devd question

[Andriy Gapon]

on 02/03/2009 15:51 Michael Sperber said the following:
> Andriy Gapon <avg at icyb.net.ua> writes:
> 
>> on 28/02/2009 16:34 Kostik Belousov said the following:
>>> On Sat, Feb 28, 2009 at 02:13:10PM +0100, Michael Sperber wrote:
>>>> I'm trying to make devd run an stty command whenever a USB serial device
>>>> is attached.  Unfortunately, $device-name is ucom[0-9] and the device
>>>> names are /dev/cuaU[0-9] - how do I get the correct name in the device
>>>> action?  I haven't found a way to extract the number by itself, so I'm
>>>> stuck with specifying a separate rule for each number, like so:
>>>>
>>>> attach 100 {
>>>>         device-name "ucom0";
>>>>         action "stty -f /dev/cuaU0.init raw";
>>>> };
>>>>
>>>> Help would be much appreciated!
>>> There are some other notifications that are send through devctl when
>>> cdev is created. They have system set to DEVFS, subsystem to CDEV,
>>> and type CREATE. The data is the /dev node name. I am not sure how
>>> to assign the action in the devd.
>> A tested example:
>> notify 1000 {
>>         match   "system"                "DEVFS";
>>         match   "subsystem"             "CDEV";
>>         match   "cdev"                  "^da[0-9]+$";
>>         action  "echo 't120o3l32 b>c+f+16' > /dev/speaker";
>> };
> 
> I'm probably not understanding this---but how is the device number
> transferred from the "cdev" match to the "action" line?

You don't need to, you can use /dev/$cdev in action line.

-- 
Andriy Gapon