[UDFS]

Fix broken implementation of UDFGetFullNameInformation().
Always return full name length so that caller can allocate a big-enough buffer for later call.

CORE-4375

svn path=/trunk/; revision=74914

diff --git a/reactos/drivers/filesystems/udfs/fileinfo.cpp b/reactos/drivers/filesystems/udfs/fileinfo.cpp
index a4dadde..fa6b3e1 100644 (file)
--- a/reactos/drivers/filesystems/udfs/fileinfo.cpp
+++ b/reactos/drivers/filesystems/udfs/fileinfo.cpp
@@ -831,20 +831,22 @@ UDFGetFullNameInformation(
  IN OUT PLONG                      PtrReturnedLength
     )
 {
  IN OUT PLONG                      PtrReturnedLength
     )
 {

+    ULONG BytesToCopy;

     NTSTATUS RC = STATUS_SUCCESS;
 
 
     AdPrint(("UDFGetFullNameInformation\n"));
 
     PtrBuffer->FileNameLength = FileObject->FileName.Length;
     NTSTATUS RC = STATUS_SUCCESS;
 
 
     AdPrint(("UDFGetFullNameInformation\n"));
 
     PtrBuffer->FileNameLength = FileObject->FileName.Length;

+    BytesToCopy = FileObject->FileName.Length;

 
     if (PtrBuffer->FileNameLength + sizeof( ULONG ) > (ULONG)(*PtrReturnedLength)) {
 
 
     if (PtrBuffer->FileNameLength + sizeof( ULONG ) > (ULONG)(*PtrReturnedLength)) {
 

-        PtrBuffer->FileNameLength = *PtrReturnedLength - sizeof( ULONG );
+        BytesToCopy = *PtrReturnedLength - sizeof( ULONG );

         RC = STATUS_BUFFER_OVERFLOW;
     }
 
         RC = STATUS_BUFFER_OVERFLOW;
     }
 

-    RtlCopyMemory( PtrBuffer->FileName, FileObject->FileName.Buffer, PtrBuffer->FileNameLength );
+    RtlCopyMemory( PtrBuffer->FileName, FileObject->FileName.Buffer, BytesToCopy );

 
     //  Reduce the available bytes by the amount stored into this buffer.
     *PtrReturnedLength -= sizeof( ULONG ) + PtrBuffer->FileNameLength;
 
     //  Reduce the available bytes by the amount stored into this buffer.
     *PtrReturnedLength -= sizeof( ULONG ) + PtrBuffer->FileNameLength;