Re: hotplug-ng

Re: hotplug-ng

[andreas.walden]

Thanks for your reply,


I've got one last proplem. The programm, that I put into
/etc/hotplug.d/usb/ is always invoked two times when an hotplug event
occures. This causes my program crashes...


regards,


Andreas W.












On Thu, Mar 10, 2005 at 09:13:58AM +0100, andreas.walden@philips.com wrote:
> Dear Greg,
>
> I'm student doing an intership at philips medical systems. At the moment
> I'm  working with an embedded system CSB337 with ARM AT91RM9200 and linux
> kernel 2.6.11. It's working fine. My aim is to call a program with
> parameter when putting on a hotpluggable device like an usb mouse so that
> the program always know if the plugged device is mouse0 or mouse1 or
> keyboard0 and so on
>
> I' ve installed your hotplug-ng and compiled it with DEBUG messages and
> when I plug in an usb mouse i get the following /var/log/messages

It all looks just fine, what is the problem?

> Unfortunately I Don't understand why the path /etc/hotplug.d/default has
to
> be opened...

That's they way the spec says it needs to be.  If it's not there, fine,
nothing bad happens.

> In fact, it doesn't exist.... How can I readout the arguments
> which are passing to hotplug and how can I tell hotplug to invoke my
> Programm or otherwise tell my programm to listen to hotplug???

put your program in the proper place in the /etc/hotplug.d/ tree, and it
will be run.  Read the documentation (or the /sbin/hotplug script) for
more details on how to do this.

Also, any further questions should be addressed to the
linux-hotplug-devel mailing list, not directly to me.

Good luck,

greg k-h




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Re: hotplug-ng

[Marco d'Itri]

On Mar 14, andreas.walden@philips.com wrote:

> I've got one last proplem. The programm, that I put into
> /etc/hotplug.d/usb/ is always invoked two times when an hotplug event
> occures. This causes my program crashes...
Check *all* the variables, there is probably a reason for this.

-- 
ciao,
Marco


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hotplug-ng

[Chris Steel]

Hi,

is hotplug-ng still a going concern? I notice that
it's not included in the sourceforge hotplug downloads
any more (though it's still in the kernel.org
downloads).

I always thought it was the way to go as it's written
in C rather than shell scripts, so should be way
faster and smaller for embedded systems? Are there any
disadvantages to using hotplug-ng rather than any of
the other hotplugs?

cheers

Chris



	
	
		
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Re: hotplug-ng

[Marco d'Itri]

On Feb 02, Chris Steel <chriszaurus@yahoo.co.uk> wrote:

> is hotplug-ng still a going concern? I notice that
No. Forget about it and install udev.

-- 
ciao,
Marco

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Re: hotplug-ng

[Chris Steel]

It's been a while since I looked at what udev /
hotplug do so please forgive my ignorance :-) I
thought that udev needs hotplug to handle kernel
hotplug events for things like usb flash stick
insertion / removal. Does udev-104 handle kernel
hotplug events without any intervention from (any kind
of) hotplug? I've tried building udev-104 and it
doesn't seem to replace /sbin/hotplug, and the
standard S10udev script that is installed still leaves
/proc/sys/kernel/hotplug pointing to /sbin/hotplug?

Is hotplug still required by udev or have I missed the
point?

cheers

Chris

--- Marco d'Itri <md@Linux.IT> wrote:

> On Feb 02, Chris Steel <chriszaurus@yahoo.co.uk>
> wrote:
> 
> > is hotplug-ng still a going concern? I notice that
> No. Forget about it and install udev.
> 
> -- 
> ciao,
> Marco
> 



	
	
		
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Re: hotplug-ng

[Marco d'Itri]

On Feb 02, Chris Steel <chriszaurus@yahoo.co.uk> wrote:

> It's been a while since I looked at what udev /
> hotplug do so please forgive my ignorance :-) I
> thought that udev needs hotplug to handle kernel
Not anymore since a very long time.

-- 
ciao,
Marco

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Re: hotplug-ng

[Bauke Jan Douma]

Dan Nicholson wrote on 02-02-07 18:50:
> [..deletia...]
> The right way to do this is to tell the kernel to not use anything for
> the event handler since udev will handle this on it's own.
> 
> echo "" > /proc/sys/kernel/hotplug
> 
> I'm pretty sure everybody using udev does this in their init script.

I do.
Which is not to say udev isn't a hell hole ;-)
But it's a rewarding hello hole when you
(finally) get it right.


> 
> --
> Dan

bjd



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