[pschweitzer] 67355: [KERNEL32] - Halfplement BasepGetComputerNameFromNtPath() which allows querying the computer name given a handle & an NT path - Implement BasepNotifyTrackingService() which iss...
22 Apr
2015
22 Apr
'15
9:20 p.m.
Author: pschweitzer
Date: Wed Apr 22 21:20:35 2015
New Revision: 67355
URL: http://svn.reactos.org/svn/reactos?rev=67355&view=rev
Log:
[KERNEL32]
- Halfplement BasepGetComputerNameFromNtPath() which allows querying the computer name
given a handle & an NT path
- Implement BasepNotifyTrackingService() which issues a FileTrackingInformation on file
move
Modified:
trunk/reactos/dll/win32/kernel32/client/file/move.c
Modified: trunk/reactos/dll/win32/kernel32/client/file/move.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/…
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/file/move.c [iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/file/move.c [iso-8859-1] Wed Apr 22 21:20:35
2015
@@ -178,16 +178,312 @@
/*
- * @unimplemented
+ * @implemented
+ */
+DWORD
+WINAPI
+BasepGetComputerNameFromNtPath(IN PUNICODE_STRING NewPath,
+ IN HANDLE NewHandle,
+ OUT PWSTR ComputerName,
+ IN OUT PULONG ComputerNameLength)
+{
+ BOOL Query = FALSE;
+ WCHAR Letter;
+ PWSTR AbsolutePath, EndOfName;
+ USHORT AbsolutePathLength, NameLength;
+ WCHAR TargetDevice[0x105];
+ WCHAR DeviceName[] = {'A', ':', '\0'}; /* Init to something,
will be set later */
+ UNICODE_STRING UncString = RTL_CONSTANT_STRING(L"\\??\\UNC\\");
+ UNICODE_STRING GlobalString = RTL_CONSTANT_STRING(L"\\??\\");
+
+ DPRINT("BasepGetComputerNameFromNtPath(%wZ, %p, %p, %lu)\n", NewPath,
NewHandle, ComputerName, ComputerNameLength);
+
+ /* If it's an UNC path */
+ if (RtlPrefixUnicodeString(&UncString, NewPath, TRUE))
+ {
+ /* Check for broken caller */
+ if (NewPath->Length <= UncString.Length)
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+
+ /* Skip UNC prefix */
+ AbsolutePath = &NewPath->Buffer[UncString.Length / sizeof(WCHAR)];
+ AbsolutePathLength = NewPath->Length - UncString.Length;
+
+ /* And query DFS */
+ Query = TRUE;
+ }
+ /* Otherwise, we have to be in global (NT path!), with drive letter */
+ else if (RtlPrefixUnicodeString(&GlobalString, NewPath, TRUE) &&
NewPath->Buffer[5] == ':')
+ {
+ /* Path is like that: \??\C:\Complete Path\To File.ext */
+ /* Get the letter and upcase it if required */
+ Letter = NewPath->Buffer[4];
+ if (Letter >= 'a' && Letter <= 'z')
+ {
+ Letter -= ('a' - 'A');
+ }
+ DeviceName[0] = Letter;
+
+ /* Query the associated DOS device */
+ if (!QueryDosDeviceW(DeviceName, TargetDevice, ARRAYSIZE(TargetDevice)))
+ {
+ return GetLastError();
+ }
+
+ /* If that's a network share */
+ if (TargetDevice == wcsstr(TargetDevice,
L"\\Device\\LanmanRedirector\\;"))
+ {
+ /* Path is like that: \Device\LanmanRedirector\;C:0000000000000000\Complete
Path\To File.ext */
+ /* Check we have the correct drive letter */
+ if (TargetDevice[26] == DeviceName[0] &&
+ TargetDevice[27] == ':')
+ {
+ /* Check for the path begin, computer name is before */
+ PWSTR Path = wcschr(&TargetDevice[28], '\\');
+ if (Path == NULL)
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+
+ AbsolutePath = Path + 1;
+ AbsolutePathLength = sizeof(WCHAR) * (ARRAYSIZE(TargetDevice) -
(AbsolutePath - TargetDevice));
+ }
+ else
