[weiden] 27634: Rewrite parts of FindFirstFileEx to: - Fix searches relative to the current directory using the features RtlDosPathNameToNtPathName_U provides instead of hacking around them - Enable searches for fake DOS devices. Some installers like NSIS use this feature to determine if a drive exists, this works now.
13 Jul
2007
13 Jul
'07
7:43 p.m.
Author: weiden
Date: Fri Jul 13 23:43:09 2007
New Revision: 27634
URL: http://svn.reactos.org/svn/reactos?rev=27634&view=rev
Log:
Rewrite parts of FindFirstFileEx to:
- Fix searches relative to the current directory using the features
RtlDosPathNameToNtPathName_U provides instead of hacking around them
- Enable searches for fake DOS devices. Some installers like NSIS use this feature to
determine if a drive exists, this works now.
Modified:
trunk/reactos/dll/win32/kernel32/file/find.c
Modified: trunk/reactos/dll/win32/kernel32/file/find.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/file/fi…
==============================================================================
--- trunk/reactos/dll/win32/kernel32/file/find.c (original)
+++ trunk/reactos/dll/win32/kernel32/file/find.c Fri Jul 13 23:43:09 2007
@@ -21,6 +21,8 @@
#define FIND_DATA_SIZE (16*1024)
+#define FIND_DEVICE_HANDLE ((HANDLE)0x1)
+
typedef struct _KERNEL32_FIND_FILE_DATA
{
HANDLE DirectoryHandle;
@@ -48,6 +50,61 @@
/* FUNCTIONS ****************************************************************/
+
+HANDLE
+InternalCopyDeviceFindDataW(LPWIN32_FIND_DATAW lpFindFileData,
+ LPCWSTR lpFileName,
+ ULONG DeviceNameInfo)
+{
+ UNICODE_STRING DeviceName;
+
+ DeviceName.Length = DeviceName.MaximumLength = (USHORT)(DeviceNameInfo &
0xFFFF);
+ DeviceName.Buffer = (LPWSTR)((ULONG_PTR)lpFileName + (DeviceNameInfo >> 16));
+
+ /* Return the data */
+ RtlZeroMemory(lpFindFileData,
+ sizeof(*lpFindFileData));
+ lpFindFileData->dwFileAttributes = FILE_ATTRIBUTE_ARCHIVE;
+ RtlCopyMemory(lpFindFileData->cFileName,
+ DeviceName.Buffer,
+ DeviceName.Length);
+
+ return FIND_DEVICE_HANDLE;
+}
+
+HANDLE
+InternalCopyDeviceFindDataA(LPWIN32_FIND_DATAA lpFindFileData,
+ PUNICODE_STRING FileName,
+ ULONG DeviceNameInfo)
+{
+ UNICODE_STRING DeviceName;
+ ANSI_STRING BufferA;
+ CHAR Buffer[MAX_PATH];
+
+ DeviceName.Length = DeviceName.MaximumLength = (USHORT)(DeviceNameInfo &
0xFFFF);
+ DeviceName.Buffer = (LPWSTR)((ULONG_PTR)FileName->Buffer + (DeviceNameInfo
>> 16));
+
+ BufferA.MaximumLength = sizeof(Buffer) - sizeof(Buffer[0]);
+ BufferA.Buffer = Buffer;
+ if (bIsFileApiAnsi)
+ RtlUnicodeStringToAnsiString (&BufferA, &DeviceName, FALSE);
+ else
+ RtlUnicodeStringToOemString (&BufferA, &DeviceName, FALSE);
+
+ /* NOTE: Free the string before we try to write the results to the caller,
+ this way we prevent a memory leak in case of a fault... */
+ RtlFreeUnicodeString(FileName);
+
