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("$FreeBSD$");
36 #include "namespace.h"
37 #include <sys/param.h>
42 #include "un-namespace.h"
44 #include "libc_private.h"
45 #include "gen-private.h"
49 * get next entry in a directory.
52 _readdir_unlocked(dirp, skip)
61 if (dirp->dd_loc >= dirp->dd_size) {
62 if (dirp->dd_flags & __DTF_READALL)
64 initial_loc = dirp->dd_loc;
65 dirp->dd_flags &= ~__DTF_SKIPREAD;
68 if (dirp->dd_loc == 0 &&
69 !(dirp->dd_flags & (__DTF_READALL | __DTF_SKIPREAD))) {
70 initial_seek = dirp->dd_seek;
71 dirp->dd_size = _getdirentries(dirp->dd_fd,
72 dirp->dd_buf, dirp->dd_len, &dirp->dd_seek);
73 if (dirp->dd_size <= 0)
75 _fixtelldir(dirp, initial_seek, initial_loc);
77 dirp->dd_flags &= ~__DTF_SKIPREAD;
78 dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
79 if ((long)dp & 03L) /* bogus pointer check */
81 if (dp->d_reclen <= 0 ||
82 dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc)
84 dirp->dd_loc += dp->d_reclen;
85 if (dp->d_ino == 0 && skip)
87 if (dp->d_type == DT_WHT && (dirp->dd_flags & DTF_HIDEW))
100 _pthread_mutex_lock(&dirp->dd_lock);
101 dp = _readdir_unlocked(dirp, 1);
102 _pthread_mutex_unlock(&dirp->dd_lock);
105 dp = _readdir_unlocked(dirp, 1);
110 readdir_r(dirp, entry, result)
112 struct dirent *entry;
113 struct dirent **result;
121 _pthread_mutex_lock(&dirp->dd_lock);
122 if ((dp = _readdir_unlocked(dirp, 1)) != NULL)
123 memcpy(entry, dp, _GENERIC_DIRSIZ(dp));
124 _pthread_mutex_unlock(&dirp->dd_lock);
126 else if ((dp = _readdir_unlocked(dirp, 1)) != NULL)
127 memcpy(entry, dp, _GENERIC_DIRSIZ(dp));