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+ }
+ /* If it's a local device */
+ else if (TargetDevice == wcsstr(TargetDevice, L"\\Device\\Harddisk")
+ || TargetDevice == wcsstr(TargetDevice, L"\\Device\\CdRom")
+ || TargetDevice == wcsstr(TargetDevice, L"\\Device\\Floppy"))
+ {
+ /* Just query the computer name */
+ if (!GetComputerNameW(ComputerName, ComputerNameLength))
+ {
+ return GetLastError();
+ }
+
+ return ERROR_SUCCESS;
+ }
+ /* If it's a DFS share */
+ else if (TargetDevice == wcsstr(TargetDevice, L"\\Device\\WinDfs\\"))
+ {
+ /* Obviously, query DFS */
+ Query = TRUE;
+ }
+ else
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+ }
+ else
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+
+ /* Query DFS, currently not implemented - shouldn't be missing in ReactOS yet ;-)
*/
+ if (Query)
+ {
+ UNIMPLEMENTED_DBGBREAK("Querying DFS not implemented!\n");
+ AbsolutePath = NULL;
+ AbsolutePathLength = 0;
+ }
+
+ /* Now, properly extract the computer name from the full path */
+ EndOfName = AbsolutePath;
+ if (AbsolutePathLength)
+ {
+ for (NameLength = 0; NameLength < AbsolutePathLength; NameLength +=
sizeof(WCHAR))
+ {
+ /* Look for the next \, it will be the end of computer name */
+ if (EndOfName[0] == '\\')
+ {
+ break;
+ }
+ /* Computer name cannot contain ., if we get to that point, something went
wrong... */
+ else if (EndOfName[0] == '.')
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+
+ ++EndOfName;
+ }
+ }
+
+ NameLength = EndOfName - AbsolutePath;
+ /* Check we didn't overflow and that our computer name isn't ill-formed */
+ if (NameLength >= AbsolutePathLength || NameLength >= MAX_COMPUTERNAME_LENGTH *
sizeof(WCHAR))
+ {
+ return ERROR_BAD_PATHNAME;
+ }
+
+ /* Check we can fit */
+ if (NameLength + sizeof(UNICODE_NULL) > *ComputerNameLength * sizeof(WCHAR))
+ {
+ return ERROR_BUFFER_OVERFLOW;
+ }
+
+ /* Write, zero and done! */
+ RtlCopyMemory(ComputerName, AbsolutePath, NameLength);
+ *ComputerNameLength = NameLength / sizeof(WCHAR);
+ ComputerName[NameLength / sizeof(WCHAR)] = UNICODE_NULL;
+
+ return ERROR_SUCCESS;
+}
+
+
+/*
+ * @implemented
*/
NTSTATUS
WINAPI
-BasepNotifyTrackingService(IN PHANDLE ExistingHandle,
+BasepNotifyTrackingService(IN OUT PHANDLE ExistingHandle,
IN POBJECT_ATTRIBUTES ObjectAttributes,
IN HANDLE NewHandle,
IN PUNICODE_STRING NewPath)
{
- return STATUS_NOT_IMPLEMENTED;
+ NTSTATUS Status;
+ ULONG ComputerNameLength, FileAttributes;
+ WCHAR ComputerName[MAX_COMPUTERNAME_LENGTH + 1];
+ OEM_STRING ComputerNameStringA;
+ CHAR ComputerNameStringBuffer[0x105];
+ UNICODE_STRING ComputerNameStringW;
+ IO_STATUS_BLOCK IoStatusBlock;
+ FILE_BASIC_INFORMATION FileBasicInfo;
+ HANDLE hFullWrite;
+ struct
+ {
+ FILE_TRACKING_INFORMATION;
+ CHAR Buffer[(MAX_COMPUTERNAME_LENGTH + 1) * sizeof(WCHAR)];
+ } FileTrackingInfo;
+
+ DPRINT("BasepNotifyTrackingService(%p, %p, %p, %wZ)\n", *ExistingHandle,
ObjectAttributes, NewHandle, NewPath);
+
+ Status = STATUS_SUCCESS;
+ ComputerNameLength = ARRAYSIZE(ComputerName);
+
+ /* Attempt to get computer name of target handle */
+ if (BasepGetComputerNameFromNtPath(NewPath, NewHandle, ComputerName,
&ComputerNameLength))
+ {
+ /* If we failed to get it, we will just notify with the handle */
+ FileTrackingInfo.ObjectInformationLength = 0;
+ }
