#!/bin/bash
# FILE:       	wgapi:back/lib/ns/lookup/send
# DESCRIPTION:	Send nslookup command to DNS master server
# USAGE:      	send cmd
# ERRORS:
# 	3: bad usage
# 	4: not found
# 	5: server down
# 	6: nslookup not found
# 	7: config file not found
# 	8: other nslookup error

CONFIG_FILE='/etc/wgapi/config'
[ ${#} -eq 1 ] || exit 3
[ -f "${CONFIG_FILE}" ] || exit 7
[ -x /usr/bin/nslookup ] || exit 6
source "${CONFIG_FILE}"

if ! res="$(/usr/bin/nslookup "${1}" "${DNS_MASTER}")"
	then exit 8
fi
if <<<"${res}" grep ';; .* timed out'
	then exit 5
elif <<<"${res}" grep "\*\* .*: NXDOMAIN\|\*\*\* .*: No answer"
	then exit 4
else printf '%s' "${res}"
fi