Re: Fwd: [Discuss-gnuradio] Big bugs out of nowhere...

[Igor Almeida]

On Sat, Dec 20, 2008 at 7:02 PM, Eric Blossom <address@hidden> wrote:
> On Sat, Dec 20, 2008 at 06:38:45PM -0300, Igor Almeida wrote:
>>
>> Hi Johnathan,
>>
>> Thank you for the insight. I was indeed NOT a user of the usrp group
>> to which udev was configuring the block device.
>> The thing is, we have an LDAP-configured network here, and we use it
>> to fetch a number of configs, including groups, passwords and whatnot.
>>
>> Bottom line, there were two 'usrp' groups: one from /etc/group, with
>> no members; and the other was from LDAP, with myself as member.
>>
>> So I removed the usrp group from /etc/group{,-}, and it no longer
>> exists acording to 'getent group|grep usrp', but now udev seems to be
>> confused as it changes the permissions correctly, but the group
>> association is not performed:
>> /dev/bus/usb/007:
>> total 0
>> crw-rw-r-- 1 root root 189, 768 2008-12-19 06:38 001
>> crw-rw---- 1 root root 189, 769 2008-12-19 09:50 002
>>
>> Notice the crw-rw---- block, which showed up when I plugged the usb cable.
>>
>> So if udev cannot be aware of the usrp group fetched from LDAP, the
>> whole LDAP-centralizing-access-permissions scheme goes down, because I
>> will have to manually create and maintain/synchronize the usrp group
>> in every machine on the lab.
>
>
> Have you looked at any of the system log files? Usually /var/log/*
> They'll probably tell you what's going on.
>
> There may also be a way to increase the level of debug output from udev.
>
> Eric
>

I started to copy/paste the logs from different sources but they were
all telling me everything was fine internally. It occurred to me that
the problem could be in /etc/nsswitch.conf:
group:          compat ldap

Since switching places could mean breaking something else, I added a
'continue' action, as oriented in
http://www.softpanorama.org/Solaris/Reference/etc/nsswitch.shtml :
group:          compat [NOTFOUND=continue] ldap

So up until now there have been no other problems. Thank you for your help!

-- 
Igor Almeida