1#!/bin/sh 2# Copyright (c) 2007-2023 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 "${named_zones}${named_options}" ] && exit 0 32[ -z "$RESOLVCONF" ] && eval "$(@SBINDIR@/resolvconf -v)" 33NL=" 34" 35 36# Platform specific kludges 37if [ -z "${named_service}${named_restart}" ] && 38 [ -d "$RCDIR" ] && ! [ -x "$RCDIR"/named ] 39then 40 if [ -x "$RCDIR"/bind9 ]; then 41 # Debian and derivatives 42 named_service=bind9 43 elif [ -x "$RCDIR"/rc.bind ]; then 44 # Slackware 45 named_service=rc.bind 46 fi 47fi 48: ${named_service:=named} 49 50: ${named_pid:=/var/run/$named_service.pid} 51[ -s "$named_pid" ] || named_pid=/var/run/$named_service/$named_service.pid 52[ -s "$named_pid" ] || unset named_pid 53 54newoptions="# Generated by resolvconf$NL" 55newzones="$newoptions" 56 57forward= 58for n in $NAMESERVERS; do 59 case "$forward" in 60 *"$NL $n;"*);; 61 *) forward="$forward$NL $n;";; 62 esac 63done 64if [ -n "$forward" ]; then 65 newoptions="${newoptions}forward first;${NL}forwarders {$forward${NL}};$NL" 66fi 67 68for d in $DOMAINS; do 69 newzones="${newzones}zone \"${d%%:*}\" {$NL" 70 newzones="$newzones type forward;$NL" 71 newzones="$newzones forward first;$NL forwarders {$NL" 72 ns="${d#*:}" 73 while [ -n "$ns" ]; do 74 newzones="$newzones ${ns%%,*};$NL" 75 [ "$ns" = "${ns#*,}" ] && break 76 ns="${ns#*,}" 77 done 78 newzones="$newzones };$NL};$NL" 79done 80 81# Try to ensure that config dirs exist 82if command -v config_mkdirs >/dev/null 2>&1; then 83 config_mkdirs "$named_options" "$named_zones" 84else 85 @SBINDIR@/resolvconf -D "$named_options" "$named_zones" 86fi 87 88# No point in changing files or reloading bind if the end result has not 89# changed 90changed=false 91if [ -n "$named_options" ]; then 92 if [ ! -f "$named_options" ] || \ 93 [ "$(cat "$named_options")" != "$(printf %s "$newoptions")" ] 94 then 95 printf %s "$newoptions" >"$named_options" 96 changed=true 97 fi 98fi 99if [ -n "$named_zones" ]; then 100 if [ ! -f "$named_zones" ] || \ 101 [ "$(cat "$named_zones")" != "$(printf %s "$newzones")" ] 102 then 103 printf %s "$newzones" >"$named_zones" 104 changed=true 105 fi 106fi 107 108# named does not seem to work with SIGHUP which is a same 109if $changed; then 110 if [ -n "$named_restart" ]; then 111 eval $named_restart 112 elif [ -n "$RESTARTCMD" ]; then 113 set -- ${named_service} 114 eval "$RESTARTCMD" 115 else 116 @SBINDIR@/resolvconf -r ${named_service} 117 fi 118fi 119