1/*
2 * Copyright (c) 1983, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Copyright (c) 2000
6 * 	Daniel Eischen.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * $FreeBSD: src/lib/libc/gen/telldir.h,v 1.3 2008/05/05 14:05:23 kib Exp $
33 */
34
35#ifndef _TELLDIR_H_
36#define	_TELLDIR_H_
37
38#include <sys/queue.h>
39
40/*
41 * One of these structures is malloced to describe the current directory
42 * position each time telldir is called. It records the current magic
43 * cookie returned by getdirentries and the offset within the buffer
44 * associated with that return value.
45 */
46struct ddloc {
47	LIST_ENTRY(ddloc) loc_lqe; /* entry in list */
48	long	loc_index;	/* key associated with structure */
49#if __DARWIN_64_BIT_INO_T
50	__darwin_off_t	loc_seek;	/* returned by lseek */
51#else /* !__DARWIN_64_BIT_INO_T */
52	long	loc_seek;	/* magic cookie returned by getdirentries */
53#endif /* __DARWIN_64_BIT_INO_T */
54	long	loc_loc;	/* offset of entry in buffer */
55};
56
57/*
58 * One of these structures is malloced for each DIR to record telldir
59 * positions.
60 */
61struct _telldir {
62	LIST_HEAD(, ddloc) td_locq; /* list of locations */
63	long	td_loccnt;	/* index of entry for sequential readdir's */
64#if __DARWIN_64_BIT_INO_T
65	__darwin_off_t seekoff;	/* 64-bit seek offset */
66#endif /* __DARWIN_64_BIT_INO_T */
67};
68
69#if __DARWIN_64_BIT_INO_T
70size_t		__getdirentries64(int fd, void *buf, size_t bufsize, __darwin_off_t *basep);
71#endif /* __DARWIN_64_BIT_INO_T */
72struct dirent	*_readdir_unlocked(DIR *, int) __DARWIN_INODE64(_readdir_unlocked);
73void 		_reclaim_telldir(DIR *);
74void 		_seekdir(DIR *, long) __DARWIN_ALIAS_I(_seekdir);
75long		telldir(DIR *) __DARWIN_ALIAS_I(telldir);
76
77#endif
78