getting node from path

getting node from path

[Jon Smirl]

My program needs to convert the device path into a node name. What's the best
way to do this?

The program resets the video hardware so it will run at early boot time. Is
there a static udev library I can link to? Or should I exec this:  udevinfo -r
-q name -p /class/dri/card0. Will the exec work during early boot?

How do I make sure that udev has had a chance to create the node before I try
using it? My driver will probably be compiled in so I will get my hotplug event
very early.



==Jon Smirl
jonsmirl@yahoo.com

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Re: getting node from path

[Greg KH]

On Tue, Feb 03, 2004 at 05:40:05PM -0800, Jon Smirl wrote:
> My program needs to convert the device path into a node name. What's the best
> way to do this?
> 
> The program resets the video hardware so it will run at early boot time. Is
> there a static udev library I can link to? Or should I exec this:  udevinfo -r
> -q name -p /class/dri/card0. Will the exec work during early boot?

There is no static udev library right now.  exec should work just fine
during early boot.

> How do I make sure that udev has had a chance to create the node before I try
> using it? My driver will probably be compiled in so I will get my hotplug event
> very early.

Look to see if it is there?  Sleep until it shows up?

thanks,

greg k-h


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