+ /* Return the data */
+ RtlZeroMemory(lpFindFileData,
+ sizeof(*lpFindFileData));
+ lpFindFileData->dwFileAttributes = FILE_ATTRIBUTE_ARCHIVE;
+ RtlCopyMemory(lpFindFileData->cFileName,
+ BufferA.Buffer,
+ BufferA.Length);
+
+ return FIND_DEVICE_HANDLE;
+}
VOID
InternalCopyFindDataW(LPWIN32_FIND_DATAW lpFindFileData,
@@ -142,6 +199,12 @@
NTSTATUS Status;
DPRINT("InternalFindNextFile(%lx)\n", hFindFile);
+
+ if (hFindFile == FIND_DEVICE_HANDLE)
+ {
+ SetLastError (ERROR_NO_MORE_FILES);
+ return FALSE;
+ }
IHeader = (PKERNEL32_FIND_DATA_HEADER)hFindFile;
if (hFindFile == NULL || hFindFile == INVALID_HANDLE_VALUE ||
@@ -196,214 +259,185 @@
HANDLE
STDCALL
InternalFindFirstFile (
- LPCWSTR lpFileName,
- BOOLEAN DirectoryOnly
+ LPCWSTR lpFileName,
+ BOOLEAN DirectoryOnly,
+ PULONG DeviceNameInfo
)
{
OBJECT_ATTRIBUTES ObjectAttributes;
PKERNEL32_FIND_DATA_HEADER IHeader;
PKERNEL32_FIND_FILE_DATA IData;
IO_STATUS_BLOCK IoStatusBlock;
- UNICODE_STRING NtPathU;
- UNICODE_STRING PatternStr = RTL_CONSTANT_STRING(L"*");
+ UNICODE_STRING NtPathU, FileName, PathFileName;
NTSTATUS Status;
- PWSTR e1, e2;
- WCHAR CurrentDir[256];
- PWCHAR SlashlessFileName;
- PWSTR SearchPath;
- PWCHAR SearchPattern;
- ULONG Length;
+ PWSTR NtPathBuffer;
+ BOOLEAN RemovedSlash = FALSE;
BOOL bResult;
+ CURDIR DirInfo;
+ HANDLE hDirectory = NULL;
DPRINT("FindFirstFileW(lpFileName %S)\n",
lpFileName);
- Length = wcslen(lpFileName);
- if (L'\\' == lpFileName[Length - 1])
- {
- SlashlessFileName = RtlAllocateHeap(hProcessHeap,
- 0,
- Length * sizeof(WCHAR));
- if (NULL == SlashlessFileName)
+ *DeviceNameInfo = 0;
+ RtlZeroMemory(&PathFileName,
+ sizeof(PathFileName));
+ RtlInitUnicodeString(&FileName,
+ lpFileName);
+
+ bResult = RtlDosPathNameToNtPathName_U (lpFileName,
+ &NtPathU,
+ (PCWSTR
*)((ULONG_PTR)&PathFileName.Buffer),
+ &DirInfo);
+ if (FALSE == bResult)
+ {
+ SetLastError(ERROR_PATH_NOT_FOUND);
+ return NULL;
+ }
+
+ /* Save the buffer pointer for later, we need to free it! */
+ NtPathBuffer = NtPathU.Buffer;
+
+ /* If there is a file name/pattern then determine it's length */
+ if (PathFileName.Buffer != NULL)
+ {
+ PathFileName.Length = NtPathU.Length -
+ (USHORT)((ULONG_PTR)PathFileName.Buffer - (ULONG_PTR)NtPathU.Buffer);
+ }
+ PathFileName.MaximumLength = PathFileName.Length;
+
+ if (DirInfo.DosPath.Length != 0 && DirInfo.DosPath.Buffer !=
PathFileName.Buffer)
+ {
+ if (PathFileName.Buffer != NULL)
{
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- return NULL;
+ /* This is a relative path to DirInfo.Handle, adjust NtPathU! */
+ NtPathU.Length = NtPathU.MaximumLength =
+ (USHORT)((ULONG_PTR)PathFileName.Buffer -
(ULONG_PTR)DirInfo.DosPath.Buffer);
+ NtPathU.Buffer = DirInfo.DosPath.Buffer;
}
- memcpy(SlashlessFileName, lpFileName, (Length - 1) * sizeof(WCHAR));
- SlashlessFileName[Length - 1] = L'\0';
