check_snmp_perf.bash

#!/usr/bin/env bash

oid=""
community=""
host=""
label=""
unit=""

while getopts "C:H:o:l:u:" o; do
    case "${o}" in
        C)
		community="$OPTARG"
           ;;
        H)
		host="$OPTARG"
            ;;
        o)
		oid="$OPTARG"
            ;;
        l)
		label="$OPTARG"
            ;;
        u)
                unit="$OPTARG"
            ;;
    esac
done

result=$(snmpget -v2c -c $community -Oq -mALL "$host" "$oid" 2> /dev/null)

if [[ $? != 0 ]]; then
	echo "SNMP UNKNOWN - $?"
	exit 3
else
	declare -a 'a=('"$result"')'


	name=${a[0]}
	value=${a[1]}
	unitsnmp=${a[2]}

	if [[ "$label" != "" ]]; then
		name="$label"
	fi

	if [[ "$unit" != "" ]]; then
		unitsnmp="$unit"
	fi
fi

echo "SNMP OK - $name $value $unitsnmp | '$name'=$value"