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FileRoutines.cpp
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FileRoutines.cpp
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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the LICENSE file distributed with
* this work for additional information regarding copyright ownership.
*
* Also, if exists, check the Licenses directory for information about
* third-party modules.
*
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "FileRoutines.h"
#include <WaitableObjects.h>
#include <ShlObj.h>
#include <fileapi.h>
#include <Debug.h>
//-----------------------------------------------------------
#define CREATE_RETRIES_COUNT 600
#define CREATE_RETRIES_DELAY_MS 15
#define DELETE_RETRIES_COUNT 400
#define DELETE_RETRIES_DELAY_MS 15
#ifndef FILE_SUPERSEDE
#define FILE_SUPERSEDE 0x00000000
#endif //FILE_SUPERSEDE
#ifndef FILE_OPEN
#define FILE_OPEN 0x00000001
#endif //FILE_OPEN
#ifndef FILE_CREATE
#define FILE_CREATE 0x00000002
#endif //FILE_CREATE
#ifndef FILE_SYNCHRONOUS_IO_NONALERT
#define FILE_SYNCHRONOUS_IO_NONALERT 0x00000020
#endif //FILE_SYNCHRONOUS_IO_NONALERT
#ifndef FILE_NON_DIRECTORY_FILE
#define FILE_NON_DIRECTORY_FILE 0x00000040
#endif //FILE_NON_DIRECTORY_FILE
#ifndef OBJ_CASE_INSENSITIVE
#define OBJ_CASE_INSENSITIVE 0x00000040
#endif //OBJ_CASE_INSENSITIVE
#ifndef STATUS_OBJECT_TYPE_MISMATCH
#define STATUS_OBJECT_TYPE_MISMATCH ((NTSTATUS)0xC0000024L)
#endif //STATUS_OBJECT_TYPE_MISMATCH
#ifndef STATUS_OBJECT_NAME_INVALID
#define STATUS_OBJECT_NAME_INVALID ((NTSTATUS)0xC0000033L)
#endif //STATUS_OBJECT_NAME_INVALID
#ifndef STATUS_OBJECT_PATH_NOT_FOUND
#define STATUS_OBJECT_PATH_NOT_FOUND ((NTSTATUS)0xC000003AL)
#endif //STATUS_OBJECT_PATH_NOT_FOUND
#define ___KF_FLAG_CREATE 0x00008000
//-----------------------------------------------------------
typedef HRESULT (__stdcall *lpfnSHGetKnownFolderPath)(_In_ const GUID &rfid, _In_ DWORD dwFlags,
_In_opt_ HANDLE hToken, _Out_ PWSTR *ppszPath);
typedef HRESULT (__stdcall *lpfnSHGetFolderPathW)(_Reserved_ HWND hwnd, _In_ int csidl, _In_opt_ HANDLE hToken,
_In_ DWORD dwFlags, _Out_writes_(MAX_PATH) LPWSTR pszPath);
typedef VOID (__stdcall *lpfnCoTaskMemFree)(_In_opt_ LPVOID pv);
//-----------------------------------------------------------
static HRESULT _GetKnownFolderFolderPath(_In_ int csIdl, _In_ const GUID &sGuid, _In_ BOOL bCreate,
_Out_ MX::CStringW &cStrDestW);
//-----------------------------------------------------------
namespace MX {
namespace FileRoutines {
HRESULT GetAppFileName(_Out_ CStringW &cStrDestW)
{
DWORD dwSize, dwLen;
HRESULT hRes;
for (dwSize = 256; dwSize <= 32768; dwSize <<= 1)
{
if (cStrDestW.EnsureBuffer((SIZE_T)dwSize + 4) == FALSE)
return E_OUTOFMEMORY;
dwLen = ::GetModuleFileNameW(NULL, (LPWSTR)cStrDestW, dwSize);
if (dwLen == 0)
{
hRes = MX_HRESULT_FROM_LASTERROR();
return (FAILED(hRes)) ? hRes : E_FAIL;
}
if (dwLen < dwSize - 2)
break;
}
if (dwSize > 32768)
return E_OUTOFMEMORY;
((LPWSTR)cStrDestW)[dwLen] = 0;
cStrDestW.Refresh();
NormalizePath(cStrDestW);
