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git.saurik.com Git - apple/libc.git/blob - gen/FreeBSD/readdir.c
a78c8b12d55c4903c3669471042c103e14a2ed34
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #if defined(LIBC_SCCS) && !defined(lint)
31 static char sccsid
[] = "@(#)readdir.c 8.3 (Berkeley) 9/29/94";
32 #endif /* LIBC_SCCS and not lint */
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: src/lib/libc/gen/readdir.c,v 1.15 2008/05/05 14:05:23 kib Exp $");
36 #include "namespace.h"
37 #include <sys/param.h>
42 #include "un-namespace.h"
44 #include "libc_private.h"
48 * get next entry in a directory.
51 _readdir_unlocked(dirp
, skip
)
58 if (dirp
->dd_loc
>= dirp
->dd_size
) {
59 if (dirp
->dd_flags
& __DTF_READALL
)
63 if (dirp
->dd_loc
== 0 && !(dirp
->dd_flags
& __DTF_READALL
)) {
64 dirp
->dd_size
= _getdirentries(dirp
->dd_fd
,
65 dirp
->dd_buf
, dirp
->dd_len
, &dirp
->dd_seek
);
66 if (dirp
->dd_size
<= 0)
69 dp
= (struct dirent
*)(dirp
->dd_buf
+ dirp
->dd_loc
);
70 if ((long)dp
& 03L) /* bogus pointer check */
72 if (dp
->d_reclen
<= 0 ||
73 dp
->d_reclen
> dirp
->dd_len
+ 1 - dirp
->dd_loc
)
75 dirp
->dd_loc
+= dp
->d_reclen
;
76 if (dp
->d_ino
== 0 && skip
)
78 if (dp
->d_type
== DT_WHT
&& (dirp
->dd_flags
& DTF_HIDEW
))
91 _pthread_mutex_lock(&dirp
->dd_lock
);
92 dp
= _readdir_unlocked(dirp
, 1);
93 _pthread_mutex_unlock(&dirp
->dd_lock
);
96 dp
= _readdir_unlocked(dirp
, 1);
101 readdir_r(dirp
, entry
, result
)
103 struct dirent
*entry
;
104 struct dirent
**result
;
112 _pthread_mutex_lock(&dirp
->dd_lock
);
113 if ((dp
= _readdir_unlocked(dirp
, 1)) != NULL
)
114 memcpy(entry
, dp
, _GENERIC_DIRSIZ(dp
));
115 _pthread_mutex_unlock(&dirp
->dd_lock
);
117 else if ((dp
= _readdir_unlocked(dirp
, 1)) != NULL
)
118 memcpy(entry
, dp
, _GENERIC_DIRSIZ(dp
));