- lpFileName = SlashlessFileName;
}
else
{
- SlashlessFileName = NULL;
- }
-
- e1 = wcsrchr(lpFileName, L'/');
- e2 = wcsrchr(lpFileName, L'\\');
- SearchPattern = max(e1, e2);
- SearchPath = CurrentDir;
-
- if (NULL == SearchPattern)
- {
- CHECKPOINT;
- SearchPattern = (PWCHAR)lpFileName;
- Length = GetCurrentDirectoryW(sizeof(CurrentDir) / sizeof(WCHAR),
SearchPath);
- if (0 == Length)
- {
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- return NULL;
- }
- if (Length > sizeof(CurrentDir) / sizeof(WCHAR))
- {
- SearchPath = RtlAllocateHeap(hProcessHeap,
- HEAP_ZERO_MEMORY,
- Length * sizeof(WCHAR));
- if (NULL == SearchPath)
- {
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- return NULL;
- }
- GetCurrentDirectoryW(Length, SearchPath);
- }
- }
- else
- {
- CHECKPOINT;
- SearchPattern++;
- Length = SearchPattern - lpFileName;
- if (Length + 1 > sizeof(CurrentDir) / sizeof(WCHAR))
- {
- SearchPath = RtlAllocateHeap(hProcessHeap,
- HEAP_ZERO_MEMORY,
- (Length + 1) * sizeof(WCHAR));
- if (NULL == SearchPath)
- {
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- return NULL;
- }
- }
- memcpy(SearchPath, lpFileName, Length * sizeof(WCHAR));
- SearchPath[Length] = 0;
- }
-
- bResult = RtlDosPathNameToNtPathName_U (SearchPath,
- &NtPathU,
- NULL,
- NULL);
- if (SearchPath != CurrentDir)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SearchPath);
- }
- if (FALSE == bResult)
- {
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- return NULL;
- }
-
- DPRINT("NtPathU \'%S\'\n", NtPathU.Buffer);
-
- IHeader = RtlAllocateHeap (hProcessHeap,
- HEAP_ZERO_MEMORY,
- sizeof(KERNEL32_FIND_DATA_HEADER) +
- sizeof(KERNEL32_FIND_FILE_DATA) + FIND_DATA_SIZE);
- if (NULL == IHeader)
- {
- RtlFreeHeap (hProcessHeap,
- 0,
- NtPathU.Buffer);
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- SetLastError(ERROR_NOT_ENOUGH_MEMORY);
- return NULL;
- }
-
- IHeader->Type = FileFind;
- IData = (PKERNEL32_FIND_FILE_DATA)(IHeader + 1);
-
- /* change pattern: "*.*" --> "*" */
- if (wcscmp (SearchPattern, L"*.*"))
- {
- RtlInitUnicodeString(&PatternStr, SearchPattern);
- }
-
- DPRINT("NtPathU \'%S\' Pattern \'%S\'\n",
- NtPathU.Buffer, PatternStr.Buffer);
+ /* This is an absolute path, NtPathU receives the full path */
+ DirInfo.Handle = NULL;
+ if (PathFileName.Buffer != NULL)
+ {
+ NtPathU.Length = NtPathU.MaximumLength =
+ (USHORT)((ULONG_PTR)PathFileName.Buffer - (ULONG_PTR)NtPathU.Buffer);
+ }
+ }
+
+ /* Remove a trailing backslash from the path, unless it's a DOS drive directly */
+ if (NtPathU.Length > 3 * sizeof(WCHAR) &&
+ NtPathU.Buffer[(NtPathU.Length / sizeof(WCHAR)) - 2] != L':' &&
+ NtPathU.Buffer[(NtPathU.Length / sizeof(WCHAR)) - 1] != L'\\')
+ {
+ NtPathU.Length -= sizeof(WCHAR);
+ RemovedSlash = TRUE;
+ }
+
+ DPRINT("lpFileName: \"%ws\"\n", lpFileName);
