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On Tue, 17 Sep 2002 23:03, Jan Keirse wrote:
> Hello,
>
> I was just wondering: If you have a laptop, and you have acces to a windows
> pc, would it be possible to make the laptop running linux pretend to be a
> usb mass storage device (making one directory in your filesystem look like
> the root of a harddrive to the windows pc). So in other words: Connect the
> notebook to the pc with a usb cable so that the notebook looks like a usb
> HD to windows. Does a driver for this exist (I've searched on the internet
> but couldn't find anything) and if not, would it be hard to create and what
> cable would be needed?
This can't be done without a special device, for a whole stack of electrical 
and protocol reasons. USB is a master-slave arrangement - Hosts can't talk to 
hosts. You need a lot more than just a cable with two A-type connectors on 
it!

There are special devices for connecting two PCs together, but they are 
normally designed as networking devices (see usbnet driver for "host-to-host" 
driver support) or to plug into parallel port or PCI buses (for development 
of other devices).

> In case you're wondering why this could possibly be usefull: if you have
> acces to a pc where you can't change the network configuration (because you
> don't have admin rights) plip and ethernet won't help you. So if you want
> to transfer data to and from this pc to the laptop I think this would be an
> easy sollution (the question is off course, is it possible to implement, my
> knowledge of usb and kernel development at the moment is very small, but
> I'm willing to learn a lot if I know there is a reasonable chance on
> succes).
Even if you had a suitable device, you still wouldn't get around the admin 
rights problem. 

If you are interested in a solution using those fairly cheap "host-to-host" 
device cables, I'd suggest trying to work the hotplug scripts to 
automatically establish a network connection between the two hosts, and then 
running rsync on both ends with a pre-configured "exchange" directory.

I'm willing to provide some architectural guidance. If you want to follow this 
up, we should take it to [EMAIL PROTECTED]
- -- 
http://conf.linux.org.au. 22-25Jan2003. Perth, Australia. Birds in Black.
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