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/*++
Copyright (c) 1990 Microsoft Corporation
Module Name:
vdm.c
Abstract:
This module implements Win32 APIs for VDMs
Author:
Sudeepb Bharati (sudeepb) 04-Sep-1991
Revision History:
--*/
#include "basedll.h"
#include "apcompat.h"
#pragma hdrstop
BOOLAPIENTRYGetBinaryTypeA( IN LPCSTR lpApplicationName, OUT LPDWORD lpBinaryType )
/*++
Routine Description: ANSI version of GetBinaryTypeW. This API returns the binary type of lpApplicationName.
Arguments: lpApplicationName - Full pathname of the binary lpBinaryType - pointer where binary type will be returned.
Return Value: TRUE - if SUCCESS; lpBinaryType has following SCS_64BIT_BINARY - Win64 Binary SCS_32BIT_BINARY - Win32 Binary SCS_DOS_BINARY - DOS Binary SCS_WOW_BINARY - Windows 3.X Binary SCS_PIF_BINARY - PIF file SCS_POSIX_BINARY - POSIX Binary SCS_OS216_BINARY - OS/2 Binary FALSE - if file not found or of unknown type. More info with GetLastError--*/{ NTSTATUS Status; PUNICODE_STRING CommandLine; ANSI_STRING AnsiString; UNICODE_STRING DynamicCommandLine; BOOLEAN bReturn = FALSE;
CommandLine = &NtCurrentTeb()->StaticUnicodeString; RtlInitAnsiString(&AnsiString,lpApplicationName); if ( (ULONG)AnsiString.Length<<1 < (ULONG)NtCurrentTeb()->StaticUnicodeString.MaximumLength ) { DynamicCommandLine.Buffer = NULL; Status = RtlAnsiStringToUnicodeString(CommandLine,&AnsiString,FALSE); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } } else { Status = RtlAnsiStringToUnicodeString(&DynamicCommandLine,&AnsiString,TRUE); if ( !NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); return FALSE; } }
bReturn = (BOOLEAN)GetBinaryTypeW( DynamicCommandLine.Buffer ? DynamicCommandLine.Buffer : CommandLine->Buffer, lpBinaryType);
RtlFreeUnicodeString(&DynamicCommandLine);
return((BOOL)bReturn);
}
BOOLWINAPIGetBinaryTypeW( IN LPCWSTR lpApplicationName, OUT LPDWORD lpBinaryType )
/*++
Routine Description: Unicode version. This API returns the binary type of lpApplicationName.
Arguments: lpApplicationName - Full pathname of the binary lpBinaryType - pointer where binary type will be returned.
Return Value: TRUE - if SUCCESS; lpBinaryType has following SCS_64BIT_BINARY - Win64 Binary SCS_32BIT_BINARY - Win32 Binary SCS_DOS_BINARY - DOS Binary SCS_WOW_BINARY - Windows 3.X Binary SCS_PIF_BINARY - PIF file SCS_POSIX_BINARY - POSIX Binary SCS_OS216_BINARY - OS/2 Binary FALSE - if file not found or of unknown type. More info with GetLastError--*/
{ NTSTATUS Status; UNICODE_STRING PathName; RTL_RELATIVE_NAME RelativeName; BOOLEAN TranslationStatus; OBJECT_ATTRIBUTES Obja; PVOID FreeBuffer = NULL; HANDLE FileHandle, SectionHandle=NULL; IO_STATUS_BLOCK IoStatusBlock; LONG fBinaryType = SCS_THIS_PLATFORM_BINARY; BOOLEAN bReturn = FALSE; SECTION_IMAGE_INFORMATION ImageInformation;
try { //
// Translate to an NT name.
//
TranslationStatus = RtlDosPathNameToNtPathName_U( // DynamicCommandLine.Buffer ? DynamicCommandLine.Buffer : CommandLine->Buffer,
lpApplicationName, &PathName, NULL, &RelativeName );
if ( !TranslationStatus ) { BaseSetLastNTError(STATUS_OBJECT_NAME_INVALID); goto GBTtryexit; }
FreeBuffer = PathName.Buffer;
if ( RelativeName.RelativeName.Length ) { PathName = *(PUNICODE_STRING)&RelativeName.RelativeName; } else { RelativeName.ContainingDirectory = NULL; }
InitializeObjectAttributes( &Obja, &PathName, OBJ_CASE_INSENSITIVE, RelativeName.ContainingDirectory, NULL );
//
// Open the file for execute access
//
Status = NtOpenFile( &FileHandle, SYNCHRONIZE | FILE_EXECUTE, &Obja, &IoStatusBlock, FILE_SHARE_READ | FILE_SHARE_DELETE, FILE_SYNCHRONOUS_IO_NONALERT | FILE_NON_DIRECTORY_FILE ); if (!NT_SUCCESS(Status) ) { BaseSetLastNTError(Status); goto GBTtryexit; }
//
// Create a section object backed by the file
//
Status = NtCreateSection( &SectionHandle, SECTION_ALL_ACCESS, NULL, NULL, PAGE_EXECUTE, SEC_IMAGE, FileHandle ); NtClose(FileHandle);
if (!NT_SUCCESS(Status) ) {
SectionHandle = NULL;
switch (Status) { case STATUS_INVALID_IMAGE_NE_FORMAT:#if defined(i386) && defined(OS2_SUPPORT_ENABLED)
fBinaryType = SCS_OS216_BINARY; break;#endif
case STATUS_INVALID_IMAGE_PROTECT: fBinaryType = SCS_DOS_BINARY; break;
case STATUS_INVALID_IMAGE_WIN_16: fBinaryType = SCS_WOW_BINARY; break;
case STATUS_INVALID_IMAGE_NOT_MZ: fBinaryType = BaseIsDosApplication(&PathName, Status); if (!fBinaryType){ BaseSetLastNTError(Status); goto GBTtryexit; } fBinaryType = (fBinaryType == BINARY_TYPE_DOS_PIF) ? SCS_PIF_BINARY : SCS_DOS_BINARY; break;
case STATUS_INVALID_IMAGE_WIN_32: fBinaryType = SCS_32BIT_BINARY; break;
case STATUS_INVALID_IMAGE_WIN_64: fBinaryType = SCS_64BIT_BINARY; break;
default: BaseSetLastNTError(Status); goto GBTtryexit; } } else { //
// Query the section
//
Status = NtQuerySection( SectionHandle, SectionImageInformation, &ImageInformation, sizeof( ImageInformation ), NULL );
if (!NT_SUCCESS( Status )) { BaseSetLastNTError(Status); goto GBTtryexit; }
if (ImageInformation.ImageCharacteristics & IMAGE_FILE_DLL) { SetLastError(ERROR_BAD_EXE_FORMAT); goto GBTtryexit; }
if (ImageInformation.Machine != RtlImageNtHeader(NtCurrentPeb()->ImageBaseAddress)->FileHeader.Machine) {
#ifdef MIPS
if ( ImageInformation.Machine == IMAGE_FILE_MACHINE_R3000 || ImageInformation.Machine == IMAGE_FILE_MACHINE_R4000 ) { ; } else { SetLastError(ERROR_BAD_EXE_FORMAT); goto GBTtryexit; }#else
switch ( ImageInformation.Machine ) { case IMAGE_FILE_MACHINE_I386: fBinaryType = SCS_32BIT_BINARY; break;
#if defined(BUILD_WOW6432)
//
// GetBinaryType (64-bit image) from an application running on win64
// will fall to here since the 64-bit kernel allows creation of 32-bit/64-bit
// image sections.
//
case IMAGE_FILE_MACHINE_IA64: case IMAGE_FILE_MACHINE_AMD64: fBinaryType = SCS_64BIT_BINARY; break;#endif
default: SetLastError(ERROR_BAD_EXE_FORMAT); goto GBTtryexit; }#endif // MIPS
} else if ( ImageInformation.SubSystemType != IMAGE_SUBSYSTEM_WINDOWS_GUI && ImageInformation.SubSystemType != IMAGE_SUBSYSTEM_WINDOWS_CUI ) {
if ( ImageInformation.SubSystemType == IMAGE_SUBSYSTEM_POSIX_CUI ) { fBinaryType = SCS_POSIX_BINARY; } }
}
*lpBinaryType = fBinaryType;
bReturn = TRUE;
GBTtryexit:; } finally {
if (SectionHandle) NtClose(SectionHandle);
if (FreeBuffer) RtlFreeHeap(RtlProcessHeap(), 0,FreeBuffer); } return bReturn;}
VOIDAPIENTRYVDMOperationStarted( BOOL IsWowCaller )
/*++
Routine Description: This routine is used by MVDM to tell base that it has hooked ctrl-c handler with console. If the cmd window is killed before VDM could hook ctrl-c, then we wont get a chance to cleanup our data structures. The absence of this call tells base that it has to clean up the resources next time a call is made to create a VDM.
Arguments: IsWowCaller - TRUE if the caller is WOWVDM
Return Value:
None--*/
{ BaseUpdateVDMEntry(UPDATE_VDM_HOOKED_CTRLC, NULL, 0, IsWowCaller); return;}
BOOLAPIENTRYGetNextVDMCommand( PVDMINFO lpVDMInfo )
/*++
Routine Description: This routine is used by MVDM to get a new command to execute. The VDM is blocked untill a DOS/WOW binary is encountered.
Arguments: lpVDMInfo - pointer to VDMINFO where new DOS command and other enviornment information is returned.
if lpVDMInfo is NULL, then the caller is asking whether its the first VDM in the system.
Return Value:
TRUE - The operation was successful. lpVDMInfo is filled in.
FALSE/NULL - The operation failed.
--*/
{
NTSTATUS Status; BASE_API_MSG m; PBASE_GET_NEXT_VDM_COMMAND_MSG a = &m.u.GetNextVDMCommand; PBASE_EXIT_VDM_MSG c = &m.u.ExitVDM; PBASE_IS_FIRST_VDM_MSG d = &m.u.IsFirstVDM; PBASE_SET_REENTER_COUNT_MSG e = &m.u.SetReenterCount; PCSR_CAPTURE_HEADER CaptureBuffer; ULONG Len,nPointers; USHORT VDMStateSave;
// Special case to query the first VDM In the system.
if(lpVDMInfo == NULL){ Status = CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER(BASESRV_SERVERDLL_INDEX, BasepIsFirstVDM ), sizeof( *d ) );
if (NT_SUCCESS(Status)) { return(d->FirstVDM); } else { BaseSetLastNTError(Status); return FALSE; } }
// Special case to increment/decrement the re-enterancy count
if (lpVDMInfo->VDMState == INCREMENT_REENTER_COUNT || lpVDMInfo->VDMState == DECREMENT_REENTER_COUNT) {
e->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle; e->fIncDec = lpVDMInfo->VDMState; Status = CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepSetReenterCount ), sizeof( *e ) ); if (NT_SUCCESS(Status)) { return TRUE; } else { BaseSetLastNTError(Status); return FALSE; } }
VDMStateSave = lpVDMInfo->VDMState;
// console handle is always passed on in this case
// wow is differentiated by a parameter a->VDMState
// a->VDMState & ASKING_FOR_WOW_BINARY indicates wow
a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
if (lpVDMInfo->VDMState & ASKING_FOR_PIF) { a->iTask = lpVDMInfo->iTask; } else { a->iTask = 0; }
a->AppLen = lpVDMInfo->AppLen; a->PifLen = lpVDMInfo->PifLen; a->CmdLen = lpVDMInfo->CmdSize; a->EnvLen = lpVDMInfo->EnviornmentSize; a->ExitCode = lpVDMInfo->ErrorCode; a->VDMState = VDMStateSave; a->WaitObjectForVDM = 0; a->DesktopLen = lpVDMInfo->DesktopLen; a->TitleLen = lpVDMInfo->TitleLen; a->ReservedLen = lpVDMInfo->ReservedLen; a->CurDirectoryLen = lpVDMInfo->CurDirectoryLen;
// Find the total space for capture buffer
// startup info
Len = ROUND_UP(sizeof(STARTUPINFOA),4); nPointers = 1;
if (lpVDMInfo->CmdSize) { Len += ROUND_UP(a->CmdLen,4); nPointers++; }
if (lpVDMInfo->AppLen) { Len +=ROUND_UP(a->AppLen,4); nPointers++; }
if (lpVDMInfo->PifLen) { Len +=ROUND_UP(a->PifLen,4); nPointers++; }
if (lpVDMInfo->Enviornment) { nPointers++; Len+= (lpVDMInfo->EnviornmentSize) ? ROUND_UP(lpVDMInfo->EnviornmentSize, 4) : 4; }
if (lpVDMInfo->CurDirectoryLen == 0) a->CurDirectory = NULL; else{ Len += ROUND_UP(lpVDMInfo->CurDirectoryLen,4); nPointers++; }
if (lpVDMInfo->DesktopLen == 0) a->Desktop = NULL; else { Len += ROUND_UP(lpVDMInfo->DesktopLen,4); nPointers++; }
if (lpVDMInfo->TitleLen == 0) a->Title = NULL; else { Len += ROUND_UP(lpVDMInfo->TitleLen,4); nPointers++; }
if (lpVDMInfo->ReservedLen == 0) a->Reserved = NULL; else { Len += ROUND_UP(lpVDMInfo->ReservedLen,4); nPointers++; }
CaptureBuffer = CsrAllocateCaptureBuffer(nPointers, Len); if (CaptureBuffer == NULL) { BaseSetLastNTError( STATUS_NO_MEMORY ); return FALSE; }
if (lpVDMInfo->CmdLine) { CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->CmdSize, (PVOID *)&a->CmdLine ); } else { a->CmdLine = NULL; }
if (lpVDMInfo->AppLen) { CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->AppLen, (PVOID *)&a->AppName ); } else { a->AppName = NULL; }
if (lpVDMInfo->PifLen) { CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->PifLen, (PVOID *)&a->PifFile ); } else { a->PifFile = NULL; }
if (lpVDMInfo->EnviornmentSize) { CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->EnviornmentSize, (PVOID *)&a->Env ); } else { a->Env = NULL; }
if (lpVDMInfo->CurDirectoryLen) CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->CurDirectoryLen, (PVOID *)&a->CurDirectory ); else a->CurDirectory = NULL;
CsrAllocateMessagePointer( CaptureBuffer, sizeof(STARTUPINFOA), (PVOID *)&a->StartupInfo );
if (lpVDMInfo->DesktopLen) CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->DesktopLen, (PVOID *)&a->Desktop ); else a->Desktop = NULL;
if (lpVDMInfo->TitleLen) CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->TitleLen, (PVOID *)&a->Title ); else a->Title = NULL;
if (lpVDMInfo->ReservedLen) CsrAllocateMessagePointer( CaptureBuffer, lpVDMInfo->ReservedLen, (PVOID *)&a->Reserved ); else a->Reserved = NULL;
retry: Status = CsrClientCallServer( (PCSR_API_MSG)&m, CaptureBuffer, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepGetNextVDMCommand ), sizeof( *a ) );
if (a->WaitObjectForVDM) { Status = NtWaitForSingleObject(a->WaitObjectForVDM,FALSE,NULL); if (Status != STATUS_SUCCESS){ BaseSetLastNTError(Status); return FALSE; } else { a->VDMState |= ASKING_FOR_SECOND_TIME; a->ExitCode = 0; goto retry; } }
if (NT_SUCCESS(Status)) { Status = (NTSTATUS)m.ReturnValue; }
if (!NT_SUCCESS( Status )) { if (Status == STATUS_INVALID_PARAMETER) { //This means one of the buffer size is less than required.
