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harbour-core/src/rtl/fslink.c
vszakats 9687850865 2013-03-16 02:10 UTC+0100 Viktor Szakats (harbour syenar.net) 
* (all files)
    * stripped svn header
    * minor cleanups
    ; use following command to find out the history of files:
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2013-03-16 02:11:42 +01:00

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/*
* Harbour Project source code:
* hb_fsLink*(), hb_FLink*() functions
*
* Copyright 2010 Viktor Szakats (harbour syenar.net)
* www - http://harbour-project.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; see the file COPYING.txt. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
*
* As a special exception, the Harbour Project gives permission for
* additional uses of the text contained in its release of Harbour.
*
* The exception is that, if you link the Harbour libraries with other
* files to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public License.
* Your use of that executable is in no way restricted on account of
* linking the Harbour library code into it.
*
* This exception does not however invalidate any other reasons why
* the executable file might be covered by the GNU General Public License.
*
* This exception applies only to the code released by the Harbour
* Project under the name Harbour. If you copy code from other
* Harbour Project or Free Software Foundation releases into a copy of
* Harbour, as the General Public License permits, the exception does
* not apply to the code that you add in this way. To avoid misleading
* anyone as to the status of such modified files, you must delete
* this exception notice from them.
*
* If you write modifications of your own for Harbour, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
*/
#include "hbapi.h"
#include "hbapifs.h"
#include "hbvm.h"
#if defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
#include <windows.h>
#if ! defined( INVALID_FILE_ATTRIBUTES )
#define INVALID_FILE_ATTRIBUTES ( ( DWORD ) -1 )
#endif
#include "hbwinuni.h"
#elif defined( HB_OS_UNIX )
#include <unistd.h>
#endif
HB_BOOL hb_fsLink( const char * pszExisting, const char * pszNewFile )
{
HB_BOOL fResult;
if( pszExisting && pszNewFile )
{
hb_vmUnlock();
#if defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
{
typedef BOOL ( WINAPI * _HB_CREATEHARDLINK )( LPCTSTR, LPCTSTR, LPSECURITY_ATTRIBUTES );
static _HB_CREATEHARDLINK s_pCreateHardLink = NULL;
if( ! s_pCreateHardLink )
s_pCreateHardLink =
( _HB_CREATEHARDLINK )
GetProcAddress( GetModuleHandle( TEXT( "kernel32.dll" ) ),
HB_WINAPI_FUNCTION_NAME( "CreateHardLink" ) );
if( s_pCreateHardLink )
{
LPCTSTR lpFileName, lpExistingFileName;
LPTSTR lpFileNameFree, lpExistingFileNameFree;
lpFileName = HB_FSNAMECONV( pszNewFile, &lpFileNameFree );
lpExistingFileName = HB_FSNAMECONV( pszExisting, &lpExistingFileNameFree );
fResult = s_pCreateHardLink( lpFileName, lpExistingFileName, NULL ) != 0;
hb_fsSetIOError( fResult, 0 );
