1/*
2 * Copyright (c) 1983, 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

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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31static char sccsid[] = "@(#)telldir.c 8.1 (Berkeley) 6/4/93";
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD: stable/10/lib/libc/gen/telldir.c 270002 2014-08-14 20:20:21Z jhb $");
35
36#include "namespace.h"
37#include <sys/param.h>
38#include <sys/queue.h>
39#include <dirent.h>
40#include <pthread.h>
41#include <stdlib.h>
42#include <unistd.h>

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96 LIST_FOREACH(lp, &dirp->dd_td->td_locq, loc_lqe) {
97 if (lp->loc_index == loc)
98 break;
99 }
100 if (lp == NULL)
101 return;
102 if (lp->loc_loc == dirp->dd_loc && lp->loc_seek == dirp->dd_seek)
103 return;
104 (void) lseek(dirp->dd_fd, (off_t)lp->loc_seek, SEEK_SET);
105 dirp->dd_seek = lp->loc_seek;
106 dirp->dd_loc = 0;
107 while (dirp->dd_loc < lp->loc_loc) {
108 dp = _readdir_unlocked(dirp, 0);
109 if (dp == NULL)
110 break;
111 }
112}
113
114/*
115 * Reclaim memory for telldir cookies which weren't used.
116 */
117void
118_reclaim_telldir(dirp)
119 DIR *dirp;
120{
121 struct ddloc *lp;
122 struct ddloc *templp;
123
124 lp = LIST_FIRST(&dirp->dd_td->td_locq);
125 while (lp != NULL) {
126 templp = lp;
127 lp = LIST_NEXT(lp, loc_lqe);
128 free(templp);
129 }
130 LIST_INIT(&dirp->dd_td->td_locq);
131}