#!/bin/sh /etc/rc.common
# Copyright (C) 2014 Noah Meyerhans <frodo@morgul.net>
# Licensed under the terms of the GNU General Public License version 2
# or (at your discretion) any later later version

USE_PROCD=1

START=22

config_file=/etc/bind/named.conf
config_dir=$(dirname $config_file)
named_options_file=/etc/bind/named-rndc.conf
rndc_conf_file=/etc/bind/rndc.conf
pid_file=/var/run/named/named.pid

logdir=/var/log/named/
cachedir=/var/cache/bind
libdir=/var/lib/bind
dyndir=/tmp/bind

conf_local_file=$dyndir/named.conf.local

fix_perms() {
    for dir in $libdir $logdir $cachedir $dyndir; do
	test -e "$dir" || {
            mkdir -p "$dir"
            chgrp bind "$dir"
            chmod g+w "$dir"
	}
    done
}

no_ipv6() {
    [ -z "$(ip -6 -o route show default)" ]
}

reload_service() {
    rndc -q reload
}

start_service() {
    user_exists bind 57 || user_add bind 57
    group_exists bind 57 || group_add bind 57
    fix_perms

    local runnamed=$(dirname $pid_file)
    # with dropped privileges, we need this created for us
    [ -d $runnamed ] || {
	mkdir -m 0755 $runnamed
	chown bind.bind $runnamed
    }

    local rndc_temp=$(mktemp /tmp/rndc-confgen.XXXXXX)

    rndc-confgen > $rndc_temp

    sed -r -n \
	-e '/^# options \{$/,/^\};$/{ s/^/# / }' \
	-e p \
	-e '/^# End of rndc\.conf$/q' \
	< $rndc_temp > $rndc_conf_file

    sed -r -n \
	-e '1,/^# End of rndc\.conf$/ { b done }' \
	-e '/^# Use with the following in named.conf/ { p ; b done }' \
	-e '/^# End of named\.conf$/ { p ; b done }' \
	-e '/^# key /,$ { s/^# // ; p }' \
	-e ': done' \
	< $rndc_temp > $named_options_file

    rm -f $rndc_temp

    touch $conf_local_file

    local args=
    no_ipv6 && args="-4"

    procd_open_instance
    procd_set_param command /usr/sbin/named -u bind -f $args -c $config_file
    procd_set_param file $config_file \
			 $config_dir/bind.keys \
			 $named_options_file \
			 $conf_local_file \
			 $config_dir/db.*
    procd_set_param respawn
    procd_close_instance
}