2 # Copyright (c) 2007-2012 Roy Marples
5 # dnsmasq subscriber for resolvconf
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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.
29 [ -f "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
30 . "@SYSCONFDIR@/resolvconf.conf" || exit 1
31 [ -z "$dnsmasq_conf" -a -z "$dnsmasq_resolv" ] && exit 0
32 [ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/sbin/resolvconf -v)"
36 : ${dnsmasq_pid:=/var/run/dnsmasq.pid}
37 [ -s "$dnsmasq_pid" ] || dnsmasq_pid=/var/run/dnsmasq/dnsmasq.pid
38 : ${dnsmasq_service:=dnsmasq}
39 : ${dnsmasq_restart:=@RESTARTCMD ${dnsmasq_service}@}
40 newconf="# Generated by resolvconf$NL"
43 # Using dbus means that we never have to restart the daemon
44 # This is important as it means we should not drop DNS queries
45 # whilst changing DNS options around. However, dbus support is optional
46 # so we need to validate a few things first.
47 # Check for DBus support in the binary
49 : ${dbus_pid:=/var/run/dbus/dbus.pid}
50 [ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus.pid
51 [ -s "$dbus_pid" ] || dbus_pid=/var/run/dbus/pid
52 if [ -s "$dbus_pid" -a -s "$dnsmasq_pid" ]; then
53 if dnsmasq --version 2>/dev/null | \
54 grep -q "^Compile time options.*[[:space:]]DBus[[:space:]]"
56 # Sanity - check that dnsmasq and dbus are running
57 if kill -0 $(cat "$dbus_pid") 2>/dev/null && \
58 kill -0 $(cat "$dnsmasq_pid") 2>/dev/null
65 for n in $NAMESERVERS; do
66 newresolv="${newresolv}nameserver $n$NL"
75 while [ -n "$ns" ]; do
78 SIFS=${IFS-y} OIFS=$IFS
81 num="0x$(printf %02x $1 $2 $3 $4)"
82 if [ "$SIFS" = y ]; then
87 dbusdest="$dbusdest uint32:$(printf %u $num)"
88 dbusdest="$dbusdest string:$dn"
91 SIFS=${IFS-y} OIFS=$IFS bytes=
97 while [ ${#addr} -lt 4 ]; do
100 byte1="$(printf %d 0x${addr%??})"
101 byte2="$(printf %d 0x${addr#??})"
102 dbusdest="$dbusdest byte:$byte1 byte:$byte2"
104 if [ "$SIFS" = y ]; then
109 dbusdest="$dbusdest string:$dn"
115 conf="${conf}server=/$dn/$n$NL"
116 [ "$ns" = "${ns#*,}" ] && break
122 newconf="$newconf$NL# Domain specific servers will"
123 newconf="$newconf be sent over dbus${NL}enable-dbus$NL"
125 newconf="$newconf$conf"
128 # Try to ensure that config dirs exist
129 if type config_mkdirs >/dev/null 2>&1; then
130 config_mkdirs "$dnsmasq_conf" "$dnsmasq_resolv"
132 @PREFIX@/sbin/resolvconf -D "$dnsmasq_conf" "$dnsmasq_resolv"
136 if [ -n "$dnsmasq_conf" ]; then
137 if [ ! -f "$dnsmasq_conf" ] || \
138 [ "$(cat "$dnsmasq_conf")" != "$(printf %s "$newconf")" ]
141 printf %s "$newconf" >"$dnsmasq_conf"
144 if [ -n "$dnsmasq_resolv" ]; then
145 if [ -f "$dnsmasq_resolv" ]; then
146 if [ "$(cat "$dnsmasq_resolv")" != "$(printf %s "$newresolv")" ]
149 printf %s "$newresolv" >"$dnsmasq_resolv"
152 # dnsmasq polls this file so no need to set changed=true
153 printf %s "$newresolv" >"$dnsmasq_resolv"
158 eval $dnsmasq_restart
161 $changed || kill -HUP $(cat "$dnsmasq_pid")
162 # Send even if empty so old servers are cleared
163 dbus-send --system --dest=uk.org.thekelleys.dnsmasq \
164 /uk/org/thekelleys/dnsmasq uk.org.thekelleys.SetServers \