Re: Can't get gpsfake/gpsd to work together

[Gary E. Miller]

Yo Steven!

On Tue, 17 May 2022 09:53:36 +0000
Steven Wawryk <steven.wawryk@acaciasystems.com.au> wrote:

> Hi Gary,
> 
> On Mon, 2022-05-16 at 11:12 -0700, Gary E. Miller wrote:
> > > On Fri, 2022-05-13 at 11:09 -0700, Gary E. Miller wrote:  
> > > > > An example command line with resulting output is:
> > > > > 
> > > > > $ gpsfake -v -l -P 2948 -c 1 output.nmea
> > > > > Processing output.nmea
> > > > > gpsd:ERROR: can't bind to local socket
> > > > > /tmp/gpsfake-3691836.sock gpsd:ERROR: control socket create
> > > > > failed, netlib error -1 Traceback (most recent call last):
> > > > >   File "/usr/bin/gpsfake", line 319, in <module>
> > > > >     test.run()
> > > > >   File "/usr/lib/python3/dist-packages/gps/fake.py", line
> > > > > 737, in run raise TestSessionError("daemon died")
> > > > > gps.fake.TestSessionError    
> > > > 
> > > > "can't bind to local socket" is a permission error.  Maybe you
> > > > have AppArmour, or SELinux, or some "seceurity" thing going.
> > > > Be sure those are OFF.  Also try as root.
> > > > 
> > > > Maybe also check that your /tmp is drwxrwxrwt    
> > > 
> > > Thanks!  Looks like it's apparmor.  This has taken me down a bit
> > > of a rabbit hole with apparmor.  
> > 
> > Please file a bug report with your upstream.  Help your distro not
> > confuse any more poor users.

Did you file that bug report with Ubuntu?

> > This would have been spotted right away if you had sent us the
> > output of gpsdebugingo run as root.  Get a copy here:
> > 
> > https://gpsd.io/gpsdebuginfo
> > 
> > Please do that next.  That will save a lot of back and forth asking
> > you what versions of things you have, etc.  
> 
> I don't have the root password for my development machine, so sudo is
> my only option for now.

No.  Just do this:

$ sudo /bin/pash
# passwd
# exit
$ su -

Done.


> But as well as running with sudo (attached
> gpsdebuginfo.sudo), I also ran it from a "sudo bash" shell (attached
> gpsdebuginfo.sudo.bash) just in case that makes a difference.
> Checking the diff, there are some differences, but I'm not sure
> that's what you need.

The "sudo bash" one is best, but not quite as good as running as root.

Of note:

> gpsd: 3.20 (revision 3.20)

That is from 2019!  You need to file a bug with Ubuntu about the old
version. The update to a newer version..

You are running gpsd underder systemd(umb), without the "-n" option.

YOu need to set GPSD_OPTIONS="-n"

You are running gpsd with no GNSS receiver connectioned.

You are running Python 2.7 as your main Python:

/usr/bin/python
+ python -V
Python 2.7.18

Why?

But the only thing that might explain the python error is the old gpsd
version.


> > > The gpsd install also installed /etc/apparmor.d/usr.sbin.gpsd.  
> > 
> > How did you install gpsd?  That is NOT part of the default gpsd
> > install! I assume you got a package from somewhere?  Somewhere that
> > is not us?  
> 
> The ubuntu 20.04 repos

Ugh.  Please file a bug report.  gpsd from 2019 has been improved a lot.

> > > $ gpsfake -v -l -P 2948 -c 1 output.nmea  
> > 
> > Ambitious to start with, but looks OK.
> >   
> > > Processing output.nmea
> > > gpsfake: log cycle of output.nmea begins.
> > > Traceback (most recent call last):
> > >  File "/usr/bin/gpsfake", line 319, in <module>
> > >    test.run()
> > >  File "/usr/lib/python3/dist-packages/gps/fake.py", line 755, in
> > > run if not chosen.go_predicate(chosen.index, chosen):
> > >  File "/usr/bin/gpsfake", line 120, in fakehook
> > >    announce = fakegps.testload.legend \
> > > TypeError: can only concatenate str (not "bytes") to str  
> > 
> > Those line numnbners don't work for me/  Are you using a really old
> > gpsfake?  
> 
> Version 3.20 - standard with the above repos

Ugh.  Please file a bug report.  gpsd from 2019 has been improved a lot.

> > > Does this error mean anything to you?  
> > 
> > Yeah, it looks like you are using a Python2 program under
> > Python3....  
> 
> Oh dear!  The "gpsd-clients" package containing gpsfake depends on the
> "python3-gps" and "python3" packages in the above repos, so I don't
> know where any python2 program is coming from.

gpsd runs on both Python2 and Python3, so that's a start.

> > Can you try the lates gpsd release (3.24) or gsd from git?
> > You already showed you package has problems, this looks like
> > anouther one.  
> 
> I'll give that a go, but it might take a few days before I can do
> that.

No rush on our end.  I'll guess that fixes things for you. remember to
uninstall the old gpsd before installing from source.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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    "If you can't measure it, you can't improve it." - Lord Kelvin

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