#!/bin/bash
# 
#  debupdates.sh
#  Nagios SNMP debian updates monitoring plugin.
#  
#  Created by CoolCold < coolcold@coolcold.org > on 2007-09-17.
# 
#  parameters:
#  <host> <community>
#
#  example: ./debupdates.sh rainbow.local public
#

# -------------------------------------------------------------------
# Constants
SNMP_GET="/usr/bin/snmpget"

OID_FAIL=".1.3.6.1.4.1.2021.71.100.1"
OID_MESG=".1.3.6.1.4.1.2021.71.101.1"

NAGIOS_OK=0
NAGIOS_WARN=1
NAGIOS_CRIT=2
NAGIOS_UNKN=3

E_NOOID="Object"
# -------------------------------------------------------------------
# default values
infoline="OK"
extcode="$NAGIOS_OK"
errmsg=""
# -------------------------------------------------------------------
# checking arguments...
ARGS=2
E_BADARGS="$NAGIOS_UNKN"

if [[ $# -lt "$ARGS" ]]
then
    echo "usage: `basename $0` <host> <community>"
    echo "`basename $0` rainbow.local public"
    exit $E_BADARGS
fi
# -------------------------------------------------------------------
COMMUNITY=$2
HOST=$1

#if
	# SNMP query.
	STATUS_INFO=`$SNMP_GET -v2c -c $COMMUNITY -Ovq $HOST $OID_FAIL 2>&1`
	RETVAL_INFO="$?"
	STATUS_EXTD=`$SNMP_GET -v2c -c $COMMUNITY -Ovq $HOST $OID_MESG 2>&1`
	RETVAL_EXTD="$?"

	if [[ "$RETVAL_INFO" != "0" ]]
	then
	    # Status SNMP query failed.
	    infoline="UNKNOWN"
	    errmsg="$STATUS_INFO"
	    extcode="$NAGIOS_UNKN"
	    echo "debian updates check on $HOST is $infoline: $errmsg"
	    exit $extcode
	fi

	if [[ "$RETVAL_EXTD" != "0" || "x$STATUS_INFO" == "x1" ]]
	then
	    # Extended status SNMP query failed.
	    infoline="UNKNOWN"
	    errmsg="$STATUS_EXTD"
	    extcode="$NAGIOS_UNKN"
	    echo "debian updates check on $HOST is $infoline: $errmsg"
	    exit $extcode
	fi
	#echo "$STATUS_INFO and $STATUS_EXTD"

	UPDATES_STATUS=`echo $STATUS_EXTD|awk '{ print $3 }'`
	#echo "updates status: $UPDATES_STATUS"
	extcode=`echo $STATUS_EXTD|awk '{ print $1 }'|sed 's/"//'`
	#echo "exit code:"
	#echo `echo $STATUS_EXTD|awk '{print $1}'|sed 's/"//'`

	# Check if we got 'No Such Instance currently exists at this OID'.
	if [[ "$UPDATES_STATUS" = "$E_NOOID" ]]
	then
	    infoline="UNKNOWN"
	    errmsg="$STATUS_EXTD"
	    extcode="$NAGIOS_UNKN"
	    echo "debian updates check on $HOST is $infoline: $errmsg"
	    exit $extcode
	fi
#fi

# If we have some updates, mark them as warning/critical
# let's return what remote script provided...

# Output and we're done.
infoline=`echo $STATUS_EXTD|awk '{ORS=" "; for(i = 2 ; i <= NF ; i++) print $i}'|sed 's/"//'`
#echo "$STATUS_EXTD"
#infoline="$STATUS_EXTD"
echo "debian updates check on $HOST is $infoline"
exit $extcode