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Version 0.4.3 Workarounds

Workarounds for non-Raspberry Pi systems

The rbfeeder binary has some issues when running on non-RPi systems.

I've been able to come up with the following workarounds.

Workaround for CPU Serial

The rbfeeder binary effectively greps for serial\t\t: in your /proc/cpuinfo file, to determine the RPi's serial number.

For systems that don't have a CPU serial number in /proc/cpuinfo, we can "fudge" this by generating a fake cpuinfo file, with a random serial number. To do this:

# make a directory to hold our fake data
mkdir -p -m 777 /opt/adsb/data

# generate a fake cpuinfo file
# start by taking our current cpuinfo file
cp /proc/cpuinfo /opt/adsb/data/fake_cpuinfo
chmod u+w /opt/adsb/data/fake_cpuinfo

# ... make sure we have hexdump installed
[[ ! which hexdump >/dev/null 2>&1 ]] && sudo apt install -y bsdmainutils

# ... and add a fake serial number to the end
echo -e "serial\t\t: $(hexdump -n 8 -e '4/4 "%08X" 1 "\n"' /dev/urandom | tr '[:upper:]' '[:lower:]')" >> /opt/adsb/data/fake_cpuinfo

The hexdump... in the command above will generate a random hexadecimal number in the format of a Raspberry Pi serial number.

You can now map this file into your container.

If using docker run, simply add -v /opt/adsb/data/fake_cpuinfo:/proc/cpuinfo to your command.

If using docker-compose, add the following to the volumes: section of your radarbox container definition:

- /opt/adsb/data/fake_cpuinfo:/proc/cpuinfo

Workaround for Temperature Sensor

As the rbfeeder binary is designed to run on a Raspberry Pi, the rbfeeder binary expects a file /sys/class/thermal/thermal_zone0/temp to be present, and contain the CPU temperature. If this file doesn't exist, the rbfeeder binary will segfault.

We can generate a "fake" temperature sensor. To do this:

# make a directory to hold our fake data
mkdir -p /opt/adsb/data/radarbox_segfault_fix/thermal_zone0

# generate a fake temperature sensor
echo 24000 > /opt/adsb/data/radarbox_segfault_fix/thermal_zone0/temp

You can now map this file into your container.

If using docker run, simply add -v /opt/adsb/data/radarbox_segfault_fix:/sys/class/thermal:ro to your command.

If using docker-compose:

  1. Create a volume definition at the top of your compose file:
volumes:
  radarbox_segfault_fix:
    driver: local
    driver_opts:
      type: none
      device: /opt/adsb/data/radarbox_segfault_fix
      o: bind
  1. Add the following to the volumes: section of your radarbox container definition:
- "radarbox_segfault_fix:/sys/class/thermal:ro"