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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)readdir.c 8.3 (Berkeley) 9/29/94";
36 #endif /* LIBC_SCCS and not lint */
37 #include <sys/cdefs.h>
38 __FBSDID("$FreeBSD$");
40 #include "namespace.h"
41 #include <sys/param.h>
46 #include "un-namespace.h"
48 #include "libc_private.h"
52 * get next entry in a directory.
55 _readdir_unlocked(dirp)
61 if (dirp->dd_loc >= dirp->dd_size) {
62 if (dirp->dd_flags & __DTF_READALL)
66 if (dirp->dd_loc == 0 && !(dirp->dd_flags & __DTF_READALL)) {
67 dirp->dd_size = _getdirentries(dirp->dd_fd,
68 dirp->dd_buf, dirp->dd_len, &dirp->dd_seek);
69 if (dirp->dd_size <= 0)
72 dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
73 if ((long)dp & 03L) /* bogus pointer check */
75 if (dp->d_reclen <= 0 ||
76 dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc)
78 dirp->dd_loc += dp->d_reclen;
81 if (dp->d_type == DT_WHT && (dirp->dd_flags & DTF_HIDEW))
94 _pthread_mutex_lock((pthread_mutex_t *)&dirp->dd_lock);
95 dp = _readdir_unlocked(dirp);
96 _pthread_mutex_unlock((pthread_mutex_t *)&dirp->dd_lock);
99 dp = _readdir_unlocked(dirp);
104 readdir_r(dirp, entry, result)
106 struct dirent *entry;
107 struct dirent **result;
115 _pthread_mutex_lock((pthread_mutex_t *)&dirp->dd_lock);
116 if ((dp = _readdir_unlocked(dirp)) != NULL)
117 memcpy(entry, dp, _GENERIC_DIRSIZ(dp));
118 _pthread_mutex_unlock((pthread_mutex_t *)&dirp->dd_lock);
120 else if ((dp = _readdir_unlocked(dirp)) != NULL)
121 memcpy(entry, dp, _GENERIC_DIRSIZ(dp));