1/***********************************************************************
2*                                                                      *
3*               This software is part of the ast package               *
4*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
5*                      and is licensed under the                       *
6*                 Eclipse Public License, Version 1.0                  *
7*                    by AT&T Intellectual Property                     *
8*                                                                      *
9*                A copy of the License is available at                 *
10*          http://www.eclipse.org/org/documents/epl-v10.html           *
11*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
12*                                                                      *
13*              Information and Software Systems Research               *
14*                            AT&T Research                             *
15*                           Florham Park NJ                            *
16*                                                                      *
17*                 Glenn Fowler <gsf@research.att.com>                  *
18*                  David Korn <dgk@research.att.com>                   *
19*                   Phong Vo <kpv@research.att.com>                    *
20*                                                                      *
21***********************************************************************/
22#pragma prototyped
23
24/*
25 * seekdir
26 *
27 * seek on directory stream
28 * this is not optimal because there aren't portable
29 * semantics for directory seeks
30 */
31
32#include "dirlib.h"
33
34#if _dir_ok
35
36NoN(seekdir)
37
38#else
39
40void
41seekdir(register DIR* dirp, long loc)
42{
43	off_t	base;		/* file location of block */
44	off_t	offset; 	/* offset within block */
45
46	if (telldir(dirp) != loc)
47	{
48		lseek(dirp->dd_fd, 0L, SEEK_SET);
49		dirp->dd_loc = dirp->dd_size = 0;
50		while (telldir(dirp) != loc)
51			if (!readdir(dirp))
52				break; 	/* "can't happen" */
53	}
54}
55
56#endif
57