lpVDMInfo->CmdSize = a->CmdLen; lpVDMInfo->AppLen = a->AppLen; lpVDMInfo->PifLen = a->PifLen; lpVDMInfo->EnviornmentSize = a->EnvLen; lpVDMInfo->CurDirectoryLen = a->CurDirectoryLen; lpVDMInfo->DesktopLen = a->DesktopLen; lpVDMInfo->TitleLen = a->TitleLen; lpVDMInfo->ReservedLen = a->ReservedLen; } else { lpVDMInfo->CmdSize = 0; lpVDMInfo->AppLen = 0; lpVDMInfo->PifLen = 0; lpVDMInfo->EnviornmentSize = 0; lpVDMInfo->CurDirectoryLen = 0; lpVDMInfo->DesktopLen = 0; lpVDMInfo->TitleLen = 0; lpVDMInfo->ReservedLen = 0; } CsrFreeCaptureBuffer( CaptureBuffer ); BaseSetLastNTError(Status); return FALSE; }
try {
if (lpVDMInfo->CmdSize) RtlMoveMemory(lpVDMInfo->CmdLine, a->CmdLine, a->CmdLen);
if (lpVDMInfo->AppLen) RtlMoveMemory(lpVDMInfo->AppName, a->AppName, a->AppLen);
if (lpVDMInfo->PifLen) RtlMoveMemory(lpVDMInfo->PifFile, a->PifFile, a->PifLen);
if (lpVDMInfo->Enviornment) RtlMoveMemory(lpVDMInfo->Enviornment, a->Env, a->EnvLen);
if (lpVDMInfo->CurDirectoryLen) RtlMoveMemory(lpVDMInfo->CurDirectory, a->CurDirectory, a->CurDirectoryLen);
if (a->VDMState & STARTUP_INFO_RETURNED) RtlMoveMemory(&lpVDMInfo->StartupInfo, a->StartupInfo, sizeof(STARTUPINFOA));
if (lpVDMInfo->DesktopLen){ RtlMoveMemory(lpVDMInfo->Desktop, a->Desktop, a->DesktopLen); lpVDMInfo->StartupInfo.lpDesktop = lpVDMInfo->Desktop; }
if (lpVDMInfo->TitleLen){ RtlMoveMemory(lpVDMInfo->Title, a->Title, a->TitleLen); lpVDMInfo->StartupInfo.lpTitle = lpVDMInfo->Title; }
if (lpVDMInfo->ReservedLen){ RtlMoveMemory(lpVDMInfo->Reserved, a->Reserved, a->ReservedLen); lpVDMInfo->StartupInfo.lpReserved = lpVDMInfo->Reserved; }
lpVDMInfo->CmdSize = a->CmdLen; lpVDMInfo->AppLen = a->AppLen; lpVDMInfo->PifLen = a->PifLen; lpVDMInfo->EnviornmentSize = a->EnvLen; if (a->VDMState & STARTUP_INFO_RETURNED) lpVDMInfo->VDMState = STARTUP_INFO_RETURNED; else lpVDMInfo->VDMState = 0; lpVDMInfo->CurDrive = a->CurrentDrive; lpVDMInfo->StdIn = a->StdIn; lpVDMInfo->StdOut = a->StdOut; lpVDMInfo->StdErr = a->StdErr; lpVDMInfo->iTask = a->iTask; lpVDMInfo->CodePage = a->CodePage; lpVDMInfo->CurDirectoryLen = a->CurDirectoryLen; lpVDMInfo->DesktopLen = a->DesktopLen; lpVDMInfo->TitleLen = a->TitleLen; lpVDMInfo->ReservedLen = a->ReservedLen; lpVDMInfo->dwCreationFlags = a->dwCreationFlags; lpVDMInfo->fComingFromBat = a->fComingFromBat;
CsrFreeCaptureBuffer( CaptureBuffer ); return TRUE; } except ( EXCEPTION_EXECUTE_HANDLER ) { BaseSetLastNTError(GetExceptionCode()); CsrFreeCaptureBuffer( CaptureBuffer ); return FALSE; }}
VOIDAPIENTRYExitVDM( BOOL IsWowCaller, ULONG iWowTask )
/*++
Routine Description: This routine is used by MVDM to exit.
Arguments: IsWowCaller - TRUE if the caller is WOWVDM. FALSE if the caller is DOSVDM This parameter is obsolete as basesrv knows about the kind of vdm that is calling us
iWowTask - if IsWowCaller == FALSE then Dont Care - if IsWowCaller == TRUE && iWowTask != -1 kill iWowTask task - if IsWowCaller == TRUE && iWowTask == -1 kill all wow task
Return Value: None
--*/
{
NTSTATUS Status; BASE_API_MSG m; PBASE_EXIT_VDM_MSG c = &m.u.ExitVDM;
c->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
if (IsWowCaller) { c->iWowTask = iWowTask; } else { c->iWowTask = 0; }
// this parameter means
c->WaitObjectForVDM =0;
Status = CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepExitVDM ), sizeof( *c ) ); if (NT_SUCCESS(Status) && c->WaitObjectForVDM) { NtClose (c->WaitObjectForVDM); }
return;}
/*++
Routine Description: Set new VDM current directories
Arguments: cchCurDir - length of buffer in bytes lpszCurDir - buffer to return the current director of NTVDM
Return Value: TRUE if function succeed FALSE if function failed, GetLastError() has the error code--*/
BOOLAPIENTRYSetVDMCurrentDirectories( IN ULONG cchCurDirs, IN LPSTR lpszzCurDirs ){ NTSTATUS Status; PCSR_CAPTURE_HEADER CaptureBuffer; BASE_API_MSG m; PBASE_GET_SET_VDM_CUR_DIRS_MSG a = &m.u.GetSetVDMCurDirs;
a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle; // caller must have a valid console(WOW will fail)
if (a->ConsoleHandle == (HANDLE) -1) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return FALSE; } if (cchCurDirs && lpszzCurDirs) { // get capture buffer, one pointer in the message
CaptureBuffer = CsrAllocateCaptureBuffer(1, cchCurDirs); if (CaptureBuffer == NULL) { BaseSetLastNTError( STATUS_NO_MEMORY ); return FALSE; }
CsrAllocateMessagePointer( CaptureBuffer, cchCurDirs, (PVOID *)&a->lpszzCurDirs );
a->cchCurDirs = cchCurDirs; try { RtlMoveMemory(a->lpszzCurDirs, lpszzCurDirs, cchCurDirs); } except (EXCEPTION_EXECUTE_HANDLER) { BaseSetLastNTError(GetExceptionCode()); CsrFreeCaptureBuffer(CaptureBuffer); return FALSE; } Status = CsrClientCallServer( (PCSR_API_MSG)&m, CaptureBuffer, CSR_MAKE_API_NUMBER(BASESRV_SERVERDLL_INDEX, BasepSetVDMCurDirs ), sizeof( *a ) ); CsrFreeCaptureBuffer(CaptureBuffer);
if (!NT_SUCCESS(Status) || !NT_SUCCESS((NTSTATUS)m.ReturnValue)) { BaseSetLastNTError(Status); return FALSE; } } return TRUE;}
/*++
Routine Description: To return current directory of NTVDM. This allows the parent process(CMD.EXE in most cases) to keep track the current directory after each VDM execution. NOTE: this function doesn't apply to wow
Arguments: cchCurDir - length of buffer in bytes lpszCurDir - buffer to return the current director of NTVDM
Note: We don't require the process id to the running VDM because current directories are global to every VDMs under a single NTVDM control -- each console handle has its own current directoriesReturn Value: ULONG - (1). number of bytes written to the given buffer if succeed (2). lentgh of the current directory including NULL if the provided buffer is not large enough (3). 0 then GetLastError() has the error code--*/
ULONGAPIENTRYGetVDMCurrentDirectories( IN ULONG cchCurDirs, IN LPSTR lpszzCurDirs ){ NTSTATUS Status; PCSR_CAPTURE_HEADER CaptureBuffer; BASE_API_MSG m; PBASE_GET_SET_VDM_CUR_DIRS_MSG a = &m.u.GetSetVDMCurDirs;
a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle; if (a->ConsoleHandle == (HANDLE) -1) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return 0L; } if (cchCurDirs && lpszzCurDirs) { CaptureBuffer = CsrAllocateCaptureBuffer(1, cchCurDirs); if (CaptureBuffer == NULL) { BaseSetLastNTError( STATUS_NO_MEMORY ); return FALSE; }
CsrAllocateMessagePointer( CaptureBuffer, cchCurDirs, (PVOID *)&a->lpszzCurDirs );
a->cchCurDirs = cchCurDirs; } else { a->cchCurDirs = 0; a->lpszzCurDirs = NULL; CaptureBuffer = NULL; }
m.ReturnValue = 0xffffffff;
Status = CsrClientCallServer( (PCSR_API_MSG)&m, CaptureBuffer, CSR_MAKE_API_NUMBER(BASESRV_SERVERDLL_INDEX, BasepGetVDMCurDirs ), sizeof( *a ) );
if (m.ReturnValue == 0xffffffff) { a->cchCurDirs = 0; }
if (NT_SUCCESS(Status)) { Status = m.ReturnValue; }
if (NT_SUCCESS(Status)) {
try { RtlMoveMemory(lpszzCurDirs, a->lpszzCurDirs, a->cchCurDirs); } except(EXCEPTION_EXECUTE_HANDLER) { Status = GetExceptionCode(); a->cchCurDirs = 0; } } else { BaseSetLastNTError(Status); }
if (CaptureBuffer) { CsrFreeCaptureBuffer(CaptureBuffer); }
return a->cchCurDirs;}
VOIDAPIENTRYCmdBatNotification( IN ULONG fBeginEnd )
/*++
Routine Description: This API lets base know about .bat processing from cmd. This is required by VDM, so that it can decided correctly when to put command.com prompt on TSRs. If the command came from .bat file then VDM should'nt put its prompt. This is important for ventura publisher and civilization apps.
Arguments: fBeginEnd - CMD_BAT_OPERATION_STARTING -> .BAT processing is starting CMD_BAT_OPERATION_TERMINATING -> .BAT processing is ending
Return Value: None--*/
{#if defined(BUILD_WOW6432)
// 32-bit cmd.exe calls this in WOW64, but there is no VDM support, so
// no need for a WOW64 thunk for it.
UNREFERENCED_PARAMETER(fBeginEnd);
#else
BASE_API_MSG m; PBASE_BAT_NOTIFICATION_MSG a = &m.u.BatNotification;
a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
if (a->ConsoleHandle == (HANDLE) -1) return;
a->fBeginEnd = fBeginEnd;
CsrClientCallServer((PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER(BASESRV_SERVERDLL_INDEX, BasepBatNotification ), sizeof( *a ) );#endif
return;}
NTSTATUSAPIENTRYRegisterWowExec( IN HANDLE hwndWowExec )
/*++
Routine Description: This API gives basesrv the window handle for the shared WowExec so it can send WM_WOWEXECSTARTAPP messages to WowExec. This saves having a thread in WOW dedicated to GetNextVDMCommand.
