From 5aebfbcb62614fc2bf2b1579d62e3fe272c6751a Mon Sep 17 00:00:00 2001 From: "david@fubar.dk" Date: Mon, 8 Dec 2003 09:19:19 -0800 Subject: [PATCH] D-BUS patch for udev-008 Attached is a patch against udev-008 to send out a D-BUS message when a device node is added or removed. Using D-BUS lingo, udev acquires the org.kernel.udev service and sends out a NodeCreated or NodeDeleted signal on the org.kernel.udev.NodeMonitor interface. Each signal carries two parameters: the node in question and the corresponding sysfs path. [Note: the D-BUS concepts of service, interface, object can be a bit confusing at first glance] An example program listening for these messages looks like this #!/usr/bin/python import dbus import gtk def udev_signal_received(dbus_iface, member, service, object_path, message): [filename, sysfs_path] = message.get_args_list() if member=='NodeCreated': print 'Node %s created for %s'%(filename, sysfs_path) elif member=='NodeDeleted': print 'Node %s deleted for %s'%(filename, sysfs_path) def main(): bus = dbus.Bus(dbus.Bus.TYPE_SYSTEM) bus.add_signal_receiver(udev_signal_received, 'org.kernel.udev.NodeMonitor', # interface 'org.kernel.udev', # service '/org/kernel/udev/NodeMonitor') # object gtk.mainloop() if __name__ == '__main__': main() and this is the output when hot-plugging some usb-storage. [david@laptop udev-008]$ ~/node_monitor.py Node /udev/sda created for /block/sda Node /udev/sda1 created for /block/sda/sda1 Node /udev/sda1 deleted for /block/sda/sda1 Node /udev/sda deleted for /block/sda The patch requires D-BUS 0.20 or later while the python example program requires D-BUS from CVS as I only recently applied a patch against the python bindings. --- TODO | 1 - 1 file changed, 1 deletion(-) (limited to 'TODO') diff --git a/TODO b/TODO index d5cc9194e6..e227834f36 100644 --- a/TODO +++ b/TODO @@ -21,7 +21,6 @@ greg@kroah.com will have an upgrade path. - do early boot logic (putting udev into initramfs, handle pivot-root, etc.) -- add hooks to call D-BUS when new node is created or removed - lots of other stuff... - actually use the BUS= value to determine where the LABEL rule should look (right now it's ignored, and we only look in the current sysfs directory.) -- cgit v1.2.3-54-g00ecf