1 /* Test opening a directory stream from a file descriptor.
2 Copyright (C) 2009-2024 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 <https://www.gnu.org/licenses/>. */
17 /* Written by Eric Blake <ebb9@byu.net>, 2009. */
23 #include "signature.h"
24 SIGNATURE_CHECK (fdopendir
, DIR *, (int));
38 /* A non-directory cannot be turned into a directory stream. */
39 fd
= open ("test-fdopendir.tmp", O_RDONLY
| O_CREAT
, 0600);
42 ASSERT (fdopendir (fd
) == NULL
);
43 ASSERT (errno
== ENOTDIR
);
44 ASSERT (close (fd
) == 0);
45 ASSERT (unlink ("test-fdopendir.tmp") == 0);
47 /* A bad fd cannot be turned into a stream. */
50 ASSERT (fdopendir (-1) == NULL
);
51 ASSERT (errno
== EBADF
);
56 ASSERT (fdopendir (99) == NULL
);
57 ASSERT (errno
== EBADF
);
62 ASSERT (fdopendir (AT_FDCWD
) == NULL
);
63 ASSERT (errno
== EBADF
);
67 /* This should work. */
68 fd
= open (".", O_RDONLY
);
72 /* fdopendir should not close fd. */
73 ASSERT (dup2 (fd
, fd
) == fd
);
75 /* Don't test dirfd here. dirfd (d) must return fd on current POSIX
76 platforms, but on pre-2008 platforms or on non-POSIX platforms
77 dirfd (fd) might return some other descriptor, or -1, and gnulib
78 does not work around this porting problem. */
80 ASSERT (closedir (d
) == 0);
81 /* Now we can guarantee that fd must be closed. */
83 ASSERT (dup2 (fd
, fd
) == -1);
84 ASSERT (errno
== EBADF
);
86 return test_exit_status
;