Arguments: hwndWowExec - Win32 window handle for WowExec in shared WOW VDM. Separate WOW VDMs don't register their WowExec handle because they never get commands from base. NULL is passed to de-register any given wowexec
Return Value: If hwndWowExec != NULL then returns success if wow had been registered successfully if hwndWowExec == NULL then returns success if no tasks are pending to be executed--*/
{ BASE_API_MSG m; PBASE_REGISTER_WOWEXEC_MSG a = &m.u.RegisterWowExec; NTSTATUS Status;
a->hwndWowExec = hwndWowExec; a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
Status = CsrClientCallServer((PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER(BASESRV_SERVERDLL_INDEX, BasepRegisterWowExec ), sizeof( *a ) ); return Status;}
/*++
Routine Description: This routine is used to close standard IO handles before returning to the caller
Arguments: pVDMInfo - VDM Info record containing stdio handles
Return Value: None
--*/VOIDBaseCloseStandardHandle( IN PVDMINFO pVDMInfo ){ if (pVDMInfo->StdIn) NtClose (pVDMInfo->StdIn);
if (pVDMInfo->StdOut) NtClose (pVDMInfo->StdOut);
if (pVDMInfo->StdErr) NtClose (pVDMInfo->StdErr);
pVDMInfo->StdIn = 0; pVDMInfo->StdOut = 0; pVDMInfo->StdErr = 0;}
#ifdef OLD_CFG_BASED
BOOLBaseGetVDMKeyword( PCHAR KeywordLine, PCONFIG_KEYWORD *pKeywordLine, PCHAR KeywordSize, PULONG VdmSize ){ NTSTATUS Status; PCONFIG_FILE ConfigFile; PCONFIG_SECTION Section; STRING SectionName, KeywordName; PCONFIG_KEYWORD pKeywordSize;
//
// Retrieve the VDM configuration information from the config file
//
Status = RtlOpenConfigFile( NULL, &ConfigFile ); if (!NT_SUCCESS( Status )) { return FALSE; }
//
// Find WOW section of config file
//
RtlInitString( &SectionName, "WOW" ); Section = RtlLocateSectionConfigFile( ConfigFile, &SectionName ); if (Section == NULL) { RtlCloseConfigFile( ConfigFile ); return FALSE; }
//
// Get command line
//
RtlInitString( &KeywordName, KeywordLine ); *pKeywordLine = RtlLocateKeywordConfigFile( Section, &KeywordName ); if (*pKeywordLine == NULL) { RtlCloseConfigFile( ConfigFile ); return FALSE; } //
// Get Vdm size
//
RtlInitString( &KeywordName, KeywordSize ); pKeywordSize = RtlLocateKeywordConfigFile( Section, &KeywordName ); if (pKeywordSize == NULL) { *VdmSize = 1024L * 1024L * 16L; } else { Status = RtlCharToInteger( pKeywordSize->Value.Buffer, 0, VdmSize ); if (!NT_SUCCESS( Status )) { *VdmSize = 1024L * 1024L * 16L; } else { *VdmSize *= 1024L * 1024L; // convert to MB
} } return TRUE;}
#endif
BOOLBaseGetVDMKeyword( LPWSTR KeywordLine, LPSTR KeywordLineValue, LPDWORD KeywordLineSize, LPWSTR KeywordSize, LPDWORD VdmSize ){ NTSTATUS NtStatus; UNICODE_STRING UnicodeString,UnicodeTemp; UNICODE_STRING KeyName; ANSI_STRING AnsiString; LPWSTR UnicodeBuffer,Temp; OBJECT_ATTRIBUTES ObjectAttributes; HANDLE hKey = NULL; PKEY_VALUE_FULL_INFORMATION pKeyValueInformation;
//
// Allocate Work buffer
//
UnicodeBuffer = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), FULL_INFO_BUFFER_SIZE); if (!UnicodeBuffer) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); return(FALSE); }
// Open the WOW key
RtlInitUnicodeString (&KeyName, WOW_ROOT);
InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE, NULL, NULL );
NtStatus = NtOpenKey(&hKey, KEY_READ, &ObjectAttributes);
if (NtStatus == STATUS_OBJECT_NAME_NOT_FOUND) { BaseSetLastNTError(NtStatus); return FALSE; }
if (!GetVDMConfigValue(hKey,KeywordLine,UnicodeBuffer)) { NtClose (hKey); RtlFreeHeap(RtlProcessHeap(), 0, UnicodeBuffer); return(FALSE); }
//
// Now convert back to ANSI for the caller after doing all the substitution
//
pKeyValueInformation = (PVOID)UnicodeBuffer; Temp = (LPWSTR)((PBYTE) pKeyValueInformation + pKeyValueInformation->DataOffset); RtlInitUnicodeString( &UnicodeString, Temp ); UnicodeTemp.Buffer = (LPWSTR)KeywordLineValue; UnicodeTemp.Length = 0; UnicodeTemp.MaximumLength = MAX_VDM_CFG_LINE; NtStatus = RtlExpandEnvironmentStrings_U (NULL,&UnicodeString, &UnicodeTemp, NULL); if (!NT_SUCCESS( NtStatus )){ NtClose (hKey); RtlFreeHeap(RtlProcessHeap(), 0, UnicodeBuffer); return FALSE; } wcscpy(UnicodeString.Buffer,UnicodeTemp.Buffer); UnicodeString.Length = UnicodeTemp.Length;
//
// Set up an ANSI_STRING that points to the user's buffer
//
AnsiString.MaximumLength = (USHORT) *KeywordLineSize; AnsiString.Length = 0; AnsiString.Buffer = KeywordLineValue;
RtlUnicodeStringToAnsiString(&AnsiString, &UnicodeString, FALSE);
*KeywordLineSize = AnsiString.Length;
// Always set the VDMSize to 16Mb. (This is for reservation only)
// Actual commit is done by SAS_INIT.
//
// jarbats
// for meow subsystem we need more than 16mb reserved for
// loading win32 pe exes
// VDMSize is set to 32Mb.
*VdmSize = 32L; //default value is 32
*VdmSize *= 1024L * 1024L; // convert From MB
NtClose (hKey); RtlFreeHeap(RtlProcessHeap(), 0, UnicodeBuffer); return(TRUE);
}
BOOLGetVDMConfigValue( HANDLE hKey, LPWSTR Keyword, LPWSTR UnicodeBuffer ){ NTSTATUS NtStatus; UNICODE_STRING ValueName; PKEY_VALUE_FULL_INFORMATION pKeyValueInformation = (PVOID) UnicodeBuffer; ULONG ValueLength;
RtlInitUnicodeString(&ValueName, Keyword); NtStatus = NtQueryValueKey(hKey, &ValueName, KeyValueFullInformation, pKeyValueInformation, FULL_INFO_BUFFER_SIZE, &ValueLength);
if (NT_SUCCESS(NtStatus)) return TRUE; else { BaseSetLastNTError (NtStatus); return FALSE; }}
NTSTATUSBaseCheckVDMp( IN ULONG BinaryType, IN PCWCH lpApplicationName, IN PCWCH lpCommandLine, IN PCWCH lpCurrentDirectory, IN ANSI_STRING *pAnsiStringEnv, IN PBASE_API_MSG m, IN OUT PULONG iTask, IN DWORD dwCreationFlags, LPSTARTUPINFOW lpStartupInfo )/*++
Routine Description:
This routine calls the windows server to find out if the VDM for the current session is already present. If so, a new process is'nt created instead the DOS binary is dispatched to the existing VDM. Otherwise, a new VDM process is created. This routine also passes the app name and command line to the server in DOS int21/0ah style which is later passed by the server to the VDM.
Arguments:
BinaryType - DOS/WOW binary lpApplicationName -- pointer to the full path name of the executable. lpCommandLine -- command line lpCurrentDirectory - Current directory lpEnvironment, - Envirinment strings m - pointer to the base api message. iTask - taskid for win16 apps, and no-console dos apps dwCreationFlags - creation flags as passed to createprocess lpStartupInfo =- pointer to startupinfo as passed to createprocess
Return Value:
OEM vs. ANSI: The command line, Application Name, title are converted to OEM strings, suitable for the VDM. All other strings are returned as ANSI.
returns nt status code of the last operation STATUS_ACCESS_DENIED -- Operation failed (desktop access denied) STATUS_SUCCESS -- Operation sucseeded
--*/{
NTSTATUS Status = STATUS_UNSUCCESSFUL; PPEB Peb; PBASE_CHECKVDM_MSG b= (PBASE_CHECKVDM_MSG)&m->u.CheckVDM; PCSR_CAPTURE_HEADER CaptureBuffer; ANSI_STRING AnsiStringCurrentDir,AnsiStringDesktop; ANSI_STRING AnsiStringReserved, AnsiStringPif; OEM_STRING OemStringCmd, OemStringAppName, OemStringTitle; UNICODE_STRING UnicodeString; PCHAR pch, Buffer = NULL; ULONG Len; ULONG bufPointers; LPWSTR wsBuffer; LPWSTR wsAppName; LPWSTR wsPifName; LPWSTR wsCmdLine; LPWSTR wsPif=(PWSTR)".\0p\0i\0f\0\0"; // L".pif"
LPWSTR wsSharedWowPif=L"wowexec.pif"; PWCHAR pwch; BOOLEAN bNewConsole; DWORD dw, dwTotal, Length; WCHAR wchBuffer[MAX_PATH + 1]; ULONG BinarySubType; LPWSTR lpAllocatedReserved = NULL; DWORD HandleFlags;
// does a trivial test of the environment
if (!ARGUMENT_PRESENT(pAnsiStringEnv) || pAnsiStringEnv->Length > MAXIMUM_VDM_ENVIORNMENT) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return STATUS_INVALID_PARAMETER; }
wsCmdLine = wsAppName = NULL; OemStringCmd.Buffer = NULL; OemStringAppName.Buffer = NULL; AnsiStringCurrentDir.Buffer = NULL; AnsiStringDesktop.Buffer = NULL; AnsiStringPif.Buffer = NULL; OemStringTitle.Buffer = NULL; AnsiStringReserved.Buffer = NULL; wsBuffer = NULL; wsPifName = NULL;
BinarySubType = BinaryType & BINARY_SUBTYPE_MASK; BinaryType = BinaryType & ~BINARY_SUBTYPE_MASK; bNewConsole = !NtCurrentPeb()->ProcessParameters->ConsoleHandle || (dwCreationFlags & CREATE_NEW_CONSOLE);
try {
if (BinaryType == BINARY_TYPE_DOS) {
Peb = NtCurrentPeb(); if (lpStartupInfo && lpStartupInfo->dwFlags & STARTF_USESTDHANDLES) { b->StdIn = lpStartupInfo->hStdInput; b->StdOut = lpStartupInfo->hStdOutput; b->StdErr = lpStartupInfo->hStdError;
} else { b->StdIn = Peb->ProcessParameters->StandardInput; b->StdOut = Peb->ProcessParameters->StandardOutput; b->StdErr = Peb->ProcessParameters->StandardError;
//
// Verify that the standard handles ntvdm process will inherit
// from the calling process are real handles. They are not
// handles if the calling process was created with
// STARTF_USEHOTKEY | STARTF_HASSHELLDATA.
// Note that CreateProcess clears STARTF_USESTANDHANDLES
// if either STARTF_USEHOTKEY or STARTF_HASSHELLDATA is set.
//
if (Peb->ProcessParameters->WindowFlags & (STARTF_USEHOTKEY | STARTF_HASSHELLDATA)) {
if (b->StdIn && !CONSOLE_HANDLE(b->StdIn) && !GetHandleInformation(b->StdIn, &HandleFlags)) b->StdIn = 0; if (b->StdOut && !CONSOLE_HANDLE(b->StdOut) && !GetHandleInformation(b->StdOut, &HandleFlags)) { if (b->StdErr == b->StdOut) b->StdErr = 0; b->StdOut = 0; } if (b->StdErr && b->StdErr != b->StdOut && !CONSOLE_HANDLE(b->StdErr) && !GetHandleInformation(b->StdErr, &HandleFlags)) b->StdErr = 0; } } if (CONSOLE_HANDLE((b->StdIn))) b->StdIn = 0;
if (CONSOLE_HANDLE((b->StdOut))) b->StdOut = 0;
if (CONSOLE_HANDLE((b->StdErr))) b->StdErr = 0; }
if (BinaryType == BINARY_TYPE_SEPWOW) { bNewConsole = TRUE; }
//
// Convert Unicode Application Name to Oem short name
//
// skiping leading white space
while(*lpApplicationName == (WCHAR)' ' || *lpApplicationName == (WCHAR)'\t' ) { lpApplicationName++; }
// space for short AppName
Len = wcslen(lpApplicationName); dwTotal = Len + 1 + MAX_PATH; wsAppName = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG(VDM_TAG), dwTotal * sizeof(WCHAR) ); if (wsAppName == NULL) { Status = STATUS_NO_MEMORY; goto BCVTryExit; }
dw = GetShortPathNameW(lpApplicationName, wsAppName, dwTotal); // If getting the short name is impossible, stop right here.
// We can not execute a 16bits biranry if we can not find
// its appropriate short name alias. Sorry HPFS, Sorry NFS
if (0 == dw || dw > dwTotal) { Status = STATUS_OBJECT_PATH_INVALID; goto BCVTryExit; }
RtlInitUnicodeString(&UnicodeString, wsAppName); Status = RtlUnicodeStringToOemString(&OemStringAppName, &UnicodeString, TRUE ); if (!NT_SUCCESS(Status) ){ goto BCVTryExit; }
//
// Find len of basename excluding extension,
// for CommandTail max len check.
//
dw = OemStringAppName.Length; pch = OemStringAppName.Buffer; Length = 1; // start at one for space between cmdname & cmdtail
while (dw-- && *pch != '.') { if (*pch == '\\') { Length = 1; } else { Length++; } pch++; }
//
// Find the beg of the command tail to pass as the CmdLine
//
Len = wcslen(lpApplicationName);
if (L'"' == lpCommandLine[0]) {
//
// Application name is quoted, skip the quoted text
// to get command tail.
//
pwch = (LPWSTR)&lpCommandLine[1]; while (*pwch && L'"' != *pwch++) { ; }
} else if (Len <= wcslen(lpCommandLine) && 0 == _wcsnicmp(lpApplicationName, lpCommandLine, Len)) {
//
// Application path is also on the command line, skip past
// that to reach the command tail instead of looking for
// the first white space.
