FreeBSD/Linux Kernel Cross Reference
sys/sys/dirent.h
1 /* $OpenBSD: dirent.h,v 1.11 2013/12/13 18:09:27 zhuk Exp $ */
2 /* $NetBSD: dirent.h,v 1.12 1996/04/09 20:55:25 cgd Exp $ */
3
4 /*-
5 * Copyright (c) 1989, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)dirent.h 8.3 (Berkeley) 8/10/94
33 */
34
35 #ifndef _SYS_DIRENT_H_
36 #define _SYS_DIRENT_H_
37
38 #include <sys/cdefs.h>
39
40 /*
41 * The dirent structure defines the format of directory entries returned by
42 * the getdents(2) system call.
43 *
44 * A directory entry has a struct dirent at the front of it, containing its
45 * inode number, the length of the entry, and the length of the name
46 * contained in the entry. These are followed by the name padded to a 4
47 * byte boundary with null bytes. All names are guaranteed null terminated.
48 * The maximum length of a name in a directory is MAXNAMLEN.
49 */
50
51 struct dirent {
52 __ino_t d_fileno; /* file number of entry */
53 __off_t d_off; /* offset after this entry */
54 __uint16_t d_reclen; /* length of this record */
55 __uint8_t d_type; /* file type, see below */
56 __uint8_t d_namlen; /* length of string in d_name */
57 __uint8_t __d_padding[4]; /* suppress padding after d_name */
58 #if __BSD_VISIBLE
59 #define MAXNAMLEN 255
60 char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */
61 #else
62 char d_name[255 + 1]; /* name must be no longer than this */
63 #endif
64 };
65
66 #if __BSD_VISIBLE
67 /*
68 * File types
69 */
70 #define DT_UNKNOWN 0
71 #define DT_FIFO 1
72 #define DT_CHR 2
73 #define DT_DIR 4
74 #define DT_BLK 6
75 #define DT_REG 8
76 #define DT_LNK 10
77 #define DT_SOCK 12
78
79 /*
80 * Convert between stat structure types and directory types.
81 */
82 #define IFTODT(mode) (((mode) & 0170000) >> 12)
83 #define DTTOIF(dirtype) ((dirtype) << 12)
84
85 #ifdef _KERNEL
86 /*
87 * The DIRENT_RECSIZE macro gives the minimum record length which will hold
88 * a directory entry with a name of the given length, including the terminating
89 * nul byte, rounded up to proper alignment.
90 * The DIRENT_SIZE macro does the same when given a pointer to a struct dirent
91 */
92 #define DIRENT_RECSIZE(namelen) \
93 ((offsetof(struct dirent, d_name) + (namelen) + 1 + 7) &~ 7)
94 #define DIRENT_SIZE(dp) \
95 DIRENT_RECSIZE((dp)->d_namlen)
96 #endif
97
98 #endif /* __BSD_VISIBLE */
99
100 #endif /* _SYS_DIRENT_H_ */
Cache object: e7f68acd3783b2b4e126f059de2975da
|