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Today's Topics:
1. Re: Using Motion to wake Screensaver ([email protected])
2. Re: Using Motion to wake Screensaver (Mike Mironov)
3. Re: motion_user / group (Henk Demper)
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Message: 1
Date: Tue, 02 Feb 2021 20:05:19 +0200
From: [email protected]
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] Using Motion to wake Screensaver
Message-ID: <[email protected]>
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Message: 2
Date: Tue, 2 Feb 2021 21:45:25 +0300
From: Mike Mironov <[email protected]>
To: [email protected]
Subject: Re: [Motion-user] Using Motion to wake Screensaver
Message-ID: <[email protected]>
Content-Type: text/plain; charset="utf-8"; Format="flowed"
I? think your problem is X server security - xauth. When your run
command from pi user your use credentials from /home/pi/.Xauthority
file. In this file exist cookie for connect to Xserver.
When your run script from motion user your don't have this cookie.
Simplest solution: run command "xhost +" from pi user. It's disable X
security
02.02.2021 19:26, Kc Hundere wrote:
>
> 'm working on using a pi/official 7" touch screen with
> chromium-browser in kiosk mode to run screens to control my Home
> Automation system. I am trying to configure the pi camera with motion
> to wake the screen saver instead of touching the screen but am having
> no luck making it happen.
>
> From the command line via ssh , I can issue the command /DISPLAY=:0.0
> xset dpms force on/?to wake the screensaver, but it does not work
> issuing the command from either the on_event_start?trigger or the or
> the on_motion_detected?trigger. I have tried the command directly from
> motion.conf as well as including it in a bash script. Both methods
> work from the command line, but not from motion.
>
> It is not a permissions issue. I have a directory with the the
> ownership motion:motion?that house the scripts, and if I change the
> value of the trigger to />/motion/trigger/?it will dutifully create an
> empty file in that directory.
>
> Can anyone shed any new light to this issue?
>
>
> --
>
>
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Message: 3
Date: Tue, 2 Feb 2021 21:12:24 +0100
From: Henk Demper <[email protected]>
To: Motion discussion list <[email protected]>
Subject: Re: [Motion-user] motion_user / group
Message-ID:
<as8pr10mb4373c2d1fcb11c542940723693...@as8pr10mb4373.eurprd10.prod.outlook.com>
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Hello Rainer,
Not sure if this covers your problem (understood issues about permissions,
deleting clips etc):
- Motion creates directories and files, both are created with owner=motion and
group=motion
- Files are currently created by the motion application with 'default' access
rights -rw-rw-rw- (666)
and then 'outside' motion umask (Google for umask) is applied (default 022),
by default resulting in -rw-r--r-- (644) (group+user can't delete)
- Directories are created by the motion application with application-fixed
access rights drwxr-xr-x (755)
and then umask is applied (default 022), by default keeping drwxr-xr-x (755)
(group+user can't delete)
- As typically motion runs as a daemon, you can change the umask setting for
motion in this case (thanks to Damian in earlier mail) like:
"Triggered by your reply to change umask for the daemon only (not per user or
all non-privileged logins) I stumbled over
https://serverfault.com/questions/166176/ways-to-set-umask-on-ubuntu-for-daemon-processes
<https://serverfault.com/questions/166176/ways-to-set-umask-on-ubuntu-for-daemon-processes>
in which the last reply ads the --umask option to /etc/init.d/motion as
follows:
if start-stop-daemon --start --oknodo --exec $DAEMON -b --chuid motion
--umask 002 ; then
in the start) case. After making this change and restarting motion, starting
with an empty directory (no Log.txt, sub-directories or video files), this does
solve the issue for files: they are now created with 664 instead of 644
permission."
- But any created directory still has the 755 instead irrespective of umask
002, because we 'begin' with 755.
I made a feature request to change the directory access permissions to 777
in https://github.com/Motion-Project/motion/issues/1297
<https://github.com/Motion-Project/motion/issues/1297>
- You can simply add yourself (the user viewing the recording files) to the
motion group with (example user linaro on Asus Tinkerboard)
sudo usermod -a -G motion linaro
Result of all above: directories are (currently) first-time created like:
drwxr-xr-x 2 motion motion 45056 Feb 1 01:06 LivingRoom
but you can 1-time change their group permission after creation (and don't
delete them) with
sudo chmod g+w *
Resulting in
drwxrwxr-x 2 motion motion 45056 Feb 1 01:06 LivingRoom
Then all files (.jpg, .mkv, .mpg, ...) inside these directories after the umask
change in /etc/init.d/motion look like:
-rw-rw-r-- 1 motion motion 214220 Jan 29 22:43
Still_LivingRoom_Event-28_29-01-2021_22-42-55-00.jpg
Assuming you added yourself to the motion group, then you can now delete/move
any files without any sudo permission.
I have used this setup to run a cron non-superuser script, that regularly backs
up, then deletes files from a Micro-SD card on an Asus Tinkerboard SBC (12 hour
storage) to my NAS (few weeks storage).
Henk Demper
> On 29 Jan 2021, at 14:25, Rainer <[email protected]> wrote:
>
> Hi all,
>
> hoping this is the right area to ask general questions about motion, which I
> believe is an awesome surveillance program, once it is understood.
>
> I have read online that motion 4.3.1 plus gives the ability to change users
> with motion_user and change groups with motion_group.
>
> However, I can not find these in documentation.
>
> I am new to motion and Linux itself. I have installed motion 4.2.2 from the
> repository and, after a couple of weeks of trial and error, have made it work
> quite nicely.
>
> The only problem still is the user: with motion being a user, and it
> assigning itself privileges, I am having a difficult time with it using a
> second internal HDD, as well as other aspects (such as deleting triggered
> clips).
>
> I would be willing to uninstall 4.2.2 and go through a new installation if I
> knew user / group could be changed/ assigned.
>
>
> Also, is there a user group anywhere? This is a GREAT program which should
> have an area of discussion to make it easier to install and set up for
> beginner beginners like me. I am sure I could have done it within a couple of
> hours, rather than weeks, if I knew a couple of the basics right away.
>
> TY in advance,
> Rainer
>
>
>
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>
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