1 /* $NetBSD: opendir.c,v 1.38 2011/10/15 23:00:01 christos Exp $ */
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/cdefs.h>
33 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid
[] = "@(#)opendir.c 8.7 (Berkeley) 12/10/94";
37 __RCSID("$NetBSD: opendir.c,v 1.38 2011/10/15 23:00:01 christos Exp $");
39 #endif /* LIBC_SCCS and not lint */
41 #include "namespace.h"
42 #include "reentrant.h"
45 #include <sys/cdefs.h>
46 #include <sys/types.h>
48 #if !defined(O_CLOEXEC)
56 #include <sys/param.h>
57 #include <sys/mount.h>
68 #include "dirent_private.h"
70 static DIR *__opendir_common(int, const char *, int);
72 __weak_alias(fdopendir
,_fdopendir
)
74 #if defined(__weak_alias) && defined(__minix)
75 __weak_alias(opendir
,__opendir230
)
82 opendir(const char *name
)
85 _DIAGASSERT(name
!= NULL
);
87 return (__opendir2(name
, DTF_HIDEW
|DTF_NODUP
));
91 __opendir2(const char *name
, int flags
)
95 if ((fd
= open(name
, O_RDONLY
| O_NONBLOCK
| O_CLOEXEC
)) == -1)
98 if (fcntl(fd
, F_SETFD
, FD_CLOEXEC
) == -1) {
102 #endif /* defined(__minix) */
104 return __opendir_common(fd
, name
, flags
);
107 #ifndef __LIBC12_SOURCE__
111 if (fcntl(fd
, F_SETFD
, FD_CLOEXEC
) == -1)
114 return __opendir_common(fd
, NULL
, DTF_HIDEW
|DTF_NODUP
);
119 __opendir_common(int fd
, const char *name
, int flags
)
129 if (fstat(fd
, &sb
) || !S_ISDIR(sb
.st_mode
)) {
133 if ((dirp
= malloc(sizeof(*dirp
))) == NULL
)
136 dirp
->dd_internal
= NULL
;
139 if ((dirp
->dd_lock
= malloc(sizeof(mutex_t
))) == NULL
)
141 mutex_init((mutex_t
*)dirp
->dd_lock
, NULL
);
146 * Tweak flags for the underlying filesystem.
150 /* MOUNT_UNION and MOUNT_NFS not supported */
153 if (fstatvfs1(fd
, &sfb
, ST_NOWAIT
) < 0)
155 if ((flags
& DTF_NODUP
) != 0) {
156 if (!strncmp(sfb
.f_fstypename
, MOUNT_UNION
,
157 sizeof(sfb
.f_fstypename
)) ||
158 (sfb
.f_flag
& MNT_UNION
) != 0) {
159 flags
|= __DTF_READALL
;
164 if (!strncmp(sfb
.f_fstypename
, MOUNT_NFS
, sizeof(sfb
.f_fstypename
))) {
165 flags
|= __DTF_READALL
| __DTF_RETRY_ON_BADCOOKIE
;
169 dirp
->dd_flags
= flags
;
170 error
= _initdir(dirp
, fd
, name
);
182 mutex_destroy((mutex_t
*)dirp
->dd_lock
);