//
pwch = (LPWSTR)lpCommandLine + Len;
} else {
//
// We assume first token is exename (argv[0]).
//
pwch = (LPWSTR)lpCommandLine;
// skip leading white characters
while (*pwch != UNICODE_NULL && (*pwch == (WCHAR) ' ' || *pwch == (WCHAR) '\t')) { pwch++; }
// skip first token
if (*pwch == (WCHAR) '\"') { // quotes as delimiter
pwch++; while (*pwch && *pwch++ != '\"') { ; } } else { // white space as delimiter
while (*pwch && *pwch != ' ' && *pwch != '\t') { pwch++; } } }
//
// pwch points past the application name, now skip any trailing
// whitespace.
//
while (*pwch && (L' ' == *pwch || L'\t' == *pwch)) { pwch++; }
wsCmdLine = pwch; dw = wcslen(wsCmdLine);
// convert to oem
UnicodeString.Length = (USHORT)(dw * sizeof(WCHAR)); UnicodeString.MaximumLength = UnicodeString.Length + sizeof(WCHAR); UnicodeString.Buffer = wsCmdLine; Status = RtlUnicodeStringToOemString( &OemStringCmd, &UnicodeString, TRUE);
if (!NT_SUCCESS(Status) ){ goto BCVTryExit; }
//
// check len of command line for dos compatibility
//
if (OemStringCmd.Length >= MAXIMUM_VDM_COMMAND_LENGTH - Length) { Status = STATUS_INVALID_PARAMETER; goto BCVTryExit; }
//
// Search for matching pif file. Search order is AppName dir,
// followed by win32 default search path. For the shared wow, pif
// is wowexec.pif if it exists.
//
wsBuffer = RtlAllocateHeap(RtlProcessHeap(),MAKE_TAG( VDM_TAG ),MAX_PATH*sizeof(WCHAR)); if (!wsBuffer) { Status = STATUS_NO_MEMORY; goto BCVTryExit; }
wsPifName = RtlAllocateHeap(RtlProcessHeap(),MAKE_TAG( VDM_TAG ),MAX_PATH*sizeof(WCHAR)); if (!wsPifName) { Status = STATUS_NO_MEMORY; goto BCVTryExit; }
if (BinaryType == BINARY_TYPE_WIN16) { wcscpy(wsBuffer, wsSharedWowPif); Len = 0; } else { // start with fully qualified app name
wcscpy(wsBuffer, lpApplicationName);
// strip extension if any
pwch = wcsrchr(wsBuffer, (WCHAR)'.'); // dos application must have an extention
if (pwch == NULL) { Status = STATUS_INVALID_PARAMETER; goto BCVTryExit; } wcscpy(pwch, wsPif); Len = GetFileAttributesW(wsBuffer); if (Len == (DWORD)(-1) || (Len & FILE_ATTRIBUTE_DIRECTORY)) { Len = 0; } else { Len = wcslen(wsBuffer) + 1; wcsncpy(wsPifName, wsBuffer, Len); } }
if (!Len) { // try basename
// find beg of basename
pwch = wcsrchr(wsBuffer, (WCHAR)'\\'); if (!pwch ) { pwch = wcsrchr(wsBuffer, (WCHAR)':'); }
// move basename to beg of wsBuffer
if (pwch++) { while (*pwch != UNICODE_NULL && *pwch != (WCHAR)' ' && *pwch != (WCHAR)'\t' ) { wsBuffer[Len++] = *pwch++; } wsBuffer[Len] = UNICODE_NULL; }
if (Len) { Len = SearchPathW( NULL, wsBuffer, wsPif, // L".pif"
MAX_PATH, wsPifName, NULL ); if (Len >= MAX_PATH) { Status = STATUS_NO_MEMORY; goto BCVTryExit; } } }
if (!Len) *wsPifName = UNICODE_NULL;
if (!ARGUMENT_PRESENT( lpCurrentDirectory )) {
dw = RtlGetCurrentDirectory_U(sizeof (wchBuffer), wchBuffer);
wchBuffer[dw / sizeof(WCHAR)] = UNICODE_NULL; dw = GetShortPathNameW(wchBuffer, wchBuffer, sizeof(wchBuffer) / sizeof(WCHAR) ); if (dw > sizeof(wchBuffer) / sizeof(WCHAR)) goto BCVTryExit;
else if (dw == 0) { RtlInitUnicodeString(&UnicodeString, wchBuffer); dw = UnicodeString.Length / sizeof(WCHAR); } else { UnicodeString.Length = (USHORT)(dw * sizeof(WCHAR)); UnicodeString.Buffer = wchBuffer; UnicodeString.MaximumLength = (USHORT)sizeof(wchBuffer); } // DOS limit of 64 includes the final NULL but not the leading
// drive and slash. So here we should be checking the ansi length
// of current directory + 1 (for NULL) - 3 (for c:\).
if ( dw - 2 <= MAXIMUM_VDM_CURRENT_DIR ) { Status = RtlUnicodeStringToAnsiString( &AnsiStringCurrentDir, &UnicodeString, TRUE ); } else { Status = STATUS_INVALID_PARAMETER; }
if ( !NT_SUCCESS(Status) ) { goto BCVTryExit; } } else {
// first get a full path name
dw = GetFullPathNameW(lpCurrentDirectory, sizeof(wchBuffer) / sizeof(WCHAR), wchBuffer, NULL); if (0 != dw && dw <= sizeof(wchBuffer) / sizeof(WCHAR)) { dw = GetShortPathNameW(wchBuffer, wchBuffer, sizeof(wchBuffer) / sizeof(WCHAR)); } if (dw > sizeof(wchBuffer) / sizeof(WCHAR)) goto BCVTryExit;
if (dw != 0) { UnicodeString.Buffer = wchBuffer; UnicodeString.Length = (USHORT)(dw * sizeof(WCHAR)); UnicodeString.MaximumLength = sizeof(wchBuffer); } else RtlInitUnicodeString(&UnicodeString, lpCurrentDirectory);
Status = RtlUnicodeStringToAnsiString( &AnsiStringCurrentDir, &UnicodeString, TRUE);
if ( !NT_SUCCESS(Status) ){ goto BCVTryExit; }
// DOS limit of 64 includes the final NULL but not the leading
// drive and slash. So here we should be checking the ansi length
// of current directory + 1 (for NULL) - 3 (for c:\).
if((AnsiStringCurrentDir.Length - 2) > MAXIMUM_VDM_CURRENT_DIR) { Status = STATUS_INVALID_PARAMETER; goto BCVTryExit; } }
// NT allows applications to use UNC name as their current directory.
// while NTVDM can't do that. We will end up a weird drive number
// like '\' - 'a') here ????????????????????????????????
//
// Place Current Drive
if(AnsiStringCurrentDir.Buffer[0] <= 'Z') b->CurDrive = AnsiStringCurrentDir.Buffer[0] - 'A'; else b->CurDrive = AnsiStringCurrentDir.Buffer[0] - 'a';
//
// Hotkey info in NT traditionally is specified in the
// startupinfo.lpReserved field, but Win95 added a
// duplicate mechanism. If the Win95 method was used,
// map it to the NT method here so the rest of the
// VDM code only has to deal with one method.
//
// If the caller was specified a hotkey
// in lpReserved as well as using STARTF_USEHOTKEY,
// the STARTF_USEHOTKEY hotkey will take precedence.
//
if (lpStartupInfo && lpStartupInfo->dwFlags & STARTF_USEHOTKEY) {
DWORD cbAlloc = sizeof(WCHAR) * (20 + // "hotkey.4294967295 " (MAXULONG)
(lpStartupInfo->lpReserved // length of prev lpReserved
? wcslen(lpStartupInfo->lpReserved) : 0 ) + 1 // NULL terminator
);
lpAllocatedReserved = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), cbAlloc ); if (lpAllocatedReserved) {
swprintf(lpAllocatedReserved, L"hotkey.%u %s", HandleToUlong(lpStartupInfo->hStdInput), lpStartupInfo->lpReserved ? lpStartupInfo->lpReserved : L"" );
lpStartupInfo->dwFlags &= ~STARTF_USEHOTKEY; lpStartupInfo->hStdInput = 0; lpStartupInfo->lpReserved = lpAllocatedReserved;
}
}
//
// Allocate Capture Buffer
//
//
bufPointers = 2; // CmdLine, AppName
//
// CmdLine for capture buffer, 3 for 0xd,0xa and NULL
//
Len = ROUND_UP((OemStringCmd.Length + 3),4);
// AppName, 1 for NULL
Len += ROUND_UP((OemStringAppName.Length + 1),4);
// Env
if (pAnsiStringEnv->Length) { bufPointers++; Len += ROUND_UP(pAnsiStringEnv->Length, 4); }
// CurrentDir
if (AnsiStringCurrentDir.Length){ bufPointers++; Len += ROUND_UP((AnsiStringCurrentDir.Length +1),4); // 1 for NULL
}
// pif file name, 1 for NULL
if (wsPifName && *wsPifName != UNICODE_NULL) { bufPointers++; RtlInitUnicodeString(&UnicodeString,wsPifName); Status = RtlUnicodeStringToAnsiString(&AnsiStringPif, &UnicodeString, TRUE ); if ( !NT_SUCCESS(Status) ){ goto BCVTryExit; }
Len += ROUND_UP((AnsiStringPif.Length+1),4); }
//
// startupinfo space
//
if (lpStartupInfo) { Len += ROUND_UP(sizeof(STARTUPINFOA),4); bufPointers++; if (lpStartupInfo->lpDesktop) { bufPointers++; RtlInitUnicodeString(&UnicodeString,lpStartupInfo->lpDesktop); Status = RtlUnicodeStringToAnsiString( &AnsiStringDesktop, &UnicodeString, TRUE);
if ( !NT_SUCCESS(Status) ){ goto BCVTryExit; } Len += ROUND_UP((AnsiStringDesktop.Length+1),4); }
if (lpStartupInfo->lpTitle) { bufPointers++; RtlInitUnicodeString(&UnicodeString,lpStartupInfo->lpTitle); Status = RtlUnicodeStringToOemString( &OemStringTitle, &UnicodeString, TRUE);
if ( !NT_SUCCESS(Status) ){ goto BCVTryExit; } Len += ROUND_UP((OemStringTitle.Length+1),4); }
if (lpStartupInfo->lpReserved) { bufPointers++; RtlInitUnicodeString(&UnicodeString,lpStartupInfo->lpReserved); Status = RtlUnicodeStringToAnsiString( &AnsiStringReserved, &UnicodeString, TRUE);
if ( !NT_SUCCESS(Status) ){ goto BCVTryExit; } Len += ROUND_UP((AnsiStringReserved.Length+1),4); } }
// capture message buffer
CaptureBuffer = CsrAllocateCaptureBuffer(bufPointers, Len); if (CaptureBuffer == NULL) { Status = STATUS_NO_MEMORY; goto BCVTryExit; }
// Allocate CmdLine pointer
CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((OemStringCmd.Length + 3),4), (PVOID *)&b->CmdLine );
// Copy Command Line
RtlMoveMemory (b->CmdLine, OemStringCmd.Buffer, OemStringCmd.Length); b->CmdLine[OemStringCmd.Length] = 0xd; b->CmdLine[OemStringCmd.Length+1] = 0xa; b->CmdLine[OemStringCmd.Length+2] = 0; b->CmdLen = (USHORT)(OemStringCmd.Length + 3);
// Allocate AppName pointer
CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((OemStringAppName.Length + 1),4), (PVOID *)&b->AppName );
// Copy AppName
RtlMoveMemory (b->AppName, OemStringAppName.Buffer, OemStringAppName.Length ); b->AppName[OemStringAppName.Length] = 0; b->AppLen = OemStringAppName.Length + 1;
// Allocate PifFile pointer, Copy PifFile name
if(AnsiStringPif.Buffer) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((AnsiStringPif.Length + 1),4), (PVOID *)&b->PifFile );
RtlMoveMemory(b->PifFile, AnsiStringPif.Buffer, AnsiStringPif.Length);
b->PifFile[AnsiStringPif.Length] = 0; b->PifLen = AnsiStringPif.Length + 1;
} else { b->PifLen = 0; b->PifFile = NULL; }
// Allocate Env pointer, Copy Env strings
if(pAnsiStringEnv->Length) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((pAnsiStringEnv->Length),4), (PVOID *)&b->Env );
RtlMoveMemory(b->Env, pAnsiStringEnv->Buffer, pAnsiStringEnv->Length);
b->EnvLen = pAnsiStringEnv->Length;
} else { b->EnvLen = 0; b->Env = NULL; }
if(AnsiStringCurrentDir.Length) { // Allocate Curdir pointer
CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((AnsiStringCurrentDir.Length + 1),4), (PVOID *)&b->CurDirectory ); // copy cur directory
RtlMoveMemory (b->CurDirectory, AnsiStringCurrentDir.Buffer, AnsiStringCurrentDir.Length+1);
b->CurDirectoryLen = AnsiStringCurrentDir.Length+1; } else { b->CurDirectory = NULL; b->CurDirectoryLen = 0; }
// Allocate startupinfo pointer
if (lpStartupInfo) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP(sizeof(STARTUPINFOA),4), (PVOID *)&b->StartupInfo ); // Copy startupinfo
b->StartupInfo->dwX = lpStartupInfo->dwX; b->StartupInfo->dwY = lpStartupInfo->dwY; b->StartupInfo->dwXSize = lpStartupInfo->dwXSize; b->StartupInfo->dwYSize = lpStartupInfo->dwYSize; b->StartupInfo->dwXCountChars= lpStartupInfo->dwXCountChars; b->StartupInfo->dwYCountChars= lpStartupInfo->dwYCountChars; b->StartupInfo->dwFillAttribute=lpStartupInfo->dwFillAttribute; b->StartupInfo->dwFlags = lpStartupInfo->dwFlags; b->StartupInfo->wShowWindow = lpStartupInfo->wShowWindow; b->StartupInfo->cb = sizeof(STARTUPINFOA); } else { b->StartupInfo = NULL; }
// Allocate pointer for Desktop info if needed
if (AnsiStringDesktop.Buffer) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((AnsiStringDesktop.Length + 1),4), (PVOID *)&b->Desktop ); // Copy desktop string
RtlMoveMemory (b->Desktop, AnsiStringDesktop.Buffer, AnsiStringDesktop.Length+1); b->DesktopLen =AnsiStringDesktop.Length+1; } else { b->Desktop = NULL; b->DesktopLen =0; }
// Allocate pointer for Title info if needed
if (OemStringTitle.Buffer) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((OemStringTitle.Length + 1),4), (PVOID *)&b->Title ); // Copy title string
RtlMoveMemory (b->Title, OemStringTitle.Buffer, OemStringTitle.Length+1); b->TitleLen = OemStringTitle.Length+1; } else { b->Title = NULL; b->TitleLen = 0; }
// Allocate pointer for Reserved field if needed
if (AnsiStringReserved.Buffer) { CsrAllocateMessagePointer( CaptureBuffer, ROUND_UP((AnsiStringReserved.Length + 1),4), (PVOID *)&b->Reserved ); // Copy reserved string
RtlMoveMemory (b->Reserved, AnsiStringReserved.Buffer, AnsiStringReserved.Length+1); b->ReservedLen = AnsiStringReserved.Length+1; } else { b->Reserved = NULL; b->ReservedLen = 0; }
// VadimB: this code is of no consequence to our marvelous new
// architecture for tracking shared wows.
