/*	$OpenBSD: dirent.h,v 1.24 2011/07/18 17:29:49 matthew Exp $	*/
/*	$NetBSD: dirent.h,v 1.9 1995/03/26 20:13:37 jtc Exp $	*/

/*-
 * 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	8.2 (Berkeley) 7/28/94
 */

#ifndef _DIRENT_H_
#define _DIRENT_H_

#include <sys/cdefs.h>

/*
 * POSIX doesn't mandate this, but X/Open XPG 4.2 does.
 */
#if __BSD_VISIBLE || __XPG_VISIBLE >= 420
#include <sys/types.h>
#endif

/*
 * The kernel defines the format of directory entries returned by 
 * the getdirentries(2) system call.
 */
#include <sys/dirent.h>

#if __BSD_VISIBLE || __XPG_VISIBLE
#define	d_ino		d_fileno	/* backward compatibility */
#endif

#if __BSD_VISIBLE || __XPG_VISIBLE > 600
#define	dirfd(dirp)	((dirp)->dd_fd)
#endif

#if __BSD_VISIBLE

/* definitions for library routines operating on directories. */
#define	DIRBLKSIZ	1024

struct _telldir;
/* structure describing an open directory. */
typedef struct _dirdesc {
	int	dd_fd;		/* file descriptor associated with directory */
	long	dd_loc;		/* offset in current buffer */
	long	dd_size;	/* amount of data returned by getdirentries */
	char	*dd_buf;	/* data buffer */
	int	dd_len;		/* size of data buffer */
	off_t	dd_seek;	/* magic cookie returned by getdirentries */
	off_t	dd_rewind;	/* magic cookie for rewinding */
	int	dd_unused;	/* was flags for readdir */
	struct _telldir *dd_td; /* telldir position recording */
	void	*dd_lock;	/* mutex to protect struct */
} DIR;

#ifndef NULL
#ifdef 	__GNUG__
#define	NULL	__null
#elif defined(__cplusplus)
#define	NULL	0L
#else
#define	NULL	((void *)0)
#endif /* __GNUG__ */
#endif /* !NULL */

#else /* !__BSD_VISIBLE */

typedef void *	DIR;

#endif /* !__BSD_VISIBLE */

#ifndef _KERNEL
__BEGIN_DECLS
DIR *opendir(const char *);
#if __POSIX_VISIBLE >= 200809
DIR *fdopendir(int);
#endif
struct dirent *readdir(DIR *);
void rewinddir(DIR *);
int closedir(DIR *);
#if __BSD_VISIBLE
int getdirentries(int, char *, int, off_t *)
		__attribute__ ((__bounded__(__string__,2,3)));
#endif /* __BSD_VISIBLE */
#if __XPG_VISIBLE
long telldir(DIR *);
void seekdir(DIR *, long);
#endif
#if __POSIX_VISIBLE >= 199506 || __XPG_VISIBLE >= 500
int readdir_r(DIR *, struct dirent *, struct dirent **);
#endif
#if __BSD_VISIBLE || __POSIX_VISIBLE >= 200809
int scandir(const char *, struct dirent ***,
    int (*)(struct dirent *), int (*)(const void *, const void *));
int alphasort(const void *, const void *);
#endif
__END_DECLS

#endif /* !_KERNEL */

#endif /* !_DIRENT_H_ */
