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#!/bin/bash
# Written by Damien Gy
# damien.gy+nagiosexchange(AT)gmail.com
# 2007-09-28
PROGNAME=`basename $0`
REVISION=1.00
TMP=/tmp/tmpdig
DIG=/usr/bin/dig
print_revision() {
echo $PROGNAME $REVISION
}
print_usage() {
echo "Usage:"
echo " $PROGNAME -c|--check <host> <type> <server>"
echo " $PROGNAME -h|--help"
echo " $PROGNAME -v|--version"
}
print_help() {
print_revision
echo ""
print_usage
echo "Where:"
echo " host the name of the resource record to be looked up"
echo " type indicates the query required (any, a, mx, etc.)"
echo " server the name or IP address of the name server to query"
echo ""
echo " -h|--help prints this help screen"
echo ""
echo " -v|--version prints version and license information"
echo ""
echo " Created by Damien Gy, questions or problems e-mail damien.gy+nagiosexchange(AT)gmail.com"
echo ""
}
check_dns() {
if [ $# -ne 3 ]
then
echo "Number of arguments incorrect"
exit 3
fi
if [ ! -e $DIG ]
then
echo "$DIG not found"
exit 3
fi
$DIG $1 $2 @$3 > $TMP
if ( grep "status" $TMP > /dev/null )
then
# DNS server answered
if ( grep "NOERROR" $TMP > /dev/null )
then
echo "DNS OK "`grep "time:" $TMP`
rm -f $TMP
exit 0
else
echo "WARNING "`grep "time:" $TMP`
rm -f $TMP
exit 1
fi
else
# no answer
echo "CRITICAL - Connection timed out"
rm -f $TMP
exit 2
fi
}
case "$1" in
--help)
print_help
exit 0
;;
-h)
print_help
exit 0
;;
--version)
print_revision
exit 0
;;
-v)
print_revision
exit 0
;;
--check)
check_dns $2 $3 $4
;;
-c)
check_dns $2 $3 $4
;;
*)
print_usage
exit 3
esac
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