114 lines
3.5 KiB
C
114 lines
3.5 KiB
C
/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Implementation of fflush() helper routine.
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*
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****************************************************************************/
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#include "variety.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include "fileacc.h"
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#include "rtdata.h"
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#include "seterrno.h"
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#include "qwrite.h"
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#include "lseek.h"
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#include "flush.h"
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#if defined( __NETWARE__ ) && defined( _THIN_LIB )
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/* Take flush from LibC */
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_WCRTLINK int __flush( FILE *fp )
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{
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return( fflush( fp ) );
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}
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#else
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_WCRTLINK int __flush( FILE *fp )
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{
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int len;
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long offset;
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int ret;
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char *ptr;
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unsigned amount;
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ret = 0;
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_AccessFile( fp );
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if( fp->_flag & _DIRTY ) {
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fp->_flag &= ~_DIRTY;
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if( (fp->_flag & _WRITE) && (_FP_BASE(fp) != NULL) ) {
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ptr = _FP_BASE(fp);
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amount = fp->_cnt;
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while( amount != 0 && ret == 0 ) {
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len = __qwrite( fileno( fp ), ptr, amount ); /* 02-aug-90 */
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if( len == -1 ) {
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fp->_flag |= _SFERR;
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ret = EOF;
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}
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#ifndef __UNIX__
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else if( len == 0 ) {
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__set_errno( ENOSPC ); /* 12-nov-88 */
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fp->_flag |= _SFERR;
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ret = EOF;
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}
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#endif
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ptr += len;
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amount -= len;
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}
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}
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} else if( _FP_BASE(fp) != NULL ) { /* not dirty */
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/* fseek( fp, ftell(fp), SEEK_SET ); */
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fp->_flag &= ~_EOF;
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if( !(fp->_flag & _ISTTY) ) {
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offset = fp->_cnt;
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if( offset != 0 ) { /* 10-aug-89 JD */
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offset = __lseek( fileno( fp ), -offset, SEEK_CUR );
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}
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if( offset == -1 ) {
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fp->_flag |= _SFERR;
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ret = EOF;
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}
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}
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}
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fp->_ptr = _FP_BASE(fp); /* reset ptr to start of buffer */
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fp->_cnt = 0;
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#if !defined( __NETWARE__ ) && !defined( __OSI__ )
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if( ret == 0 && (_FP_EXTFLAGS(fp) & _COMMIT) ) {
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if( fsync( fileno( fp ) ) == -1 ) {
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ret = EOF;
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}
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}
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#endif
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_ReleaseFile( fp );
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return( ret );
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}
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#endif
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