return ConvertToLongPath(cStrDestW);
}
HRESULT GetAppFolderPath(_Out_ CStringW &cStrDestW)
{
HRESULT hRes;
hRes = GetAppFileName(cStrDestW);
if (SUCCEEDED(hRes))
{
LPCWSTR sW = (LPWSTR)cStrDestW;
SIZE_T nLen = cStrDestW.GetLength();
while (nLen > 0 && sW[nLen - 1] != L'\\')
nLen--;
cStrDestW.Delete(nLen, (SIZE_T)-1);
}
return hRes;
}
HRESULT GetProcessFileName(_In_ DWORD dwPid, _Out_ CStringW &cStrDestW)
{
HANDLE hProc;
HRESULT hRes;
hProc = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, dwPid);
if (hProc != NULL)
{
hRes = GetProcessFileName(hProc, cStrDestW);
::CloseHandle(hProc);
}
else
{
hRes = MX_HRESULT_FROM_LASTERROR();
cStrDestW.Empty();
}
//done
return hRes;
}
HRESULT GetProcessFileName(_In_ HANDLE hProc, _Out_ CStringW &cStrDestW)
{
PMX_UNICODE_STRING FileName = NULL;
ULONG RetLength;
NTSTATUS nNtStatus;
HRESULT hRes;
if (hProc == NULL || hProc == INVALID_HANDLE_VALUE)
{
cStrDestW.Empty();
return E_INVALIDARG;
}
FileName = (PMX_UNICODE_STRING)MX_MALLOC(sizeof(MX_UNICODE_STRING) + 256);
if (FileName == NULL)
return E_OUTOFMEMORY;
FileName->Buffer = (PWCH)(FileName + 1);
FileName->Length = 0;
FileName->MaximumLength = 256;
RetLength = 0;
nNtStatus = ::MxNtQueryInformationProcess(hProc, MxProcessImageFileName, FileName,
(ULONG)sizeof(MX_UNICODE_STRING) + 256, &RetLength);
if (nNtStatus == STATUS_INFO_LENGTH_MISMATCH || nNtStatus == STATUS_BUFFER_TOO_SMALL ||
nNtStatus == STATUS_BUFFER_OVERFLOW)
{
MX_FREE(FileName);
if (RetLength >= sizeof(MX_UNICODE_STRING))
{
FileName = (PMX_UNICODE_STRING)MX_MALLOC((SIZE_T)RetLength);
if (FileName == NULL)
return E_OUTOFMEMORY;
FileName->Buffer = (PWCH)(FileName + 1);
FileName->Length = 0;
FileName->MaximumLength = (USHORT)(RetLength - (ULONG)sizeof(MX_UNICODE_STRING));
RetLength = 0;
nNtStatus = ::MxNtQueryInformationProcess(hProc, MxProcessImageFileName, FileName, RetLength, &RetLength);
}
else
{
nNtStatus = STATUS_BUFFER_OVERFLOW;
}
}
if (nNtStatus < 0)
{
MX_FREE(FileName);
cStrDestW.Empty();
return MX_HRESULT_FROM_WIN32(::MxRtlNtStatusToDosError(nNtStatus));
}
if (cStrDestW.CopyN(FileName->Buffer, (SIZE_T)(FileName->Length / 2)) == FALSE)
{
MX_FREE(FileName);
return E_OUTOFMEMORY;
}
MX_FREE(FileName);
hRes = ConvertToLongPath(cStrDestW);
if (SUCCEEDED(hRes))
hRes = ConvertToWin32(cStrDestW);
if (hRes == E_OUTOFMEMORY)
{
cStrDestW.Empty();
return hRes;
}
//done
return S_OK;
}
HRESULT GetCommonAppDataFolderPath(_Out_ CStringW &cStrDestW)
{
static const GUID __FOLDERID_ProgramData = {
0x62AB5D82, 0xFDC1, 0x4DC3, { 0xA9, 0xDD, 0x07, 0x0D, 0x1D, 0x49, 0x5D, 0x97 }
};
return _GetKnownFolderFolderPath(CSIDL_COMMON_APPDATA, __FOLDERID_ProgramData, TRUE, cStrDestW);
}
HRESULT GetProgramFilesFolderPath(_Out_ CStringW &cStrDestW)
{
static const GUID __FOLDERID_ProgramFiles = {
0x905E63B6, 0xC1BF, 0x494E, { 0xB2, 0x9C, 0x65, 0xB7, 0x32, 0xD3, 0xD2, 0x1A }
};
return _GetKnownFolderFolderPath(CSIDL_PROGRAM_FILES, __FOLDERID_ProgramFiles, TRUE, cStrDestW);
}
#if defined(_M_X64)
HRESULT GetProgramFilesX86FolderPath(_Out_ CStringW &cStrDestW)
{
static const GUID __FOLDERID_ProgramFilesX86 = {
