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

[Grant Edwards]

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

Yes, I saw that rule (and it hasn't changed recently).  I also have a
rule that creates a symlink for a certain USB-serial adapter in
/etc/udev/rules.d/99-user.rules:

SUBSYSTEMS=="usb",\
 ATTRS{product}=="FT232R USB UART",\
 ATTRS{serial}=="AH026Q3X",\
 KERNEL=="ttyUSB*",\
 SYMLINK+="ttyDBG",\
 GROUP="uucp"

I didn't used to need to set the GROUP in that rule, the device file
just defaulted to having a group of uucp. Yesterday, I had to add the
"GROUP" command to get the behavior I always used to get without it.

-- 
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