[jgardou] 62019: [KERNEL32] - Use current directory for NULL parameter in GetDriveType Patch by Kenneth Deane (kde678 __AT__ gmail __DOT__ com), slightly modified by myself. Thanks!

Author: jgardou
Date: Thu Feb  6 22:10:44 2014
New Revision: 62019

URL: http://svn.reactos.org/svn/reactos?rev=62019&view=rev
Log:
[KERNEL32]
 - Use current directory for NULL parameter in GetDriveType
Patch by Kenneth Deane (kde678 __AT__ gmail __DOT__ com), slightly modified by myself. Thanks!

Modified:
    trunk/reactos/dll/win32/kernel32/client/file/disk.c

Modified: trunk/reactos/dll/win32/kernel32/client/file/disk.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/f...
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/file/disk.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/file/disk.c	[iso-8859-1] Thu Feb  6 22:10:44 2014
@@ -360,6 +360,9 @@
 {
    PWCHAR RootPathNameW;

+   if (!lpRootPathName)
+       return GetDriveTypeW(NULL);
+
    if (!(RootPathNameW = FilenameA2W(lpRootPathName, FALSE)))
       return DRIVE_UNKNOWN;

@@ -373,13 +376,31 @@
 WINAPI
 GetDriveTypeW(IN LPCWSTR lpRootPathName)
 {
-	FILE_FS_DEVICE_INFORMATION FileFsDevice;
-	IO_STATUS_BLOCK IoStatusBlock;
-
-	HANDLE hFile;
-	NTSTATUS errCode;
-
-	hFile = InternalOpenDirW(lpRootPathName, FALSE);
+    FILE_FS_DEVICE_INFORMATION FileFsDevice;
+    IO_STATUS_BLOCK IoStatusBlock;
+    HANDLE hFile;
+    NTSTATUS errCode;
+
+    if (!lpRootPathName)
+    {
+        /* If NULL is passed, use current directory path */
+        DWORD BufferSize = GetCurrentDirectoryW(0, NULL);
+        LPWSTR CurrentDir = HeapAlloc(GetProcessHeap(), 0, BufferSize * sizeof(WCHAR));
+        if (!CurrentDir)
+            return DRIVE_UNKNOWN;
+        if (!GetCurrentDirectoryW(BufferSize, CurrentDir))
+        {
+            HeapFree(GetProcessHeap(), 0, CurrentDir);
+            return DRIVE_UNKNOWN;
+        }
+        hFile = InternalOpenDirW(CurrentDir, FALSE);
+        HeapFree(GetProcessHeap(), 0, CurrentDir);
+    }
+    else
+    {
+        hFile = InternalOpenDirW(lpRootPathName, FALSE);
+    }
+
    if (hFile == INVALID_HANDLE_VALUE)
    {
        return DRIVE_NO_ROOT_DIR;	/* According to WINE regression tests */