Run Virtual Me2Me sessions via /etc/X11/Xsession

remoting/tools/me2me_virtual_host.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Virtual Me2Me implementation.  This script runs and manages the processes
 # required for a Virtual Me2Me desktop, which are: X server, X desktop
 # session, and Host process.
 # This script is intended to run continuously as a background daemon
 # process, running under an ordinary (non-root) user account.
@@ skipping 475 matching lines @@
   """
   if XSESSION_COMMAND is not None:
     return XSESSION_COMMAND
 
   # Unity-2d would normally be the preferred choice on Ubuntu 12.04.  At the
   # time of writing, this session does not work properly (missing launcher and
   # panel), so gnome-session-fallback is used in preference.
   # "unity-2d-panel" was chosen here simply because it appears in the TryExec
   # line of the session's .desktop file; other choices might be just as good.
   for test_file, command in [
-    ("/usr/bin/gnome-session-fallback", "/usr/bin/gnome-session-fallback"),
+    ("/usr/bin/gnome-session-fallback",
+      ["/etc/X11/Xsession", "gnome-session-fallback"]),
     ("/etc/gdm/Xsession", "/etc/gdm/Xsession"),

[Sergey Ulanov, 2012/07/31 18:50:42]

pretty please: can you also add xfce4-session in the list?

     ("/usr/bin/unity-2d-panel",
-      ["/usr/bin/gnome-session", "--session=ubuntu-2d"]),
+      ["/etc/X11/Xsession", "/usr/bin/gnome-session --session=ubuntu-2d"]),
   ]:
     if os.path.exists(test_file):
       return command
 
   return None
 
 
 def locate_executable(exe_name):
   for path in EXE_PATHS_TO_TRY:
     exe_path = os.path.join(SCRIPT_PATH, path, exe_name)
@@ skipping 337 matching lines @@
         os.remove(host.config_file)
         return 0
       elif os.WEXITSTATUS(status) == 4:
         logging.info("OAuth credentials are invalid - exiting.")
         os.remove(auth.config_file)
         return 0
 
 if __name__ == "__main__":
   logging.basicConfig(level=logging.DEBUG)
   sys.exit(main())