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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved	*/
29
30#include "lint.h"
31#include "file64.h"
32#include "mtlib.h"
33#include <sys/types.h>
34#include <stdio.h>
35#include <unistd.h>
36#include <synch.h>
37#include <thread.h>
38#include "stdiom.h"
39#include "libc.h"
40
41
42void
43rewind(FILE *iop)
44{
45	rmutex_t *lk;
46
47	FLOCKFILE(lk, iop);
48	_rewind_unlocked(iop);
49	FUNLOCKFILE(lk);
50}
51
52void
53_rewind_unlocked(FILE *iop)
54{
55	(void) _fflush_u(iop);
56	(void) _xseek64(iop, 0, SEEK_SET);
57	iop->_cnt = 0;
58	iop->_ptr = iop->_base;
59	iop->_flag &= ~(_IOERR | _IOEOF);
60	if (iop->_flag & _IORW)
61		iop->_flag &= ~(_IOREAD | _IOWRT);
62}
63