If the target application is acquiring a dbus service then at least you can connect to NameOwnerChanged Signal and keep a track of the service name registered from which at least u can find the executable name by some hacks. (i can provide u those if needed) -- Regards silverroots <div class="gmail_quote">On Sat, Sep 12, 2009 at 8:29 AM, cbx <<a href="mailto:bnucbx@gmail.com">bnucbx@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hi,all! I want to know if there is any way to get notified when an application lauchs or quits.May be there exists something like a signal? Say,after my program connect to the dbus,if Rhythmbox(as an example) lauchs, my program can receive an signal.And then if rhythmbox closes later,another signal will be sent. I tried to use<cite> org.freedesktop.Dbus.</cite>NameAcquired, but it seems this signal is not for this purpose. Thank you! _______________________________________________ dbus mailing list <a href="mailto:dbus@lists.freedesktop.org">dbus@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/dbus" target="_blank">http://lists.freedesktop.org/mailman/listinfo/dbus</a> </blockquote></div>