What subsystem replaces /sbin/hotplug in CentOS 5? The older hotplug package is missing from CentOS 5 and /proc/sys/kernel/hotplug yields an empty string. Since hotpluging for standard devices still seems to work, I presume that something replaces the hotplug helper found on CentOS 4. Can someone point me in the right place? All of my Googleing points me back to the (obsolete?) /sbin/hotplug subsystem (Google is just not being helpful!). I'm guessing udev and/or HAL are involved somehow, but I am having a hard time figuring out what I need to do.
Specificly, I have a special USB device (a PI Engineering Rail Driver Console device) that I have written a daemon for that I need to launch when the device is plugged in and when the device is unplugged, the daemon needs to be killed. For CentOS 4, I used a script fired up from the /sbin/hotplug via /etc/hotplug/usb.usermap -- what to I use for CentOS 5 (and eventually CentOS 6)?