kolibrios-fun/programs/develop/open watcom/trunk/clib/handleio/setmd.c
Sergey Semyonov (Serge) a73bea0da8 Clib chsize, fstat, setmode.
set_file_size: watcom-specific implementation

git-svn-id: svn://kolibrios.org@727 a494cfbc-eb01-0410-851d-a64ba20cac60
2008-02-10 14:10:44 +00:00

92 lines
3.1 KiB
C

/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
* DESCRIBE IT HERE!
*
****************************************************************************/
#include "variety.h"
#include <stdio.h>
#include <errno.h>
#if defined(__NT__)
// #include <windows.h>
#endif
#include <unistd.h>
#include "fcntl.h"
#include "dos.h"
#include "dosfunc.h"
#include "fileacc.h"
#include "rtcheck.h"
#include "rtdata.h"
#include "iomode.h"
#include "seterrno.h"
_WCRTLINK int setmode( int handle, int mode )
{
unsigned iomode_flags;
unsigned old_mode;
__stream_link *link;
FILE *fp;
__handle_check( handle, -1 );
iomode_flags = __GetIOMode( handle );
if( iomode_flags == 0 ) {
__set_errno( EBADF );
return( -1 );
}
old_mode = (iomode_flags & _BINARY) ? O_BINARY : O_TEXT;
if( mode != old_mode ) {
if( mode == O_BINARY || mode == O_TEXT ) {
iomode_flags &= ~ _BINARY;
if( mode == O_BINARY ) {
iomode_flags |= _BINARY;
}
__SetIOMode( handle, iomode_flags );
_AccessFileH( handle );
for( link = _RWD_ostream; link != NULL; link = link->next ) {
fp = link->stream;
if( fp->_flag != 0 ) { /* if file is open */
if( fileno( fp ) == handle ) {
fp->_flag &= ~ _BINARY;
if( mode == O_BINARY ) {
fp->_flag |= _BINARY;
}
break;
}
}
}
_ReleaseFileH( handle );
} else {
__set_errno( EINVAL );
old_mode = -1;
}
}
return( old_mode );
}