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46
HISTORY
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@ -1,46 +0,0 @@
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

36
README
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@ -1,38 +1,10 @@
check_temp
A small Nagios plugin that checks the CPU (or M/B) temperature with lm-sensors.
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,
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
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 catch-all.
etc. It also does some basic sanity checks and has a exit 3 catchall.
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
The plugin were submitted to Nagios Exchange in 2011.

7
THANKS
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@ -1,12 +1,9 @@
check_temp THANKS file
check_temp was originally written by Jack-Benny Persson.
Some kind people have been contributing by reporting problems, suggesting
Some kind people has 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

254
check_temp.sh
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@ -24,33 +24,22 @@
# #
# Nagios plugin to monitor CPU and M/B temperature with sensors. #
# Written in Bash (and uses sed & awk). #
# 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 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) #
###############################################################################
VERSION="Version 1.2"
AUTHOR="(c) 2011 Jack-Benny Persson (jack-benny@cyberinfo.se), (c) 2020 Onkobu Tanaake (oss@onkobutanaake.de)"
VERSION="Version 0.5"
AUTHOR="(c) 2011 Jack-Benny Persson (jack-benny@cyberinfo.se)"
# Sensor program
SENSORPROG=$(whereis -b -B /{bin,sbin,usr} /{bin,sbin,usr}/* -f sensors | awk '{print $2}')
SENSORPROG=/usr/bin/sensors
# Ryan's note: utils.sh is installed with nagios-plugins in with the plugins
# Check if utils.sh exists. This lets you use check_domain in a testing environment
# or outside of Nagios.
if [ -e "$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
# Exit codes
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
shopt -s extglob
@ -59,42 +48,32 @@ shopt -s extglob
# Print version information
print_version()
{
echo "$0 - $VERSION"
printf "\n\n$0 - $VERSION\n"
}
#Print help information
print_help()
{
print_version
echo "$AUTHOR"
echo "Monitor temperature with the use of sensors"
printf "$AUTHOR\n"
printf "Monitor temperatur with the use of sensors\n"
/bin/cat <<EOT
Options:
-h, --help
-h
Print detailed help screen
-V, --version
-V
Print version information
-v, --verbose
-v
Verbose output
-s, --sensor <WORD[,DISPLAY_NAME]>
--sensor WORD
Set what to monitor, for example CPU or MB (or M/B). Check sensors for the
correct word. Default is CPU. A different display name can be used in output,
by adding it next to sensor with a comma.
It can be used more than once, with different warning/critical thresholds optionally.
-w, --warning <INTEGER>
Exit with WARNING status if above INTEGER degrees
-c, --critical <INTEGER>
Exit with CRITICAL status if above INTEGER degrees
Warning and critical thresholds must be provided before the corresponding --sensor option.
-n
Use the new sed based filter in case classic filter yields no temperature.
Examples:
./check_temp.sh [-n] -w 65 -c 75 --sensor CPU
./check_temp.sh [-n] -w 65 -c 75 --sensor CPU --sensor temp1
./check_temp.sh [-n] -w 65 -c 75 --sensor CPU -w 75 -c 85 --sensor temp1,GPU
correct word. Default is CPU.
-w INTEGER
Exit with WARNING status if above INTEGER degres
-c INTEGER
Exit with CRITICAL status if above INTEGER degres
EOT
}
@ -106,92 +85,14 @@ thresh_warn=
# Critical threshold
thresh_crit=
# Hardware to monitor
default_sensor="CPU"
sensor_declared=false
STATE=$STATE_OK
sensor=CPU
# See if we have sensors program installed and can execute it
if [[ ! -x "$SENSORPROG" ]]; then
echo "It appears you don't have lm-sensors installed. You may find help in the readme for this script."
exit $STATE_UNKNOWN
printf "\nIt appears you don't have sensors installed in $SENSORPROG\n"
exit $STATE_UNKOWN
fi
function set_state {
[[ "$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
@ -214,7 +115,7 @@ while [[ -n "$1" ]]; do
-w | --warning)
if [[ -z "$2" ]]; then
# Threshold not provided
echo "Option $1 requires an argument"
printf "\nOption $1 requires an argument"
print_help
exit $STATE_UNKNOWN
elif [[ "$2" = +([0-9]) ]]; then
@ -222,7 +123,7 @@ while [[ -n "$1" ]]; do
thresh=$2
else
# Threshold is not an integer
echo "Threshold must be an integer"
printf "\nThreshold must be an integer"
print_help
exit $STATE_UNKNOWN
fi
@ -233,7 +134,7 @@ while [[ -n "$1" ]]; do
-c | --critical)
if [[ -z "$2" ]]; then
# Threshold not provided
echo "Option '$1' requires an argument"
printf "\nOption '$1' requires an argument"
print_help
exit $STATE_UNKNOWN
elif [[ "$2" = +([0-9]) ]]; then
@ -241,7 +142,7 @@ while [[ -n "$1" ]]; do
thresh=$2
else
# Threshold is not an integer
echo "Threshold must be an integer"
printf "\nThreshold must be an integer"
print_help
exit $STATE_UNKNOWN
fi
@ -249,47 +150,86 @@ while [[ -n "$1" ]]; do
shift 2
;;
-s | --sensor)
-?)
print_help
exit $STATE_OK
;;
--sensor)
if [[ -z "$2" ]]; then
echo "Option $1 requires an argument"
printf "\nOption $1 requires an argument"
print_help
exit $STATE_UNKNOWN
fi
sensor_declared=true
sensors_to_check="$2"
sensor=$2
shift 2
;;
-n | --new-filter)
CLASSIC_FILTER=0
shift 1
;;
*)
echo "Invalid option '$1'"
printf "\nInvalid 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
case "$STATE" in
"$STATE_OK") STATE_TEXT="OK" ;;
"$STATE_WARNING") STATE_TEXT="WARNING" ;;
"$STATE_CRITICAL") STATE_TEXT="CRITICAL" ;;
"$STATE_UNKNOWN") STATE_TEXT="UNKNOWN" ;;
esac
# Check if a sensor were specified
if [[ -z "$sensor" ]]; then
# No sensor to monitor were specified
printf "\nNo sensor specified"
print_help
exit $STATE_UNKNOWN
fi
OUTPUT_TEXT=$(echo $OUTPUT_TEXT | sed -e 's/, //')
echo "TEMPERATURE $STATE_TEXT - $OUTPUT_TEXT |$PERFDATA"
exit $STATE
#Get the temperature
TEMP=`${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