[Nut-upsuser] usbhid-ups must use '-u root'

[Greg Vickers]

Well, it won't install because the version in wheezy is the same as the 
version in wheezy-backports.

Right:
# ls -la /dev/bus/usb/002
total 0
drwxr-xr-x 2 root root       80 Nov 15 13:31 .
drwxr-xr-x 7 root root      140 Nov 15 13:31 ..
crw-rw-r-T 1 root root 189, 128 Nov 15 13:31 001
crw-rw-r-T 1 root root 189, 129 Nov 15 13:37 002

No surprise there!  Guess it was a permission thing, I did 'chown 
root:nut 002' and I could start the driver without '-u root'.  I 
rebooted the netbook and voila!  The permissions are now created correctly.

Onwards.

On 15/11/2014 9:29 am, Greg Vickers wrote:
> Hi,
>
> Self-reply ftw, is it something to do with the permissions of the 
> device that is created when the UPS is plugged in?  I remember that 
> Debian does have a pretty strict permissions structure, so do I have 
> to fiddle the permissions of something in /dev?
>
> I'll try updating nut-server to version 2.6.4-2.3+deb7u1 in wheezy 
> backports and report back - initial attempt to install from wheezy 
> backports is not working! (New package won't install when running 
> 'aptitude -t wheezy-backports install nut-server', even though 
> aptitude got the updated package list correctly...)
>
> Thanks,
> Greg
>
> On 14/11/2014 9:57 pm, Greg Vickers wrote:
>> Hi all,
>>
>> (Keeping this in a separate email from my first one so as to not make 
>> it horribly complex)
>>
>> I've connected my Belkin F6C120auUNV UPS to my Debian 7.7.0 host via 
>> USB, and found that the usbhid-ups driver will not start unless I use 
>> the option '-u root', even when starting this driver as root:
>> root at monitor:/lib/nut# cat /etc/nut/ups.conf
>> [greything]
>>     driver = usbhid-ups
>>     port = auto
>> root at monitor:/lib/nut# ./usbhid-ups -a greything
>> Network UPS Tools - Generic HID driver 0.37 (2.6.4)
>> USB communication driver 0.32
>> Can't claim USB device [050d:0912]: could not detach kernel driver 
>> from interface 0: Operation not permitted
>> root at monitor:/lib/nut# ./usbhid-ups -a greything -u root
>> Network UPS Tools - Generic HID driver 0.37 (2.6.4)
>> USB communication driver 0.32
>> Using subdriver: Belkin HID 0.15
>> root at monitor:/lib/nut# ps aux | grep usbhid
>> root      4857  0.1  0.0  16888   712 ?        Ss   21:54   0:00 
>> ./usbhid-ups -a greything -u root
>> root      4859  0.0  0.0   7836   880 pts/0    S+   21:54   0:00 grep 
>> usbhid
>>
>> Is this expected behavior?  Seems like it should not be required, a 
>> quick google found this:
>> https://bugzilla.redhat.com/show_bug.cgi?id=488368 (not the same 
>> situation, but the short-term fix detailed works, i.e. use '-u root')
>>
>> Thanks,
>> Greg
>>
>>
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