#!/bin/bash
#
# Jonathan Petersson <jpetersson@garnser.se>
# GPLv3
# Based on check_areca by Nikolay Diulgerov
#


CULIMIT=10000
CLLIMIT=1000

WULIMIT=8000
WLLIMIT=2000

STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3
CLI=/usr/local/sbin/cli64
EVENT_FILE=/tmp/areca_event

print_help() {
	echo ""
	echo "Usage: check_areca [-w <lower>:<upper>] [-c <lower>:<upper>] [-C <clipath>] [-h]"
	echo ""
	echo "This plugin checks the areca controller fan speed and raid volume status."
	echo "Needs /usr/local/sbin/cli64 to be installed on the linux machine."
	echo "$CLI should be owned by root.nagios with mode 750 and setuserid on execution"
	echo "$CLI can be downloaded from areca web site"
	echo "ftp://ftp.areca.com.tw/RaidCards/AP_Drivers/Linux/CLI"
}

while getopts "w:c:h" opt; do
    case $opt in
	w)
	    IFS=: read WLLIMIT WULIMIT <<< "$OPTARG" ;;
	c)
	    IFS=: read CLLIMIT CULIMIT <<< "$OPTARG" ;;
	C)
	    CLI=$OPTARG
	    exit $STATE_OK ;;
	h)
	    print_help
	    exit $STATE_OK ;;
	*)
    esac
done

if [ ! -f $CLI ]; then
    echo "Missing $CLI file."
    print_help
    exit $STATE_UNKNOWN
fi

if [[ ${direction=`echo $WLLIMIT $CLLIMIT | awk '($1 < $2) { print "above" }'`} = "above" ]] || [[ ${direction=`echo $WULIMIT $CULIMIT | awk '($1 > $2) { print "below" }'`} = "below" ]]; then
    echo "Error: WARNING value must be $direction CRITICAL value"
    print_help
    exit $STATE_UNKNOWN
fi

fan_speed_areca=`sudo $CLI hw info|grep "Fan"|grep -oP '[0-9]+?\S+'`
IFS=$'\n' read -a temperatures <<< `sudo $CLI hw info | awk '/.*C$/ { print $1":"$(NF-1) }'`

IFS=$'\n' read -a volume_status <<< `sudo $CLI vsf info|grep -i VOL|awk '{print $1":"$NF}'`
event_status=`sudo $CLI event info|grep -E ^[0-9] | awk '{ print $1" "$2 }'`
for temperature in ${temperatures[@]}; do
    IFS=: read sensor out <<< "$temperature"
    temp_perf+=($sensor=$out\;)
done
temp_perf=$(echo ${temp_perf[*]})

# Check fan
if [[ $fan_speed_areca =~ ^[0-9]+ ]]; then
    if [[ $fan_speed_areca -gt $WULIMIT ]] || [[ $fan_speed_areca -lt $WLLIMIT ]]; then
	if [[ $fan_speed_areca -gt $CULIMIT ]] || [[ $fan_speed_areca -lt $CLLIMIT ]]; then
	    exit_out+=("FAN:$STATE_CRITICAL")
	else
	    exit_out+=("FAN:$STATE_WARNING")
	fi
    fi
fi

# Check volume status
for volume in ${volume_status[*]}; do
    OLDIFS=$IFS
    IFS=:; read volid status <<< "$volume"
    IFS=$OLDIFS
    if [ "$status" != "Normal" ]; then
	volume_status="CRITICAL"
	exit_out+=("VOLUME($volid $status):$STATE_CRITICAL")
    else
	volume_status=OK
    fi
done

# Event check
new_event=0
new_date=$(date "+%s")

if [[ ! -e $EVENT_FILE ]]; then
    now_date=$new_date
else
    now_date=$(cat $EVENT_FILE)
fi

OLDIFS=$IFS
IFS=$'\n'
for i in $event_status; do
    old_date=`date -d "$i UTC -30 min" "+%s"`
    if [ $old_date -gt $now_date ]; then
	new_event=1
    fi
done
IFS=$OLDIFS

echo $new_date > $EVENT_FILE

if [ $new_event -eq 1 ]; then
    exit_out+=("EVENT:$STATE_CRITICAL")
fi

state=0

for exit in ${exit_out[*]}; do
    IFS=: read SYSTEM STATE <<< "$exit"
    system+=("$SYSTEM")
    if [[ $STATE -gt $state ]]; then
	state=$STATE
    fi
done


EXIT_CODE[0]=OK
EXIT_CODE[1]=WARNING
EXIT_CODE[2]=CRITICAL
EXIT_CODE[3]=UNKNOWN

system=$(IFS=,; echo "${system[*]}")
OUT=$(echo $state | awk '$1 > 0 { print " ("var")" }' var="$system")
if [[ $fan_speed_areca =~ ^[0-9]+ ]]; then
    FAN=" Fan speed: $fan_speed_areca -"
fi
if [[ $temperatures != "" ]]; then
    TEMP=" Temperatures: $temperatures -"
fi
echo "${EXIT_CODE[$state]}$OUT -$FAN$TEMP Volume status:$volume_status|fan=$fan_speed_areca;$temp_perf"
exit $state