* autoload.cc (GetSystemWindowsDirectoryW): Define.

* kernel32.cc (GetWindowsDirectoryW): Implement to abstract from
	running under Terminal Services or not.
	(GetWindowsDirectoryA): Ditto.

winsup/cygwin/ChangeLog

@@ -1,3 +1,10 @@
+2008-10-22  Corinna Vinschen  <corinna@vinschen.de>
+
+	* autoload.cc (GetSystemWindowsDirectoryW): Define.
+	* kernel32.cc (GetWindowsDirectoryW): Implement to abstract from
+	running under Terminal Services or not.
+	(GetWindowsDirectoryA): Ditto.
+
 2008-10-21  Corinna Vinschen  <corinna@vinschen.de>
 
 	* passwd.cc (pwdgrp::read_passwd): Check if we're called within

winsup/cygwin/autoload.cc

@@ -411,6 +411,7 @@ LoadDLLfuncEx (FindFirstVolumeA, 8, kernel32, 1)
 LoadDLLfuncEx (FindNextVolumeA, 12, kernel32, 1)
 LoadDLLfuncEx (FindVolumeClose, 4, kernel32, 1)
 LoadDLLfuncEx (GetConsoleWindow, 0, kernel32, 1)
+LoadDLLfuncEx (GetSystemWindowsDirectoryW, 8, kernel32, 1)
 LoadDLLfuncEx (GetVolumeNameForVolumeMountPointA, 12, kernel32, 1)
 
 LoadDLLfunc (SHGetDesktopFolder, 4, shell32)

winsup/cygwin/kernel32.cc

@@ -11,6 +11,7 @@ details. */
 #include "winsup.h"
 #include "shared_info.h"
 #include "ntdll.h"
+#include <wchar.h>
 
 /* Implement CreateEvent/OpenEvent so that named objects are always created in
    Cygwin shared object namespace. */
@@ -402,3 +403,37 @@ OpenFileMappingA (DWORD dwDesiredAccess, BOOL bInheritHandle, LPCSTR lpName)
     }
   return OpenFileMappingW (dwDesiredAccess, bInheritHandle, lpName ? name : NULL);
 }
+
+/* When Terminal Services are installed, the GetWindowsDirectory function
+   does not return the system installation dir, but a user specific directory
+   instead.  That's not what we have in mind when calling GetWindowsDirectory
+   from within Cygwin.  So we're calling GetSystemWindowsDirectory from here,
+   except on NT4 where we use the method as described in KB186498. */
+
+#define SYSTEM32	(sizeof ("\\System32") - 1)
+
+UINT WINAPI
+GetWindowsDirectoryW (LPWSTR buf, UINT size)
+{
+  if (wincap.has_terminal_services ())
+    return GetSystemWindowsDirectoryW (buf, size);
+  /* NT4 */
+  WCHAR name [size + SYSTEM32];
+  UINT ret = GetSystemDirectoryW (name, size + SYSTEM32);
+  if (ret < size + SYSTEM32)
+    {
+      name[ret - SYSTEM32] = L'\0';
+      wcscpy (buf, name);
+    }
+  return ret - SYSTEM32;
+}
+
+UINT WINAPI
+GetWindowsDirectoryA (LPSTR buf, UINT size)
+{
+  WCHAR name[MAX_PATH];
+  UINT ret = GetWindowsDirectoryW (name, min (size, MAX_PATH));
+  if (ret < size)
+    sys_wcstombs (buf, size, name);
+  return ret;
+}