Re: Question regarding hotplug/udev + USB key

[Andrey Borzenkov <arvidjaar@mail.ru>]

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On Friday 11 May 2007, Greg wrote:
> On May 11, 2007, at 3:34 AM, Greg KH wrote:
> > Great questions, care to ask this on the linux-hotplug-devel mailing
> > list and CC me?  That way I can answer it in public to enable everyone
> > else to know the answer, and let the search engines pick it up.
>
> Sure thing! Here's my question again:
>
> I'm currently working on a project (a program written in C++) and I
> need to be notified whenever a USB key is attached to the computer
> and what the absolute path of that key is so that I can automatically
> see what's inside of it.
>
> What is the easiest and proper (modern) way of doing this?  Should I
> create a script in /etc/hotplug.d/usb or should I add a rule to the /
> etc/udev/rules.d folder? 

yet another possibility is to use HAL notifications over D-Bus (listen for 
DeviceAdded and then check for speific porperties). This way you may even 
expect more portability as udev is Linux specific and HAL is available on 
Solaris and BSD (although I do not know how complete implementation is). HAL 
specification is on 
http://people.freedesktop.org/~david/hal-spec/hal-spec.html; freedesktop.org 
also hosts D-Bus; specifically 
http://www.freedesktop.org/wiki/Software/dbus-cpp seems to provide C++ 
binding to D-Bus (but you of course can use C bindings which are more 
mature).

HTH

-andrey

> Please be aware that I'm really kind of 
> shooting in the dark here and don't really have a strong grasp on any
> of this so if you happen to know of a good link that might point me
> in the right direction to solving my problem I would appreciate that
> greatly as well (currently I'm going off of what are likely outdated
> online documents).
>
> The computer that this program will run on has a linux 2.6 kernel.
>
> Kind regards,
>
> - Greg Slepak
>
>
>
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