xref: /freebsd/lib/libc/gen/gen-private.h (revision d6b92ffa)
1 /*-
2  * Copyright (c) 1989, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the University nor the names of its contributors
14  *    may be used to endorse or promote products derived from this software
15  *    without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * $FreeBSD$
30  */
31 
32 #ifndef _GEN_PRIVATE_H_
33 #define	_GEN_PRIVATE_H_
34 
35 struct _telldir;		/* see telldir.h */
36 struct pthread_mutex;
37 
38 /*
39  * Structure describing an open directory.
40  *
41  * NOTE. Change structure layout with care, at least dd_fd field has to
42  * remain unchanged to guarantee backward compatibility.
43  */
44 struct _dirdesc {
45 	int	dd_fd;		/* file descriptor associated with directory */
46 	long	dd_loc;		/* offset in current buffer */
47 	long	dd_size;	/* amount of data returned by getdirentries */
48 	char	*dd_buf;	/* data buffer */
49 	int	dd_len;		/* size of data buffer */
50 	off_t	dd_seek;	/* magic cookie returned by getdirentries */
51 	int	dd_flags;	/* flags for readdir */
52 	struct pthread_mutex	*dd_lock;	/* lock */
53 	struct _telldir *dd_td;	/* telldir position recording */
54 	void	*dd_compat_de;	/* compat dirent */
55 };
56 
57 #define	_dirfd(dirp)	((dirp)->dd_fd)
58 
59 struct dirent;
60 int __readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result);
61 
62 #endif /* !_GEN_PRIVATE_H_ */
63