+ DPRINT("NtPathU: \"%wZ\"\n", &NtPathU);
+ DPRINT("PathFileName: \"%wZ\"\n", &PathFileName);
+ DPRINT("RelativeTo: 0x%p\n", DirInfo.Handle);
InitializeObjectAttributes (&ObjectAttributes,
&NtPathU,
- 0,
- NULL,
+ OBJ_CASE_INSENSITIVE,
+ DirInfo.Handle,
NULL);
- Status = NtOpenFile (&IData->DirectoryHandle,
+ Status = NtOpenFile (&hDirectory,
FILE_LIST_DIRECTORY,
&ObjectAttributes,
&IoStatusBlock,
FILE_SHARE_READ|FILE_SHARE_WRITE,
FILE_DIRECTORY_FILE);
+ if (!NT_SUCCESS(Status) && RemovedSlash)
+ {
+ /* Try again, this time with the trailing slash... */
+ NtPathU.Length -= sizeof(WCHAR);
+
+ Status = NtOpenFile (&hDirectory,
+ FILE_LIST_DIRECTORY,
+ &ObjectAttributes,
+ &IoStatusBlock,
+ FILE_SHARE_READ|FILE_SHARE_WRITE,
+ FILE_DIRECTORY_FILE);
+
+ NtPathU.Length -= sizeof(WCHAR);
+ }
+
+ if (!NT_SUCCESS(Status))
+ {
+ RtlFreeHeap (hProcessHeap,
+ 0,
+ NtPathBuffer);
+
+ /* See if the application tries to look for a DOS device */
+ *DeviceNameInfo = RtlIsDosDeviceName_U((PWSTR)((ULONG_PTR)lpFileName));
+ if (*DeviceNameInfo != 0)
+ return FIND_DEVICE_HANDLE;
+
+ SetLastErrorByStatus (Status);
+ return(NULL);
+ }
+
+ if (PathFileName.Length == 0)
+ {
+ /* No file part?! */
+ NtClose(hDirectory);
+ RtlFreeHeap (hProcessHeap,
+ 0,
+ NtPathBuffer);
+ SetLastError(ERROR_FILE_NOT_FOUND);
+ return NULL;
+ }
+
+ IHeader = RtlAllocateHeap (hProcessHeap,
+ HEAP_ZERO_MEMORY,
+ sizeof(KERNEL32_FIND_DATA_HEADER) +
+ sizeof(KERNEL32_FIND_FILE_DATA) + FIND_DATA_SIZE);
+ if (NULL == IHeader)
+ {
+ RtlFreeHeap (hProcessHeap,
+ 0,
+ NtPathBuffer);
+ NtClose(hDirectory);
+
+ SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ return NULL;
+ }
+
+ IHeader->Type = FileFind;
+ IData = (PKERNEL32_FIND_FILE_DATA)(IHeader + 1);
+ IData->DirectoryHandle = hDirectory;
+
+ /* change pattern: "*.*" --> "*" */
+ if (PathFileName.Length == 6 &&
+ RtlCompareMemory(PathFileName.Buffer,
+ L"*.*",
+ 6) == 6)
+ {
+ PathFileName.Length = 2;
+ }
+
+ IData->pFileInfo = (PVOID)((ULONG_PTR)IData + sizeof(KERNEL32_FIND_FILE_DATA));
+ IData->pFileInfo->FileIndex = 0;
+ IData->DirectoryOnly = DirectoryOnly;
+
+ bResult = InternalFindNextFile((HANDLE)IHeader, &PathFileName);
+
RtlFreeHeap (hProcessHeap,
0,
- NtPathU.Buffer);
-
- if (!NT_SUCCESS(Status))
- {
- RtlFreeHeap (hProcessHeap, 0, IHeader);
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
- SetLastErrorByStatus (Status);
- return(NULL);
- }
- IData->pFileInfo = (PVOID)((ULONG_PTR)IData + sizeof(KERNEL32_FIND_FILE_DATA));
- IData->pFileInfo->FileIndex = 0;
- IData->DirectoryOnly = DirectoryOnly;
-
- bResult = InternalFindNextFile((HANDLE)IHeader, &PatternStr);
- if (NULL != SlashlessFileName)
- {
- RtlFreeHeap(hProcessHeap,
- 0,
- SlashlessFileName);
- }
-
- if (!bResult)
- {
- FindClose((HANDLE)IHeader);
- return NULL;
- }
+ NtPathBuffer);
+
+ if (!bResult)
