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NTSTATUS
IoGetDeviceObjectPointer(
IN PUNICODE_STRING ObjectName,
IN ACCESS_MASK DesiredAccess,
OUT PFILE_OBJECT *FileObject,
OUT PDEVICE_OBJECT *DeviceObject
)
{
PFILE_OBJECT fileObject;
OBJECT_ATTRIBUTES objectAttributes;
HANDLE fileHandle;
IO_STATUS_BLOCK ioStatus;
NTSTATUS status;
PAGED_CODE();
InitializeObjectAttributes( &objectAttributes,
ObjectName,
0,
(HANDLE) NULL,
(PSECURITY_DESCRIPTOR) NULL );
status = ZwOpenFile( &fileHandle,
DesiredAccess,
&objectAttributes,
&ioStatus,
0,
FILE_NON_DIRECTORY_FILE );
if (NT_SUCCESS( status )) {
status = ObReferenceObjectByHandle( fileHandle,
0,
IoFileObjectType,
KernelMode,
(PVOID *) &fileObject,
NULL );
if (NT_SUCCESS( status )) {
*FileObject = fileObject;
*DeviceObject = IoGetRelatedDeviceObject( fileObject );
}
(VOID) ZwClose( fileHandle );
}
return status;
}