xref: /titanic_41/usr/src/uts/common/sys/dirent.h (revision b59b3655028aeb11832ad679eb5c2577c2b75235)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
22 /*	  All Rights Reserved  	*/
23 
24 
25 /*
26  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
27  *
28  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
29  * Use is subject to license terms.
30  */
31 
32 #ifndef _SYS_DIRENT_H
33 #define	_SYS_DIRENT_H
34 
35 #include <sys/feature_tests.h>
36 
37 #ifdef	__cplusplus
38 extern "C" {
39 #endif
40 
41 /*
42  * File-system independent directory entry.
43  */
44 typedef struct dirent {
45 	ino_t		d_ino;		/* "inode number" of entry */
46 	off_t		d_off;		/* offset of disk directory entry */
47 	unsigned short	d_reclen;	/* length of this record */
48 	char		d_name[1];	/* name of file */
49 } dirent_t;
50 
51 #if defined(_SYSCALL32)
52 
53 /* kernel's view of user ILP32 dirent */
54 
55 typedef	struct dirent32 {
56 	ino32_t		d_ino;		/* "inode number" of entry */
57 	off32_t		d_off;		/* offset of disk directory entry */
58 	uint16_t	d_reclen;	/* length of this record */
59 	char		d_name[1];	/* name of file */
60 } dirent32_t;
61 
62 #endif	/* _SYSCALL32 */
63 
64 #ifdef	_LARGEFILE64_SOURCE
65 
66 /*
67  * transitional large file interface version AND kernel internal version
68  */
69 typedef struct dirent64 {
70 	ino64_t		d_ino;		/* "inode number" of entry */
71 	off64_t		d_off;		/* offset of disk directory entry */
72 	unsigned short	d_reclen;	/* length of this record */
73 	char		d_name[1];	/* name of file */
74 } dirent64_t;
75 
76 #endif	/* _LARGEFILE64_SOURCE */
77 
78 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
79 #if defined(_KERNEL)
80 #define	DIRENT64_RECLEN(namelen)	\
81 	((offsetof(dirent64_t, d_name[0]) + 1 + (namelen) + 7) & ~ 7)
82 #define	DIRENT64_NAMELEN(reclen)	\
83 	((reclen) - (offsetof(dirent64_t, d_name[0])))
84 #define	DIRENT32_RECLEN(namelen)	\
85 	((offsetof(dirent32_t, d_name[0]) + 1 + (namelen) + 3) & ~ 3)
86 #define	DIRENT32_NAMELEN(reclen)	\
87 	((reclen) - (offsetof(dirent32_t, d_name[0])))
88 #endif
89 
90 /*
91  * This is the maximum number of bytes that getdents(2) will store in
92  * user-supplied dirent buffers.
93  */
94 #define	MAXGETDENTS_SIZE	(64 * 1024)
95 
96 #if !defined(_KERNEL)
97 
98 /*
99  * large file compilation environment setup
100  *
101  * In the LP64 compilation environment, map large file interfaces
102  * back to native versions where possible. (This only works because
103  * a 'struct dirent' == 'struct dirent64').
104  */
105 
106 #if !defined(_LP64) && _FILE_OFFSET_BITS == 64
107 #ifdef	__PRAGMA_REDEFINE_EXTNAME
108 #pragma redefine_extname	getdents	getdents64
109 #else
110 #define	getdents		getdents64
111 #endif
112 #endif	/* !_LP64 && _FILE_OFFSET_BITS == 64 */
113 
114 #if defined(_LP64) && defined(_LARGEFILE64_SOURCE)
115 #ifdef	__PRAGMA_REDEFINE_EXTNAME
116 #pragma	redefine_extname	getdents64	getdents
117 #else
118 #define	getdents64		getdents
119 #define	dirent64		dirent
120 #define	dirent64_t		dirent_t
121 #endif
122 #endif	/* _LP64 && _LARGEFILE64_SOURCE */
123 
124 extern int getdents(int, struct dirent *, size_t);
125 
126 /* N.B.: transitional large file interface version deliberately not provided */
127 
128 #endif /* !defined(_KERNEL) */
129 #endif /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
130 
131 #ifdef	__cplusplus
132 }
133 #endif
134 
135 #endif	/* _SYS_DIRENT_H */
136