#!/bin/bash
# Copyright (c) 2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# void system_depend(void)
#
# Sets up the dependancies for the module
system_depend() {
	after interface
	before dhcp
	variables dns_servers dns_domain dns_options dns_search dns_sortlist \
		ntp_servers nis_domain nis_servers
}

system_dns_extra() {
	local iface="$1" ifvar="$(bash_variable "$1")" out="$2" x sortlist
	local -a options
	
	x="dns_options_${ifvar}[@]"
	options=( "${!x}" )
	[[ -z ${options} ]] && options=( "${dns_options[@]}" )
	for x in "${options[@]}" ; do
		echo "options ${x}" >> "${out}"
	done

	sortlist="dns_sortlist_${ifvar}"
	[[ -z ${!sortlist} ]] && sortlist="dns_sortlist"
	[[ -n ${!sortlist} ]] && echo "sortlist ${!sortlist}" >> "${out}"
}

system_dns() {
	local iface="$1" ifvar="$(bash_variable "$1")" x domain search
	local conffile="${statedir}/${iface}/resolv.conf" tmpfile="${conffile}.$$"
	local -a servers

	servers="dns_servers_${ifvar}[@]"
	[[ -z ${!servers} ]] && servers="dns_servers[@]"
	servers="${!servers}"

	domain="dns_domain_${ifvar}"
	[[ -z ${!domain} ]] && domain="dns_domain"
	domain="${!domain}"

	search="dns_search_${ifvar}"
	[[ -z ${!search} ]] && search="dns_search"
	search="${!search}"
	
	[[ -z ${servers} && -z ${domain} && -z ${search} ]] && return 0

	echo "# Generated by net-scripts for interface ${iface}" > "${tmpfile}"
	chmod 644 "${tmpfile}"

	if [[ -n ${domain} ]] ; then
		# Strip leading and trailing spaces
		domain="${domain# *}"
		domain="${domain%* }"
		if [[ ${domain} == *" "* ]] ; then
			[[ -z ${search} ]] && search="${domain}"
			domain="${domain%% *}"
		fi
		echo "domain ${domain}" >> "${tmpfile}"
	fi

	for x in ${servers} ; do
		echo "nameserver ${x}" >> "${tmpfile}"
	done

	[[ -n ${search} ]] && echo "search ${search}" >> "${tmpfile}"

	system_dns_extra "${iface}" "${tmpfile}"

	mv "${tmpfile}" "${conffile}"
}

system_ntp() {
	local iface="$1" ifvar="$(bash_variable "$1")" x
	local conffile="${statedir}/${iface}/ntp.conf" tmpfile="${conffile}.$$"
	local -a servers

	servers="ntp_servers_${ifvar}[@]"
	[[ -z ${!servers} ]] && servers="ntp_servers[@]"
	[[ -z ${!servers} ]] && return 0

	echo "# Generated by net-scripts for interface ${iface}" > "${tmpfile}"
	chmod 644 "${tmpfile}"

	echo "restrict default noquery notrust nomodify" >> "${tmpfile}"
	echo "restrict 127.0.0.1" >> "${tmpfile}"

	for x in ${!servers} ; do
		echo "restrict ${x} nomodify notrap noquery" >> "${tmpfile}"
		echo "server ${x}" >> "${tmpfile}"
	done

	echo "driftfile /var/lib/ntp/ntp.drift" >> "${tmpfile}"
	echo "logfile /var/log/ntp.log" >> "${tmpfile}"

	mv "${tmpfile}" "${conffile}"
}

system_nis() {
	local iface="$1" ifvar="$(bash_variable "$1")" domain x
	local conffile="${statedir}/${iface}/yp.conf" tmpfile="${conffile}.$$"
	local -a servers 

	servers="nis_servers_${ifvar}[@]"
	[[ -z ${!servers} ]] && servers="nis_servers[@]"
	
	domain="nis_domain_${ifvar}"
	[[ -z ${!domain} ]] && domain="nis_domain"
	
	[[ -z ${!servers} && -z ${!domain} ]] && return 0

	echo "# Generated by net-scripts for interface ${iface}" > "${tmpfile}" 
	chmod 644 "${tmpfile}"

	if [[ -n ${!domain} ]] ; then
		hostname -y "${!domain}"
		if [[ -n ${!servers} ]] ; then
			for x in ${!servers} ; do
				echo "domain ${!domain} server ${x}" >> "${tmpfile}"
			done
		else
			echo "domain ${!domain} broadcast" >> "${tmpfile}"
		fi
	else
		for x in ${!servers} ; do
			echo "ypserver ${x}" >> "${tmpfile}"
		done
	fi

	mv "${tmpfile}" "${conffile}"
}

# bool system_post_start(char *iface)
#
# Configures the host system for dns, ntp and nis information
# Always returns 0
system_pre_start() {
	local iface="$1"

	system_dns "${iface}"
	system_ntp "${iface}"
	system_nis "${iface}"

	return 0
}

# vim:ts=4