+ else
+ {
+ /* Convert the retrieved computer name to ANSI and attach it to the notification
*/
+ ComputerNameStringA.Length = 0;
+ ComputerNameStringA.MaximumLength = ARRAYSIZE(ComputerNameStringBuffer);
+ ComputerNameStringA.Buffer = ComputerNameStringBuffer;
+
+ RtlInitUnicodeString(&ComputerNameStringW, ComputerName);
+ Status = RtlUnicodeStringToOemString(&ComputerNameStringA,
&ComputerNameStringW, 0);
+ if (!NT_SUCCESS(Status))
+ {
+ return Status;
+ }
+
+ RtlCopyMemory(FileTrackingInfo.ObjectInformation, ComputerNameStringA.Buffer,
ComputerNameStringA.Length);
+ FileTrackingInfo.ObjectInformation[ComputerNameStringA.Length] = 0;
+ FileTrackingInfo.ObjectInformationLength = ComputerNameStringA.Length + 1;
+ }
+
+ /* Attach the handle we moved */
+ FileTrackingInfo.DestinationFile = NewHandle;
+
+ /* Final, notify */
+ Status = NtSetInformationFile(*ExistingHandle,
+ &IoStatusBlock,
+ &FileTrackingInfo,
+ sizeof(FileTrackingInfo),
+ FileTrackingInformation);
+ if (Status != STATUS_ACCESS_DENIED)
+ {
+ return Status;
+ }
+
+ /* If we get here, we got access denied error, this comes from a
+ * read-only flag. So, close the file, in order to reopen it with enough
+ * rights to remove said flag and reattempt notification
+ */
+ CloseHandle(*ExistingHandle);
+
+ /* Reopen it, to be able to change the destination file attributes */
+ Status = NtOpenFile(ExistingHandle,
+ SYNCHRONIZE | FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES,
+ ObjectAttributes,
+ &IoStatusBlock,
+ FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+ FILE_SYNCHRONOUS_IO_NONALERT);
+ if (!NT_SUCCESS(Status))
+ {
+ *ExistingHandle = INVALID_HANDLE_VALUE;
+ return Status;
+ }
+
+ /* Get the file attributes */
+ Status = NtQueryInformationFile(*ExistingHandle,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof(FileBasicInfo),
+ FileBasicInformation);
+ if (!NT_SUCCESS(Status))
+ {
+ return Status;
+ }
+
+ /* Get rid of the read only flag */
+ FileAttributes = FileBasicInfo.FileAttributes & ~FILE_ATTRIBUTE_READONLY;
+ RtlZeroMemory(&FileBasicInfo, sizeof(FileBasicInfo));
+ FileBasicInfo.FileAttributes = FileAttributes;
+
+ /* Attempt... */
+ Status = NtSetInformationFile(*ExistingHandle,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof(FileBasicInfo),
+ FileBasicInformation);
+ if (!NT_SUCCESS(Status))
+ {
+ return Status;
+ }
+
+ /* Now, reopen with maximum accesses to notify */
+ Status = NtOpenFile(&hFullWrite,
+ GENERIC_WRITE | SYNCHRONIZE,
+ ObjectAttributes,
+ &IoStatusBlock,
+ FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
+ FILE_SYNCHRONOUS_IO_NONALERT);
+ if (NT_SUCCESS(Status))
+ {
+ NtClose(*ExistingHandle);
+ *ExistingHandle = hFullWrite;
+
+ /* Full success, notify! */
+ Status = NtSetInformationFile(*ExistingHandle,
+ &IoStatusBlock,
+ &FileTrackingInfo,
+ sizeof(FileTrackingInfo),
+ FileTrackingInformation);
+ }
+
+ /* If opening with full access failed or if notify failed, restore read-only */
+ if (!NT_SUCCESS(Status))
+ {
+ FileBasicInfo.FileAttributes |= FILE_ATTRIBUTE_READONLY;
+
+ Status = NtSetInformationFile(*ExistingHandle,
+ &IoStatusBlock,
+ &FileBasicInfo,
+ sizeof(FileBasicInfo),
+ FileBasicInformation);
+ }
+
+ /* We're done */
+ return Status;
}
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