xref: /titanic_52/usr/src/lib/libbc/libc/gen/common/seekdir.c (revision 25c28e83beb90e7c80452a7c818c5e6f73a07dc8)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 1992 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 #include <sys/param.h>
30 #include <dirent.h>
31 
32 /*
33  * seek to an entry in a directory.
34  * Only values returned by "telldir" should be passed to seekdir.
35  */
36 void
37 seekdir(dirp, tell)
38 	register DIR *dirp;
39 	register long tell;
40 {
41 	extern long lseek();
42 	long curloc;
43 
44 	curloc = telldir(dirp);
45 	if (curloc == tell)
46 		return;
47         dirp->dd_loc = 0;
48         (void) lseek(dirp->dd_fd, tell, 0);
49         dirp->dd_size = 0;
50         dirp->dd_off = tell;
51 }
52 
53 #undef	rewinddir
54 
55 void
56 rewinddir(dirp)
57 	DIR *dirp;
58 {
59 	seekdir(dirp, 0);
60 }
61