0x7C5A40EF, 0xA0FB, 0x4BFC, { 0x87, 0x4A, 0xC0, 0xF2, 0xE0, 0xB9, 0xFA, 0x8E }
};
return _GetKnownFolderFolderPath(CSIDL_PROGRAM_FILESX86, __FOLDERID_ProgramFilesX86, TRUE, cStrDestW);
}
#endif //_M_X64
HRESULT GetWindowsPath(_Out_ CStringW &cStrDestW)
{
DWORD dwSize, dwLen;
LPWSTR sW;
HRESULT hRes;
for (dwSize = 256; dwSize <= 32768; dwSize <<= 1)
{
if (cStrDestW.EnsureBuffer((SIZE_T)dwSize) == FALSE)
{
cStrDestW.Empty();
return E_OUTOFMEMORY;
}
dwLen = ::GetWindowsDirectoryW((LPWSTR)cStrDestW, dwSize-2);
if (dwLen == 0)
{
hRes = MX_HRESULT_FROM_LASTERROR();
cStrDestW.Empty();
return (FAILED(hRes)) ? hRes : E_FAIL;
}
if (dwLen < dwSize-4)
break;
}
if (dwSize > 32768)
{
cStrDestW.Empty();
return MX_E_BufferOverflow;
}
sW = (LPWSTR)cStrDestW;
if (dwLen == 0 || (sW[dwLen-1] != L'/' && sW[dwLen-1] != L'\\'))
sW[dwLen++] = L'\\';
sW[dwLen] = 0;
cStrDestW.Refresh();
NormalizePath(cStrDestW);
return S_OK;
}
HRESULT GetWindowsSystemPath(_Out_ CStringW &cStrDestW)
{
DWORD dwSize, dwLen;
LPWSTR sW;
HRESULT hRes;
for (dwSize = 256; dwSize <= 32768; dwSize <<= 1)
{
if (cStrDestW.EnsureBuffer((SIZE_T)dwSize) == FALSE)
{
cStrDestW.Empty();
return E_OUTOFMEMORY;
}
dwLen = ::GetSystemDirectoryW((LPWSTR)cStrDestW, dwSize-2);
if (dwLen == 0)
{
hRes = MX_HRESULT_FROM_LASTERROR();
cStrDestW.Empty();
return (FAILED(hRes)) ? hRes : E_FAIL;
}
if (dwLen < dwSize-4)
break;
}
if (dwSize > 32768)
{
cStrDestW.Empty();
return MX_E_BufferOverflow;
}
sW = (LPWSTR)cStrDestW;
if (dwLen == 0 || (sW[dwLen-1] != L'/' && sW[dwLen-1] != L'\\'))
sW[dwLen++] = L'\\';
sW[dwLen] = 0;
cStrDestW.Refresh();
NormalizePath(cStrDestW);
return S_OK;
}
#if defined(_M_X64)
HRESULT GetWindowsSysWow64Path(_Out_ CStringW &cStrDestW)
{
static const GUID __FOLDERID_SystemX86 = {
0xD65231B0, 0xB2F1, 0x4857, { 0xA4, 0xCE, 0xA8, 0xE7, 0xC6, 0xEA, 0x7D, 0x27 }
};
return _GetKnownFolderFolderPath(CSIDL_SYSTEMX86, __FOLDERID_SystemX86, TRUE, cStrDestW);
}
#endif //_M_X64
HRESULT _GetTempPath(_Out_ CStringW &cStrDestW)
{
DWORD dwSize, dwLen;
LPWSTR sW;
HRESULT hRes;
for (dwSize = 256; dwSize <= 32768; dwSize <<= 1)
{
if (cStrDestW.EnsureBuffer((SIZE_T)dwSize) == FALSE)
{
cStrDestW.Empty();
return E_OUTOFMEMORY;
}
dwLen = ::GetTempPathW(dwSize-2, (LPWSTR)cStrDestW);
if (dwLen == 0)
{
hRes = MX_HRESULT_FROM_LASTERROR();
cStrDestW.Empty();
return (FAILED(hRes)) ? hRes : E_FAIL;
}
if (dwLen < dwSize-4)
break;
}
if (dwSize > 32768)
{
cStrDestW.Empty();
return MX_E_BufferOverflow;
}
sW = (LPWSTR)cStrDestW;
if (dwLen == 0 || (sW[dwLen-1] != L'/' && sW[dwLen-1] != L'\\'))
sW[dwLen++] = L'\\';
sW[dwLen] = 0;
cStrDestW.Refresh();
NormalizePath(cStrDestW);
return ConvertToLongPath(cStrDestW);
}
HRESULT CreateDirectoryRecursive(_In_ LPCWSTR szFolderNameW)
{
CStringW cStrTempW;
LARGE_INTEGER liTime;
WCHAR chOrigW, *sW;
SIZE_T i, nOfs;
HRESULT hRes;
if (szFolderNameW == NULL)
return E_POINTER;
if (StrLenW(szFolderNameW) < 3)
return E_INVALIDARG;
if (szFolderNameW[0] != L'\\')
{
if (szFolderNameW[1] != L':' || (szFolderNameW[2] != L'\\' && szFolderNameW[2] != L'/'))
return E_INVALIDARG;
}
else
{
