1 /* Open a directory stream from a file descriptor. Hurd version.
2 Copyright (C) 2005-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <dirent.h>
20 #include <errno.h>
21 #include <hurd.h>
22 #include <hurd/fd.h>
23 #include <fcntl.h>
24
25 DIR *_hurd_fd_opendir (struct hurd_fd *d); /* opendir.c */
26
27 /* Open a directory stream on FD. */
28 DIR *
__fdopendir(int fd)29 __fdopendir (int fd)
30 {
31 struct hurd_fd *d = _hurd_fd_get (fd);
32
33 if (d == NULL)
34 {
35 errno = EBADF;
36 return NULL;
37 }
38
39 /* Ensure that it's a directory. */
40 error_t err = HURD_FD_PORT_USE
41 (d, ({
42 file_t dir = __file_name_lookup_under (port, "./",
43 O_DIRECTORY | O_NOTRANS, 0);;
44 if (dir != MACH_PORT_NULL)
45 __mach_port_deallocate (__mach_task_self (), dir);
46 dir != MACH_PORT_NULL ? 0 : errno;
47 }));
48
49 if (err)
50 {
51 errno = err;
52 return NULL;
53 }
54
55 return _hurd_fd_opendir (d);
56 }
57 weak_alias (__fdopendir, fdopendir)
58