Thanks, Peter. After running those commands, I  was able to write to
slots file as user debian.

On Thu, Aug 31, 2017 at 6:56 AM, Peter Lawler <[email protected]> wrote:
>
>
> On Thursday, 31 August 2017 12:58:16 UTC+10, Drew Fustini wrote:
>>
>> This person noticed that Adafruit_BBIO doesn't work when not root:
>> https://forums.adafruit.com/viewtopic.php?f=49&t=105847#p606973
>>
>> Issue seems to be:
>> open("/sys/devices/platform/bone_capemgr/slots", O_RDWR|O_LARGEFILE) = -1
>> EACCES (Permission denied)
>>
>> Do we want to let normal users write to
>> /sys/devices/platform/bone_capemgr/slots ?
>> . chmod 664 /sys/devices/platform/bone_capemgr/slots
>
>
>
> $groupadd --system slots
> $usermod --append --groups slots debian
> then
> $chmod 664 /sys/devices/platform/bone_capemgr/slots
> $chgrp slots /sys/devices/platform/bone_capemgr/slots
> (though to be honest I have no idea if this would be permanent etc. and
> probably not, it would be 'nice')
>
>
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