// Reason: the checkvdm command is executed within the context of
// a parent process thus at this point ConsoleHandle is of any
// interest only to DOS apps.
if (BinaryType == BINARY_TYPE_WIN16) b->ConsoleHandle = (HANDLE)-1; else if (bNewConsole) b->ConsoleHandle = 0; else b->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
b->VDMState = FALSE; b->BinaryType = BinaryType; b->CodePage = (ULONG) GetConsoleCP (); b->dwCreationFlags = dwCreationFlags;
Status = CsrClientCallServer( (PCSR_API_MSG)m, CaptureBuffer, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepCheckVDM ), sizeof( *b ) );
// if desktop access is denied, then we try again with the
// current default desktop
//
if ((STATUS_ACCESS_DENIED == Status) && (0 == b->DesktopLen)) { CsrFreeCaptureBuffer(CaptureBuffer); goto BCVTryExit; }
CsrFreeCaptureBuffer(CaptureBuffer);
if (!NT_SUCCESS(Status) || !NT_SUCCESS((NTSTATUS)m->ReturnValue)) { Status = (NTSTATUS)m->ReturnValue; goto BCVTryExit; }
// VadimB: This iTask could be :
// (*) If not wow task - then dos task id (items below are not
// relevant for this case)
// (*) Shared wow exists and ready - this is a wow task id
// that is unique across all the shared wows
*iTask = b->iTask; Status = STATUS_SUCCESS;
BCVTryExit:; BaseSetLastNTError(Status); }
finally { if(Buffer != NULL) RtlFreeHeap(RtlProcessHeap(), 0, (PVOID)Buffer);
if(wsBuffer != NULL) RtlFreeHeap(RtlProcessHeap(), 0, (PVOID)wsBuffer);
if(wsPifName != NULL) RtlFreeHeap(RtlProcessHeap(), 0, (PVOID)wsPifName);
if(OemStringCmd.Buffer != NULL) RtlFreeOemString(&OemStringCmd);
if(OemStringAppName.Buffer != NULL) RtlFreeOemString(&OemStringAppName);
if(AnsiStringPif.Buffer != NULL) RtlFreeAnsiString(&AnsiStringPif);
if(AnsiStringCurrentDir.Buffer != NULL) RtlFreeAnsiString(&AnsiStringCurrentDir);
if(AnsiStringDesktop.Buffer != NULL) RtlFreeAnsiString(&AnsiStringDesktop);
if(OemStringTitle.Buffer != NULL) RtlFreeAnsiString(&OemStringTitle);
if(AnsiStringReserved.Buffer != NULL) RtlFreeAnsiString(&AnsiStringReserved);
if (wsAppName != NULL) RtlFreeHeap(RtlProcessHeap(), 0, wsAppName);
if (lpAllocatedReserved != NULL) RtlFreeHeap(RtlProcessHeap(), 0, lpAllocatedReserved);
}
return Status;}
/*
jarbats Some apps send startupinfo with bad desktop name as a result, basecheckvdm will fail with because access to the desktop can't be obtained in that case we attempt again with the parents desktop */
BOOLBaseCheckVDM( IN ULONG BinaryType, IN PCWCH lpApplicationName, IN PCWCH lpCommandLine, IN PCWCH lpCurrentDirectory, IN ANSI_STRING *pAnsiStringEnv, IN PBASE_API_MSG m, IN OUT PULONG iTask, IN DWORD dwCreationFlags, LPSTARTUPINFOW lpStartupInfo ) {
NTSTATUS Status; LPWSTR lpDesktopOld;
Status = BaseCheckVDMp( BinaryType, lpApplicationName, lpCommandLine, lpCurrentDirectory, pAnsiStringEnv, m, iTask, dwCreationFlags, lpStartupInfo );
if ( Status == STATUS_ACCESS_DENIED ) { lpDesktopOld = lpStartupInfo->lpDesktop; lpStartupInfo->lpDesktop = (LPWSTR)((PRTL_USER_PROCESS_PARAMETERS)NtCurrentPeb()-> ProcessParameters)->DesktopInfo.Buffer; Status = BaseCheckVDMp( BinaryType, lpApplicationName, lpCommandLine, lpCurrentDirectory, pAnsiStringEnv, m, iTask, dwCreationFlags, lpStartupInfo );
if (!NT_SUCCESS(Status)) { lpStartupInfo->lpDesktop = lpDesktopOld; } }
return NT_SUCCESS(Status);}
BOOLBaseUpdateVDMEntry( IN ULONG UpdateIndex, IN OUT HANDLE *WaitHandle, IN ULONG IndexInfo, IN ULONG BinaryType ){ NTSTATUS Status; BASE_API_MSG m; PBASE_UPDATE_VDM_ENTRY_MSG c = &m.u.UpdateVDMEntry;
switch (UpdateIndex) { case UPDATE_VDM_UNDO_CREATION: c->iTask = HandleToUlong(*WaitHandle); c->VDMCreationState = (USHORT)IndexInfo; break; case UPDATE_VDM_PROCESS_HANDLE: c->VDMProcessHandle = *WaitHandle; // Actually this is VDM handle
c->iTask = IndexInfo; break; }
// VadimB: this ConsoleHandle is of no consequence to the
// shared wow tracking mechanism
if(BinaryType == BINARY_TYPE_WIN16) c->ConsoleHandle = (HANDLE)-1; else if (c->iTask) c->ConsoleHandle = 0; else c->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle;
c->EntryIndex = (WORD)UpdateIndex; c->BinaryType = BinaryType;
Status = CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepUpdateVDMEntry ), sizeof( *c ) );
if (!NT_SUCCESS(Status) || !NT_SUCCESS((NTSTATUS)m.ReturnValue)) { BaseSetLastNTError((NTSTATUS)m.ReturnValue); return FALSE; }
switch (UpdateIndex) { case UPDATE_VDM_UNDO_CREATION: break; case UPDATE_VDM_PROCESS_HANDLE: *WaitHandle = c->WaitObjectForParent; break; } return TRUE;}
ULONGBaseIsDosApplication( IN PUNICODE_STRING PathName, IN NTSTATUS Status )/*++
Routine Description:
Determines if app is a ".com" or a ".pif" type of app by looking at the extension, and the Status from NtCreateSection for PAGE_EXECUTE.
Arguments:
PathName -- Supplies a pointer to the path string Status -- Status code from CreateSection call bNewConsole -- Pif can exec only from a new console
Return Value:
file is a com\pif dos application SCS_DOS_BINARY - ".com", may also be a .exe extension SCS_PIF_BINARY - ".pif"
0 -- file is not a dos application, may be a .bat or .cmd file
--*/{ UNICODE_STRING String;
// check for .com extension
String.Length = BaseDotComSuffixName.Length; String.Buffer = &(PathName->Buffer[(PathName->Length - String.Length) / sizeof(WCHAR)]);
if (RtlEqualUnicodeString(&String, &BaseDotComSuffixName, TRUE)) return BINARY_TYPE_DOS_COM;
// check for .pif extension
String.Length = BaseDotPifSuffixName.Length; String.Buffer = &(PathName->Buffer[(PathName->Length - String.Length) / sizeof(WCHAR)]);
if (RtlEqualUnicodeString(&String, &BaseDotPifSuffixName, TRUE)) return BINARY_TYPE_DOS_PIF;
// check for .exe extension
String.Length = BaseDotExeSuffixName.Length; String.Buffer = &(PathName->Buffer[(PathName->Length - String.Length) / sizeof(WCHAR)]);
if (RtlEqualUnicodeString(&String, &BaseDotExeSuffixName, TRUE)) return BINARY_TYPE_DOS_EXE;
return 0;}
BOOLBaseGetVdmConfigInfo( IN LPCWSTR CommandLine, IN ULONG DosSeqId, IN ULONG BinaryType, IN PUNICODE_STRING CmdLineString, IN OUT PULONG VdmSize )/*++
Routine Description:
This routine locates the VDM configuration information for Wow vdms in the system configuration file. It also reconstructs the commandline so that we can start the VDM. The new command line is composed from the information in the configuration file + the old command line.
Arguments:
CommandLine -- pointer to a string pointer that is used to pass the command line string
DosSeqId - new console session id. This parameter is also valid for shared wow as it is passed to ntvdm as -i parameter. Another parameter to identify shared wow is passed to ntvdm as '-ws' where 'w' stands for wow app, 's' stands for separate In response to this 's' parameter ntvdm launches a separate wow (one-time shot). By default, ntvdm starts a shared wow.
VdmSize --entry: If set to 1 construct command line for MEOW return: the size in bytes of the VDM to be created
BinaryType - dos, sharedwow, sepwow
Return Value:
TRUE -- VDM configuration information was available FALSE -- VDM configuration information was not available
Notes:
--*/{ NTSTATUS Status; BOOL bRet; DWORD dw; ANSI_STRING AnsiString; LPSTR NewCmdLine=NULL; PCH pSrc, pDst, pch; ULONG Len; char CmdLine[MAX_VDM_CFG_LINE]; BOOL bMeow =(1 == *VdmSize);
CmdLineString->Buffer = NULL;
Len = MAX_VDM_CFG_LINE;
if (BinaryType == BINARY_TYPE_DOS) { bRet = BaseGetVDMKeyword(CMDLINE, CmdLine, &Len, DOSSIZE, VdmSize); } else { bRet = BaseGetVDMKeyword(WOWCMDLINE, CmdLine, &Len, WOWSIZE, VdmSize); }
if (!bRet) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); return FALSE; }
//
// Allocate memory to replace the CommandLine
// extra space is needed for long->short name conversion,
// separate wow, and extension.
//
NewCmdLine = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), MAX_PATH + MAX_VDM_CFG_LINE ); if (!NewCmdLine) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); return FALSE; }
//
// Copy over the cmdline checking for special args
// and locating the beg of wowkernel
//
pSrc = CmdLine; pDst = NewCmdLine;
//
// first token must be "\\%SystemRoot%\\system32\\ntvdm", search
// for the tail of the pathname to traverse possible long file name
// safely.
