Hello,
On Tuesday 19 March 2002 01:30, David Brownell wrote:
> USB standardizes two models for this kind of thing:
>
> - "compound device" such as "hub and keyboard", which is
> one physical device that appears as two USB device, each
> normally having one interface (that's not required, see next)
>
> - "multi-function device", such as "audio + volume control",
> which is one physical device that appears as one USB device,
> where each function is one interface.
>
> So it'd be one "U:" line per interface ("I:" line), at most. (I have
> examples of both such kinds of device.)
I just got an example of the opposite, so I suppose more U: lines per I:
line are necessary. No big deal.
>
> > As to the /devfs name... Could be done, but I would like to put the
> > amount of logic that is needed ina user program to a minimum, so 'old'
> > style /dev should be listed as well.
>
> Can't be done. Do your homework on "mknod" and see why.
> There can be N names, and the kernel absolutely does not
> know which policy a given filesystem used to assign them.
That's true for /dev, yes, but name me one Linux distro that doesn't name
5:0 as /dev/tty, or any other device. You'd be mad if you changed that.
> > Please explain "more fundamental ID" ? "net eth2" sounds fine (or
> > perhaps, "net:eth2"). It's either something like that or a node
> > starting with a / .
>
> No such filesystem node. The "more fundamental" ID would be
> whatever that "rename the interfaces" tool uses, I don't know
> the details.
This still eludes me. I'll work something out :)
> Allen Barnett posted something with printer support, 4-Apr 2001 in
> my mailbox. I've just reposted it under this thread.
Okay, I'll have a look.
- Nemosoft
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