1 /* Test changing to a directory named by a file descriptor.
2 Copyright (C) 2009-2011 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 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. */
23 #include "signature.h"
24 SIGNATURE_CHECK (fchdir, int, (int));
41 cwd = getcwd (NULL, 0);
44 fd = open (".", O_RDONLY);
47 /* Test behaviour for invalid file descriptors. */
50 ASSERT (fchdir (-1) == -1);
51 ASSERT (errno == EBADF);
55 ASSERT (fchdir (99) == -1);
56 ASSERT (errno == EBADF);
59 /* Check for other failure cases. */
61 int bad_fd = open ("/dev/null", O_RDONLY);
64 ASSERT (fchdir (bad_fd) == -1);
65 ASSERT (errno == ENOTDIR);
66 ASSERT (close (bad_fd) == 0);
69 /* Repeat test twice, once in '.' and once in '..'. */
70 for (i = 0; i < 2; i++)
72 ASSERT (chdir (".." + 1 - i) == 0);
73 ASSERT (fchdir (fd) == 0);
75 size_t len = strlen (cwd) + 1;
76 char *new_dir = malloc (len);
78 ASSERT (getcwd (new_dir, len) == new_dir);
79 ASSERT (strcmp (cwd, new_dir) == 0);
83 /* For second iteration, use a cloned fd, to ensure that dup
84 remembers whether an fd was associated with a directory. */
87 int new_fd = dup (fd);
89 ASSERT (close (fd) == 0);
90 ASSERT (dup2 (new_fd, fd) == fd);
91 ASSERT (close (new_fd) == 0);
92 ASSERT (dup_cloexec (fd) == new_fd);
93 ASSERT (dup2 (new_fd, fd) == fd);
94 ASSERT (close (new_fd) == 0);
95 ASSERT (fcntl (fd, F_DUPFD_CLOEXEC, new_fd) == new_fd);
96 ASSERT (close (fd) == 0);
97 ASSERT (fcntl (new_fd, F_DUPFD, fd) == fd);
98 ASSERT (close (new_fd) == 0);
100 ASSERT (dup3 (fd, new_fd, 0) == new_fd);
101 ASSERT (dup3 (new_fd, fd, 0) == fd);
102 ASSERT (close (new_fd) == 0);