1 | /* Copyright (C) 1993-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library 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 GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <limits.h> |
20 | #include <stddef.h> |
21 | #include <stdlib.h> |
22 | #include <string.h> |
23 | #include <dirent.h> |
24 | #include <fcntl.h> |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> |
27 | #include <unistd.h> |
28 | #include <stdio.h> |
29 | #include <hurd.h> |
30 | #include <hurd/fd.h> |
31 | #include <not-cancel.h> |
32 | #include "dirstream.h" |
33 | |
34 | |
35 | /* Open a directory stream on a file descriptor in Hurd internal form. |
36 | We do no checking here on the descriptor. */ |
37 | DIR * |
38 | _hurd_fd_opendir (struct hurd_fd *d) |
39 | { |
40 | DIR *dirp; |
41 | |
42 | if (d == NULL) |
43 | { |
44 | errno = EBADF; |
45 | return NULL; |
46 | } |
47 | |
48 | dirp = (DIR *) malloc (size: sizeof (DIR)); |
49 | if (dirp == NULL) |
50 | return NULL; |
51 | |
52 | /* Set the descriptor to close on exec. */ |
53 | HURD_CRITICAL_BEGIN; |
54 | __spin_lock (&d->port.lock); |
55 | d->flags |= FD_CLOEXEC; |
56 | __spin_unlock (&d->port.lock); |
57 | HURD_CRITICAL_END; |
58 | |
59 | dirp->__fd = d; |
60 | dirp->__data = dirp->__ptr = NULL; |
61 | dirp->__entry_data = dirp->__entry_ptr = 0; |
62 | dirp->__allocation = 0; |
63 | dirp->__size = 0; |
64 | |
65 | __libc_lock_init (dirp->__lock); |
66 | |
67 | return dirp; |
68 | } |
69 | |
70 | |
71 | DIR * |
72 | __opendirat (int dfd, const char *name) |
73 | { |
74 | if (name[0] == '\0') |
75 | { |
76 | /* POSIX.1-1990 says an empty name gets ENOENT; |
77 | but `open' might like it fine. */ |
78 | __set_errno (ENOENT); |
79 | return NULL; |
80 | } |
81 | |
82 | int flags = O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC; |
83 | int fd; |
84 | #if IS_IN (rtld) |
85 | assert (dfd == AT_FDCWD); |
86 | fd = __open_nocancel (name, flags); |
87 | #else |
88 | fd = __openat_nocancel (dfd, name, flags); |
89 | #endif |
90 | if (fd < 0) |
91 | return NULL; |
92 | |
93 | /* Extract the pointer to the descriptor structure. */ |
94 | DIR *dirp = _hurd_fd_opendir (d: _hurd_fd_get (fd)); |
95 | if (dirp == NULL) |
96 | __close (fd); |
97 | |
98 | return dirp; |
99 | } |
100 | |
101 | |
102 | /* Open a directory stream on NAME. */ |
103 | DIR * |
104 | __opendir (const char *name) |
105 | { |
106 | #if 0 /* TODO. */ |
107 | return __opendirat (AT_FDCWD, name); |
108 | #else |
109 | if (name[0] == '\0') |
110 | { |
111 | /* POSIX.1-1990 says an empty name gets ENOENT; |
112 | but `open' might like it fine. */ |
113 | __set_errno (ENOENT); |
114 | return NULL; |
115 | } |
116 | |
117 | int fd = __open (name, O_RDONLY | O_NONBLOCK | O_DIRECTORY); |
118 | if (fd < 0) |
119 | return NULL; |
120 | |
121 | /* Extract the pointer to the descriptor structure. */ |
122 | DIR *dirp = _hurd_fd_opendir (d: _hurd_fd_get (fd)); |
123 | if (dirp == NULL) |
124 | __close (fd); |
125 | |
126 | return dirp; |
127 | #endif |
128 | } |
129 | weak_alias (__opendir, opendir) |
130 | |