#!/bin/bash
# FILE:       	wagon:back/lib/ns_lookup_rdns
# DESCRIPTION:	Get a domain from an IP address
# USAGE:      	rdns ip
# OUTPUT:     	The domain for that IP
# ERRORS:
# 	3: Not found
# 	4: Server down
# 	5: nslookup not found
# 	6: Bad usage

source /etc/wagon/config

domain="$(/usr/lib/wagon/ns_lookup_send "${1}")"
case $? in
	0) printf '%s' "${domain%.}" | cut -d'=' -f2 | xargs -0; exit 0;;
	4) printf 'Domain for %s not found!\n' "${1}" >&2; exit 3;;
	5) printf 'Nameserver not available: %s\n' "${DNS_MASTER}" >&2; exit 4;;
	6) printf 'nslookup not installed!\n' >&2; exit 5;;
	*) printf 'Bad usage: %s %s\n' "${0}" "${@}" >&2; exit 6;;
esac