = malloc (len);
73 ASSERT (getcwd (new_dir, len) == new_dir);
74 ASSERT (strcmp (cwd, new_dir) == 0);
78 /* For second iteration, use a cloned fd, to ensure that dup
79 remembers whether an fd was associated with a directory. */
82 int new_fd = dup (fd);
84 ASSERT (close (fd) == 0);