Re: [udev] support arguments in callout exec

[Greg KH <greg@kroah.com>]

On Thu, Nov 20, 2003 at 01:47:36AM +0100, Arnd Bergmann wrote:
> 
> Aside from that, it looks good. Maybe there should be a way to escape
> spaces in the argument in case someone wants to do something like that:
> 
> CALLOUT, PROGRAM="sh -c 'echo ${DEVPATH} | tr a-z A-Z'", BUS="usb", ID="XXX", NAME="webcam%n"

Oh come on, why not just make that into a simple script, we're trying to
keep udev simple :)

> To take that even further, do you think it might be a good idea to 
> preprocess the string in the same way as the NAME= argument, allowing e.g.
> PROGRAM="/bin/devname %b %M:%m" ?

Hm, good idea.

Someone else also proposed adding a number modifier to the %b field to
pick out a specific character from a bus id.  Anyone have any thoughts
about this?  Personally, I think it will be a bit hard to handle bus ids
that are not fixed widths all the time, but might be handy to try to
implement a devfs-like udev config file.

thanks,

greg k-h


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