Using a scanner (USB) as user and not as root

[Warren Block]

On Thu, 29 Apr 2010, Marco Beishuizen wrote:

> On Wed, 28 Apr 2010, Warren Block wrote:
>
>> You can use devd.conf for this:
>> 
>> attach 100 {
>>        device-name "ugen[0-9].[0-9]";
>>        match "vendor" "0x04b8";
>>        match "product" "0x010a";
>>        action "usb_devaddr=`echo $device-name | sed 's#^ugen##'` && \
>>                chown root:saned /dev/usb/${usb_devaddr}.* && \
>>                chmod 0660 /dev/usb/${usb_devaddr}.*
>> 
>> Copied from a post on -current or similar; apologies to the author, who 
>> I've forgotten.  I thought this was in the default devd.conf as an example, 
>> but it appears not.
>> 
>> devfs.rules don't apply to devices that are created dynamically after 
>> boot-up.  Or I guess they might be if you reload the ruleset with applyset 
>> after the device is created, but devd is a lot more capable.
>
> Unfortunately this didn't help either (I replaced the vendor and product with 
> the correct digits for my scanner, and the chown with the user name). The usb 
> devices are still owned by root and not accessible as user.

For the sake of completeness: devd has to be restarted after changes to 
devd.conf, and the code above is only executed when the scanner is 
detected (USB cable plugged in or scanner powered on).

-Warren Block * Rapid City, South Dakota USA