Bumped the version to 1.2 after Onkobu's updates

Argument order irrelevant/ sensor parsing improved/ fixed multi-sensor and added new-style/old-style parsing

HISTORY

@@ -0,0 +1,46 @@
+Version 0.2: 
+   Line 103, fixed the missing "-n" option (Thanks to Chad who pointed this out
+   this out for me). Also added a "shopt -s extglob". (Thx to Chad)
+
+Version 0.5: 
+   Line 168, fixed a typo (EXIT_UNKNOWN to STATE_UNKNOWN)
+
+Version 0.7:
+   Line 193, modified sensor parsing to cut after the first '+' since all
+     positive temperatures are preceded by a '+'
+   Line 211, reduced "verbosity" needed to see verbose info (was 2: -v -v)
+   Line 229-232, now checks to see if no sensor data was found and
+     exits with STATE_UNKNOWN
+
+Version 0.8:
+   Line 196 and 230, added 'head -n1' to only fetch the first result from
+     sensors output. On some machine you get two Core0 and two Core1 temps.
+   Moved version history to it's own file, HISTORY
+
+Version 0.94:
+    Lots of changes and bugfixes. A huge thank you to Ryan Loudfoot who
+    has fixed bugs and worked out a new way to detect the sensors-program.
+    In 0.94 I removed /etc from the whereis path as it didn't work for me
+    on my setup. It found the config-file for lm-sensors and tried to run
+    it.
+
+Version 0.95:
+    Changed the Performance Data Field to only contain a label and the
+    actual value in celsius. For example, "temperature=39".
+
+Version 1.0:
+    Several improvements made by Nikodimos, including:
+     - Added support for multiple sensors
+     - Enriched performance data output. For example, "CPU=34;40;55 MB=32;40;55"
+     - Changed (and improved) the way temperatures are retrieved
+     - Other fixes and touch-ups, such as the help text now shows long options
+
+Version 1.1:
+	Improvements for Icinga 2, made by Onkobu
+	 - order of arguments is irrelevant now, --sensor first ignored following -c & -w
+	 - current sensors' multiline output needs sophisticated treatment
+
+Version 1.2:
+   Improvements for Icinga 2, made by Onkobu
+   - Added the ability to switch between old and new style with an -n option
+   - Fixed multi-sensor with identical thresholds

README

@@ -1,10 +1,38 @@
 check_temp
 
 A small Nagios plugin that checks the CPU (or M/B) temperature with lm-sensors.
-It's written in Bash and uses some sed & awk.
-Default is to check the CPU temperature but this can be changed to for example 
+It's written in Bash and uses *nix "sensors" and some sed & awk.
+Default is to check the CPU temperature but this can be changed to, for example, 
 the motherboard temperature with a "--sensor" argument. 
 The plugin complies with the guidelines, for example uses -w -c -v arguments 
-etc. It also does some basic sanity checks and has a exit 3 catchall.
+etc. It also does some basic sanity checks and has a exit 3 catch-all.
 
-The plugin were submitted to Nagios Exchange in 2011.
+The plugin was submitted to Nagios Exchange in 2011.
+
+Known forks of check_temp:
+There is a very good Perl fork of check_temp written by Chad Columbus. It's
+available on Nagios Exchange at
+http://exchange.nagios.org/directory/Plugins/Operating-Systems/Linux/check_temp-2Epl/details
+
+Required:
+1) Install lm-sensors:
+  a) On Debian/Ubuntu... apt-get install lm-sensors
+  b) On OpenSUSE etc... zypper in sensors
+
+2) Run sensors-detect:
+  sudo sensors-detect
+
+Let it check for any sensors that you feel are necessary, or all. You can just
+press <ENTER> to have it use the default option for each check. There is a
+warning in the manpages (man sensors-detect) that there are (some rare)
+hardware sensors that may lock up or even be permanently damaged, so be aware
+of that.
+
+**********
+MAKE SURE YOU TYPE "YES" TO THE LAST OPTION: "Do you want to add these lines automatically to /etc/modules? (yes/NO)"
+**********
+ 
+3) Restart module-init-tools service (On Debian/Ubuntu)
+  a) /etc/init.d/module-init-tools restart
+    or
+  b) service module-init-tools restart

THANKS

@@ -1,9 +1,12 @@
 check_temp THANKS file
 
 check_temp was originally written by Jack-Benny Persson.
-Some kind people has been contributing by reporting problems, suggesting
+Some kind people have been contributing by reporting problems, suggesting
 improvements or submitting code.
 Here is a list of these kind people.
 
