dnsmasq.in revision 1.1
1#!/bin/sh 2# Copyright (c) 2007-2009 Roy Marples 3# All rights reserved 4 5# dnsmasq 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 "$dnsmasq_conf" -o -z "$dnsmasq_resolv" ] && exit 0 32[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)" 33 34: ${dnsmasq_pid:=/var/run/dnsmasq.pid} 35: ${dnsmasq_restart:=@RESTARTCMD dnsmasq@} 36newconf="# Generated by resolvconf\n" 37newresolv="$newconf" 38 39# Using dbus means that we never have to restart the daemon 40# This is important as it means we should not drop DNS queries 41# whilst changing DNS options around. However, dbus support is optional 42# so we need to validate a few things first. 43# Check for DBus support in the binary 44dbus=false 45: ${dbus_pid:=/var/run/dbus/dbus.pid} 46[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus.pid 47[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus/pid 48if [ -s "$dbus_pid" -a -s "$dnsmasq_pid" ]; then 49 if dnsmasq --version 2>/dev/null | \ 50 grep -q "^Compile time options.*[[:space:]]DBus[[:space:]]" 51 then 52 # Sanity - check that dnsmasq and dbus are running 53 if kill -0 $(cat "$dbus_pid") 2>/dev/null && \ 54 kill -0 $(cat "$dnsmasq_pid") 2>/dev/null 55 then 56 dbus=true 57 newconf="$newconf\n# Domain specific servers will" 58 newconf="$newconf be sent over dbus\nenable-dbus\n" 59 fi 60 fi 61fi 62 63for n in $NAMESERVERS; do 64 newresolv="${newresolv}nameserver $n\n" 65done 66 67dbusdest= 68for d in $DOMAINS; do 69 dn="${d%%:*}" 70 ns="${d#*:}" 71 while [ -n "$ns" ]; do 72 if $dbus; then 73 SIFS=${IFS-y} OIFS=$IFS 74 IFS=. 75 set -- ${ns%%,*} 76 num="0x$(printf "%02x" $1 $2 $3 $4)" 77 if [ "$SIFS" = yi ]; then 78 unset IFS 79 else 80 IFS=$OIFS 81 fi 82 dbusdest="$dbusdest uint32:$(printf "%u" $num)" 83 dbusdest="$dbusdest string:$dn" 84 else 85 newconf="${newconf}server=/$dn/${ns%%,*}\n" 86 fi 87 [ "$ns" = "${ns#*,}" ] && break 88 ns="${ns#*,}" 89 done 90done 91 92changed=false 93if [ ! -f "$dnsmasq_conf" ] || \ 94 [ "$(cat "$dnsmasq_conf")" != "$(printf "$newconf")" ] 95then 96 changed=true 97 printf "$newconf" >"$dnsmasq_conf" 98fi 99if [ -f "$dnsmasq_resolv" ]; then 100 if [ "$(cat "$dnsmasq_resolv")" != "$(printf "$newresolv")" ]; then 101 changed=true 102 printf "$newresolv" >"$dnsmasq_resolv" 103 fi 104else 105 # dnsmasq polls this file so no need to set changed=true 106 printf "$newresolv" >"$dnsmasq_resolv" 107fi 108 109if $changed; then 110 eval $dnsmasq_restart 111fi 112if $dbus; then 113 $restart || kill -HUP $(cat "$dnsmasq_pid") 114 # Send even if empty so old servers are cleared 115 dbus-send --system --dest=uk.org.thekelleys.dnsmasq \ 116 /uk/org/thekelleys/dnsmasq uk.org.thekelleys.SetServers \ 117 $dbusdest 118fi 119