if ((szFolderNameW[0] != L'\\' && szFolderNameW[0] != L'/') ||
(szFolderNameW[1] != L'\\' && szFolderNameW[1] != L'/') ||
szFolderNameW[2] == L'\\' || szFolderNameW[2] == L'/')
{
return E_INVALIDARG;
}
}
if (cStrTempW.Copy(szFolderNameW) == FALSE)
return E_OUTOFMEMORY;
//if the path is NOT a network share, append long path mode
sW = (LPWSTR)cStrTempW;
if (sW[0] != L'\\')
{
if (cStrTempW.Insert(L"\\\\?\\", 0) == FALSE)
return E_OUTOFMEMORY;
sW = (LPWSTR)cStrTempW;
}
if (cStrTempW.GetLength() > 7 && sW[cStrTempW.GetLength()-1] == L'\\')
{
cStrTempW.Delete(cStrTempW.GetLength() - 1, 1);
sW = (LPWSTR)cStrTempW;
}
//first check if the directory can be created directly or already exists
if (::CreateDirectoryW(sW, NULL) != FALSE)
return S_OK;
hRes = MX_HRESULT_FROM_LASTERROR();
if (hRes == MX_HRESULT_FROM_WIN32(ERROR_FILE_EXISTS) || hRes == MX_E_AlreadyExists)
return S_OK;
//skip until \\computer\share\first-folder(\\?) or \\?\drive:\first-folder(\\?)
for (nOfs=0; sW[nOfs] == L'\\'; nOfs++);
//advance until third backslash
for (i=0; sW[nOfs] != 0; nOfs++)
{
if (sW[nOfs] == L'\\')
{
if ((++i) == 3)
break;
}
}
//create each directory
while (sW[nOfs] != 0)
{
while (sW[nOfs] != 0 && sW[nOfs] != L'\\')
nOfs++;
chOrigW = sW[nOfs];
sW[nOfs] = 0;
if (::CreateDirectoryW(sW, NULL) == FALSE)
{
hRes = S_OK;
for (i=CREATE_RETRIES_COUNT; i>0; i--)
{
liTime.QuadPart = -(LONGLONG)MX_MILLISECONDS_TO_100NS(CREATE_RETRIES_DELAY_MS);
::MxNtDelayExecution(FALSE, &liTime);
if (::CreateDirectoryW(sW, NULL) != FALSE)
{
hRes = S_OK;
break;
}
hRes = MX_HRESULT_FROM_LASTERROR();
if (hRes == MX_HRESULT_FROM_WIN32(ERROR_FILE_EXISTS) || hRes == MX_E_AlreadyExists)
{
hRes = S_OK;
break;
}
}
if (FAILED(hRes))
return hRes;
}
sW[nOfs] = chOrigW;
if (chOrigW != 0)
nOfs++;
}
return S_OK;
}
HRESULT RemoveDirectoryRecursive(_In_ LPCWSTR szFolderNameW, _In_opt_ FileRoutines::eDelayedDelete nDD)
{
CStringW cStrTempW;
LARGE_INTEGER liTime;
SIZE_T i, nBaseLen;
HANDLE hFind;
WIN32_FIND_DATAW sFfData;
HRESULT hRes;
if (szFolderNameW == NULL)
return E_POINTER;
if (*szFolderNameW == 0)
return E_INVALIDARG;
//transverse folder
if (cStrTempW.Copy(szFolderNameW) == FALSE)
return E_OUTOFMEMORY;
nBaseLen = cStrTempW.GetLength();
if (nBaseLen == 0)
return E_INVALIDARG;
if (((LPWSTR)cStrTempW)[nBaseLen-1] != L'\\')
{
if (cStrTempW.Concat(L"\\") == FALSE)
return E_OUTOFMEMORY;
nBaseLen++;
}
if (cStrTempW.Concat(L"*") == FALSE)
return E_OUTOFMEMORY;
hFind = ::FindFirstFileW((LPWSTR)cStrTempW, &sFfData);
if (hFind == NULL || hFind == INVALID_HANDLE_VALUE)
{
hRes = MX_HRESULT_FROM_LASTERROR();
return (hRes == MX_E_FileNotFound || hRes == MX_E_PathNotFound) ? S_OK : hRes;
}
do
{
if ((sFfData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0 || sFfData.cFileName[0] != L'.' ||
(sFfData.cFileName[1] != 0 && (sFfData.cFileName[1] != L'.' || sFfData.cFileName[2] != 0)))
{
cStrTempW.Delete(nBaseLen, (SIZE_T)-1);
if (cStrTempW.Concat(sFfData.cFileName) != FALSE)
{
if ((sFfData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0)
hRes = RemoveDirectoryRecursive((LPCWSTR)cStrTempW, nDD);
