1 /* Copyright (C) 1993-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <limits.h>
20 #include <stddef.h>
21 #include <string.h>
22 #include <dirent.h>
23 #include <unistd.h>
24 #include <sys/types.h>
25 #include <hurd.h>
26 #include <hurd/fd.h>
27 #include "dirstream.h"
28
29
30 /* Read a directory entry from DIRP. */
31 int
__readdir_r(DIR * dirp,struct dirent * entry,struct dirent ** result)32 __readdir_r (DIR *dirp, struct dirent *entry, struct dirent **result)
33 {
34 if (sizeof (struct dirent64) == sizeof (struct dirent))
35 /* We should in fact just be an alias to readdir64_r on this machine. */
36 return __readdir64_r (dirp,
37 (struct dirent64 *) entry,
38 (struct dirent64 **) result);
39
40 struct dirent64 *result64;
41 union
42 {
43 struct dirent64 d;
44 char b[offsetof (struct dirent64, d_name) + UCHAR_MAX + 1];
45 } u;
46 int err;
47
48 err = __readdir64_r (dirp, &u.d, &result64);
49 if (result64)
50 {
51 entry->d_fileno = result64->d_fileno;
52 entry->d_reclen = result64->d_reclen;
53 entry->d_type = result64->d_type;
54 entry->d_namlen = result64->d_namlen;
55 memcpy (entry->d_name, result64->d_name, result64->d_namlen + 1);
56 *result = entry;
57 }
58 else
59 *result = NULL;
60
61 return err;
62 }
63
64 weak_alias (__readdir_r, readdir_r)
65