[mythtv-users] mythtv XMLTV wiki instructions
Bill Meek
keemllib at gmail.com
Thu Jul 30 00:47:52 UTC 2020
On 7/29/20 7:13 PM, Mark Perkins wrote:
>
> ________________________________
> From: "A. F. Cano" <afc54 at comcast.net>
> Sent: Thursday, 30 July 2020 9:25 am
> To: mythtv-users at mythtv.org
> Subject: Re: [mythtv-users] mythtv XMLTV wiki instructions
>
> On Wed, Jul 29, 2020 at 04:48:05PM -0400, James Abernathy wrote:
>> On Wed, Jul 29, 2020 at 2:20 PM Mark Perkins <[1]perkins1724 at hotmail.com>
>> wrote:
>>
>> ══════════════════════════════════════════════════════════════════════════
>>
>> From: James Abernathy <[2]jfabernathy at gmail.com>
>> Sent: Thursday, 30 July 2020 2:02 am
>> To: Discussion about MythTV
>> Subject: [mythtv-users] mythtv XMLTV wiki instructions
>>
>> I noticed the addition of:
>> Be sure to read: [3]#MythTV_Setup. Hint: sudo --login --user=mythtv
>> in the mythtv xmltv wiki. I normally just sudo su mythtv and then do
>> all the commands to set up the XMLTV. However today I thought I just
>> see how prefacing the normal instructions with the sudo --login --user
>> mythtv and got an error message on on the second command in the
>> setting up with tv_grab_zz_sdjson_sqlite:
>> jim at mythbuntu:~$ sudo --login --user=mythtv tv_grab_zz_sdjson_sqlite
>> --configure --config-file $HOME/.mythtv/SD.xmltv
>> Failed to write to /home/jim/.mythtv/SD.xmltv.TMP at
>> /usr/local/share/perl/5.30.0/XMLTV/Configure.pm<http://Configure.pm> line 187.
>> Not sure why and just thought I'd report it.
>> I'll stick to my tried and true method of just sudo su mythtv and then
>> do all the work. And when I did it this time I just initialized and it
>> all worked.
>> Jim A
>>
>>
>>
>> What does this return?
>> sudo --login --user=mythtv echo $HOME
>> And how does it compare to:
>> sudo su mythtv
>> echo $HOME
>>
>> Yeap, it different:
>> jim at mythbuntu:~$ sudo --login --user=mythtv echo $HOME
>> [sudo] password for jim:
>> /home/jim
>> jim at mythbuntu:~$ sudo su mythtv
>> mythtv at mythbuntu:/home/jim$ echo $HOME
>> /home/mythtv
>> mythtv at mythbuntu:/home/jim$
>> Jim A
>
> Interestingly, on Debian 10/stable (up to date) I get the same $HOME:
>
> <custom-prompt> sudo --login --user=mythtv
> $ echo $HOME
> /var/lib/mythtv
> $ ^D
> <custom-prompt> sudo su mythtv
> <custom-prompt> echo $HOME
> /var/lib/mythtv
> <custom-prompt> ^D
> <custom-prompt>
>
> The only difference is that with the --login option it executes a login
> shell, which does reset the PS1 variable, which is otherwise not changed
> in the second case. I set PS1 to a <custom-prompt> in ~/.bash_aliases,
> called from ~/.bashrc.
>
> This is probably how it's supposed to work.
>
> Augustine
> _______________________________________________
> mythtv-users mailing list
>
>
> Decided to check the wiki - yes it appears the command should be two lines not one.
>
> Or more specifically - the intention (hint) is not to preface the normal instructions with the sudo --login --user mythtv. The intention is to use sudo --login --user mythtv without a command at the end to open an interactive shell and enter the commands inside that shell.
Since I wrote the hint, and it "works for me", the intention was to prefix all of the
commands with it. What I actually use is a BEcomeMythtv alias:
alias bem='sudo --set-home --login --user=mythtv'
So: bem tv_grab..... does the desired job. Prefixing all four of the
grabber setup commands with bem or the full sudo line above.
But it's wrong for yet another reason. Some users have a system mythtv user in
/etc/password with no HOME or SHELL. Using MYTHCONFDIR locates the things
'normally' found in ~mythtv.
A cop-out may be specifying the full path or warning that MYTHCONFDIR may
be in play (which can be discovered with):
$ systemctl show --property=User,Home,Environment mythtv-backend
Environment=MYTHCONFDIR=/home/mythtv/.mythtv
User=mythtv
But, that's only valid for systemd. Better cop-out: run as the mythtv
user and location of it's configuration directory. Which ruins the
whole hint concept.
--
Bill
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