else
hRes = _DeleteFile((LPCWSTR)cStrTempW, nDD);
}
else
{
hRes = E_OUTOFMEMORY;
}
if (FAILED(hRes))
{
::FindClose(hFind);
return hRes;
}
}
}
while (::FindNextFileW(hFind, &sFfData) != FALSE);
::FindClose(hFind);
//remove directory
cStrTempW.Delete(nBaseLen-1, (SIZE_T)-1); //remove trailing slash
if (nDD == eDelayedDelete::WaitUntilReboot)
{
if (::MoveFileExW((LPCWSTR)cStrTempW, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) == FALSE)
return MX_HRESULT_FROM_LASTERROR();
}
else if (::RemoveDirectoryW((LPWSTR)cStrTempW) == FALSE)
{
::SetFileAttributesW((LPCWSTR)cStrTempW, FILE_ATTRIBUTE_NORMAL|FILE_ATTRIBUTE_DIRECTORY);
for (i = DELETE_RETRIES_COUNT; i > 0; i--)
{
liTime.QuadPart = -(LONGLONG)MX_MILLISECONDS_TO_100NS(DELETE_RETRIES_DELAY_MS);
::MxNtDelayExecution(FALSE, &liTime);
if (::RemoveDirectoryW((LPWSTR)cStrTempW) != FALSE)
break;
hRes = MX_HRESULT_FROM_LASTERROR();
if (hRes == MX_E_FileNotFound || hRes == MX_E_PathNotFound)
break;
if (hRes != MX_HRESULT_FROM_WIN32(ERROR_DIR_NOT_EMPTY) &&
hRes != E_ACCESSDENIED &&
hRes != MX_HRESULT_FROM_WIN32(ERROR_SHARING_VIOLATION) &&
hRes != MX_HRESULT_FROM_WIN32(ERROR_LOCK_VIOLATION))
{
return hRes;
}
if (i == 1)
{
if (nDD == eDelayedDelete::DeleteOnRebootOnFailure)
{
if (::MoveFileExW((LPWSTR)cStrTempW, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) == FALSE)
return MX_HRESULT_FROM_LASTERROR();
break;
}
return hRes;
}
}
}
return S_OK;
}
HRESULT _DeleteFile(_In_ LPCWSTR szFileNameW, _In_opt_ eDelayedDelete nDD)
{
LARGE_INTEGER liTime;
DWORD dw;
HRESULT hRes;
if (szFileNameW == NULL)
return E_POINTER;
if (*szFileNameW == 0)
return E_INVALIDARG;
dw = ::GetFileAttributesW(szFileNameW);
if (dw != INVALID_FILE_ATTRIBUTES && (dw & FILE_ATTRIBUTE_DIRECTORY) != 0)
return S_OK;
if (nDD == eDelayedDelete::WaitUntilReboot)
{
if (::MoveFileExW(szFileNameW, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) == FALSE)
return MX_HRESULT_FROM_LASTERROR();
return S_OK;
}
if (::DeleteFileW(szFileNameW) == FALSE)
{
::SetFileAttributesW(szFileNameW, FILE_ATTRIBUTE_NORMAL);
for (dw = DELETE_RETRIES_COUNT; dw > 0; dw--)
{
liTime.QuadPart = -(LONGLONG)MX_MILLISECONDS_TO_100NS(DELETE_RETRIES_DELAY_MS);
::MxNtDelayExecution(FALSE, &liTime);
if (::DeleteFileW(szFileNameW) != FALSE)
break;
hRes = MX_HRESULT_FROM_LASTERROR();
if (hRes == MX_E_PathNotFound || hRes == MX_E_FileNotFound)
break;
if (hRes != E_ACCESSDENIED && hRes != MX_HRESULT_FROM_WIN32(ERROR_SHARING_VIOLATION) &&
hRes != MX_HRESULT_FROM_WIN32(ERROR_LOCK_VIOLATION))
{
return hRes;
}
if (dw == 1)
{
if (nDD == eDelayedDelete::DeleteOnRebootOnFailure)
{
if (::MoveFileExW(szFileNameW, NULL, MOVEFILE_DELAY_UNTIL_REBOOT) == FALSE)
return MX_HRESULT_FROM_LASTERROR();
break;
}
return hRes;
}
}
}
return S_OK;
}
HRESULT DeleteDirectoryFiles(_In_ LPCWSTR szFolderNameW, _In_opt_ eDelayedDelete nDD)
{
CStringW cStrTempW;
SIZE_T nBaseLen;
HANDLE hFind;
WIN32_FIND_DATAW sFfData;
HRESULT hRes;
if (szFolderNameW == NULL)
return E_POINTER;
if (*szFolderNameW == 0)
return E_INVALIDARG;
//trasverse folder
if (cStrTempW.Copy(szFolderNameW) == FALSE)
