usr/src/lib/libbc/libc/stdio/common/rew.c

   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 }