hb_fsSetFError( hb_fsError() );
if( lpFileNameFree )
hb_xfree( lpFileNameFree );
if( lpExistingFileNameFree )
hb_xfree( lpExistingFileNameFree );
}
else
{
hb_fsSetFError( 1 );
fResult = HB_FALSE;
}
}
#elif defined( HB_OS_UNIX )
{
char * pszExistingFree;
char * pszNewFileFree;
pszExisting = hb_fsNameConv( pszExisting, &pszExistingFree );
pszNewFile = hb_fsNameConv( pszNewFile, &pszNewFileFree );
fResult = ( link( pszExisting, pszNewFile ) == 0 );
hb_fsSetIOError( fResult, 0 );
hb_fsSetFError( hb_fsError() );
if( pszExistingFree )
hb_xfree( pszExistingFree );
if( pszNewFileFree )
hb_xfree( pszNewFileFree );
}
#else
{
hb_fsSetFError( 1 );
fResult = HB_FALSE;
}
#endif
hb_vmLock();
}
else
{
hb_fsSetFError( 2 );
fResult = HB_FALSE;
}
return fResult;
}
HB_BOOL hb_fsLinkSym( const char * pszTarget, const char * pszNewFile )
{
HB_BOOL fResult;
if( pszTarget && pszNewFile )
{
hb_vmUnlock();
#if defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
{
typedef BOOL ( WINAPI * _HB_CREATESYMBOLICLINK )( LPCTSTR, LPCTSTR, DWORD );
static _HB_CREATESYMBOLICLINK s_pCreateSymbolicLink = NULL;
#ifndef SYMBOLIC_LINK_FLAG_DIRECTORY
#define SYMBOLIC_LINK_FLAG_DIRECTORY 0x1
#endif
if( ! s_pCreateSymbolicLink )
s_pCreateSymbolicLink =
( _HB_CREATESYMBOLICLINK )
GetProcAddress( GetModuleHandle( TEXT( "kernel32.dll" ) ),
HB_WINAPI_FUNCTION_NAME( "CreateSymbolicLink" ) );
if( s_pCreateSymbolicLink )
{
LPCTSTR lpSymlinkFileName, lpTargetFileName;
LPTSTR lpSymlinkFileNameFree, lpTargetFileNameFree;
DWORD dwAttr;
HB_BOOL fDir;
lpSymlinkFileName = HB_FSNAMECONV( pszNewFile, &lpSymlinkFileNameFree );
lpTargetFileName = HB_FSNAMECONV( pszTarget, &lpTargetFileNameFree );
dwAttr = GetFileAttributes( lpTargetFileName );
fDir = ( dwAttr != INVALID_FILE_ATTRIBUTES ) &&
( dwAttr & FILE_ATTRIBUTE_DIRECTORY );
fResult = s_pCreateSymbolicLink( lpSymlinkFileName, lpTargetFileName, fDir ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0 ) != 0;
hb_fsSetIOError( fResult, 0 );
hb_fsSetFError( hb_fsError() );
if( lpSymlinkFileNameFree )
hb_xfree( lpSymlinkFileNameFree );
if( lpTargetFileNameFree )
hb_xfree( lpTargetFileNameFree );
}
else
{
hb_fsSetFError( 1 );
fResult = HB_FALSE;
}
}
#elif defined( HB_OS_UNIX )
{
char * pszTargetFree;
char * pszNewFileFree;
pszTarget = hb_fsNameConv( pszTarget, &pszTargetFree );
pszNewFile = hb_fsNameConv( pszNewFile, &pszNewFileFree );
fResult = ( symlink( pszTarget, pszNewFile ) == 0 );
hb_fsSetIOError( fResult, 0 );
hb_fsSetFError( hb_fsError() );
if( pszTargetFree )
hb_xfree( pszTargetFree );
if( pszNewFileFree )
hb_xfree( pszNewFileFree );
}
#else
{
hb_fsSetFError( 1 );
fResult = HB_FALSE;
}
#endif
hb_vmLock();
}
else
{
hb_fsSetFError( 2 );
fResult = HB_FALSE;
}
return fResult;
}
/* NOTE: Caller must free the pointer, if not NULL */
char * hb_fsLinkRead( const char * pszFile )
{
char * pszLink = NULL;
if( pszFile )
{
hb_vmUnlock();
#if defined( HB_OS_WIN ) && ! defined( HB_OS_WIN_CE )
{
typedef DWORD ( WINAPI * _HB_GETFINALPATHNAMEBYHANDLE )( HANDLE, LPTSTR, DWORD, DWORD );