 Chad Columbus   ccolumbu@hotmail.com
-
+Ryan Loudfoot   elyrith@gmail.com
+Nikodimos       kikniknik on Github
+Shakalandy      shakalandy on Github
+Onkobu Tanaake  onkobu on Github

check_temp.sh

@@ -24,22 +24,33 @@
 #                                                                             #	
 # Nagios plugin to monitor CPU and M/B temperature with sensors.              #
 # Written in Bash (and uses sed & awk).                                       #
-# Version 0.2: Line 98, fixed the missing "-n" option (Thanks to Chad who     #
-# pointed this out for me). Also added a "shopt -s extglob". (Thx to Chad)    #
-# Version 0.5: Line 162, fixed a typo (EXIT_UNKNOWN to STATE_UNKNOWN)         #
+# Latest version of check_temp can be found at the below URL:                 #
+# https://github.com/jackbenny/check_temp                                     #
+#                                                                             #
+# If you are having problems getting it to work, check the instructions in    #
+# the README first. It walks you though install lm-sensors and getting it to  #
+# display sensor data.                                                        #
+#                                                                             #
 ###############################################################################
 
-VERSION="Version 0.5"
-AUTHOR="(c) 2011 Jack-Benny Persson (jack-benny@cyberinfo.se)"
+VERSION="Version 1.2"
+AUTHOR="(c) 2011 Jack-Benny Persson (jack-benny@cyberinfo.se), (c) 2020 Onkobu Tanaake (oss@onkobutanaake.de)"
 
 # Sensor program
-SENSORPROG=/usr/bin/sensors
+SENSORPROG=$(whereis -b -B /{bin,sbin,usr} /{bin,sbin,usr}/* -f sensors | awk '{print $2}')
 
-# Exit codes
+# Ryan's note: utils.sh is installed with nagios-plugins in with the plugins
+# Check if utils.sh exists. This lets you use check_domain in a testing environment
+# or outside of Nagios.
+if [ -e "$PROGPATH/utils.sh" ]; then
+	. "$PROGPATH/utils.sh"
+else
 	STATE_OK=0
 	STATE_WARNING=1
 	STATE_CRITICAL=2
 	STATE_UNKNOWN=3
+#	STATE_DEPENDENT=4    (Commented because it's unused.)
+fi
 
 shopt -s extglob
 
@@ -48,32 +59,42 @@ shopt -s extglob
 # Print version information
 print_version()
 {
-	printf "\n\n$0 - $VERSION\n"
+	echo "$0 - $VERSION"
 }
 
 #Print help information
 print_help()
 {
 	print_version
-	printf "$AUTHOR\n"
-	printf "Monitor temperatur with the use of sensors\n"
+	echo "$AUTHOR"
+	echo "Monitor temperature with the use of sensors"
 /bin/cat <<EOT
 
 Options:
--h
+-h, --help
    Print detailed help screen
--V
+-V, --version
    Print version information
--v
+-v, --verbose
    Verbose output
 
---sensor WORD
+-s, --sensor <WORD[,DISPLAY_NAME]>
    Set what to monitor, for example CPU or MB (or M/B). Check sensors for the
-   correct word. Default is CPU.
--w INTEGER
-   Exit with WARNING status if above INTEGER degres
--c INTEGER
-   Exit with CRITICAL status if above INTEGER degres
+   correct word. Default is CPU. A different display name can be used in output,
+   by adding it next to sensor with a comma.
+   It can be used more than once, with different warning/critical thresholds optionally.
+-w, --warning <INTEGER>
+   Exit with WARNING status if above INTEGER degrees
+-c, --critical <INTEGER>
+   Exit with CRITICAL status if above INTEGER degrees
+   Warning and critical thresholds must be provided before the corresponding --sensor option.
+-n
+   Use the new sed based filter in case classic filter yields no temperature.
+
+Examples:
+./check_temp.sh [-n] -w 65 -c 75 --sensor CPU
+./check_temp.sh [-n] -w 65 -c 75 --sensor CPU --sensor temp1
+./check_temp.sh [-n] -w 65 -c 75 --sensor CPU -w 75 -c 85 --sensor temp1,GPU
 EOT
 }
 
@@ -85,14 +106,92 @@ thresh_warn=
 # Critical threshold
 thresh_crit=
 # Hardware to monitor
-sensor=CPU
+default_sensor="CPU"
+sensor_declared=false
+
+STATE=$STATE_OK
 
 # See if we have sensors program installed and can execute it
 if [[ ! -x "$SENSORPROG" ]]; then
-	printf "\nIt appears you don't have sensors installed in $SENSORPROG\n"
-	exit $STATE_UNKOWN
+	echo "It appears you don't have lm-sensors installed. You may find help in the readme for this script."
+	exit $STATE_UNKNOWN
 fi
 