//
pch = strstr(pSrc, "\\system32\\ntvdm"); if (!pch) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return FALSE; }
// mov pch to trailing space in "ntvdm "
while (*pch && *pch != ' ') { pch++; }
//
// copy first token (ntvdm path name), surrounded by quotes for
// possible long file name
//
*pDst++ = '\"'; while (pSrc < pch) { *pDst++ = *pSrc++; } *pDst++ = '\"';
//
// Add -f arg, so ntvdm knows it wasn't invoked directly
//
*pDst++ = ' '; *pDst++ = '-'; *pDst++ = 'f';
//
// Add DosSeqId for new console
//
if (DosSeqId) { sprintf(pDst, " -i%lx", DosSeqId); pDst += strlen(pDst); }
//
// Copy over everything up to the " -a " (exclusive)
// CAVEAT: we assume -a is last
//
pch = strstr(pSrc, " -a "); if (pch) { while (pSrc < pch) { *pDst++ = *pSrc++; } } else { while (*pSrc) { *pDst++ = *pSrc++; } }
*pDst = '\0';
//
// for wow -a is mandatory to specify win16 krnl, and is expected
// to be the last cmdline parameter
//
if (BinaryType != BINARY_TYPE_DOS) { // shared wow, sep wow
PCH pWowKernel;
if (!*pSrc) { BaseSetLastNTError(STATUS_INVALID_PARAMETER); return FALSE; }
//
// Add -w to tell ntvdm its wow (mandatory)
//
*pDst++ = ' '; *pDst++ = '-'; *pDst++ = 'w';
//
// identify that this wow is a separate wow by -ws
//
if (BINARY_TYPE_SEPWOW == BinaryType) { *pDst++ = 's'; }
//
// identify that this wow is a MEOW process by -wsm
//
if (bMeow) { *pDst++ = 'm'; }
//
// copy over the " -a WowKernelPathname" argument
// and locate beg of WowKernelPathname in destination
//
pWowKernel = pDst; while (*pSrc) { *pDst++ = *pSrc++; } pWowKernel += 4; // find beg of WowKernelPathaname
while (*pWowKernel == ' ') { pWowKernel++; }
//
// If meow process, change krnl386 to mekr386
//
if (bMeow) { pch=strrchr(pWowKernel,'\\'); strcpy(pch+1,"mekr386.exe"); } else {
//
// Append file extension to destination
//
strcpy(pDst, ".exe"); }
//
// convert wowkernel to short name
//
Len = MAX_PATH + MAX_VDM_CFG_LINE - (ULONG)((ULONG_PTR)pWowKernel - (ULONG_PTR)NewCmdLine) -1; dw = GetShortPathNameA(pWowKernel, pWowKernel, Len); if (dw > Len) { RtlFreeHeap(RtlProcessHeap(), 0, NewCmdLine); return FALSE; } }
RtlInitAnsiString(&AnsiString, NewCmdLine); Status = RtlAnsiStringToUnicodeString(CmdLineString, &AnsiString, TRUE); if (!NT_SUCCESS(Status)) { BaseSetLastNTError(Status); RtlFreeHeap(RtlProcessHeap(), 0, NewCmdLine); CmdLineString->Buffer = NULL; return FALSE; }
RtlFreeHeap(RtlProcessHeap(), 0, NewCmdLine); return TRUE;}
BOOLBaseCheckForVDM( IN HANDLE hProcess, OUT LPDWORD lpExitCode ){ NTSTATUS Status; EVENT_BASIC_INFORMATION ebi; BASE_API_MSG m; PBASE_GET_VDM_EXIT_CODE_MSG a = &m.u.GetVDMExitCode;
Status = NtQueryEvent ( hProcess, EventBasicInformation, &ebi, sizeof(ebi), NULL);
if(!NT_SUCCESS(Status)) return FALSE;
a->ConsoleHandle = NtCurrentPeb()->ProcessParameters->ConsoleHandle; a->hParent = hProcess; Status = CsrClientCallServer( (PCSR_API_MSG)&m, NULL, CSR_MAKE_API_NUMBER( BASESRV_SERVERDLL_INDEX, BasepGetVDMExitCode), sizeof( *a ) );
if (!NT_SUCCESS(Status)) { return FALSE; }
*lpExitCode = (DWORD)a->ExitCode;
return TRUE;}
DWORDAPIENTRYGetShortPathNameA( IN LPCSTR lpszLongPath, IN LPSTR lpShortPath, IN DWORD cchBuffer ){ UNICODE_STRING UString, UStringRet; ANSI_STRING AString; NTSTATUS Status; WCHAR TempPathW[MAX_PATH]; LPWSTR lpShortPathW = NULL; DWORD ReturnValue; DWORD ReturnValueW;
if (lpszLongPath == NULL) { SetLastError(ERROR_INVALID_PARAMETER); return 0; } // We have to initialize it before the "try" statement
AString.Buffer = NULL; UString.Buffer = NULL;
ReturnValue = 0; ReturnValueW = 0;
try { if (!Basep8BitStringToDynamicUnicodeString(&UString, lpszLongPath )) { goto gspTryExit; }
// we have to get the real converted path in order to find out
// the required length. An UNICODE char does not necessarily convert
// to one ANSI char(A DBCS is basically TWO ANSI char!!!!!).
// First, we use the buffer allocated from the stack. If the buffer
// is too small, we then allocate it from heap.
// A check of (lpShortPathW && TempPathW != lpShortPathW) will reveal
// if we have allocated a buffer from heap and need to release it.
lpShortPathW = TempPathW; ReturnValueW = GetShortPathNameW(UString.Buffer, lpShortPathW, sizeof(TempPathW) / sizeof(WCHAR)); if (ReturnValueW >= sizeof(TempPathW) / sizeof(WCHAR)) { // the stack-based buffer is too small. Allocate a new buffer
// from heap.
lpShortPathW = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), ReturnValueW * sizeof(WCHAR) ); if (lpShortPathW) { ReturnValueW = GetShortPathNameW(UString.Buffer, lpShortPathW, ReturnValueW); } else { ReturnValueW = 0; SetLastError(ERROR_NOT_ENOUGH_MEMORY); } }
if (ReturnValueW) { // we are here because we have something interesting left to do.
// Convert the UNICODE path name to ANSI(or OEM).
UString.MaximumLength = (USHORT)((ReturnValueW + 1) * sizeof(WCHAR)); UStringRet.Buffer = lpShortPathW; UStringRet.Length = (USHORT)(ReturnValueW * sizeof(WCHAR)); Status = BasepUnicodeStringTo8BitString(&AString, &UStringRet, TRUE );
if (!NT_SUCCESS(Status)) { BaseSetLastNTError(Status); ReturnValue=0; goto gspTryExit; } // now AString.Length contains the size of the converted path
// name. If the caller provides enough buffer, copy the
// path name.
ReturnValue = AString.Length; if (ARGUMENT_PRESENT(lpShortPath) && cchBuffer > ReturnValue) { RtlMoveMemory(lpShortPath, AString.Buffer, ReturnValue); // terminate the string with NULL char
lpShortPath[ReturnValue] = '\0'; } else { // either the caller does not provide a buffer or
// the provided buffer is too small return the required size,
// including the terminated null char
ReturnValue++; } }gspTryExit:; }
finally { if (UString.Buffer) RtlFreeUnicodeString(&UString); if (AString.Buffer) RtlFreeAnsiString(&AString); if (lpShortPathW && lpShortPathW != TempPathW) RtlFreeHeap(RtlProcessHeap(), 0, lpShortPathW); } return ReturnValue;}/****
GetShortPathName
Description: This function converts the given path name to its short form if needed. The conversion may not be necessary and in that case, this function simply copies down the given name to the return buffer. The caller can have the return buffer set equal to the given path name address.
Parameters: lpszLongPath - Points to a NULL terminated string. lpszShortPath - Buffer address to return the short name. cchBuffer - Buffer size in char of lpszShortPath.
Return Value If the GetShortPathName function succeeds, the return value is the length, in characters, of the string copied to lpszShortPath, not including the terminating null character.
If the lpszShortPath is too small, the return value is the size of the buffer, in characters, required to hold the path.
If the function fails, the return value is zero. To get extended error information, use the GetLastError function.
Remarks: The "short name" can be longer than its "long name". lpszLongPath doesn't have to be a fully qualified path name or a long path name.
****/
DWORDAPIENTRYGetShortPathNameW( IN LPCWSTR lpszLongPath, IN LPWSTR lpszShortPath, IN DWORD cchBuffer ){
LPCWSTR pcs; LPWSTR pSrcCopy, pSrc, pFirst, pLast, pDst; WCHAR wch; HANDLE FindHandle; WIN32_FIND_DATAW FindData; LPWSTR Buffer; DWORD ReturnLen=0, Length; UINT PrevErrorMode; if (!ARGUMENT_PRESENT(lpszLongPath)) { SetLastError(ERROR_INVALID_PARAMETER); return 0; }
//
// override the error mode since we will be touching the media.
// This is to prevent file system's pop-up when the given path does not
// exist or the media is not available.
// we are doing this because we can not depend on the caller's current
// error mode. NOTE: the old error mode must be restored.
PrevErrorMode = SetErrorMode(SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
try { Buffer = NULL; pSrcCopy = NULL; // first, make sure the given path exist
if (0xFFFFFFFF == GetFileAttributesW(lpszLongPath)) { //
// (bjm - 3/17/99)
// This behavior (failing if the file does not exist) is new (to NT) with NT 5.
// (It's the Win9x behavior.)
// Give an exception to Norton AntiVirus Uninstall.
// If we fail this call, there will be a registry value left behind in VDD that'll cause
// undeserved ugly messages for a user. Norton AV Uninstall counts on NT 4 behavior
// which did not care if the file existed to do this conversion. This was changed in
// NT 5.0 to match Win9x behavior.
//
if ( !NtCurrentPeb() || !APPCOMPATFLAG(KACF_OLDGETSHORTPATHNAME) ) { // last error has been set by GetFileAttributes
ReturnLen = 0; goto gsnTryExit; } }
pcs = SkipPathTypeIndicator_U(lpszLongPath); if (!pcs || *pcs == UNICODE_NULL || !FindLFNorSFN_U((LPWSTR)pcs, &pFirst, &pLast, TRUE)) { // nothing to convert, copy down the source string
// to the buffer if necessary
ReturnLen = wcslen(lpszLongPath); if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszShortPath)) { if (lpszShortPath != lpszLongPath) RtlMoveMemory(lpszShortPath, lpszLongPath, (ReturnLen + 1) * sizeof(WCHAR) ); } else { // the caller does not provide enough buffer, return
// necessary string length plus the terminated null char
ReturnLen++; } goto gsnTryExit; }
// conversions are necessary, make a local copy of the string
// because we have to party on it.
ASSERT(!pSrcCopy);
// get the source string length
Length = wcslen(lpszLongPath) + 1;
pSrcCopy = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), Length * sizeof(WCHAR) ); if (!pSrcCopy) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); goto gsnTryExit; } wcsncpy(pSrcCopy, lpszLongPath, Length); // pFirst points to the first char of the very first LFN in the path
// pLast points to the char right after the last char of the very
// first LFN in the path. *pLast could be UNICODE_NULL
pFirst = pSrcCopy + (pFirst - lpszLongPath); pLast = pSrcCopy + (pLast - lpszLongPath); //
// We allow lpszShortPath be overlapped with lpszLongPath so
// allocate a local buffer.
pDst = lpszShortPath; if (cchBuffer > 0 && ARGUMENT_PRESENT(lpszShortPath) && (lpszShortPath >= lpszLongPath &&lpszShortPath < lpszLongPath + Length || lpszShortPath < lpszLongPath && lpszShortPath + cchBuffer >= lpszLongPath)) { ASSERT(!Buffer);
Buffer = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), cchBuffer * sizeof(WCHAR)); if (!Buffer){ SetLastError(ERROR_NOT_ENOUGH_MEMORY); goto gsnTryExit; } pDst = Buffer; }
pSrc = pSrcCopy;
ReturnLen = 0; do { // there are three pointers involve in the conversion loop:
// pSrc, pFirst and pLast. Their relationship
// is:
//
// "c:\long~1.1\\foo.bar\\long~2.2\\bar"
// ^ ^ ^ ^
// | | | |
// | pSrc pFirst pLast
// pSrcCopy
//
// pSrcCopy always points to the very first char of the entire
// path.
//
// chars between pSrc(included) and pFirst(not included)
// do not need conversion so we simply copy them.
// chars between pFirst(included) and pLast(not included)
// need conversion.
//
Length = (ULONG)(pFirst - pSrc); if (Length) { ReturnLen += Length; if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszShortPath)) { RtlMoveMemory(pDst, pSrc, Length * sizeof(WCHAR)); pDst += Length; } } wch = *pLast; *pLast = UNICODE_NULL; FindHandle = FindFirstFileW(pSrcCopy, &FindData); *pLast = wch; if (INVALID_HANDLE_VALUE != FindHandle) { FindClose(FindHandle); // if no short name could be found, copy the original name.
// the origian name starts with pFirst(included) and ends
// with pLast(excluded).
if (!(Length = wcslen(FindData.cAlternateFileName))) Length = (ULONG)(pLast - pFirst); else pFirst = FindData.cAlternateFileName; ReturnLen += Length; if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszShortPath)) { RtlMoveMemory(pDst, pFirst, Length * sizeof(WCHAR)); pDst += Length; } } else { // part of the path does not exist, fail the function
//
ReturnLen = 0; break; } // move to next path name
pSrc = pLast; if (*pLast == UNICODE_NULL) break; }while (FindLFNorSFN_U(pSrc, &pFirst, &pLast, TRUE));
// if ReturnLen == 0, we fail somewhere inside while loop.
if (ReturnLen) { // (*pSrc == UNICODE_NULL) means the last pathname is a LFN which
// has been dealt with. otherwise, the substring pointed by
// pSrc is a legal short path name and we have to copy it
//Length could be zero
Length = wcslen(pSrc); ReturnLen += Length; if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszShortPath)) { //include the terminated null char
RtlMoveMemory(pDst, pSrc, (Length + 1)* sizeof(WCHAR)); if (Buffer) RtlMoveMemory(lpszShortPath, Buffer, (ReturnLen + 1) * sizeof(WCHAR)); } else // not enough buffer, the return value counts the terminated NULL
ReturnLen++; }gsnTryExit:; } finally { if (Buffer) RtlFreeHeap(RtlProcessHeap(), 0, Buffer); if (pSrcCopy) RtlFreeHeap(RtlProcessHeap(), 0, pSrcCopy);
// restore the error mode
SetErrorMode(PrevErrorMode); }
return ReturnLen;}
/**
function to create VDM environment for the new executable. Input: lpEnvironmen = optinal environment strings prototype in UNICODE. If it is NULL, this function use the environment block attached to the process pAStringEnv = pointer to a ANSI_STRING to receive the new environment strings. pUStringEnv = pointer to a UNICODE_STRING to receive the new environment strings. Output: FALSE if the creattion failed. TRUE creation successful, pAStringEnv has been setup.
This function was provided so that BaseCheckVdm can have correct environment(includes the newly create NTVDM process). This was done because before command.com gets the next command, users can have tons of things specified in config.sys and autoexec.bat which may rely on current directory of each drive.**/BOOL BaseCreateVDMEnvironment( PWCHAR lpEnvironment, ANSI_STRING * pAStringEnv, UNICODE_STRING *pUStringEnv ){ WCHAR *pEnv, *pDst, *EnvStrings=NULL,* pTmp, *pNewEnv=NULL; DWORD cchEnv, dw, Length, dwRemain; NTSTATUS Status; UINT NameType; BOOL bRet = FALSE; SIZE_T EnvSize;
if (!ARGUMENT_PRESENT(pAStringEnv) || !ARGUMENT_PRESENT(pUStringEnv)){ SetLastError(ERROR_INVALID_PARAMETER); return FALSE; } try { // the environment strings are shared by every thread of the same
// process. Since we have no idea of what the caller process
// is, we have to grab the entire environment to our local buffer in one
// shot then we can walk through the strings.
