Week 7 Update:

Brief Summary:
This week I researched about the jailhouse so that i can figure out
more about the root cell configurations and what things are needed to
load it properly in the QEmulated agl-Image, some of these include the
`Memory flags` and `Interrupts` used (or can be used) in the root
cell configurations.


This is the detailed report for the week 7:
https://anmol.netlify.app/post/week7/

Thanks and Regards,
Anmol <anmol.karan123@...>

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Description:

Hi everyone,

I want to get odometer data (distance travelled) and tire pressure from AGL, do we have any bindings for these two kinds of data?

I have tried low-can/list and it doesn't provide these two. I have also tried signal-composer/list, it has some responses like "uid":"front_left", "front_right", "rear_left", "rear_right. Are they for the tire pressures? And I also have trouble starting the signal-composer API, below is my command to start the API

afb-daemon --verbose --port=1111 --token=1 --name=afbd-signal-composer --binding=/var/local/lib/afm/applications/signal-composer/lib/afb-signal-composer.so --rootdir=/var/local/lib/afm/applications/signal-composer

And it gives me errors like below so I cannot get any data from the binding

ERROR: [API signal-composer] requiring api low-can initialized failed [/usr/src/debug/af-binder/master+gitAUTOINC+1b6249810b-r0/git/src/afb-export.c:382,require_api_cb]
ERROR: [API signal-composer] An error happened during verb call, error=unknown-api info=api gps not found (for verb subscribe) uid=init api=gps verb=subscribe args={ "value": "location" } response=NULL [/usr/src/debug/libappcontroller/11.90.0-r0/git/ctl-lib/ctl-action.c:92,HandleApiCallActionResponseFromEvent]

Any ideas or suggestions would be really appreciated. 

Best,

Qi

Well, I will try. Thanks for your help, I really appreciate it.

Best Regards
FA

On Tue, 6 Jul 2021 13:52:18 +0200
"Jan Simon Moeller" <jsmoeller@...> wrote:

Isn't the writeable application home directory like
/home/<userid-number>/app-data/<name-of-app>/

e.g.

/home/0/app-data/agl-service-hmi ?

/usr/local/lib/.... is the 'installation' directory and should not be
writeable by default.

Yes that is also my idea. The default working directory of the
application

$HOME/app-data/<name-of-app>/

is writable but the installation directory is not necessarily writeable.

It is of importance for multi-user behaviour.

I suggest to ste a hierachy of configuration if possible: use the
configuration file of the working directory, then a system config file
and then the install config file.

Best regards
José

Best regards,
Jan-Simon

------
Jan-Simon Möller
AGL Release Manager
The Linux Foundation

Visit us at:
www.automotivegradelinux.org
lists.automotivelinux.org
www.linuxfoundation.org


On Tue, Jul 6, 2021 at 12:20 PM Jose Bollo <jose.bollo@...> wrote:

On Tue, 06 Jul 2021 02:43:27 -0700
"Francesco ARGENTIERI (KINETON)" <francesco.argentieri@...>
wrote:

Have you checked audit messages in the journal?

Yes, in the journal there aren't present audit regarding my
service.

user/group/other + read/write/execute from ls -l

```sh
ls -l /usr/local/lib/afm/applications/agl-service-hmi/lib
total 8904
-rw-r--r--. 1 root root 9116016 Jul 6 09:35 libafm-hmi-binding.so

ls -l /usr/local/lib/afm/applications/agl-service-hmi/conf
total 8
-rw-r--r--. 1 root root 27 Jul 6 09:35 status.json
```

the owner is root

How is installed your service? Have you created and installed a
widget?

Yes, I used CMake to compile the project ```make widget```, then I
installed by ```afm-util install agl-service-hmi.wgt```

your widget probably runs as a not root user.

Hello Ehsan,

PipeWire's HSP/HFP bluetooth integration is currently tuned to transmit audio over the HCI channel and encode/decode the audio in software. The bluez_input and bluez_output nodes that you see in wpctl are basically portals to that functionality.

I have not previously worked with i2s bluetooth modules, but my understanding of them is that they provide a side-channel, in parallel to the HCI channel, where you can stream raw audio and it gets encoded/decoded in hardware. This side-channel is exposed via ALSA, so you can see individual nodes in wpctl for that.

I believe to make this work, WirePlumber needs to be instructed to link your speakers and microphone directly to the bluetooth alsa device instead of linking them to the bluez_input/bluez_output nodes, which are using the HCI channel.