return E_OUTOFMEMORY;
nBaseLen = cStrTempW.GetLength();
if (nBaseLen == 0)
return E_INVALIDARG;
if (((LPWSTR)cStrTempW)[nBaseLen - 1] != L'\\')
{
if (cStrTempW.Concat(L"\\") == FALSE)
return E_OUTOFMEMORY;
nBaseLen++;
}
if (cStrTempW.Concat(L"*") == FALSE)
return E_OUTOFMEMORY;
hFind = ::FindFirstFileW((LPWSTR)cStrTempW, &sFfData);
if (hFind == NULL || hFind == INVALID_HANDLE_VALUE)
{
hRes = MX_HRESULT_FROM_LASTERROR();
return (hRes == MX_E_FileNotFound || hRes == MX_E_PathNotFound) ? S_OK : hRes;
}
do
{
if ((sFfData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
{
cStrTempW.Delete(nBaseLen, (SIZE_T)-1);
if (cStrTempW.Concat(sFfData.cFileName) != FALSE)
hRes = _DeleteFile((LPCWSTR)cStrTempW, nDD);
else
hRes = E_OUTOFMEMORY;
if (FAILED(hRes))
{
::FindClose(hFind);
return hRes;
}
}
}
while (::FindNextFileW(hFind, &sFfData) != FALSE);
::FindClose(hFind);
return S_OK;
}
VOID NormalizePath(_Inout_ CStringW &cStrPathW)
{
LPWSTR sW;
SIZE_T i;
sW = (LPWSTR)cStrPathW;
if (sW[0] == L'\\' && sW[1] == L'\\')
sW += 2;
//remove double slashes and convert forward slashes to back slashes
while (*sW != 0)
{
for (i=0; sW[i] == L'/' || sW[i] == L'\\'; i++);
if (i > 0)
{
if (i > 1)
cStrPathW.Delete((SIZE_T)(sW - (LPWSTR)cStrPathW), i-1);
*sW = L'\\';
}
sW++;
}
//remove "." && ".."
sW = (LPWSTR)cStrPathW;
while (*sW != 0)
{
if (sW[0] == L'\\' && sW[1] == L'.')
{
if (sW[2] == L'\\' || sW[2] == 0)
{
//remove "\.\"
i = (SIZE_T)(sW - (LPWSTR)cStrPathW);
cStrPathW.Delete(i, 2);
sW = (LPWSTR)cStrPathW + i;
continue;
}
else if (sW[2] == L'.' && (sW[3] == L'\\' || sW[3] == 0))
{
LPWSTR szStartW, szPrevSlashW;
szStartW = (LPWSTR)cStrPathW;
if (szStartW[0] == L'\\' && szStartW[1] == L'\\')
szStartW += 2;
else if (((szStartW[0] >= L'A' && szStartW[0] <= L'Z') || (szStartW[0] >= L'a' && szStartW[0] <= L'z')) &&
szStartW[1] == L':' && szStartW[2] == L'\\')
szStartW += 3;
szPrevSlashW = sW-1;
while (szPrevSlashW > szStartW && *(szPrevSlashW-1) != L'\\')
szPrevSlashW--;
//remove from szPrevSlashW to sW+4
i = (SIZE_T)(szPrevSlashW - (LPWSTR)cStrPathW);
cStrPathW.Delete(i, (SIZE_T)(sW-szPrevSlashW) + 4);
if (i > 0)
i--;
sW = (LPWSTR)cStrPathW + i;
continue;
}
}
sW++;
}
//convert short path to long if not a network folder
if (((LPCWSTR)cStrPathW)[0] != L'\\')
{
CStringW cStrTempW;
SIZE_T nLen, nSize;
for (nSize = 256; nSize <= 32768 && nSize < cStrTempW.GetLength(); nSize <<= 1);
while (nSize <= 32768)
{
if (cStrTempW.EnsureBuffer(nSize + 4) == FALSE)
break;
nLen = (SIZE_T)::GetLongPathNameW((LPCWSTR)cStrPathW, (LPWSTR)cStrTempW, (DWORD)nSize);
if (nLen == 0)
break; //couldn't convert (i.e. access denied to a parent folder), use original temp path
if (nLen < nSize)
{
((LPWSTR)cStrTempW)[nLen] = 0;
cStrTempW.Refresh();
//----
cStrPathW.Attach(cStrTempW.Detach());
break;
}
nSize <<= 1;
}
}
//done
return;
}
HRESULT ConvertToLongPath(_Inout_ CStringW &cStrPathW)
{
CStringW cStrTempW;
LPCWSTR sW;
SIZE_T i, nStartOfs, nOfs, nPrefixLen = 0;
HANDLE hFindFile;
WIN32_FIND_DATAW sFindDataW;
WCHAR chOrigW;
sW = (LPCWSTR)cStrPathW;
if (sW[0] == L'\\' &&
