#!/bin/bash
# -*- bash -*-

: << =cut

=head1 NAME

1wire - Plugin to capture readings from 1wire sensors on raspberry pi

=head1 NOTES

=head1 AUTHOR

Contributed by Florian Klemenz

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

if [ "$1" = "autoconf" ]; then
        echo yes
        exit 0
fi

if [ "$1" = "config" ]; then
        echo 'graph_title 1wire sensor readings'
        echo 'graph_args --base 1 -l 0 '
        echo 'graph_scale no'
        echo 'graph_vlabel °C'
        echo 'graph_category temperature'
        echo 'temp.label Vorratskammer'
        echo 'temp.draw LINE'
        print_warning temp
        print_critical temp
        exit 0
fi

SENSORS=()

FILES=$(find -L /sys/bus/w1/devices/ -maxdepth 2 -name temperature)
for f in $FILES
do
    s=${f%/*}
    s=${s##*-}
    v=$(cat $f)
    
    SENSORS+=("${s} ${v}")
done

for ROW in "${SENSORS[@]}"; do
    ENTRY=( $ROW )
    SENSOR=${ENTRY[0]}
    VALUE=${ENTRY[1]/#[0-9][0-9]/&.}

        # Overrides SENSOR - Example: env.sensor_0_0 Batterie
        ENV_SENSOR_VAR_NAME="alias_${SENSOR}"
        ENV_SENSOR_NAME=${!ENV_SENSOR_VAR_NAME}

        if [ -n "${ENV_SENSOR_NAME}" ]; then
		    echo "${ENV_SENSOR_NAME}.value ${VALUE}"
        else
    		    echo "${SENSOR}.value ${VALUE}"
        fi
done