xref: /titanic_41/usr/src/lib/libbc/libc/stdio/common/rew.c (revision 70025d765b044c6d8594bb965a2247a61e991a99)
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 /*      Copyright (c) 1984 AT&T */
23 /*        All Rights Reserved   */
24 
25 #pragma ident	"%Z%%M%	%I%	%E% SMI"  /* from S5R2 1.2 */
26 
27 /*LINTLIBRARY*/
28 #include <stdio.h>
29 
30 extern int fflush();
31 extern long lseek();
32 
33 void
34 rewind(iop)
35 register FILE *iop;
36 {
37 	(void) fflush(iop);
38 	(void) lseek(fileno(iop), 0L, 0);
39 	iop->_cnt = 0;
40 	iop->_ptr = iop->_base;
41 	iop->_flag &= ~(_IOERR | _IOEOF);
42 	if(iop->_flag & _IORW)
43 		iop->_flag &= ~(_IOREAD | _IOWRT);
44 }
45