2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
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8 * modification, are permitted provided that the following conditions
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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
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21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 #include <sys/cdefs.h>
33 __SCCSID("@(#)readdir.c 8.3 (Berkeley) 9/29/94");
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(DIR *dirp, int flags)
59 if (dirp->dd_loc >= dirp->dd_size) {
60 if (dirp->dd_flags & __DTF_READALL)
62 initial_loc = dirp->dd_loc;
63 dirp->dd_flags &= ~__DTF_SKIPREAD;
66 if (dirp->dd_loc == 0 &&
67 !(dirp->dd_flags & (__DTF_READALL | __DTF_SKIPREAD))) {
68 initial_seek = dirp->dd_seek;
69 dirp->dd_size = _getdirentries(dirp->dd_fd,
70 dirp->dd_buf, dirp->dd_len, &dirp->dd_seek);
71 if (dirp->dd_size <= 0)
73 _fixtelldir(dirp, initial_seek, initial_loc);
75 dirp->dd_flags &= ~__DTF_SKIPREAD;
76 dp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
77 if ((long)dp & 03L) /* bogus pointer check */
79 if (dp->d_reclen <= 0 ||
80 dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc)
82 dirp->dd_loc += dp->d_reclen;
83 if (dp->d_ino == 0 && (flags & RDU_SKIP) != 0)
85 if (dp->d_type == DT_WHT && (dirp->dd_flags & DTF_HIDEW))
87 if (dp->d_namlen >= sizeof(dp->d_name) &&
88 (flags & RDU_SHORT) != 0)
100 _pthread_mutex_lock(&dirp->dd_lock);
101 dp = _readdir_unlocked(dirp, RDU_SKIP);
103 _pthread_mutex_unlock(&dirp->dd_lock);
108 __readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
116 _pthread_mutex_lock(&dirp->dd_lock);
117 dp = _readdir_unlocked(dirp, RDU_SKIP | RDU_SHORT);
119 memcpy(entry, dp, _GENERIC_DIRSIZ(dp));
121 _pthread_mutex_unlock(&dirp->dd_lock);
137 __strong_reference(__readdir_r, readdir_r);