1/* Copyright (C) 1993-2024 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. */
37DIR *
38_hurd_fd_opendir (struct hurd_fd *d)
39{
40 DIR *dirp;
41
42 if (d == NULL)
43 return __hurd_fail (EBADF), NULL;
44
45 dirp = (DIR *) malloc (size: sizeof (DIR));
46 if (dirp == NULL)
47 return NULL;
48
49 /* Set the descriptor to close on exec. */
50 HURD_CRITICAL_BEGIN;
51 __spin_lock (&d->port.lock);
52 d->flags |= FD_CLOEXEC;
53 __spin_unlock (&d->port.lock);
54 HURD_CRITICAL_END;
55
56 dirp->__fd = d;
57 dirp->__data = dirp->__ptr = NULL;
58 dirp->__entry_data = dirp->__entry_ptr = 0;
59 dirp->__allocation = 0;
60 dirp->__size = 0;
61
62 __libc_lock_init (dirp->__lock);
63
64 return dirp;
65}
66
67
68DIR *
69__opendirat (int dfd, const char *name)
70{
71 if (name[0] == '\0')
72 /* POSIX.1-1990 says an empty name gets ENOENT;
73 but `open' might like it fine. */
74 return __hurd_fail (ENOENT), NULL;
75
76 int flags = O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC;
77 int fd;
78#if IS_IN (rtld)
79 assert (dfd == AT_FDCWD);
80 fd = __open_nocancel (name, flags);
81#else
82 fd = __openat_nocancel (dfd, name, flags);
83#endif
84 if (fd < 0)
85 return NULL;
86
87 /* Extract the pointer to the descriptor structure. */
88 DIR *dirp = _hurd_fd_opendir (d: _hurd_fd_get (fd));
89 if (dirp == NULL)
90 __close (fd);
91
92 return dirp;
93}
94
95
96/* Open a directory stream on NAME. */
97DIR *
98__opendir (const char *name)
99{
100#if 0 /* TODO. */
101 return __opendirat (AT_FDCWD, name);
102#else
103 if (name[0] == '\0')
104 /* POSIX.1-1990 says an empty name gets ENOENT;
105 but `open' might like it fine. */
106 return __hurd_fail (ENOENT), NULL;
107
108 int fd = __open (name, O_RDONLY | O_NONBLOCK | O_DIRECTORY);
109 if (fd < 0)
110 return NULL;
111
112 /* Extract the pointer to the descriptor structure. */
113 DIR *dirp = _hurd_fd_opendir (d: _hurd_fd_get (fd));
114 if (dirp == NULL)
115 __close (fd);
116
117 return dirp;
118#endif
119}
120weak_alias (__opendir, opendir)
121

source code of glibc/sysdeps/mach/hurd/opendir.c