+function set_state {
+	[[ "$STATE" -lt "$1" ]] && STATE=$1 
+}
+
+function process_sensor {
+	sensor=$(echo $1 | cut -d, -f1)
+	sensor_display=$(echo $1 | cut -d, -f2)
+	# Check if a sensor were specified
+	if [[ -z "$sensor" ]]; then
+		# No sensor to monitor were specified
+		echo "No sensor specified"
+		print_help
+		exit $STATE_UNKNOWN
+	fi
+
+	# Check if the thresholds have been set correctly
+	if [[ -z "$thresh_warn" || -z "$thresh_crit" ]]; then
+		# One or both thresholds were not specified
+		echo "Threshold not set"
+		print_help
+		exit $STATE_UNKNOWN
+	  elif [[ "$thresh_crit" -lt "$thresh_warn" ]]; then
+		# The warning threshold must be lower than the critical threshold
+		echo "Warning temperature should be lower than critical"
+		print_help
+		exit $STATE_UNKNOWN
+	fi
+	# Get the temperature
+	# Grep the first float with a plus sign and keep only the integer
+	if [ $CLASSIC_FILTER -eq 1 ]; then
+		WHOLE_TEMP=$(${SENSORPROG} | grep "$sensor" | head -n1 | grep -o "+[0-9]\+\(\.[0-9]\+\)\?[^ \t,()]*" | head -n1)
+	else
+		WHOLE_TEMP=$(${SENSORPROG} -A "$sensor" | sed -n '2 p' | grep -o "+[0-9]\+\(\.[0-9]\+\)\?[^ \t,()]*" | head -n1)
+	fi
+	TEMPF=$(echo "$WHOLE_TEMP" | grep -o "[0-9]\+\(\.[0-9]\+\)\?")
+	TEMP=$(echo "$TEMPF" | cut -d. -f1)
+
+	# Verbose output
+	if [[ "$verbosity" -ge 1 ]]; then
+	   /bin/cat <<__EOT
+	Debugging information:
+	  Warning threshold: $thresh_warn 
+	  Critical threshold: $thresh_crit
+	  Verbosity level: $verbosity
+	  Current $sensor temperature: $TEMP
+__EOT
+	echo "Temperature lines directly from sensors:"
+	${SENSORPROG}
+	fi
+	
+	# Get performance data for Nagios "Performance Data" field
+	PERFDATA="$PERFDATA $sensor_display=$TEMP;$thresh_warn;$thresh_crit"
+
+	# And finally check the temperature against our thresholds
+	if [[ "$TEMP" != +([0-9]) ]]; then
+		# Temperature not found for that sensor
+		OUTPUT_TEXT="$OUTPUT_TEXT, No data found for sensor ($sensor)"
+		set_state $STATE_UNKNOWN
+	elif [[ "$TEMP" -gt "$thresh_crit" ]]; then
+		# Temperature is above critical threshold
+		OUTPUT_TEXT="$OUTPUT_TEXT, $sensor_display has temperature: $WHOLE_TEMP"
+		set_state $STATE_CRITICAL
+	elif [[ "$TEMP" -gt "$thresh_warn" ]]; then
+		# Temperature is above warning threshold
+		OUTPUT_TEXT="$OUTPUT_TEXT, $sensor_display has temperature: $WHOLE_TEMP"
+		set_state $STATE_WARNING
+	else
+		# Temperature is ok
+		OUTPUT_TEXT="$OUTPUT_TEXT, $sensor_display has temperature: $WHOLE_TEMP"
+		set_state $STATE_OK
+	fi
+}
+
+CLASSIC_FILTER=1
+
 # Parse command line options
 while [[ -n "$1" ]]; do 
    case "$1" in
@@ -115,7 +214,7 @@ while [[ -n "$1" ]]; do
        -w | --warning)
            if [[ -z "$2" ]]; then
                # Threshold not provided
-               printf "\nOption $1 requires an argument"
+               echo "Option $1 requires an argument"
                print_help
                exit $STATE_UNKNOWN
             elif [[ "$2" = +([0-9]) ]]; then
@@ -123,7 +222,7 @@ while [[ -n "$1" ]]; do
                thresh=$2
             else
                # Threshold is not an integer
-               printf "\nThreshold must be an integer"
+               echo "Threshold must be an integer"
                print_help
                exit $STATE_UNKNOWN
            fi
@@ -134,7 +233,7 @@ while [[ -n "$1" ]]; do
        -c | --critical)
            if [[ -z "$2" ]]; then
                # Threshold not provided
-               printf "\nOption '$1' requires an argument"
+               echo "Option '$1' requires an argument"
                print_help
                exit $STATE_UNKNOWN
             elif [[ "$2" = +([0-9]) ]]; then
@@ -142,7 +241,7 @@ while [[ -n "$1" ]]; do
                thresh=$2
             else
                # Threshold is not an integer
-               printf "\nThreshold must be an integer"
+               echo "Threshold must be an integer"
                print_help
                exit $STATE_UNKNOWN
            fi
@@ -150,86 +249,47 @@ while [[ -n "$1" ]]; do
 	   shift 2
            ;;
 
