#!/bin/bash

if [ -f /etc/portstatus.conf ]; then
	. /etc/portstatus.conf
fi
PSPATH=${PSPATH:-"/var/state/portstatus/"}				; if [ ! -d "$PSPATH" ]; then mkdir -p $PSPATH ; fi
HOSTSFILE=${HOSTSFILE:-"/var/state/portstatus/hosts"}	; if [ ! -f "$HOSTSFILE" ]; then touch $HOSTSFILE ; fi
HOSTWARNTIME=${HOSTWARNTIME:-"0 0 5 0"}
SERVICEWARNTIME=${SERVICEWARNTIME:-"0 0 5 0"}
WARNEMAIL=${WARNEMAIL:-"root@localhost"}

mtimeof () {
#parameter is a file, returns space separated days, hours, minutes and seconds of modification time.
#${ONENET%%/*} = stuff before / , ${ONENET##*/} = stuff after /
#Modify: Fri Feb 25 22:51:45 2000(00000.00:30:08)
	if [ -d "$1" ] || [ -f "$1" ]; then
		STATLINE=`stat $1 2>/dev/null | grep '^Modify'`		# | sed -e 's/.*(//' -e 's/)//'
		STATLINE=${STATLINE##*(}	#Keep stuff after (
		STATLINE=${STATLINE%%)*}	#Keep stuff before ), i.e. drop last paren
		#echo STATLINE=$STATLINE
		MDAYS=${STATLINE%%.*}		; STATLINE=${STATLINE##*.}
		MHOURS=${STATLINE%%:*}		; STATLINE=${STATLINE#*:}
		MMINUTES=${STATLINE%%:*}	#No need to do any more with STATLINE from here on.
		MSECONDS=${STATLINE#*:}
		#echo $MDAYS days, $MHOURS hours, $MMINUTES minutes, $MSECONDS seconds.
		echo $MDAYS $MHOURS $MMINUTES $MSECONDS
	else
		echo "99999 99 99 99"
	fi
}

timelt () {
#parameters are two times: days1 hours1 minutes1 seconds1 days2 hours2 minutes2 seconds2
	  if [ $1 -lt $5 ]; then return 0	#True
	elif [ $1 -gt $5 ]; then return 1	#False
	fi
	  if [ $2 -lt $6 ]; then return 0	#True
	elif [ $2 -gt $6 ]; then return 1	#False
	fi
	  if [ $3 -lt $7 ]; then return 0	#True
	elif [ $3 -gt $7 ]; then return 1	#False
	fi
	  if [ $4 -lt $8 ]; then return 0	#True
	elif [ $4 -gt $8 ]; then return 1	#False
	fi
	return 1	#False (they're equal)
}

clear
for ONEIP in `cat $HOSTSFILE | grep '##' | sed -e 's/#.*//' | awk '{print $1}'` ; do
	HOSTSTATUS=''
	SERVICESTATUS=''
	HOSTLINE=`egrep "^$ONEIP[^0-9]" $HOSTSFILE | tail --lines=1`
	HOSTNAME=`echo $HOSTLINE | sed -e 's/#.*//' | awk '{print $2}'`
	HOSTNAME=${HOSTNAME:-$ONEIP}
#FIXME - extra comments after services?
	CHECKSERVICES=`echo $HOSTLINE | sed -e 's/.*##//' -e 's/,/ /'`
	HOSTTIME=`mtimeof $PSPATH/$ONEIP/HOST-REACHABLE`
	echo $HOSTNAME - $HOSTTIME

	#check host reachable, whine if not, check services if so.
	if ! timelt $HOSTTIME $HOSTWARNTIME ; then
		HOSTSTATUS="unreachable for $HOSTTIME"
	else
		for SERVICE in $CHECKSERVICES ; do
			MTIME=`mtimeof $PSPATH/$ONEIP/$SERVICE`
			if ! timelt $MTIME $SERVICEWARNTIME ; then	#If more than 5 minutes since last connect then
				SERVICESTATUS="$SERVICESTATUS $SERVICE($MTIME)"
				echo -e "\t$SERVICE\t$MTIME" ; echo -n -e "\a"
			fi
		done
	fi
	if [ -n "$HOSTSTATUS$SERVICESTATUS" ]; then
		if [ -n "$SERVICESTATUS" ]; then
			SERVICESTATUS="services:$SERVICESTATUS down"
		fi
		mail -s "$HOSTNAME $HOSTSTATUS $SERVICESTATUS" $WARNEMAIL </dev/null 2>/dev/null
	fi
done

#echo -n -e "\a"