creating config files for nagios

addhost.sh

#!/bin/bash
while IFS=, read -r host ip cont _ <&3; do
	parent=${ip%.*}.1
	TMPL=HOST-TEST.tmpl
	FILE=$host.cfg
	awk \
		-v HOST="$host" \
		-v CONT="$cont" \
		-v PARENT="$parent" \
		-v IP="$ip" \
		'{
			sub("HOSTNAME", HOST, $0);
			sub("CONTACTGROUP", CONT, $0);
			sub("PARENT", PARENT, $0);
			sub("IPADDR", IP, $0);
			print $0;
		}' <"$TMPL" >"$FILE"
done 3< servers.csv