#!/bin/sh
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   <    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk is free software;  you can redistribute it and/or modify it
# under the  terms of the  GNU General Public License  as published by
# the Free Software Foundation in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# tails. You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

# This check can be used to test the name resolution of a given host
# address using the local resolver of the system this script is
# running on.

HOSTADDRESSES=mathias-kettner.de

if [ -e $MK_CONFDIR/dnsclient.cfg ] ; then
    . $MK_CONFDIR/dnsclient.cfg
fi

echo "<<<mrpe>>>"
for HOSTADDRESS in $HOSTADDRESSES
do
    ADDRESSES=`nslookup $HOSTADDRESS | sed -n -e 1,3d -e '/^Address: *\(.*\)$/s//\1/p'`
    if [ ! "$ADDRESSES" ] ; then
        STATE=2
        OUTPUT="CRIT - $HOSTADDRESS could not be resolved"
    else
        STATE=0
        OUTPUT="OK - $HOSTADDRESS resolved into $ADDRESSES"
    fi
    echo Resolve_$HOSTADDRESS $STATE $OUTPUT
done