Before making any changes to the code, you can try this manually. When you make a call and you see the streams that you have pasted below, use the pw-link tool to create links between:

* the bt i2c input node and "Communication Playback Endpoint"
* the "tlv320aic3106" (which must be the microphone input?) to the bt i2c output node

(and forget about bluez_input / bluez_output)

If this works, then all you need to do is to write a wireplumber lua script to integrate this logic into wireplumber.

Best regards,
George

On Tue, 06 Jul 2021 02:43:27 -0700
"Francesco ARGENTIERI (KINETON)" <francesco.argentieri@...>
wrote:

Have you checked audit messages in the journal?

Yes, in the journal there aren't present audit regarding my service.

user/group/other + read/write/execute from ls -l

```sh
ls -l /usr/local/lib/afm/applications/agl-service-hmi/lib
total 8904
-rw-r--r--. 1 root root 9116016 Jul 6 09:35 libafm-hmi-binding.so

ls -l /usr/local/lib/afm/applications/agl-service-hmi/conf
total 8
-rw-r--r--. 1 root root 27 Jul 6 09:35 status.json
```

the owner is root

How is installed your service? Have you created and installed a
widget?

Yes, I used CMake to compile the project ```make widget```, then I
installed by ```afm-util install agl-service-hmi.wgt```

your widget probably runs as a not root user.

Have you checked audit messages in the journal?

Yes, in the journal there aren't present audit regarding my service.

user/group/other + read/write/execute from ls -l

ls -l /usr/local/lib/afm/applications/agl-service-hmi/lib 
total 8904
-rw-r--r--. 1 root root 9116016 Jul  6 09:35 libafm-hmi-binding.so

ls -l /usr/local/lib/afm/applications/agl-service-hmi/conf
total 8
-rw-r--r--. 1 root root  27 Jul  6 09:35 status.json

How is installed your service? Have you created and installed a widget?

Yes, I used CMake to compile the project make widget, then I installed by afm-util install agl-service-hmi.wgt

On Tue, 06 Jul 2021 02:20:02 -0700
"Francesco ARGENTIERI (KINETON)" <francesco.argentieri@...>
wrote:

On Tue, Jul 6, 2021 at 11:12 AM, Jose Bollo wrote:

If your application runs with the label User::App::agl-service-hmi
then it is not an issue with Smack security module.

If your application has an other label, it is an other story. If you
are not sure, you can check it using 'ps -Z'.

```sh
h3ulcb:~# ps -Z
LABEL PID TTY TIME CMD
System 701 ttySC0 00:00:00 login
System 1058 ttySC0 00:00:00 sh
System 1113 ttySC0 00:00:00 ps
```

That is not the process status of your service. You have to add some
argument to get that status. If you try to run your service from
command line, logged as root, it can explain the issue. Have you
checked audit messages in journal?

Have you checked DAC permissions?

No, can you explain?

user/group/other + read/write/execute from ls -l

Launched by AGL framework, your application runs in an appropriate
working directory dedicated to its uses. Have you tried to write in
the current working directory?

Can you be more precise? In this passage what are you referring to?

How is installed your service? Have you created and installed a widget?

On Tue, Jul 6, 2021 at 11:12 AM, Jose Bollo wrote:

If your application runs with the label User::App::agl-service-hmi then it is not an issue with Smack security module.

If your application has an other label, it is an other story. If you are not sure, you can check it using 'ps -Z'.

h3ulcb:~# ps -Z
LABEL                               PID TTY          TIME CMD
System                              701 ttySC0   00:00:00 login
System                             1058 ttySC0   00:00:00 sh
System                             1113 ttySC0   00:00:00 ps

Have you checked DAC permissions?

No, can you explain?

Launched by AGL framework, your application runs in an appropriate working directory dedicated to its uses. Have you tried to write in the current working directory?

Can you be more precise? In this passage what are you referring to?

Best Regards
FA

On Tue, 06 Jul 2021 02:00:06 -0700
"Francesco ARGENTIERI (KINETON)" <francesco.argentieri@...>
wrote:

Hi Josè,

Thank you for letting me know.

I obtain:
```sh
chsmack -r /var/local/lib/afm/applications/agl-service-hmi/conf
/var/local/lib/afm/applications/agl-service-hmi/conf
access="User::App::agl-service-hmi" transmute="TRUE"
/var/local/lib/afm/applications/agl-service-hmi/conf/status.json
access="User::App::agl-service-hmi" ```

If your application runs with the label User::App::agl-service-hmi then
it is not an issue with Smack security module.

If your application has an other label, it is an other story. If you
are not sure, you can check it using 'ps -Z'.

Have you checked DAC permissions?

Launched by AGL framework, your application runs in an appropriate
working directory dedicated to its uses. Have you tried to write in the
current working directory?

Best regards
José