[gentoo-user] Re: /dev/ttyUSB* group changed from uucp to root?

[Grant Edwards]

On 2014-09-25, Mike Gilbert <floppym@g.o> wrote:
> On Thu, Sep 25, 2014 at 11:28 AM, Grant Edwards
><grant.b.edwards@×××××.com> wrote:
>> On 2014-09-25, Mike Gilbert <floppym@g.o> wrote:
>>> On Wed, Sep 24, 2014 at 6:28 PM, Grant Edwards
>>><grant.b.edwards@×××××.com> wrote:
>>>> On 2014-09-24, Neil Bothwick <neil@××××××××××.uk> wrote:
>>>>> On Wed, 24 Sep 2014 19:42:56 +0000 (UTC), Grant Edwards wrote:
>>>>>
>>>>>> After an update yesterday, I've noticed that the group assigned to
>>>>>> ttyUSB devices has changed from uucp to root.  Non-USB serial ports
>>>>>> still seem to be uucp.
>>>>>
>>>>> What did you update? They are still root:uucp here.
>>>>
>>>> Several things got updated, but the most likely suspect is probably
>>>> sys-fs/udev-215-r1 => sys-fs/udev-216.  But, I don't see any changes
>>>> in the default rules to account for the change in behavior.
>>>
>>> I'm running systemd-216, and I see this in
>>> /lib/udev/rules.d/50-udev-default.rules:
>>>
>>> KERNEL=="tty[A-Z]*[0-9]|pppox[0-9]*|ircomm[0-9]*|noz[0-9]*|rfcomm[0-9]*",
>>> GROUP="uucp"

The test trace shows that rule setting the group to 14 (uucp).

>>> I suppose it is possible that some later rule overrides it, but I
>>> don't see anything obvious.

It appears to be overridden by

/lib64/udev/rules.d/99-openocd.rules

Which sets the group to 0 (root).  The weird thing is that I don't
know where that file came from.  Dong an "equery belongs" doesn't show
it belonging to any package. I do have dev-embedded/openocd installed,
but it doesn't own that file...  But, doing an emerge -C openocd
removed the file /lib64/udev/rules.d/99-openocd.rules.

It looks like a bug in the openOCD rules is causing it to recognize
somthing that it shouldn't.

Checking the emerge logs shows that openocd was emerged about a week
prior to the udev update (and I must have been mistaken about exactly
when the failure started).

-- 
Grant