145 lines
4.3 KiB
C
145 lines
4.3 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: Platform independent fdopen() implementation.
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*
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****************************************************************************/
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#include "variety.h"
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#include "widechar.h"
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#include <stdio.h>
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#include <ctype.h>
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#ifdef __WIDECHAR__
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#include <wctype.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#ifdef __NT__
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#include <windows.h>
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#endif
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#include "iomode.h"
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#include "rtdata.h"
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#include "seterrno.h"
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#include "streamio.h"
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extern int __F_NAME(__open_flags,__wopen_flags)( const CHAR_TYPE *, int * );
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#ifndef __NETWARE__
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static int __iomode( int handle, int amode )
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{
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int flags;
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int __errno;
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#ifdef __UNIX__
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if( (flags = fcntl( handle, F_GETFL )) == -1 ) {
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return( -1 );
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}
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__errno = EOK;
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if( (flags & O_APPEND) && !(amode & _APPEND) ) {
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__errno = EACCES;
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}
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if( (flags & O_ACCMODE) == O_RDONLY ) {
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if( amode & _WRITE ) {
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__errno = EACCES;
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}
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} else if( (flags & O_ACCMODE) == O_WRONLY ) {
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if( amode & _READ ) {
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__errno = EACCES;
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}
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}
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#else
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/* make sure the handle has the same text/binary mode */
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flags = __GetIOMode( handle );
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__errno = 0;
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if( (amode ^ flags) & (_BINARY | _APPEND) ) {
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__errno = EACCES;
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}
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if( ( amode & _READ ) && !(flags & _READ) ) {
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__errno = EACCES;
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}
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if( ( amode & _WRITE ) && !(flags & _WRITE) ) {
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__errno = EACCES;
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}
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#endif
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if( __errno == EACCES ) {
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__set_errno( __errno );
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return( -1 );
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}
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return( 0 );
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}
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#endif
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_WCRTLINK FILE *__F_NAME(fdopen,_wfdopen)( int handle, const CHAR_TYPE *access_mode )
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{
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unsigned flags;
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FILE *fp;
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int extflags;
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if( handle == -1 ) {
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__set_errno( EBADF ); /* 5-dec-90 */
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return( NULL ); /* 19-apr-90 */
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}
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flags = __F_NAME(__open_flags,__wopen_flags)( access_mode, &extflags );
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if( flags == 0 ) return( NULL );
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#ifndef __NETWARE__
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/* make sure the handle has the same text/binary mode */
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if( __iomode( handle, flags ) == -1 ) {
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return( NULL );
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}
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#endif
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fp = __allocfp( handle ); /* JBS 30-aug-91 */
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if( fp ) {
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fp->_flag &= ~(_READ | _WRITE); /* 2-dec-90 */
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fp->_flag |= flags;
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fp->_cnt = 0;
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_FP_BASE(fp) = NULL;
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fp->_bufsize = 0; /* was BUFSIZ JBS 91/05/31 */
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#ifndef __NETWARE__
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_FP_ORIENTATION(fp) = _NOT_ORIENTED; /* initial orientation */
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_FP_EXTFLAGS(fp) = extflags;
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#endif
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#if defined( __NT__ ) || defined( __OS2__ )
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_FP_PIPEDATA(fp).isPipe = 0; /* not a pipe */
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#endif
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fp->_handle = handle; /* BJS 91-07-23 */
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if( __F_NAME(tolower,towlower)( *access_mode ) == 'a' ) {
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fseek( fp, 0, SEEK_END );
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}
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__chktty( fp ); /* JBS 31-may-91 */
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#if !defined( __UNIX__ ) && !defined( __NETWARE__ )
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__SetIOMode( handle, flags );
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#endif
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}
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return( fp );
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}
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