#! /bin/sh
#
# Author: Juergen Vigna <juergen.vigna@wuerth-phoenix.com>
#
# Plugin which first checks if a host is up and then launches the
# check of another pluging. If the host is down it will return OK
# as status with the message that the host is not reachable.
# 

export HOME=/tmp
PATH=$PATH:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin

PROGNAME=`basename $0`
PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
REVISION=`echo '$Revision: 1.1 $' | sed -e 's/[^0-9.]//g'`
TMPFILE=/tmp/cwp$$.tmp

trap 'rm -f $TMPFILE; exit 10' 1 2 15
trap 'rm -f $TMPFILE' 0

. $PROGPATH/utils.sh


print_usage() {
        echo "Usage: $PROGNAME [-m <mode>] -H <host_to_check> <plugin with options>"
}

print_help() {
        print_revision $PROGNAME $REVISION
        echo ""
        print_usage
        echo ""
        echo "Plugin which first checks if a host is up and then launches the"
	echo "check of another pluging. If the host is down it will return OK"
        echo "as status with the message that the host is not reachable."
	echo ""
	echo "-m <mode> default: ping. Possible values: ping, nrpe, nt[<port>]"
	echo "-H <ip/hostname> the host to check to see if it's up"
	echo "          the default check_nt port is 12489"
	echo "At last specify the plugin to launch with all it's parameters, if"
	echo "the plugin has no absolute path we try to find it on best effort."
        exit 0
}

resetParam() {
	if [ $1 != "HOST" ]
	then
		PHOST=""
	fi
	if [ $1 != "MODE" ]
	then
		PMODE=""
	fi
}

if [ $# -lt 2 ]
then
	print_help
	exit $STATE_UNKNOWN
fi

for param in $*
do
	case "$param" in
        --help)
                print_help
                exit 0
                ;;
	-h)
                print_help
                exit 0
                ;;
        --version)
        	print_revision $PROGNAME $REVISION
               	exit 0
               	;;
        -V)
        	print_revision $PROGNAME $REVISION
               	exit 0
               	;;
	-H)	
		PHOST="-"
		shift
		resetParam HOST	
               	;;
	-m)
		PMODE="-"
		shift
		resetParam MODE
		;;
	*)
		# if value is "-", than then current parameter
		if [ "$PHOST" == "-" ]
		then
			HOST="$param"
			PHOST=""
			shift
		elif [ "$PMODE" == "-" ]
		then
			MODE=$param
			PMODE=""
			shift
		else
			break
		fi
		;;
	esac
done

if [ -z "$HOST" ]
then
	echo "UNKNOWN - forgot to specify HOST in commandline"
	exit $STATE_UNKNOWN
fi

CMD=$1
shift

if [ -z "$CMD" ]
then
	echo "UNKNOWN - forgot to specify the plugin command with options"
	exit $STATE_UNKNOWN
fi

if [ -z "$MODE" -o "$MODE" = "ping" ]
then
	MODE=ping
	CHECKCMD=check_ping
	CHECKARG="-H $HOST -p 1 -w 100%,3000,5000 -c 100%,3000,5000"
elif [ "$MODE" = "nrpe" ]
then
	CHECKCMD=check_nrpe
	CHECKARG="-H $HOST"
elif [ "`echo $MODE | cut -c1-2`" = "nt" ]
then
	CHECKCMD=check_nt
	port="`echo $MODE | cut -c3-`"
	if [ -z "$port" ]
	then
		CHECKARG="-p 12489 -H $HOST -v CLIENTVERSION"
	else
		CHECKARG="-p $port -H $HOST -v CLIENTVERSION"
	fi
fi

if [ -x /usr/lib/nagios/plugins/$CHECKCMD ]
then
	CHECKEXE="/usr/lib/nagios/plugins/$CHECKCMD $CHECKARG"
elif [ -x $PROGPATH/$CHECKCMD ]
then
	CHECKEXE="$PROGPATH/$CHECKCMD $CHECKARG"
else
	echo "UNKNOWN - check command $CHECKCMD of mode $MODE not found"
	exit $STATE_UNKNOWN
fi

if [ ! -x $CMD ]
then
	BCMD=`basename $CMD`
	if [ -x /usr/lib/nagios/plugins/$BCMD ]
	then
		EXE="/usr/lib/nagios/plugins/$BCMD"
	elif [ -x $PROGPATH/$BCMD ]
	then
		EXE="$PROGPATH/$BCMD"
	else
		echo "UNKNOWN - plugin command $CMD not found"
		exit $STATE_UNKNOWN
	fi
else
        EXE=$CMD
fi

$CHECKEXE >/dev/null 2>&1
RET=$?

if [ $RET -ne 0 ]
then
	echo "OK - Host $HOST is down or $MODE not reachable"
	exit $STATE_OK
fi

$EXE $*
exit $?