xnu-1504.7.4.tar.gz

[apple/xnu.git] / bsd / sys / dirent.h

/*
 * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
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 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
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/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)dirent.h	8.3 (Berkeley) 8/10/94
 */

/*
 * The dirent structure defines the format of directory entries.
 *
 * A directory entry has a struct dirent at the front of it, containing its
 * inode number, the length of the entry, and the length of the name
 * contained in the entry.  These are followed by the name padded to a 4
 * byte boundary with null bytes.  All names are guaranteed null terminated.
 * The maximum length of a name in a directory is MAXNAMLEN when 32-bit
 * ino_t is in effect; (MAXPATHLEN - 1) when 64-bit ino_t is in effect.
 */

#ifndef _SYS_DIRENT_H 
#define _SYS_DIRENT_H 

#include <sys/_types.h>
#include <sys/cdefs.h>

#ifndef	_INO_T
typedef	__darwin_ino_t	ino_t;		/* inode number */
#define _INO_T
#endif


#define __DARWIN_MAXNAMLEN	255

#pragma pack(4)

#if !__DARWIN_64_BIT_INO_T
struct dirent {
	ino_t d_ino;			/* file number of entry */
	__uint16_t d_reclen;		/* length of this record */
	__uint8_t  d_type; 		/* file type, see below */
	__uint8_t  d_namlen;		/* length of string in d_name */
	char d_name[__DARWIN_MAXNAMLEN + 1];	/* name must be no longer than this */
};
#endif /* !__DARWIN_64_BIT_INO_T */

#pragma pack()

#define __DARWIN_MAXPATHLEN	1024

#define __DARWIN_STRUCT_DIRENTRY { \
	__uint64_t  d_ino;      /* file number of entry */ \
	__uint64_t  d_seekoff;  /* seek offset (optional, used by servers) */ \
	__uint16_t  d_reclen;   /* length of this record */ \
	__uint16_t  d_namlen;   /* length of string in d_name */ \
	__uint8_t   d_type;     /* file type, see below */ \
	char      d_name[__DARWIN_MAXPATHLEN]; /* entry name (up to MAXPATHLEN bytes) */ \
}

#if __DARWIN_64_BIT_INO_T
struct dirent __DARWIN_STRUCT_DIRENTRY;
#endif /* __DARWIN_64_BIT_INO_T */

#ifdef KERNEL
/* Extended directory entry */
struct direntry __DARWIN_STRUCT_DIRENTRY;
#endif


#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
#define	d_fileno	d_ino		/* backward compatibility */
#define	MAXNAMLEN	__DARWIN_MAXNAMLEN
/*
 * File types
 */
#define	DT_UNKNOWN	 0
#define	DT_FIFO		 1
#define	DT_CHR		 2
#define	DT_DIR		 4
#define	DT_BLK		 6
#define	DT_REG		 8
#define	DT_LNK		10
#define	DT_SOCK		12
#define	DT_WHT		14

/*
 * Convert between stat structure types and directory types.
 */
#define	IFTODT(mode)	(((mode) & 0170000) >> 12)
#define	DTTOIF(dirtype)	((dirtype) << 12)
#endif

#endif /* _SYS_DIRENT_H  */