(sW[1] == L'\\' || sW[1] == L'?') &&
(sW[2] == L'.' || sW[2] == L'?') &&
sW[3] == L'\\')
{
//nt path provided
if ((sW[0] == L'U' || sW[0] == L'u') &&
(sW[1] == L'N' || sW[1] == L'n') &&
(sW[2] == L'C' || sW[2] == L'c') &&
sW[3] == L'\\')
{
return S_OK; //skip network folders
}
if (cStrTempW.Copy(L"\\\\?\\") == FALSE || cStrTempW.Concat(sW+4) == FALSE)
return E_OUTOFMEMORY;
}
else if ((sW[0] >= L'A' && sW[0] <= L'Z') || (sW[0] >= L'a' && sW[0] <= L'z') &&
sW[1] == L':')
{
if (cStrTempW.Copy(L"\\\\?\\") == FALSE || cStrTempW.Concat(sW) == FALSE)
return E_OUTOFMEMORY;
nPrefixLen = 4;
}
else
{
//skip other path types (like network folders)
return S_OK;
}
//look for the fourth backslash as starting offset
sW = (LPCWSTR)cStrTempW;
for (i = nOfs = 0; sW[nOfs] !=0; nOfs++)
{
if (sW[nOfs] == L'\\')
{
if ((++i) == 4)
{
nOfs++;
break;
}
}
}
//process
while (sW[nOfs] != 0)
{
//skip slashes
while (sW[nOfs] == L'\\')
nOfs++;
//advance until component end
nStartOfs = nOfs;
while (sW[nOfs] != 0 && sW[nOfs] != L'\\')
nOfs++;
//find file
if (nOfs > nStartOfs)
{
chOrigW = sW[nOfs];
((LPWSTR)sW)[nOfs] = 0;
hFindFile = ::FindFirstFileW(sW, &sFindDataW);
((LPWSTR)sW)[nOfs] = chOrigW;
if (hFindFile == INVALID_HANDLE_VALUE)
break;
::FindClose(hFindFile);
if (sFindDataW.cFileName[0] != 0)
{
cStrTempW.Delete(nStartOfs, nOfs - nStartOfs);
if (cStrTempW.Insert(sFindDataW.cFileName, nStartOfs) == FALSE)
return E_OUTOFMEMORY;
nOfs = nStartOfs + StrLenW(sFindDataW.cFileName);
sW = (LPCWSTR)cStrTempW;
}
}
}
//done
cStrTempW.Delete(0, nPrefixLen);
cStrPathW.Attach(cStrTempW.Detach());
return S_OK;
}
HRESULT ConvertToNative(_Inout_ CStringW &cStrPathW)
{
CStringW cStrTempW;
LPCWSTR sW;
HRESULT hRes;
sW = (LPCWSTR)cStrPathW;
//try symbolic link path
if (sW[0] == L'\\' &&
(sW[1] == L'\\' || sW[1] == L'?') &&
(sW[2] == L'.' || sW[2] == L'?') &&
sW[3] == L'\\')
{
if (cStrTempW.Format(L"\\??\\%s", sW+4) == FALSE)
return E_OUTOFMEMORY;
hRes = ResolveSymbolicLink(cStrTempW);
if (SUCCEEDED(hRes))
cStrPathW.Attach(cStrTempW.Detach());
return hRes;
}
//try DOS volume/path
if (((sW[0] >= L'A' && sW[0] <= L'Z') || (sW[0] >= L'a' && sW[0] <= L'z')) &&
sW[1] == L':')
{
if (cStrTempW.Format(L"\\??\\%s", sW) == FALSE)
return E_OUTOFMEMORY;
hRes = ResolveSymbolicLink(cStrTempW);
if (SUCCEEDED(hRes))
cStrPathW.Attach(cStrTempW.Detach());
return hRes;
}
//try network paths
if (sW[0] == L'\\' && sW[1] == L'\\')
{
if (cStrPathW.Insert(L"Device\\Mup", 1) == FALSE)
return E_OUTOFMEMORY;
return S_OK;
}
//done
return S_OK;
}
HRESULT ConvertToWin32(_Inout_ CStringW &cStrPathW)
{
CStringW cStrTempW;
MX_PROCESS_DEVICEMAP_INFORMATION sPdmi;
SIZE_T i, nLen;
WCHAR szDriveW[4], szVolumeNameW[512];
LPCWSTR sW;
NTSTATUS nNtStatus;
HRESULT hRes;
//first resolve symlink
sW = (LPCWSTR)cStrPathW;
if (sW[0] == L'\\' &&
(sW[1] == L'\\' || sW[1] == L'?') &&
(sW[2] == L'.' || sW[2] == L'?') &&
sW[3] == L'\\')
{
if (cStrTempW.Format(L"\\??\\%s", sW+4) == FALSE)
return E_OUTOFMEMORY;
hRes = ResolveSymbolicLink(cStrTempW);
if (SUCCEEDED(hRes))
cStrPathW.Attach(cStrTempW.Detach());
}
//network path?
