128 lines
4.0 KiB
Bash
128 lines
4.0 KiB
Bash
#!/bin/sh
|
|
# Copyright (c) 2007-2009 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 "@SYSCONFDIR@"/resolvconf.conf ] || exit 0
|
|
. "@SYSCONFDIR@/resolvconf.conf" || exit 1
|
|
[ -z "$dnsmasq_conf" -a -z "$dnsmasq_resolv" ] && exit 0
|
|
[ -z "$RESOLVCONF" ] && eval "$(@PREFIX@/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:=@RESTARTCMD ${dnsmasq_service}@}
|
|
newconf="# Generated by resolvconf$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
|
|
newconf="$newconf$NL# Domain specific servers will"
|
|
newconf="$newconf be sent over dbus${NL}enable-dbus$NL"
|
|
fi
|
|
fi
|
|
fi
|
|
|
|
for n in $NAMESERVERS; do
|
|
newresolv="${newresolv}nameserver $n$NL"
|
|
done
|
|
|
|
dbusdest=
|
|
for d in $DOMAINS; do
|
|
dn="${d%%:*}"
|
|
ns="${d#*:}"
|
|
while [ -n "$ns" ]; do
|
|
if $dbus; then
|
|
SIFS=${IFS-y} OIFS=$IFS
|
|
IFS=.
|
|
set -- ${ns%%,*}
|
|
num="0x$(printf %02x $1 $2 $3 $4)"
|
|
if [ "$SIFS" = yi ]; then
|
|
unset IFS
|
|
else
|
|
IFS=$OIFS
|
|
fi
|
|
dbusdest="$dbusdest uint32:$(printf %u $num)"
|
|
dbusdest="$dbusdest string:$dn"
|
|
else
|
|
newconf="${newconf}server=/$dn/${ns%%,*}$NL"
|
|
fi
|
|
[ "$ns" = "${ns#*,}" ] && break
|
|
ns="${ns#*,}"
|
|
done
|
|
done
|
|
|
|
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 "$dnsmasq_resolv" ]; then
|
|
if [ -f "$dnsmasq_resolv" ]; then
|
|
if [ "$(cat "$dnsmasq_resolv")" != "$(printf %s "$newresolv")" ]
|
|
then
|
|
changed=true
|
|
printf %s "$newresolv" >"$dnsmasq_resolv"
|
|
fi
|
|
else
|
|
# dnsmasq polls this file so no need to set changed=true
|
|
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
|