Enumerating devices and hardware conf from userland

[Thierry DELHAISE]

Hi all,

Sorry first if my question seems stupid : I'm new in the FreeBSD Kernel 
design and so don't know all interfaces of the kernel in user land.

I'm developping a tool running in userland (root) (a command line 
tools) for enumerating all devices present on the machine :

This tool must scan all hardware buses : pci, but usb, firewire, ide, 
etc.... and retreive devices states : configure, not configured, handle 
by a driver, not handle by a driver, witch modules is the driver.
And I want to have all devices present inside a machine.


In some recent Kernel, there is a way from userland, to take a handle 
from the root hardware tree, enumeratiing first buses, and under buses, 
witch device are connect to those buses. This is is what I am looking 
for.

How to do this under FreeBSD ?


THX in advance for your help, advice, comment.


Thierry