Re: [gpsd-users] GPSD and systemd

[Gary E. Miller]

Yo Charles!

Great stuff!  Prolly needs to be added to git head somehow.

On Tue, 7 Mar 2017 17:32:25 -0700
Charles Curley <address@hidden> wrote:

> Some notes on systemd as it applies to gpsd. Some folks don't like
> gpsd, and that's fine. This is for those who are obliged to live with
> it. It is an effort to consolidate several years of wisdom on the
> gpsd email list.
> 
> All of this is on debian 8.7 (jessie).
> 
> I am no expert on systemd! This is the result of reading several email
> threads on the gpsd list, the systemd docs, and some
> experimentation. I welcome improvements and corrections.
> 
> 1. To customize configurations on systemd, copy the application's
>    file(s) from /lib/systemd/system to /etc/systemd/system, and edit
>    the new copy. This over-rides the /lib/systemd/system
>    original. Doing it this way should preserve your changes against
>    upgrades to the /lib/systemd/system originals.
> 
>    To make your changes effective, run "systemctl daemon-reload", and
>    keep an eye on your log file (/var/log/syslog on Debian) for
>    errors.
> 
> 2. The -G option to gpsd is useless without editing gpsd.socket. This
>    is what I have:
> 
>    --------------------------------------------------
>    [Unit]
>    Description=GPS (Global Positioning System) Daemon Sockets
> 
>    [Socket]
>    ListenStream=/var/run/gpsd.sock
>    ListenStream=[::]:2947
>    ListenStream=0.0.0.0:2947
>    SocketMode=0600
>    BindIPv6Only=ipv6-only
> 
>    [Install]
>    WantedBy=sockets.target
>    --------------------------------------------------
> 
>    I believe you must have the BindIPv6Only=ipv6-only line. I omitted
>    it, and got error messages. They went away when I added it. It may
>    be that you can use the IPV6 line only, and you will still get gpsd
>    on the IPV4 port. I did not experiment with that.
> 
>    Thanks to Florian Petry <address@hidden>, and "David J
>    Taylor" <address@hidden> for leading the way.
> 
> 3. Starting and stopping gpsd is problematic with the default
>    gpsd.service. Mine looks like so:
> 
>    --------------------------------------------------
>    [Unit]
>    Description=GPS (Global Positioning System) Daemon
>    Requires=gpsd.socket
>    # Needed with chrony SOCK refclock
>    After=chronyd.service
> 
>    [Service]
>    Type=forking
>    # PIDfile=/var/run/gpsd.pid
>    # EnvironmentFile=-/etc/default/gpsd
>    ExecStart=/usr/local/sbin/gpsd -G /dev/ttyUSB0
> 
>    [Install]
>    WantedBy=multi-user.target
>    Also=gpsd.socket
>    --------------------------------------------------
> 
>    Once you have this you can use service to control gpsd ("service
>    gpsd start", etc.) and various systemd tools.
> 
>    This gets rid of /etc/default/gpsd entirely, a good thing.
> 
>    Thanks to Moe <address@hidden>, Bernd Zeimetz <address@hidden> (our
>    Debian maintainer), and Bryan Christianson <address@hidden>
> 




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

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

pgpys9XiHIaQV.pgp
Description: OpenPGP digital signature