Munin contributed plugins

#!/bin/bash

#

# Reads the signal strength from a DVB-c/s/t tuner

#

# (c) 2009 i.dobson@planet-ian.com

#

# 24.11.2009 Version 1.1 added support for multiple tuners

# 22.11.2009 Version 1.0 added check that femon iinstalled

# 21.11.2009 Version 0.9 added adapter number

# 20.11.2009 Version 0.8 first version

#

# Magic markers (optional):

#%# family=auto

#%# capabilities=autoconf suggest

#Starting point for tuner to watch

Tuner=0

case $1 in

    autoconf|detect)

       REQ=`which femon`

       if [ "$REQ" = "" ]; then

          echo "no (femon not installed)"

          exit 1

       fi

       if [ -e  /dev/dvb/adapter$Tuner/ ]; then

          echo yes

          exit 0

       else

          echo "no (dvb tuner $Tuner not found)"

          exit 1

       fi;;

    config)

      echo "graph_title  DVB signal strength"

      echo 'graph_args --base 1000 -l 0'

      echo 'graph_vlabel Signal Strength %'

      echo 'graph_category mythtv'

      echo 'graph_scale no'

      while [ -e  /dev/dvb/adapter$Tuner/ ]; do

         Tuner=$[$Tuner+1]

      done

      TunerLoop=0

      while [ $TunerLoop -lt $Tuner ] ; do

        echo "signal$TunerLoop.label Signal strength for tuner $TunerLoop"

        echo "signal$TunerLoop.draw LINE1"

        echo "signal$TunerLoop.min 0"

        TunerLoop=$[$TunerLoop+1]

      done

      TunerLoop=0

      while [ $TunerLoop -lt $Tuner ] ; do

        echo "snr$TunerLoop.label Signal to noise for tuner $TunerLoop"

        echo "snr$TunerLoop.draw LINE1"

        echo "snr$TunerLoop.min 0"

        TunerLoop=$[$TunerLoop+1]

      done

      TunerLoop=0

      while [ $TunerLoop -lt $Tuner ] ; do

        echo "ber$TunerLoop.label Bit error rate for tuner $TunerLoop"

        echo "ber$TunerLoop.draw LINE1"

        echo "ber$TunerLoop.min 0"

        echo "ber$TunerLoop.max 200"

        TunerLoop=$[$TunerLoop+1]

      done

      TunerLoop=0

      while [ $TunerLoop -lt $Tuner ] ; do

        echo "unc$TunerLoop.label Uncorrectable errors for tuner $TunerLoop"

        echo "unc$TunerLoop.draw LINE1"

        echo "unc$TunerLoop.min 0"

        echo "unc$TunerLoop.max 200"

        TunerLoop=$[$TunerLoop+1]

      done

    exit 0;;

esac

  echo "" > /tmp/dvb-signal.text

  echo "" > /tmp/dvb-signal1.text

  Tuner=0

  while [ -e  /dev/dvb/adapter$Tuner/ ] ; do

    check=`femon -c 1 -a $Tuner | grep signal `

    echo $check $Tuner| awk '{printf ("signal%.0f.value %.1f\nsnr%.0f.value %.1f\nber%.0f.value %.2f\nunc%.0f.value %.4f\n#raw values Tuner %.0f  %.0f %.0f %.0f %.0f \n",$17,strtonum("0x"$5)/655,$17,strtonum("0x"$8)/655,$17,strtonum("0x"$11),$17,strtonum("0x"$14),$17,strtonum("0x"$5),strtonum("0x"$8),$11,$14)}' >> /tmp/dvb-signal.text

    echo  $check >>  /tmp/dvb-signal1.text

    Tuner=$[$Tuner+1]

  done

  cat /tmp/dvb-signal.text | grep signal

  cat /tmp/dvb-signal.text | grep snr

  cat /tmp/dvb-signal.text | grep ber

  cat /tmp/dvb-signal.text | grep unc

  cat /tmp/dvb-signal.text | grep raw

exit 0