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 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include "lint.h" 33 #include "file64.h" 34 #include "mtlib.h" 35 #include <sys/types.h> 36 #include <stdio.h> 37 #include <unistd.h> 38 #include <synch.h> 39 #include <thread.h> 40 #include "stdiom.h" 41 #include "libc.h" 42 43 44 void 45 rewind(FILE *iop) 46 { 47 rmutex_t *lk; 48 49 FLOCKFILE(lk, iop); 50 _rewind_unlocked(iop); 51 FUNLOCKFILE(lk); 52 } 53 54 void 55 _rewind_unlocked(FILE *iop) 56 { 57 (void) _fflush_u(iop); 58 (void) lseek64(FILENO(iop), 0, SEEK_SET); 59 iop->_cnt = 0; 60 iop->_ptr = iop->_base; 61 iop->_flag &= ~(_IOERR | _IOEOF); 62 if (iop->_flag & _IORW) 63 iop->_flag &= ~(_IOREAD | _IOWRT); 64 } 65