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

[Steven Wawryk]

Thanks for the help Gary.

Comments inline below.

Cheers,
Steve

-- 
Steven Wawryk <steven.wawryk@acaciasystems.com.au>

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.

The gpsd install also installed /etc/apparmor.d/usr.sbin.gpsd.  I don't yet 
know enough to be able
to edit this to allow access to gpsfake's socket.  So I've disabled it with:

$ sudo ln -s /etc/apparmor.d/usr.sbin.gpsd /etc/apparmor.d/disable/usr.sbin.gpsd
$ sudo apparmor_parser -R /etc/apparmor.d/usr.sbin.gpsd

This gets me over the permission problem, but into the next one, but at least 
it's finally getting
somewhere:

$ gpsfake -v -l -P 2948 -c 1 output.nmea
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

Does this error mean anything to you?