[systemd-devel] How to wait for a group of devices?

[Manuel Reimer]

Hello,

I need two service files for two daemons.

The first one expects some type of device to be accessible via USB.

So what I need for this one is something like "Wait until all currently 
plugged in USB devices are enumerated and the relevant kernel modules 
have been loaded".

The second one wants to access DVB devices.

These could be connected via PCI, PCI express or USB. So here I need 
"Wait until all possible, currently connected, DVB devices are 
initialized and drivers are loaded".

Is there something like that? "udevadm settle" doesn't seem to do the trick.

Thank you in advance

Yours

Manuel