[mythtv-users] Permissions and HD3000 QAM_256 setup

[Warren]

Mark Johannessen wrote:
> This is probably a basic persmissions question.  I am now working on
> getting a channel lineup for an HD3000 card.  Per the
> Adding_QAM_Channels_For_HDTV_Tuner_Cards wiki:
>
> $ ./atscscan atsc/us-Cable-Standard-center-frequencies-QAM256
> scanning atsc/us-Cable-Standard-center-frequencies-QAM256
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> main:2232: FATAL: failed to open '/dev/dvb/adapter0/frontend0': 13
> Permission denied
>
> However, when I run atscscan as root, I can get a channel listing that
> I then put in a file /home/mythtv/.azap/channels.conf such as ....
>
> # ./atscscan atsc/us-Cable-Standard-center-frequencies-QAM256
> ....
> [0007]:573000000:QAM_256:1031:1639:7
> [0006]:573000000:QAM_256:1026:1027:6
> [0005]:573000000:QAM_256:1021:1022:5
> [0001]:573000000:QAM_256:1001:1002:1
> ....
>
> Now I try to get a channel lock by ...
>
> $ /usr/local/bin/azap -r [0007]
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> ERROR: failed opening '/dev/dvb/adapter0/frontend0' (Permission denied)
>
> I try this as root:
> # /usr/local/bin/azap -r [0007]
> using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
> ERROR: could not open file '/root/.azap/channels.conf' (No such file
> or directory)
> No such file or directory
>
> I then checked permissions:
>
> $ ls -la -R /dev/dvb
> /dev/dvb:
> total 0
> ?---------  ? ? ? ?           ? .
> ?---------  ? ? ? ?           ? ..
> ?---------  ? ? ? ?           ? adapter0
> ls: /dev/dvb/adapter0: Permission denied
>
> and ...
>
> # ls -la -R /dev/dvb
> /dev/dvb:
> total 0
> drw-rw-rw-   3 root mythtv   60 Mar 27 10:55 .
> drwxr-xr-x  13 root root   4320 Mar 27 10:55 ..
> drw-rw-rw-   2 root mythtv  120 Mar 27 10:55 adapter0
>
> /dev/dvb/adapter0:
> total 0
> drw-rw-rw-  2 root mythtv    120 Mar 27 10:55 .
> drw-rw-rw-  3 root mythtv     60 Mar 27 10:55 ..
> crw-rw-rw-  1 root mythtv 212, 4 Mar 27 10:55 demux0
> crw-rw-rw-  1 root mythtv 212, 5 Mar 27 10:55 dvr0
> crw-rw-rw-  1 root mythtv 212, 3 Mar 27 10:55 frontend0
> crw-------  1 root root   212, 7 Mar 27 10:55 net0
>
> In order to get the above permissions to stick on reboot, I added the
> following to /etc/rc.d/rc.local:
>
> chmod -R 666 /dev/dvb
> chgrp -R mythtv /dev/dvb
>
> The basic question is, should azap, atscscan, etc be run as root or
> should I be working as the mythtv user?
>
> Mark
> _______________________________________________
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> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>   
There was a long thread about this about 2 weeks ago.  Either change
udev to give the permissions you want or run the scripts and mythbackend
as root.

W