// Note that if another thread makes call to RtlSetEnvironmentVariable
// then we are out of sync. It is a problem of process structure and
// I don't want to think about it now.
// The funny thing is that we have to assume the environment
// is a block of strings(otherwise, how can we do it?)t, nothing more and
// nothing less. If someday and somebody dares to change it, he will be
// the one to blame. If the caller(CreateProcess)
// provides the environment, we assume it is safe to walk through it.
//
if (lpEnvironment == NULL) { // create a new environment and inherit the current process env
Status = RtlCreateEnvironment(TRUE, (PVOID *)&EnvStrings); if (!NT_SUCCESS(Status)) goto bveTryExit; } else EnvStrings = lpEnvironment;
if (EnvStrings == NULL) { SetLastError(ERROR_BAD_ENVIRONMENT); goto bveTryExit; } // figure out how long the environment is
// why can Rtl just provides such a function for us?
//
cchEnv = 0; pEnv = EnvStrings; // environment is double-null terminated
while (!(*pEnv++ == UNICODE_NULL && *pEnv == UNICODE_NULL)) cchEnv++; // count the last two NULLs
cchEnv += 2; // we don't want to change the original environment, so
// make a local buffer for it.
EnvSize = (cchEnv + MAX_PATH) * sizeof(WCHAR); Status = NtAllocateVirtualMemory( NtCurrentProcess(), &pNewEnv, 0, &EnvSize, MEM_COMMIT, PAGE_READWRITE ); if (!NT_SUCCESS(Status) ) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); pNewEnv = NULL; goto bveTryExit; } // give the last two for null
dwRemain = MAX_PATH - 2; // now walk through the environment string
pEnv = EnvStrings; // the new environmet will be
pDst = pNewEnv; while (*pEnv != UNICODE_NULL) { // current directory environment has the form as:
// "=d:=d:\pathname" where d: is the drive designator.
if (pEnv[0] == L'=') { if ((pEnv[1] >= L'A' && pEnv[1] <= L'Z' || pEnv[1] >= L'a' && pEnv[1] <= L'z') && pEnv[2] == L':' && pEnv[3] == L'=' && wcslen(pEnv) >= 7) { // hack hack!!!!
// if the path points to the root directory,
// bypass the conversion. Dos or Wow keeps current directory
// for every valid drive. If we do the conversion for
// every current directory, it could take several
// seconds on removable drives, especially, on
// floppy drives.
if (pEnv[7] == UNICODE_NULL && (pEnv[6] == L'\\' || pEnv[6] == L'/') && pEnv[5] == L':' && (pEnv[4] >= L'A' && pEnv[4] <= L'Z' || pEnv[4] >= L'a' && pEnv[4] <= L'z')) { NameType = ENV_NAME_TYPE_NO_PATH; } else { // copy "=N:=", where N is the drive letter
*pDst++ = *pEnv++;*pDst++ = *pEnv++; *pDst++ = *pEnv++;*pDst++ = *pEnv++; NameType = ENV_NAME_TYPE_SINGLE_PATH; } } else { // a weird environment was detected.
// treat it as no path
NameType = ENV_NAME_TYPE_NO_PATH; } } else { pTmp = pEnv; // copy down the name and the '='
while (*pEnv != UNICODE_NULL && (*pDst++ = *pEnv++) != L'=') ; NameType = BaseGetEnvNameType_U(pTmp, (DWORD)(pEnv - pTmp) - 1); }
if (NameType == ENV_NAME_TYPE_NO_PATH) { while ((*pDst++ = *pEnv++) != UNICODE_NULL) ; } else if (NameType == ENV_NAME_TYPE_SINGLE_PATH) { Length = wcslen(pEnv) + 1; dw = GetShortPathNameW(pEnv, pDst, Length + dwRemain); // if the conversion failed, we simply pass down the original
// one no matter what the reason is. This is done because we
// are doing the environment strings.
if (dw == 0 || dw >= Length + dwRemain){ RtlMoveMemory(pDst, pEnv, Length * sizeof(WCHAR)); dw = Length - 1; } pDst += dw + 1; pEnv += Length; if (dw > Length) dwRemain -= dw - Length; } else { // multiple path name found.
// the character ';' is used for seperator
pTmp = pEnv; while(*pEnv != UNICODE_NULL) { if (*pEnv == L';') { // length not include the ';'
Length = (DWORD)(pEnv - pTmp); if (Length > 0) { *pEnv = UNICODE_NULL; dw = GetShortPathNameW(pTmp, pDst, Length + 1 + dwRemain); // again, if the conversion failed, use the original one
if (dw == 0 || dw > Length + dwRemain) { RtlMoveMemory(pDst, pTmp, Length * sizeof(WCHAR)); dw = Length; } pDst += dw; *pDst++ = *pEnv++ = L';'; if (dw > Length) dwRemain -= dw - Length; } // skip all consecutive ';'
while (*pEnv == L';') *pDst++ = *pEnv++; pTmp = pEnv; } else pEnv++; } // convert the last one
if ((Length = (DWORD)(pEnv - pTmp)) != 0) { dw = GetShortPathNameW(pTmp, pDst, Length+1 + dwRemain); if (dw == 0 || dw > Length) { RtlMoveMemory(pDst, pTmp, Length * sizeof(WCHAR)); dw = Length; } pDst += dw; if (dw > Length) dwRemain -= dw - Length; } *pDst++ = *pEnv++; } } *pDst++ = UNICODE_NULL; cchEnv = (ULONG)((ULONG_PTR)pDst - (ULONG_PTR)pNewEnv); pUStringEnv->MaximumLength = pUStringEnv->Length = (USHORT)cchEnv; pUStringEnv->Buffer = pNewEnv; Status = RtlUnicodeStringToAnsiString(pAStringEnv, pUStringEnv, TRUE );
if (!NT_SUCCESS(Status)) { BaseSetLastNTError(Status); } else { pNewEnv = NULL; bRet = TRUE; }bveTryExit:; } finally { if (lpEnvironment == NULL && EnvStrings != NULL) { RtlDestroyEnvironment(EnvStrings); } if (pNewEnv != NULL) { pUStringEnv->Length = pUStringEnv->MaximumLength = 0; pUStringEnv->Buffer = NULL; pAStringEnv->Length = pAStringEnv->MaximumLength = 0; pAStringEnv->Buffer = NULL; Status = NtFreeVirtualMemory (NtCurrentProcess(), &pNewEnv, &EnvSize, MEM_DECOMMIT); ASSERT (NT_SUCCESS (Status)); } } return bRet;}/**
Destroy the environment block created by BaseCreateVDMEnvironment Input: ANSI_STRING * pAnsiStringVDMEnv Environment block in ANSI, should be freed via RtlFreeAnsiString UNICODE_STRING * pUnicodeStringEnv Environment block in UNICODE. The Buffer should be freed with RtlFreeHeap. Output: should always be TRUE.
**/
BOOLBaseDestroyVDMEnvironment( ANSI_STRING *pAStringEnv, UNICODE_STRING *pUStringEnv ){ if (pAStringEnv->Buffer) RtlFreeAnsiString(pAStringEnv); if (pUStringEnv->Buffer) { NTSTATUS Status; SIZE_T RegionSize;
//
// Free the specified environment variable block.
//
RegionSize = 0; Status = NtFreeVirtualMemory( NtCurrentProcess(), &pUStringEnv->Buffer, &RegionSize, MEM_RELEASE ); } return TRUE;
}
/**
This function returns the name type of the given environment variable name The name type has three possibilities. Each one represents if the given name can have pathnames as its value. ENV_NAME_TYPE_NO_PATH: no pathname can be its value ENV_NAME_TYPE_SINGLE_PATH: single pathname ENV_NAME_MULTIPLE_PATH: multiple path
SIDE NOTE: Currently, nt can not installed on a long path and it seems that systemroot and windir are never be in long path.
**/UINTBaseGetEnvNameType_U(WCHAR * Name, DWORD NameLength){
// so far we only take care of five predefined names:
// PATH
// WINDIR and
// SYSTEMROOT.
// TEMP
// TMP
//
static ENV_INFO EnvInfoTable[STD_ENV_NAME_COUNT] = { {ENV_NAME_TYPE_MULTIPLE_PATH, ENV_NAME_PATH_LEN, ENV_NAME_PATH}, {ENV_NAME_TYPE_SINGLE_PATH, ENV_NAME_WINDIR_LEN, ENV_NAME_WINDIR}, {ENV_NAME_TYPE_SINGLE_PATH, ENV_NAME_SYSTEMROOT_LEN, ENV_NAME_SYSTEMROOT}, {ENV_NAME_TYPE_MULTIPLE_PATH, ENV_NAME_TEMP_LEN, ENV_NAME_TEMP}, {ENV_NAME_TYPE_MULTIPLE_PATH, ENV_NAME_TMP_LEN, ENV_NAME_TMP} };
UINT NameType; int i;
NameType = ENV_NAME_TYPE_NO_PATH; for (i = 0; i < STD_ENV_NAME_COUNT; i++) { if (EnvInfoTable[i].NameLength == NameLength && !_wcsnicmp(EnvInfoTable[i].Name, Name, NameLength)) { NameType = EnvInfoTable[i].NameType; break; } } return NameType;}
DWORDAPIENTRYGetLongPathNameA( IN LPCSTR lpszShortPath, IN LPSTR lpLongPath, IN DWORD cchBuffer ){ UNICODE_STRING UString, UStringRet; ANSI_STRING AString; NTSTATUS Status; LPWSTR lpLongPathW = NULL; WCHAR TempPathW[MAX_PATH]; DWORD ReturnValue, ReturnValueW;
if (lpszShortPath == NULL) { SetLastError(ERROR_INVALID_PARAMETER); return 0; }
AString.Buffer = NULL; UString.Buffer = NULL;
ReturnValue = 0; ReturnValueW = 0;
try { if (!Basep8BitStringToDynamicUnicodeString(&UString, lpszShortPath )) { goto glpTryExit; }
// we have to get the real converted path in order to find out
// the required length. An UNICODE char does not necessarily convert
// to one ANSI char(A DBCS is basically TWO ANSI char!!!!!).
// First, we use the buffer allocated from the stack. If the buffer
// is too small, we then allocate it from heap.
// A check of (lpLongPathW && TempPathW != lpLongPathW) will reveal
// if we have allocated a buffer from heap and need to release it.
lpLongPathW = TempPathW; ReturnValueW = GetLongPathNameW(UString.Buffer, lpLongPathW, sizeof(TempPathW) / sizeof(WCHAR)); if (ReturnValueW >= sizeof(TempPathW) / sizeof(WCHAR)) { // the stack-based buffer is too small. Allocate a new buffer
// from heap.
lpLongPathW = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), ReturnValueW * sizeof(WCHAR) ); if (lpLongPathW) { ReturnValueW = GetLongPathNameW(UString.Buffer, lpLongPathW, ReturnValueW); } else { ReturnValueW = 0; SetLastError(ERROR_NOT_ENOUGH_MEMORY); } }
if (ReturnValueW) { // we are here because we have something interesting left to do.
// Convert the UNICODE path name to ANSI(or OEM).
UString.MaximumLength = (USHORT)((ReturnValueW + 1) * sizeof(WCHAR)); UStringRet.Buffer = lpLongPathW; UStringRet.Length = (USHORT)(ReturnValueW * sizeof(WCHAR)); Status = BasepUnicodeStringTo8BitString(&AString, &UStringRet, TRUE );
if (!NT_SUCCESS(Status)) { BaseSetLastNTError(Status); ReturnValue=0; goto glpTryExit; } // now AString.Length contains the size of the converted path
// name. If the caller provides enough buffer, copy the
// path name.
ReturnValue = AString.Length; if (ARGUMENT_PRESENT(lpLongPath) && cchBuffer > ReturnValue) { RtlMoveMemory(lpLongPath, AString.Buffer, ReturnValue); // terminate the buffer with NULL char.
lpLongPath[ReturnValue] = '\0'; } else { // either the caller does not provide a buffer or
// the provided buffer is too small, return the required size,
// including the terminated null char.
ReturnValue++; } }glpTryExit:; }
finally { if (UString.Buffer) RtlFreeUnicodeString(&UString); if (AString.Buffer) RtlFreeAnsiString(&AString); if (lpLongPathW && lpLongPathW != TempPathW) RtlFreeHeap(RtlProcessHeap(), 0, lpLongPathW); } return ReturnValue;}
DWORDAPIENTRYGetLongPathNameW( IN LPCWSTR lpszShortPath, IN LPWSTR lpszLongPath, IN DWORD cchBuffer){
LPCWSTR pcs; DWORD ReturnLen, Length; LPWSTR pSrc, pSrcCopy, pFirst, pLast, Buffer, pDst; WCHAR wch; HANDLE FindHandle; WIN32_FIND_DATAW FindData; UINT PrevErrorMode;
if (!ARGUMENT_PRESENT(lpszShortPath)) { SetLastError(ERROR_INVALID_PARAMETER); return 0; } //
// override the error mode since we will be touching the media.
// This is to prevent file system's pop-up when the given path does not
// exist or the media is not available.
// we are doing this because we can not depend on the caller's current
// error mode. NOTE: the old error mode must be restored.