-       -?)
-           print_help
-           exit $STATE_OK
-           ;;
-
-       --sensor)
+       -s | --sensor)
 	   if [[ -z "$2" ]]; then
-		printf "\nOption $1 requires an argument"
+		echo "Option $1 requires an argument"
 		print_help
 		exit $STATE_UNKNOWN
 	   fi
-		sensor=$2
+	   sensor_declared=true
+	   sensors_to_check="$2"
            shift 2
            ;;
 
+	   -n | --new-filter)
+		   CLASSIC_FILTER=0
+		   shift 1
+		   ;;
        *)
-           printf "\nInvalid option '$1'"
+           echo "Invalid option '$1'"
            print_help
            exit $STATE_UNKNOWN
            ;;
    esac
+
+   # argument order is irrelevant, Icinga2 gives no guarantees
+   # as soon as there are enough output is generated
+   if [ ! -z "$thresh_warn" ] && [ ! -z "$thresh_crit" ] && [ ! -z "$sensors_to_check" -o $# -eq 0 ]; then
+	if [ "$sensor_declared" = false ]; then
+		process_sensor "$default_sensor"
+	else
+		process_sensor "$sensors_to_check"
+	fi
+   fi
 done
 
 
-# Check if a sensor were specified
-if [[ -z "$sensor" ]]; then
-	# No sensor to monitor were specified
-	printf "\nNo sensor specified"
-	print_help
-	exit $STATE_UNKNOWN
-fi
+case "$STATE" in
+	"$STATE_OK") STATE_TEXT="OK" ;;
+	"$STATE_WARNING") STATE_TEXT="WARNING" ;;
+	"$STATE_CRITICAL") STATE_TEXT="CRITICAL" ;;
+	"$STATE_UNKNOWN") STATE_TEXT="UNKNOWN" ;;
+esac
 
-
-#Get the temperature
-TEMP=`${SENSORPROG} | grep "$sensor Temp" | awk '{print $3}' | cut -c2-3`
-
-
-# Check if the tresholds has been set correctly
-if [[ -z "$thresh_warn" || -z "$thresh_crit" ]]; then
-	# One or both thresholds were not specified
-	printf "\nThreshold not set"
-	print_help
-	exit $STATE_UNKNOWN
-  elif [[ "$thresh_crit" -lt "$thresh_warn" ]]; then
-	# The warning threshold must be lower than the critical threshold
-	printf "\nWarning temperature should be lower than critical"
-	print_help
-	exit $STATE_UNKNOWN
-fi
-
-
-# Verbose output
-if [[ "$verbosity" -ge 2 ]]; then
-   /bin/cat <<__EOT
-Debugging information:
-  Warning threshold: $thresh_warn 
-  Critical threshold: $thresh_crit
-  Verbosity level: $verbosity
-  Current $sensor temperature: $TEMP
-__EOT
-printf "\n  Temperature lines directly from sensors:\n"
-${SENSORPROG} | grep "Temp"
-printf "\n\n"
-fi
-
-
-# And finally check the temperature against our thresholds
-if [[ "$TEMP" -gt "$thresh_crit" ]]; then
-	# Temperature is above critical threshold
-	echo "$sensor CRITICAL - Temperature is $TEMP"
-	exit $STATE_CRITICAL
-
-  elif [[ "$TEMP" -gt "$thresh_warn" ]]; then
-	# Temperature is above warning threshold
-	echo "$sensor WARNING - Temperature is $TEMP"
-	exit $STATE_WARNING
-
-  else
-	# Temperature is ok
-	echo "$sensor OK - Temperature is $TEMP"
-	exit $STATE_OK
-fi
-exit 3
+OUTPUT_TEXT=$(echo $OUTPUT_TEXT | sed -e 's/, //')
+echo "TEMPERATURE $STATE_TEXT - $OUTPUT_TEXT |$PERFDATA"
+exit $STATE