if (StrNCompareW(sW, L"\\Device\\LanmanRedirector\\", 25, TRUE) == 0)
{
cStrPathW.Delete(1, 23);
return S_OK;
}
if (StrNCompareW(sW, L"\\Device\\Mup\\", 12, TRUE) == 0)
{
cStrPathW.Delete(1, 10);
return S_OK;
}
//can convert to DOS volume?
if (StrNCompareW(sW, L"\\Device\\", 8, TRUE) == 0)
{
nNtStatus = ::MxNtQueryInformationProcess(MX_CURRENTPROCESS, MxProcessDeviceMap, &(sPdmi.Query),
(ULONG)sizeof(sPdmi.Query), NULL);
if (!NT_SUCCESS(nNtStatus))
return MX_HRESULT_FROM_WIN32(::MxRtlNtStatusToDosError(nNtStatus));
szDriveW[1] = L':';
szDriveW[2] = 0;
for (i=0; i<26; i++)
{
if ((sPdmi.Query.DriveMap & (1UL << i)) != 0)
{
szDriveW[0] = (WCHAR)(L'A' + i);
nLen = (SIZE_T)::QueryDosDeviceW(szDriveW, szVolumeNameW, MX_ARRAYLEN(szVolumeNameW)-1);
if (nLen > 0)
{
szVolumeNameW[nLen] = 0;
nLen = StrLenW(szVolumeNameW);
if (StrNCompareW(sW, szVolumeNameW, nLen, TRUE) == 0 && (sW[nLen] == 0 || sW[nLen] == L'\\'))
{
//insert drive letter (before deletion to preserve input on error)
i = 2;
if (cStrPathW.GetLength() == 0 || *sW != L'\\')
szDriveW[i++] = L'\\';
if (cStrPathW.InsertN(szDriveW, 0, i) == FALSE)
return E_OUTOFMEMORY;
//delete NT data
cStrPathW.Delete(i, nLen);
break;
}
}
}
}
//if a drive letter was not found, convert "\Device\" to "\\?\"
if (i >= 26)
{
if (cStrPathW.InsertN(L"\\?", 1, 2) == FALSE)
return E_OUTOFMEMORY;
cStrPathW.Delete(3, 6);
}
}
//done
return S_OK;
}
HRESULT DeviceName2DosName(_Inout_ CStringW &cStrPathW)
{
WCHAR szNameW[1024], szDriveW[3], *sW;
DWORD dwDrivesMask;
SIZE_T nNameLen;
HRESULT hRes;
sW = (LPWSTR)cStrPathW;
//try network shares first
if (sW[0] == L'\\')
{
if (StrNCompareW(sW, L"\\Device\\MUP\\", 12, TRUE) == 0)
{
cStrPathW.Delete(1, 10);
return S_OK;
}
if (StrNCompareW(sW, L"\\Device\\LanmanRedirector\\", 25, TRUE) == 0)
{
cStrPathW.Delete(1, 23);
return S_OK;
}
if (StrNCompareW(sW, L"\\\\?\\", 4) == 0 || StrNCompareW(sW, L"\\??\\", 4) == 0)
{
cStrPathW.Delete(0, 4);
}
}
//translate path in device form to drive letters
dwDrivesMask = ::GetLogicalDrives();
szDriveW[1] = L':';
szDriveW[2] = 0;
sW = (LPWSTR)cStrPathW;
hRes = S_OK;
for (szDriveW[0] = L'A'; szDriveW[0] <= L'Z'; szDriveW[0]++, dwDrivesMask >>= 1)