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

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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 returned by 
 * the getdirentries(2) system call.
 *
 * 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.
 */

#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

#if __DARWIN_ALIGN_POWER
#pragma options align=power
#endif

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 */
};

#if __DARWIN_ALIGN_POWER
#pragma options align=reset
#endif

#ifdef KERNEL
#include <sys/kernel_types.h>

/* Extended directory entry */
struct direntry{
	ino64_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 */
	u_char      d_name[MAXPATHLEN - 1]; /* entry name (up to MAXPATHLEN - 1 bytes) */
};
#endif


#ifndef _POSIX_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  */