Add temperature as status output, too

README.md

@@ -2,9 +2,15 @@
 
 Icinga2/Nagios check program for Raspberry Pi temperature
 
+## Requirements
+
+- `bc` for floating point calculation
+- Adding executing user to video group: `sudo adduser nagios video`. Otherwise "VCHI initialization failed"
+
 ## Arguments
 
 - `--warning 50`: Temperature above which the result is warning
 - `--critical 70`: Temperature above which the result is critical
 - `--fahrenheit`: All temperatures in Fahrenheit (°F)
 
+

check_rpi_temperature.sh

@@ -4,6 +4,12 @@
 
 echoerr() { echo "$@" 1>&2; }
 
+if ! $(command -v bc); then
+	echoerr Please install bc
+	exit -2
+fi
+
+
 WARN=50
 CRIT=70
 FAHRENHEIT=false
@@ -12,14 +18,14 @@ while [[ $# -gt 0 ]]; do
 	case $1 in
 		-w|--warn|--warning)
 			case "$2" in
-				''|*[!0-9]*) echoerr "Argument for \"$1\" has to be a number";;
+				''|*[!0-9]*) echoerr "Value for \"$1\" has to be a number"; exit -3;;
 			esac
 			WARN=$2
 			shift; shift
 			;;
 		-c|--crit|--critical)
 			case "$2" in
-				''|*[!0-9]*) echoerr "Argument for \"$1\" has to be a number";;
+				''|*[!0-9]*) echoerr "Value for \"$1\" has to be a number"; exit -3;;
 			esac
 			CRIT=$2
 			shift; shift
@@ -45,7 +51,7 @@ done
 
 if [ $CRIT -le $WARN ]; then
 	echoerr "Critical threshold ($CRIT) has to be greater than Warning threshold ($WARN)"
-	exit 1
+	exit -3
 fi
 
 
@@ -68,10 +74,10 @@ fi
 temp=${output/temp=/}
 temp=${temp/\'C/}
 
-unit="°C"
+unit="'C"
 if $FAHRENHEIT; then
 	temp=$(bc <<< "scale=1; ($temp * 1.8) + 32")
-	unit="°F"
+	unit="'F"
 fi
 
 
@@ -85,7 +91,7 @@ elif [ $w -eq 1 ]; then
 else
 	result="OK"
 fi
-echo "$result | 'temperature'=$temp;$unit;$WARN;$CRIT;-40;85"
+echo "$result. $temp$unit | 'temperature'=$temp;$unit;$WARN;$CRIT;-40;85"
 
 
 case $result in