Louis Lenders : kernel32: Fix GetTempFileName with invalid path.

[Alexandre Julliard]

Module: wine
Branch: stable
Commit: d7c7c2f43d54c9475e0838e77c1af3b910f0320d
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=d7c7c2f43d54c9475e0838e77c1af3b910f0320d

Author: Louis Lenders <xerox_xerox2000 at yahoo.co.uk>
Date:   Wed Oct 20 20:27:38 2010 +0200

kernel32: Fix GetTempFileName with invalid path.

Found by Oskar Eisemuth.
(cherry picked from commit 8819ae1e66fb0d4181594510431eee7c8d158af0)

---

 dlls/kernel32/path.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/dlls/kernel32/path.c b/dlls/kernel32/path.c
index 0e69f91..6f97b3a 100644
--- a/dlls/kernel32/path.c
+++ b/dlls/kernel32/path.c
@@ -660,6 +660,7 @@ UINT WINAPI GetTempFileNameW( LPCWSTR path, LPCWSTR prefix, UINT unique, LPWSTR
 
     int i;
     LPWSTR p;
+    DWORD attr;
 
     if ( !path || !buffer )
     {
@@ -667,6 +668,15 @@ UINT WINAPI GetTempFileNameW( LPCWSTR path, LPCWSTR prefix, UINT unique, LPWSTR
         return 0;
     }
 
+    /* ensure that the provided directory exists */
+    attr = GetFileAttributesW(path);
+    if (attr == INVALID_FILE_ATTRIBUTES || !(attr & FILE_ATTRIBUTE_DIRECTORY))
+    {
+        TRACE("path not found %s\n", debugstr_w(path));
+        SetLastError( ERROR_DIRECTORY );
+        return 0;
+    }
+
     strcpyW( buffer, path );
     p = buffer + strlenW(buffer);