How to monitor the USB ports of an old IBM T41?

Comments

• mfillpot Posts: 2,180

  September 2010

  It sounds like you are attempting to create a kernel space product like dbus (http://www.freedesktop.org/wiki/Software/dbus#ReferenceImplementation.28dbus-daemonandlibdbus.29), a quick tutorial to using dbus is at http://tuxpool.blogspot.com/2010/04/dbus-tutorial-part-1.html
  
  I would recommend reading the documentation and source code from the latest implementation of dbus and seeing how it speaks to the kernel so you can built a kernel based implementation.

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• BenjaminD Posts: 6

  September 2010

  Hello!
  I'm sorry for the long wait, but I just haven't had a chance to do any programming lately, but now I'm back at it again.
  I really appreciate your link to DBus, and I've chosen to go the Python way (at least for a first try, as the DBus API for Python seems to be the most well documented, and the best for beginners).
  Right now my only problem is that my program seem to exit immediately after I execute it.
  This is what I did:
  First I just did a "sudo apt-get install ..." on the following packages:
  *python-dbus
  *python-wxgtk2.8
  *python-wxglade
  *d-feet
  And they all seem to "install" correctly.
  The sourcecode is as follows:

  import dbus
  from dbus.mainloop.glib import DBusGMainLoop
  
  dbus_loop = DBusGMainLoop()
  bus = dbus.SystemBus(mainloop=dbus_loop)
  
  def device_added_callback(udi):
      print "added"
  
  def device_removed_callback(udi):
      print "removed"
  
  bus.add_signal_receiver(device_added_callback,
                                   "DeviceAdded",
                                   "org.freedesktop.Hal.Manager",
                                   "org.freedesktop.Hal",
                                   "/org/freedesktop/Hal/Manager")
  bus.add_signal_receiver(device_removed_callback,
                                   "DeviceRemoved",
                                   "org.freedesktop.Hal.Manager",
                                   "org.freedesktop.Hal",
                                   "/org/freedesktop/Hal/Manager")
  

  When I save it and go: "python main.py" in the Terminal, the program terminate like 1 second after I press enter.
  It's probably something with the code, or so I hope, so it's a little easier to get out of .
  
  Best regards,
  Benjamin.

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• BenjaminD Posts: 6

  September 2010

  Nevermind. I got it working. I just did a few code modifications and moved around a few things.
  This is the new (and working) code:

  import dbus
  import gobject
  from dbus.mainloop.glib import DBusGMainLoop
  
  DBusGMainLoop(set_as_default=True)
  bus = dbus.SystemBus()
  
  def device_added(udi):
      print "added"
  
  def device_removed(udi):
      print "removed"
  
  bus.add_signal_receiver(device_added, "DeviceAdded", "org.freedesktop.Hal.Manager", "org.freedesktop.Hal",
      "/org/freedesktop/Hal/Manager")
  bus.add_signal_receiver(device_removed, "DeviceRemoved", "org.freedesktop.Hal.Manager", "org.freedesktop.Hal",
      "/org/freedesktop/Hal/Manager")
  
  loop = gobject.MainLoop()
  loop.run()
  

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