PrevErrorMode = SetErrorMode(SEM_NOOPENFILEERRORBOX | SEM_FAILCRITICALERRORS);
try {
Buffer = NULL; pSrcCopy = NULL; // first make sure the given path exist.
//
if (0xFFFFFFFF == GetFileAttributesW(lpszShortPath)) { // last error has been set by GetFileAttributes
ReturnLen = 0; goto glnTryExit; } pcs = SkipPathTypeIndicator_U(lpszShortPath); if (!pcs || *pcs == UNICODE_NULL || !FindLFNorSFN_U((LPWSTR)pcs, &pFirst, &pLast, FALSE)) { // The path is ok and does not need conversion at all.
// Check if we need to do copy
ReturnLen = wcslen(lpszShortPath); if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszLongPath)) { if (lpszLongPath != lpszShortPath) RtlMoveMemory(lpszLongPath, lpszShortPath, (ReturnLen + 1)* sizeof(WCHAR) ); } else { // No buffer or buffer too small, the return size
// has to count the terminated NULL char
ReturnLen++; } goto glnTryExit; }
// conversions are necessary, make a local copy of the string
// because we have to party on it.
ASSERT(!pSrcCopy);
Length = wcslen(lpszShortPath) + 1; pSrcCopy = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), Length * sizeof(WCHAR) ); if (!pSrcCopy) { SetLastError(ERROR_NOT_ENOUGH_MEMORY); goto glnTryExit; } RtlMoveMemory(pSrcCopy, lpszShortPath, Length * sizeof(WCHAR)); // pFirst points to the first char of the very first SFN in the path
// pLast points to the char right after the last char of the very
// first SFN in the path. *pLast could be UNICODE_NULL
pFirst = pSrcCopy + (pFirst - lpszShortPath); pLast = pSrcCopy + (pLast - lpszShortPath); //
// We allow lpszShortPath be overlapped with lpszLongPath so
// allocate a local buffer if necessary:
// (1) the caller does provide a legitimate buffer and
// (2) the buffer overlaps with lpszShortName
pDst = lpszLongPath; if (cchBuffer && ARGUMENT_PRESENT(lpszLongPath) && (lpszLongPath >= lpszShortPath && lpszLongPath < lpszShortPath + Length || lpszLongPath < lpszShortPath && lpszLongPath + cchBuffer >= lpszShortPath)) { ASSERT(!Buffer);
Buffer = RtlAllocateHeap(RtlProcessHeap(), MAKE_TAG( VDM_TAG ), cchBuffer * sizeof(WCHAR)); if (!Buffer){ SetLastError(ERROR_NOT_ENOUGH_MEMORY); goto glnTryExit; } pDst = Buffer; }
pSrc = pSrcCopy; ReturnLen = 0; do { // there are three pointers involve in the conversion loop:
// pSrc, pFirst and pLast. Their relationship
// is:
//
// "c:\long~1.1\\foo.bar\\long~2.2\\bar"
// ^ ^ ^ ^
// | | | |
// | pSrc pFirst pLast
// pSrcCopy
//
// pSrcCopy always points to the very first char of the entire
// path.
//
// chars between pSrc(included) and pFirst(not included)
// do not need conversion so we simply copy them.
// chars between pFirst(included) and pLast(not included)
// need conversion.
//
Length = (ULONG)(pFirst - pSrc); ReturnLen += Length; if (Length && cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszShortPath)) { RtlMoveMemory(pDst, pSrc, Length * sizeof(WCHAR)); pDst += Length; } // now try to convert the name, chars between pFirst and (pLast - 1)
wch = *pLast; *pLast = UNICODE_NULL; FindHandle = FindFirstFileW(pSrcCopy, &FindData); *pLast = wch; if (FindHandle != INVALID_HANDLE_VALUE){ FindClose(FindHandle); // if no long name, copy the original name
// starts with pFirst(included) and ends with pLast(excluded)
if (!(Length = wcslen(FindData.cFileName))) Length = (ULONG)(pLast - pFirst); else pFirst = FindData.cFileName; ReturnLen += Length; if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszLongPath)) { RtlMoveMemory(pDst, pFirst, Length * sizeof(WCHAR)); pDst += Length; } } else { // invalid path, reset the length, mark the error and
// bail out of the loop. We will be copying the source
// to destination later.
//
ReturnLen = 0; break; } pSrc = pLast; if (*pSrc == UNICODE_NULL) break; } while (FindLFNorSFN_U(pSrc, &pFirst, &pLast, FALSE));
if (ReturnLen) { //copy the rest of the path from pSrc. This may only contain
//a single NULL char
Length = wcslen(pSrc); ReturnLen += Length; if (cchBuffer > ReturnLen && ARGUMENT_PRESENT(lpszLongPath)) { RtlMoveMemory(pDst, pSrc, (Length + 1) * sizeof(WCHAR)); if (Buffer) RtlMoveMemory(lpszLongPath, Buffer, (ReturnLen + 1) * sizeof(WCHAR)); } else ReturnLen++; }
glnTryExit: ; } finally { if (pSrcCopy) RtlFreeHeap(RtlProcessHeap(), 0, pSrcCopy); if (Buffer) RtlFreeHeap(RtlProcessHeap(), 0, Buffer); }
// restore error mode.
SetErrorMode(PrevErrorMode); return ReturnLen;}
/**
Search for SFN(Short File Name) or LFN(Long File Name) in the given path depends on FindLFN.
Input: LPWSTR Path The given path name. Does not have to be fully qualified. However, path type separaters are not allowed. LPWSTR* ppFirst To return the pointer points to the first char of the name found. LPWSTR* ppLast To return the pointer points the char right after the last char of the name found. BOOL FindLFN TRUE to search for LFN, otherwise, search for SFN
Output: TRUE if the target file name type is found, ppFirst and ppLast are filled with pointers. FALSE if the target file name type not found.
Remark: "\\." and "\\.." are special cases. When encountered, they are ignored and the function continue to search
**/BOOLFindLFNorSFN_U( LPWSTR Path, LPWSTR* ppFirst, LPWSTR* ppLast, BOOL FindLFN ){ LPWSTR pFirst, pLast; BOOL TargetFound;
ASSERT(Path);
pFirst = Path;
TargetFound = FALSE;
while(TRUE) { //skip over leading path separator
// it is legal to have multiple path separators in between
// name such as "foobar\\\\\\multiplepathchar"
while (*pFirst != UNICODE_NULL && (*pFirst == L'\\' || *pFirst == L'/')) pFirst++; if (*pFirst == UNICODE_NULL) break; pLast = pFirst + 1; while (*pLast != UNICODE_NULL && *pLast != L'\\' && *pLast != L'/') pLast++; if (FindLFN) TargetFound = !IsShortName_U(pFirst, (int)(pLast - pFirst)); else TargetFound = !IsLongName_U(pFirst, (int)(pLast - pFirst)); if (TargetFound) { if(ppFirst && ppLast) { *ppFirst = pFirst; // pLast point to the last char of the path/file name
*ppLast = pLast; } break; } if (*pLast == UNICODE_NULL) break; pFirst = pLast + 1; } return TargetFound;}LPCWSTRSkipPathTypeIndicator_U( LPCWSTR Path ){ RTL_PATH_TYPE RtlPathType; LPCWSTR pFirst; DWORD Count;
RtlPathType = RtlDetermineDosPathNameType_U(Path); switch (RtlPathType) { // form: "\\server_name\share_name\rest_of_the_path"
case RtlPathTypeUncAbsolute: case RtlPathTypeLocalDevice: pFirst = Path + 2; Count = 2; // guard for UNICODE_NULL is necessary because
// RtlDetermineDosPathNameType_U doesn't really
// verify an UNC name.
while (Count && *pFirst != UNICODE_NULL) { if (*pFirst == L'\\' || *pFirst == L'/') Count--; pFirst++; } break;
// form: "\\."
case RtlPathTypeRootLocalDevice: pFirst = NULL; break;
// form: "D:\rest_of_the_path"
case RtlPathTypeDriveAbsolute: pFirst = Path + 3; break;
// form: "D:rest_of_the_path"
case RtlPathTypeDriveRelative: pFirst = Path + 2; break;
// form: "\rest_of_the_path"
case RtlPathTypeRooted: pFirst = Path + 1; break;
// form: "rest_of_the_path"
case RtlPathTypeRelative: pFirst = Path; break;
default: pFirst = NULL; break; } return pFirst;}
/**
This function determines if the given name is a valid short name. This function only does "obvious" testing since there are not precise ways to cover all the file systems(each file system has its own file name domain(for example, FAT allows all extended chars and space char while NTFS **may** not). The main purpose is to help the caller decide if a long to short name conversion is necessary. When in doubt, this function simply tells the caller that the given name is NOT a short name so that caller would do whatever it takes to convert the name. This function applies strict rules in deciding if the given name is a valid short name. For example, a name containing any extended chars is treated as invalid; a name with embedded space chars is also treated as invalid. A name is a valid short name if ALL the following conditions are met: (1). total length <= 13. (2). 0 < base name length <= 8. (3). extention name length <= 3. (4). only one '.' is allowed and must not be the first char. (5). every char must be legal defined by the IllegalMask array.
null path, "." and ".." are treated valid.
Input: LPCWSTR Name - points to the name to be checked. It does not have to be NULL terminated.
int Length - Length of the name, not including teminated NULL char.
output: TRUE - if the given name is a short file name. FALSE - if the given name is not a short file name**/
// bit set -> char is illegal
DWORD IllegalMask[] =
{ // code 0x00 - 0x1F --> all illegal
0xFFFFFFFF, // code 0x20 - 0x3f --> 0x20,0x22,0x2A-0x2C,0x2F and 0x3A-0x3F are illegal
0xFC009C05, // code 0x40 - 0x5F --> 0x5B-0x5D are illegal
0x38000000, // code 0x60 - 0x7F --> 0x7C is illegal
0x10000000};
BOOLIsShortName_U( LPCWSTR Name, int Length ){ int Index; BOOL ExtensionFound; DWORD dwStatus; UNICODE_STRING UnicodeName; ANSI_STRING AnsiString; UCHAR AnsiBuffer[MAX_PATH]; UCHAR Char;
ASSERT(Name);
// total length must less than 13(8.3 = 8 + 1 + 3 = 12)
if (Length > 12) return FALSE; // "" or "." or ".."
if (!Length) return TRUE; if (L'.' == *Name) { // "." or ".."
if (1 == Length || (2 == Length && L'.' == Name[1])) return TRUE; else // '.' can not be the first char(base name length is 0)
return FALSE; }
UnicodeName.Buffer = (LPWSTR)Name; UnicodeName.Length = UnicodeName.MaximumLength = (USHORT)(Length * sizeof(WCHAR));
AnsiString.Buffer = AnsiBuffer; AnsiString.Length = 0; AnsiString.MaximumLength = MAX_PATH; // make a dangerous assumption
dwStatus = BasepUnicodeStringTo8BitString(&AnsiString, &UnicodeName, FALSE); if (! NT_SUCCESS(dwStatus)) { return(FALSE); }
// all trivial cases are tested, now we have to walk through the name
ExtensionFound = FALSE; for (Index = 0; Index < AnsiString.Length; Index++) { Char = AnsiString.Buffer[Index];
// Skip over and Dbcs characters
if (IsDBCSLeadByte(Char)) { //
// 1) if we're looking at base part ( !ExtensionPresent ) and the 8th byte
// is in the dbcs leading byte range, it's error ( Index == 7 ). If the
// length of base part is more than 8 ( Index > 7 ), it's definitely error.
//
// 2) if the last byte ( Index == DbcsName.Length - 1 ) is in the dbcs leading
// byte range, it's error
//
if ((!ExtensionFound && (Index >= 7)) || (Index == AnsiString.Length - 1)) { return FALSE; } Index += 1; continue; }
// make sure the char is legal
if (Char > 0x7F || IllegalMask[Char / 32] & (1 << (Char % 32))) return FALSE;
if ('.' == Char) { // (1) can have only one '.'
// (2) can not have more than 3 chars following.
if (ExtensionFound || Length - (Index + 1) > 3) { return FALSE; } ExtensionFound = TRUE; } // base length > 8 chars
if (Index >= 8 && !ExtensionFound) return FALSE; } return TRUE;
}
/**
This function determines if the given name is a valid long name. This function only does "obvious" testing since there are not precise ways to cover all the file systems(each file system has its own file name domain(for example, FAT allows all extended chars and space char while NTFS **may** not) This function helps the caller to determine if a short to long name conversion is necessary. When in doubt, this function simply tells the caller that the given name is NOT a long name so that caller would do whatever it takes to convert the name. A name is a valid long name if one of the following conditions is met: (1). total length >= 13. (2). 0 == base name length || base name length > 8. (3). extention name length > 3. (4). '.' is the first char. (5). muitlple '.'
null path, "." and ".." are treat as valid long name.
Input: LPCWSTR Name - points to the name to be checked. It does not have to be NULL terminated.
int Length - Length of the name, not including teminated NULL char.
output: TRUE - if the given name is a long file name. FALSE - if the given name is not a long file name**/
BOOLIsLongName_U( LPCWSTR Name, int Length ){ int Index; BOOL ExtensionFound; // (1) NULL path
// (2) total length > 12
// (3) . is the first char (cover "." and "..")
if (!Length || Length > 12 || L'.' == *Name) return TRUE; ExtensionFound = FALSE; for (Index = 0; Index < Length; Index++) { if (L'.' == Name[Index]) { // multiple . or extension longer than 3
if (ExtensionFound || Length - (Index + 1) > 3) return TRUE; ExtensionFound = TRUE; } // base length longer than 8
if (Index >= 8 && !ExtensionFound) return TRUE; } return FALSE;}
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