/lib/resolvconf/dnsmasq is in openresolv 3.5.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | #!/bin/sh
# Copyright (c) 2007-2012 Roy Marples
# All rights reserved
# dnsmasq subscriber for resolvconf
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
[ -f "/etc"/resolvconf.conf ] || exit 0
. "/etc/resolvconf.conf" || exit 1
[ -z "$dnsmasq_conf" -a -z "$dnsmasq_resolv" ] && exit 0
[ -z "$RESOLVCONF" ] && eval "$(/sbin/resolvconf -v)"
NL="
"
: ${dnsmasq_pid:=/var/run/dnsmasq.pid}
[ -s "$dnsmasq_pid" ] || dnsmasq_pid=/var/run/dnsmasq/dnsmasq.pid
: ${dnsmasq_service:=dnsmasq}
: ${dnsmasq_restart:=if /usr/sbin/invoke-rc.d --quiet ${dnsmasq_service} status >/dev/null 2>&1; then /usr/sbin/invoke-rc.d ${dnsmasq_service} restart; fi}
newconf="# Generated by resolvconf$NL"
newresolv="$newconf"
# Using dbus means that we never have to restart the daemon
# This is important as it means we should not drop DNS queries
# whilst changing DNS options around. However, dbus support is optional
# so we need to validate a few things first.
# Check for DBus support in the binary
dbus=false
: ${dbus_pid:=/var/run/dbus/dbus.pid}
[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus.pid
[ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus/pid
if [ -s "$dbus_pid" -a -s "$dnsmasq_pid" ]; then
if dnsmasq --version 2>/dev/null | \
grep -q "^Compile time options.*[[:space:]]DBus[[:space:]]"
then
# Sanity - check that dnsmasq and dbus are running
if kill -0 $(cat "$dbus_pid") 2>/dev/null && \
kill -0 $(cat "$dnsmasq_pid") 2>/dev/null
then
dbus=true
fi
fi
fi
for n in $NAMESERVERS; do
newresolv="${newresolv}nameserver $n$NL"
done
dbusdest=
conf=
for d in $DOMAINS; do
dn="${d%%:*}"
ns="${d#*:}"
n="${ns%%,*}"
while [ -n "$ns" ]; do
case "$n" in
*.*.*.*)
SIFS=${IFS-y} OIFS=$IFS
IFS=.
set -- $n
num="0x$(printf %02x $1 $2 $3 $4)"
if [ "$SIFS" = y ]; then
unset IFS
else
IFS=$OIFS
fi
dbusdest="$dbusdest uint32:$(printf %u $num)"
dbusdest="$dbusdest string:$dn"
;;
*:*:*:*:*:*:*:*)
SIFS=${IFS-y} OIFS=$IFS bytes=
IFS=:
set -- $n
while [ -n "$1" ]; do
addr="$1"
shift
while [ ${#addr} -lt 4 ]; do
addr="0${addr}"
done
byte1="$(printf %d 0x${addr%??})"
byte2="$(printf %d 0x${addr#??})"
dbusdest="$dbusdest byte:$byte1 byte:$byte2"
done
if [ "$SIFS" = y ]; then
unset IFS
else
IFS=$OIFS
fi
dbusdest="$dbusdest string:$dn"
;;
*)
dbus=false
;;
esac
conf="${conf}server=/$dn/$n$NL"
[ "$ns" = "${ns#*,}" ] && break
ns="${ns#*,}"
done
done
if $dbus; then
newconf="$newconf$NL# Domain specific servers will"
newconf="$newconf be sent over dbus${NL}enable-dbus$NL"
else
newconf="$newconf$conf"
fi
# Try to ensure that config dirs exist
if type config_mkdirs >/dev/null 2>&1; then
config_mkdirs "$dnsmasq_conf" "$dnsmasq_resolv"
else
/sbin/resolvconf -D "$dnsmasq_conf" "$dnsmasq_resolv"
fi
changed=false
if [ -n "$dnsmasq_conf" ]; then
if [ ! -f "$dnsmasq_conf" ] || \
[ "$(cat "$dnsmasq_conf")" != "$(printf %s "$newconf")" ]
then
changed=true
printf %s "$newconf" >"$dnsmasq_conf"
fi
fi
if [ -n "$dnsmasq_resolv" ]; then
# dnsmasq polls this file so no need to set changed=true
if [ -f "$dnsmasq_resolv" ]; then
if [ "$(cat "$dnsmasq_resolv")" != "$(printf %s "$newresolv")" ]
then
printf %s "$newresolv" >"$dnsmasq_resolv"
fi
else
printf %s "$newresolv" >"$dnsmasq_resolv"
fi
fi
if $changed; then
eval $dnsmasq_restart
fi
if $dbus; then
$changed || kill -HUP $(cat "$dnsmasq_pid")
# Send even if empty so old servers are cleared
dbus-send --system --dest=uk.org.thekelleys.dnsmasq \
/uk/org/thekelleys/dnsmasq uk.org.thekelleys.SetServers \
$dbusdest
fi
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