+ {
+ FindClose((HANDLE)IHeader);
+ return NULL;
+ }
return (HANDLE)IHeader;
}
@@ -423,6 +457,7 @@
PKERNEL32_FIND_FILE_DATA IData;
UNICODE_STRING FileNameU;
ANSI_STRING FileName;
+ ULONG DeviceNameInfo;
RtlInitAnsiString (&FileName,
(LPSTR)lpFileName);
@@ -437,15 +472,22 @@
&FileName,
TRUE);
- IHeader = InternalFindFirstFile (FileNameU.Buffer, FALSE);
-
- RtlFreeUnicodeString (&FileNameU);
+ IHeader = InternalFindFirstFile (FileNameU.Buffer, FALSE, &DeviceNameInfo);
if (IHeader == NULL)
{
+ RtlFreeUnicodeString (&FileNameU);
DPRINT("Failing request\n");
return INVALID_HANDLE_VALUE;
}
+
+ if ((HANDLE)IHeader == FIND_DEVICE_HANDLE)
+ {
+ /* NOTE: FileNameU will be freed in InternalCopyDeviceFindDataA */
+ return InternalCopyDeviceFindDataA(lpFindFileData, &FileNameU, DeviceNameInfo);
+ }
+
+ RtlFreeUnicodeString (&FileNameU);
IData = (PKERNEL32_FIND_FILE_DATA)(IHeader + 1);
@@ -501,6 +543,9 @@
PKERNEL32_FIND_DATA_HEADER IHeader;
DPRINT("FindClose(hFindFile %x)\n",hFindFile);
+
+ if (hFindFile == FIND_DEVICE_HANDLE)
+ return TRUE;
if (!hFindFile || hFindFile == INVALID_HANDLE_VALUE)
{
@@ -600,6 +645,7 @@
{
PKERNEL32_FIND_DATA_HEADER IHeader;
PKERNEL32_FIND_FILE_DATA IData;
+ ULONG DeviceNameInfo;
if (fInfoLevelId != FindExInfoStandard)
{
@@ -614,12 +660,15 @@
return INVALID_HANDLE_VALUE;
}
- IHeader = InternalFindFirstFile (lpFileName, fSearchOp ==
FindExSearchLimitToDirectories ? TRUE : FALSE);
- if (IHeader == NULL)
- {
- DPRINT("Failing request\n");
- return INVALID_HANDLE_VALUE;
- }
+ IHeader = InternalFindFirstFile (lpFileName, fSearchOp ==
FindExSearchLimitToDirectories ? TRUE : FALSE, &DeviceNameInfo);
+ if (IHeader == NULL)
+ {
+ DPRINT("Failing request\n");
+ return INVALID_HANDLE_VALUE;
+ }
+
+ if ((HANDLE)IHeader == FIND_DEVICE_HANDLE)
+ return InternalCopyDeviceFindDataW((LPWIN32_FIND_DATAW)lpFindFileData,
lpFileName, DeviceNameInfo);
IData = (PKERNEL32_FIND_FILE_DATA)(IHeader + 1);
@@ -650,6 +699,7 @@
PKERNEL32_FIND_FILE_DATA IData;
UNICODE_STRING FileNameU;
ANSI_STRING FileNameA;
+ ULONG DeviceNameInfo;
if (fInfoLevelId != FindExInfoStandard)
{
@@ -672,15 +722,22 @@
else
RtlOemStringToUnicodeString (&FileNameU, &FileNameA, TRUE);
- IHeader = InternalFindFirstFile (FileNameU.Buffer, FALSE);
-
- RtlFreeUnicodeString (&FileNameU);
+ IHeader = InternalFindFirstFile (FileNameU.Buffer, FALSE, &DeviceNameInfo);
if (IHeader == NULL)
{
+ RtlFreeUnicodeString (&FileNameU);
DPRINT("Failing request\n");
return INVALID_HANDLE_VALUE;
}
+
+ if ((HANDLE)IHeader == FIND_DEVICE_HANDLE)
+ {
+ /* NOTE: FileNameU will be freed in InternalCopyDeviceFindDataA */
+ return InternalCopyDeviceFindDataA(lpFindFileData, &FileNameU, DeviceNameInfo);
+ }
+
+ RtlFreeUnicodeString (&FileNameU);
IData = (PKERNEL32_FIND_FILE_DATA)(IHeader + 1);
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