[PATCH v6 1/2] kernelbase: Workaound for SetCurrentDirectoryW misuse

[Lois Gomez]

From: Lois Gomez

---
 dlls/ntdll/path.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/dlls/ntdll/path.c b/dlls/ntdll/path.c
index 8956ff07f6c..452fc5cfa84 100644
--- a/dlls/ntdll/path.c
+++ b/dlls/ntdll/path.c
@@ -966,6 +966,15 @@ NTSTATUS WINAPI RtlSetCurrentDirectory_U(const UNICODE_STRING* dir)
     ptr = newdir.Buffer;
     ptr += 4;  /* skip ??\ prefix */
     size -= 4;
+
+    /* remove trailing '.' if present */
+    if (size && ptr[size - 1] == '.' &&
+        (size == 1 || ptr[size - 2] == '\')
+        && !(size > 1 && ptr[size - 2] == '.'))
+    {
+        size--;
+    }
+
     if (size && ptr[size - 1] != '\') ptr[size++] = '\';

/* convert ??\UNC\ path to \ prefix */