1#!/bin/sh
2# Copyright (c) 2007-2009 Roy Marples
3# All rights reserved
4
5# named subscriber for resolvconf
6
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions
9# are met:
10#     * Redistributions of source code must retain the above copyright
11#       notice, this list of conditions and the following disclaimer.
12#     * Redistributions in binary form must reproduce the above
13#       copyright notice, this list of conditions and the following
14#       disclaimer in the documentation and/or other materials provided
15#       with the distribution.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29[ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
30. "@SYSCONFDIR@/resolvconf.conf" || exit 1
31[ -z "$named_zones" -a -z "$named_options" ] && exit 0
32[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)"
33NL="
34"
35
36# Platform specific kludges
37if [ -z "$named_service" -a -z "$named_restart" -a \
38	-d "@RCDIR@" -a ! -x "@RCDIR@"/named ]
39then
40	if [ -x "@RCDIR@"/bind9 ]; then
41		# Debian and derivatives
42		named_service=bind9
43	fi
44fi
45: ${named_service:=named}
46: ${named_restart:=@RESTARTCMD ${named_service}@}
47newoptions="# Generated by resolvconf$NL"
48newzones="$newoptions"
49
50forward=
51for n in $NAMESERVERS; do
52	case "$forward" in
53	*"$NL	$n;"*);;
54	*) forward="$forward$NL	$n;";;
55	esac
56done
57if [ -n "$forward" ]; then
58	newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL"
59fi
60
61for d in $DOMAINS; do
62	newzones="${newzones}zone \"${d%%:*}\" {$NL"
63	newzones="$newzones	type forward;$NL"
64	newzones="$newzones	forward first;$NL	forwarders {$NL"
65	ns="${d#*:}"
66	while [ -n "$ns" ]; do
67		newzones="$newzones		${ns%%,*};$NL"
68		[ "$ns" = "${ns#*,}" ] && break
69		ns="${ns#*,}"
70	done
71	newzones="$newzones	};$NL};$NL"
72done
73
74# No point in changing files or reloading bind if the end result has not
75# changed
76changed=false
77if [ -n "$named_options" ]; then
78	if [ ! -f "$named_options" ] || \
79		[ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ]
80	then
81		printf %s "$newoptions" >"$named_options"
82		changed=true
83	fi
84fi
85if [ -n "$named_zones" ]; then
86	if [ ! -f "$named_zones" ] || \
87		[ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ]
88	then
89		printf %s "$newzones" >"$named_zones"
90		changed=true
91	fi
92fi
93
94if $changed; then
95	eval $named_restart
96fi
97