Nagios Check simfs

#!/bin/sh
#
# Plugin to check simfs disk space
# by christian vallee (cv@valtechnologie.com)
# Nagios script to check simfs usage on linux server
# version 1.1.1
#
##########################################################

##########################################################
# We call them functions because they’re fun
##########################################################

print_help() {
cat << EOF Linux SimFS Plugin for Nagios Copyright (c) Christian Vallee (cv@valtechnologie.com) Version: 1.1.1 Last Modified: 25-02-2014 License: This software can be used for free unless I meet you, then you owe me lunch. Usage: check_simfs -w [warning %] -c [critical %] Options: -w [0-99] = Your warning %. 20 means 20% of your memory can remain before a warning alarm. Do not use the % sign. -c [0-99] = Your critical %. 10 means 10% of your memory can remain before a critical alarm. Do not use the % sign. EOF } invalid_type() { echo "\nInvalid $1\n" print_help exit 3 } ############################################## ## Suck in the user input ############################################## while test -n "$1"; do case $1 in --help) print_help ; exit 0 ;; -h) print_help ; exit 0 ;; -w) WARN=$2; shift ;; -c) CRIT=$2 ;; esac shift done ############################################## ## Set the defaults if needed ############################################## [ -z "$WARN" ] && WARN=20 [ -z "$CRIT" ] && CRIT=10 ############################################## ## Check user input ############################################## echo $WARN | grep -v [0-9.] > /dev/null && invalid_type warning
echo $CRIT | grep -v [0-9.] > /dev/null && invalid_type critical
[ “${WARN%.*}” -ge 100 ] && invalid_type warning
[ “${CRIT%.*}” -ge 100 ] && invalid_type critical
[ “${CRIT%.*}” -lt “${WARN%.*}” ] && invalid_type critical

##############################################
## Do the work
## Pull the memory file into awk
## grab the lines we need
## Print the information
##############################################

RESULT=$(df -h | grep simfs | awk -v warn=$WARN -v crit=$CRIT ‘{
len = length($5)
useddiskspace = substr($5, 0, len-1)
}
END {
if ( useddiskspace <= warn ) { result="OK" ; xit="0"} if ( useddiskspace > warn ) {
if ( useddiskspace <= crit ) { result="WARNING" ; xit="1" } else if ( useddiskspace > crit ) { result=”CRITICAL” ; xit=”2″ }
}
{print xit” DISK SPACE “result” – “useddiskspace”% ” $0}
}’)

echo ${RESULT#* }
exit ${RESULT%% *}

…
command[check_simfs]=/usr/lib64/nagios/plugins/check_simfs -w 70 -c 90
…