1 /* Copyright (C) 1993,94,95,96,97,2002 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 /* Read a directory entry from DIRP. */
30 struct dirent64 *entry64 = __readdir64 (dirp);
32 if (sizeof (struct dirent64) == sizeof (struct dirent))
33 /* We should in fact just be an alias to readdir64 on this machine. */
34 return (struct dirent *) entry64;
36 /* These are all compile-time constants. We know that d_ino is the first
37 member and that the layout of the following members matches exactly in
39 assert (offsetof (struct dirent, d_ino) == 0);
40 assert (offsetof (struct dirent64, d_ino) == 0);
41 # define MATCH(memb) \
42 assert (offsetof (struct dirent64, memb) - sizeof (entry64->d_ino) \
43 == offsetof (struct dirent, memb) - sizeof (ino_t))
52 struct dirent *const entry = ((void *) (&entry64->d_ino + 1)
53 - sizeof entry->d_ino);
54 const ino_t d_ino = entry64->d_ino;
55 if (d_ino != entry64->d_ino)
57 __set_errno (EOVERFLOW);
60 # if BYTE_ORDER != BIG_ENDIAN /* We just skipped over the zero high word. */
61 entry->d_ino = d_ino; /* ... or the nonzero low word, swap it. */
63 entry->d_reclen -= sizeof entry64->d_ino - sizeof entry->d_ino;
67 weak_alias (__readdir, readdir)