xref: /onnv-gate/usr/src/lib/libbc/libc/gen/common/seekdir.c (revision 0:68f95e015346)
1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate  * CDDL HEADER START
3*0Sstevel@tonic-gate  *
4*0Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*0Sstevel@tonic-gate  * with the License.
8*0Sstevel@tonic-gate  *
9*0Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate  * and limitations under the License.
13*0Sstevel@tonic-gate  *
14*0Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate  *
20*0Sstevel@tonic-gate  * CDDL HEADER END
21*0Sstevel@tonic-gate  */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate  * Copyright 1992 Sun Microsystems, Inc.  All rights reserved.
24*0Sstevel@tonic-gate  * Use is subject to license terms.
25*0Sstevel@tonic-gate  */
26*0Sstevel@tonic-gate 
27*0Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
28*0Sstevel@tonic-gate 
29*0Sstevel@tonic-gate #include <sys/param.h>
30*0Sstevel@tonic-gate #include <dirent.h>
31*0Sstevel@tonic-gate 
32*0Sstevel@tonic-gate /*
33*0Sstevel@tonic-gate  * seek to an entry in a directory.
34*0Sstevel@tonic-gate  * Only values returned by "telldir" should be passed to seekdir.
35*0Sstevel@tonic-gate  */
36*0Sstevel@tonic-gate void
seekdir(dirp,tell)37*0Sstevel@tonic-gate seekdir(dirp, tell)
38*0Sstevel@tonic-gate 	register DIR *dirp;
39*0Sstevel@tonic-gate 	register long tell;
40*0Sstevel@tonic-gate {
41*0Sstevel@tonic-gate 	extern long lseek();
42*0Sstevel@tonic-gate 	long curloc;
43*0Sstevel@tonic-gate 
44*0Sstevel@tonic-gate 	curloc = telldir(dirp);
45*0Sstevel@tonic-gate 	if (curloc == tell)
46*0Sstevel@tonic-gate 		return;
47*0Sstevel@tonic-gate         dirp->dd_loc = 0;
48*0Sstevel@tonic-gate         (void) lseek(dirp->dd_fd, tell, 0);
49*0Sstevel@tonic-gate         dirp->dd_size = 0;
50*0Sstevel@tonic-gate         dirp->dd_off = tell;
51*0Sstevel@tonic-gate }
52*0Sstevel@tonic-gate 
53*0Sstevel@tonic-gate #undef	rewinddir
54*0Sstevel@tonic-gate 
55*0Sstevel@tonic-gate void
rewinddir(dirp)56*0Sstevel@tonic-gate rewinddir(dirp)
57*0Sstevel@tonic-gate 	DIR *dirp;
58*0Sstevel@tonic-gate {
59*0Sstevel@tonic-gate 	seekdir(dirp, 0);
60*0Sstevel@tonic-gate }
61