xref: /onnv-gate/usr/src/lib/libbc/inc/include/sys/dirent.h (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1989 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate /*      Copyright (c) 1984 AT&T */
28*0Sstevel@tonic-gate /*        All Rights Reserved   */
29*0Sstevel@tonic-gate 
30*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
31*0Sstevel@tonic-gate 
32*0Sstevel@tonic-gate /*
33*0Sstevel@tonic-gate  * Filesystem-independent directory information.
34*0Sstevel@tonic-gate  * Directory entry structures are of variable length.
35*0Sstevel@tonic-gate  * Each directory entry is a struct dirent containing its file number, the
36*0Sstevel@tonic-gate  * offset of the next entry (a cookie interpretable only the filesystem
37*0Sstevel@tonic-gate  * type that generated it), the length of the entry, and the length of the
38*0Sstevel@tonic-gate  * name contained in the entry.  These are followed by the name. The
39*0Sstevel@tonic-gate  * entire entry is padded with null bytes to a 4 byte boundary. All names
40*0Sstevel@tonic-gate  * are guaranteed null terminated. The maximum length of a name in a
41*0Sstevel@tonic-gate  * directory is MAXNAMLEN, plus a null byte.
42*0Sstevel@tonic-gate  */
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate #ifndef	__sys_dirent_h
45*0Sstevel@tonic-gate #define	__sys_dirent_h
46*0Sstevel@tonic-gate 
47*0Sstevel@tonic-gate struct	dirent {
48*0Sstevel@tonic-gate 	off_t		d_off;		/* offset of next disk dir entry */
49*0Sstevel@tonic-gate 	unsigned long	d_fileno;	/* file number of entry */
50*0Sstevel@tonic-gate 	unsigned short	d_reclen;	/* length of this record */
51*0Sstevel@tonic-gate 	unsigned short	d_namlen;	/* length of string in d_name */
52*0Sstevel@tonic-gate 	char		d_name[255+1];	/* name (up to MAXNAMLEN + 1) */
53*0Sstevel@tonic-gate };
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate #ifndef	_POSIX_SOURCE
56*0Sstevel@tonic-gate /*
57*0Sstevel@tonic-gate  * It's unlikely to change, but make sure that sizeof d_name above is
58*0Sstevel@tonic-gate  * at least MAXNAMLEN + 1 (more may be added for padding).
59*0Sstevel@tonic-gate  */
60*0Sstevel@tonic-gate #define	MAXNAMLEN	255
61*0Sstevel@tonic-gate /*
62*0Sstevel@tonic-gate  * The macro DIRSIZ(dp) gives the minimum amount of space required to represent
63*0Sstevel@tonic-gate  * a directory entry.  For any directory entry dp->d_reclen >= DIRSIZ(dp).
64*0Sstevel@tonic-gate  * Specific filesystem types may use this macro to construct the value
65*0Sstevel@tonic-gate  * for d_reclen.
66*0Sstevel@tonic-gate  */
67*0Sstevel@tonic-gate #undef	DIRSIZ
68*0Sstevel@tonic-gate #define	DIRSIZ(dp) \
69*0Sstevel@tonic-gate 	(((sizeof(struct dirent) - (MAXNAMLEN+1) + ((dp)->d_namlen+1)) +3) & ~3)
70*0Sstevel@tonic-gate 
71*0Sstevel@tonic-gate #endif	/* !_POSIX_SOURCE */
72*0Sstevel@tonic-gate #endif	/* !__sys_dirent_h */
73