static _HB_GETFINALPATHNAMEBYHANDLE s_pGetFinalPathNameByHandle = NULL;
#ifndef VOLUME_NAME_DOS
#define VOLUME_NAME_DOS 0x0
#endif
#ifndef VOLUME_NAME_GUID
#define VOLUME_NAME_GUID 0x1
#endif
#ifndef VOLUME_NAME_NT
#define VOLUME_NAME_NT 0x2
#endif
#ifndef VOLUME_NAME_NONE
#define VOLUME_NAME_NONE 0x4
#endif
#ifndef FILE_NAME_NORMALIZED
#define FILE_NAME_NORMALIZED 0x0
#endif
#ifndef FILE_NAME_OPENED
#define FILE_NAME_OPENED 0x8
#endif
if( ! s_pGetFinalPathNameByHandle )
s_pGetFinalPathNameByHandle =
( _HB_GETFINALPATHNAMEBYHANDLE )
GetProcAddress( GetModuleHandle( TEXT( "kernel32.dll" ) ),
HB_WINAPI_FUNCTION_NAME( "GetFinalPathNameByHandle" ) );
if( s_pGetFinalPathNameByHandle )
{
LPCTSTR lpFileName;
LPTSTR lpFileNameFree;
HANDLE hFile;
DWORD dwAttr;
HB_BOOL fDir;
lpFileName = HB_FSNAMECONV( pszFile, &lpFileNameFree );
dwAttr = GetFileAttributes( lpFileName );
fDir = ( dwAttr != INVALID_FILE_ATTRIBUTES ) &&
( dwAttr & FILE_ATTRIBUTE_DIRECTORY );
hFile = CreateFile( lpFileName,
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
fDir ? ( FILE_ATTRIBUTE_DIRECTORY | FILE_FLAG_BACKUP_SEMANTICS ) : FILE_ATTRIBUTE_NORMAL,
NULL );
if( hFile == INVALID_HANDLE_VALUE )
{
hb_fsSetIOError( HB_FALSE, 0 );
hb_fsSetFError( hb_fsError() );
}
else
{
DWORD size;
TCHAR lpLink[ HB_PATH_MAX ];
size = s_pGetFinalPathNameByHandle( hFile, lpLink, HB_PATH_MAX, VOLUME_NAME_DOS );
if( size < HB_PATH_MAX )
{
if( size > 0 )
{
lpLink[ size ] = TEXT( '\0' );
pszLink = HB_OSSTRDUP( lpLink );
}
hb_fsSetIOError( HB_TRUE, 0 );
hb_fsSetFError( hb_fsError() );
}
else
hb_fsSetFError( 1 );
}
if( lpFileNameFree )
hb_xfree( lpFileNameFree );
}
else
hb_fsSetFError( 1 );
}
#elif defined( HB_OS_UNIX )
{
char * pszFileFree;
size_t size;
pszFile = hb_fsNameConv( pszFile, &pszFileFree );
pszLink = ( char * ) hb_xgrab( HB_PATH_MAX + 1 );
size = readlink( pszFile, pszLink, HB_PATH_MAX );
hb_fsSetIOError( size != ( size_t ) -1, 0 );
hb_fsSetFError( hb_fsError() );
if( size == ( size_t ) -1 )
{
hb_xfree( pszLink );
pszLink = NULL;
}
else
{
pszLink[ size ] = '\0';
/* Convert from OS codepage */
pszLink = ( char * ) hb_osDecodeCP( pszLink, NULL, NULL );
}
if( pszFileFree )
hb_xfree( pszFileFree );
}
#else
{
hb_fsSetFError( 1 );
}
#endif
hb_vmLock();
}
else
hb_fsSetFError( 2 );
return pszLink;
}
HB_FUNC( HB_FLINK )
{
const char * pszExisting = hb_parc( 1 ), * pszNewFile = hb_parc( 2 );
if( pszExisting && pszNewFile )
hb_retni( hb_fsLink( pszExisting, pszNewFile ) ? 0 : F_ERROR );
else
{
hb_fsSetFError( 2 );
hb_retni( F_ERROR );
}
}
HB_FUNC( HB_FLINKSYM )
{
const char * pszTarget = hb_parc( 1 ), * pszNewFile = hb_parc( 2 );
if( pszTarget && pszNewFile )
hb_retni( hb_fsLinkSym( pszTarget, pszNewFile ) ? 0 : F_ERROR );
else
{
hb_fsSetFError( 2 );
hb_retni( F_ERROR );
}
}
HB_FUNC( HB_FLINKREAD )
{
const char * pszFile = hb_parc( 1 );
if( pszFile )
hb_retc_buffer( hb_fsLinkRead( pszFile ) );
else
{
hb_fsSetFError( 2 );
hb_retc_null();
}
}
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