/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * 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. 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
 * $FreeBSD: head/sys/sys/dirent.h 335494 2018-06-21 16:40:07Z bdrewery $
 */

#ifndef	_SYS_DIRENT_H_
#define	_SYS_DIRENT_H_

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

#ifndef _INO_T_DECLARED
typedef	__ino_t		ino_t;
#define	_INO_T_DECLARED
#endif

#ifndef _OFF_T_DECLARED
typedef	__off_t		off_t;
#define	_OFF_T_DECLARED
#endif

typedef struct _dirdesc {
	int	dd_fd;
	long	dd_loc;
	long	dd_size;
	char	*dd_buf;
	int	dd_len;
	long	dd_seek;
} DIR;

/*
 * 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 an 8
 * byte boundary with null bytes.  All names are guaranteed null terminated.
 * The maximum length of a name in a directory is MAXNAMLEN.
 *
 * Explicit padding between the last member of the header (d_namlen) and
 * d_name avoids ABI padding at the end of dirent on LP64 architectures.
 * There is code depending on d_name being last.
 */

struct dirent {
	ino_t      d_fileno;		/* file number of entry */
	off_t      d_off;		/* directory offset of entry */
	__uint16_t d_reclen;		/* length of this record */
	__uint8_t  d_type;		/* file type, see below */
	__uint16_t d_namlen;		/* length of string in d_name */
	char	d_name[NAME_MAX + 1];	/* name must be no longer than this */
};

#if __BSD_VISIBLE
#define	MAXNAMLEN	NAME_MAX
#endif

/*
 * XXX this is probably illegal in the __XSI_VISIBLE case, but brings us closer
 * to the specification.
 */
#define	d_ino		d_fileno	/* backward and XSI compatibility */

#define	__dirfd(dp)	((dp)->dd_fd)

#if __BSD_VISIBLE

/*
 * 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 /* __BSD_VISIBLE */

#endif /* !_SYS_DIRENT_H_ */