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. */
31 #define ASSERT(expr) \
36 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
46 char *cwd = getcwd (NULL, 0);
47 int fd = open (".", O_RDONLY);
53 /* Check for failure cases. */
55 int bad_fd = open ("/dev/null", O_RDONLY);
58 ASSERT (fchdir (bad_fd) == -1);
59 ASSERT (errno == ENOTDIR);
60 ASSERT (close (bad_fd) == 0);
62 ASSERT (fchdir (-1) == -1);
63 ASSERT (errno == EBADF);
66 /* Repeat test twice, once in '.' and once in '..'. */
67 for (i = 0; i < 2; i++)
69 ASSERT (chdir (".." + 1 - i) == 0);
70 ASSERT (fchdir (fd) == 0);
72 size_t len = strlen (cwd) + 1;
73 char *new_dir = malloc (len);
75 ASSERT (getcwd (new_dir, len) == new_dir);
76 ASSERT (strcmp (cwd, new_dir) == 0);
80 /* For second iteration, use a cloned fd, to ensure that dup
81 remembers whether an fd was associated with a directory. */
84 int new_fd = dup (fd);
86 ASSERT (close (fd) == 0);
87 ASSERT (dup2 (new_fd, fd) == fd);
88 ASSERT (close (new_fd) == 0);
89 ASSERT (dup_cloexec (fd) == new_fd);
90 ASSERT (dup2 (new_fd, fd) == fd);
91 ASSERT (close (new_fd) == 0);