[hpoussin] 29846: Better check of GetWindowsDirectory() return value

Author: hpoussin
Date: Wed Oct 24 11:49:40 2007
New Revision: 29846

URL: http://svn.reactos.org/svn/reactos?rev=29846&view=rev
Log:
Better check of GetWindowsDirectory() return value

Modified:
    trunk/reactos/dll/win32/msgina/msgina.c

Modified: trunk/reactos/dll/win32/msgina/msgina.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/msgina/msgina.c?…
==============================================================================
--- trunk/reactos/dll/win32/msgina/msgina.c (original)
+++ trunk/reactos/dll/win32/msgina/msgina.c Wed Oct 24 11:49:40 2007
@@ -207,6 +207,13 @@
 	UINT len;
 	BOOL ret;
 
+	len = GetWindowsDirectoryW(CurrentDirectory, MAX_PATH);
+	if (len == 0 || len > MAX_PATH)
+	{
+		WARN("GetWindowsDirectoryW() failed\n");
+		return FALSE;
+	}
+
 	ret = DuplicateTokenEx(pgContext->UserToken, MAXIMUM_ALLOWED, NULL,
SecurityImpersonation, TokenPrimary, &hAppToken);
 	if (!ret)
 	{
@@ -222,13 +229,6 @@
 	StartupInfo.wShowWindow = SW_SHOW;
 	StartupInfo.lpDesktop = pszDesktopName;
 
-	len = GetWindowsDirectoryW(CurrentDirectory, MAX_PATH);
-	if (len > MAX_PATH)
-	{
-		WARN("GetWindowsDirectoryW() failed\n");
-		CloseHandle(hAppToken);
-		return FALSE;
-	}
 	ret = CreateProcessAsUserW(
 		hAppToken,
 		pszCmdLine,