#!/bin/bash
#
# Plugin: sensors_
# Author: Carlos Ladeira (caladeira at gmail dot com]
# Version: 08.09.13
#
#
# This script handles the output of lm-sensors
# like this example:
#
# it87-isa-0290
# Adapter: ISA adapter
# VCore 1:   +1.49 V  (min =  +0.00 V, max =  +4.08 V)
# VCore 2:   +2.46 V  (min =  +0.00 V, max =  +4.08 V)
# +3.3V:     +3.25 V  (min =  +0.00 V, max =  +4.08 V)
# +5V:       +4.97 V  (min =  +0.00 V, max =  +6.85 V)
# +12V:     +12.22 V  (min =  +0.00 V, max = +16.32 V)
# -12V:      -1.83 V  (min = -27.36 V, max =  +3.93 V)
# -5V:       -9.48 V  (min = -13.64 V, max =  +4.03 V)
# Stdby:     +4.95 V  (min =  +0.00 V, max =  +6.85 V)
# VBat:      +3.33 V
# fan1:     3375 RPM  (min =    0 RPM, div = 8)
# fan2:        0 RPM  (min =    0 RPM, div = 8)
# fan3:        0 RPM  (min =    0 RPM, div = 2)
# M/B Temp:    +39°C  (low  =    -1°C, high =  +127°C)   sensor = thermistor
# CPU Temp:    +34°C  (low  =    -1°C, high =  +127°C)   sensor = thermistor
# Temp3:       +48°C  (low  =    -1°C, high =  +127°C)   sensor = thermistor
#
#
# Wildcard-plugin to monitor output of lm sensors.
#
# Syntax:	sensors_<type>[_ignore1[,ignore2[,...]]]
#
#		<type>	fans		monitor fans speed
#			voltages	monitor system voltages
#			temperatures	monitor system temperatures
#
#		ignore1, ignore2, ...	list of sensores to ignore
#
#
# HOW TO SETUP THIS SCRIPT
#
# 1. Start copying this script to the munin main plugin directory
#
#	sudo cp sensors_ /usr/share/munin/plugins/sensors_
#
# 2. create links in the user plugin directory with the desired setup
#    Some examples:
#
#    ln -s /usr/share/munin/plugins/sensors_ /etc/munin/plugins/sensors_fans
#    ln -s /usr/share/munin/plugins/sensors_ /etc/munin/plugins/sensors_voltages
#    ln -s /usr/share/munin/plugins/sensors_ /etc/munin/plugins/sensors_temperatures_5V,12V
#    ln -s /usr/share/munin/plugins/sensors_ /etc/munin/plugins/sensors_temperatures_Temp3
#
#
# Munin (http://munin.projects.linpro.no/) 
# lm-sensors (http://www.lm-sensors.org/)
# 
# Requirements: * lm-sensors (http://www.lm-sensors.org/)
#
#
# Changelog: v08.09.07 - initial release
#            v08.09.13 - add ignore parameter list
#
#
#%# family=contrib
#%# capabilities=autoconf suggest

##### CONSTANTS #####################################################

DETECTED_SENSORS=$(sensors -U -A | wc -l)
GCAT="sensors"

IGNORE_DELIMITER='_'

ARGS=$(basename $0 | sed -e 's/^sensors_//g')
MODE=$(echo -n $ARGS | cut -d $IGNORE_DELIMITER -f 1)
IGNORE=$(echo -n $ARGS | cut -d $IGNORE_DELIMITER -f 2)

IGNORE_LIST=""
if [ -n "$IGNORE" ] ; then
	if [ "$IGNORE" != "$MODE" ] ; then
		IGNORE_LIST="$(echo -n $IGNORE | sed -e 's/,/ /g')"
	fi
fi

case "$MODE" in

	voltages)
		LINE_FILTER=" V"
		VALUE_FILTER='V'
		GTITLE="Voltages"
		GLABEL="Volts"
	;;

	temperatures)
		LINE_FILTER="C "
		VALUE_FILTER='C'
		GTITLE="Temperatures"
		GLABEL="Celsius"
	;;

	fans)
		LINE_FILTER="RPM"
		VALUE_FILTER='R'
		GTITLE="Fans Speed"
		GLABEL="RPM"
	;;

	*)
	echo "Invalid Option: $MODE"
	exit 1

esac


#####################################################################

if [ "$1" == "autoconf" ]; then

	if [ "$DETECTED_SENSORS" -eq 0 ]; then
		echo "no"
		exit 1
	else
		echo "yes"
		exit 0
	fi

elif [ "$1" == "suggest" ]; then

	echo "voltages"
	echo "temperatures"
	echo "fans"
	exit 0

elif [ "$1" == "config" ]; then

	echo "graph_title $GTITLE"
	echo "graph_vlabel $GLABEL"
	echo "graph_category $GCAT"
	echo "graph_args --base 1000 -l 0"
	echo "graph_scale no"

	sensors | grep "$LINE_FILTER" |

	while read a; do
		label=$(echo $a | cut -d ':' -f 1 | sed -e 's/[+| |/]//g' -e 's/-/n/' -e 's/\./_/')
		name=$(echo $a | cut -d ':' -f 1)

		found=0
		for item in $IGNORE_LIST; do
			if [ "$item" == "$label" ] ; then
				found=1
			fi
		done

		if [ $found -eq 0 ] ; then
			echo $label.label $name
		fi
	done

else

	sensors | grep "$LINE_FILTER" |

	while read a; do
		label=$(echo $a | cut -d ':' -f 1 | sed -e 's/[+| |/]//g' -e 's/-/n/' -e 's/\./_/')
		value=$(echo $a | cut -d ':' -f 2 | cut -d $VALUE_FILTER -f 1 | sed -e 's/[+|[:blank:]|°|C]//g')

		found=0
		for item in $IGNORE_LIST; do
			if [ "$item" == "$label" ] ; then
				found=1
			fi
		done

		if [ $found -eq 0 ] ; then
			echo $label.value $value
		fi

	done

fi