dnsmasq: get systemd only working again

The changes made in commit 2497cf2960537152427c99629b2af412787eb6c2
[dnsmasq: steal resolvconf support from Ubuntu] broke systemd only
dnsmasq runtime. No sysvinit scripts are included in systemd only
builds (and should not be) and the dnsmasq executable has not moved to
/usr/sbin.

Reverting to the previous version of the systemd service file. If
folks want the local dnsmasq instance to be queried before going to
an external DNS they should add 'nameserver 127.0.0.1' to
/etc/resolv.conf. Or submit a change which will work with systemd.

Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com>
Acked-by: Anders Darander <anders@chargestorm.se>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Joe MacDonald <joe_macdonald@mentor.com>
(cherry picked from commit 237ade5065aee5290288febfbbae90145c2c7764)

5 files changed, 108 insertions, 23 deletions

diff --git a/meta-networking/recipes-support/dnsmasq/dnsmasq.inc b/meta-networking/recipes-support/dnsmasq/dnsmasq.inc
index 622e63067..cc7f9e3be 100644
--- a/meta-networking/recipes-support/dnsmasq/dnsmasq.inc
+++ b/meta-networking/recipes-support/dnsmasq/dnsmasq.inc
@@ -10,7 +10,8 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=0636e73ff0215e8d672dc4c32c317bb3 \
 SRC_URI = "http://www.thekelleys.org.uk/dnsmasq/${@['archive/', ''][float(d.getVar('PV',1).split('.')[1]) > 15]}dnsmasq-${PV}.tar.gz;name=dnsmasq-${PV} \
            file://init \
            file://dnsmasq.conf \
-           file://dnsmasq.service \
+           file://dnsmasq-resolvconf.service \
+           file://dnsmasq-noresolvconf.service \
 "
 
 inherit pkgconfig update-rc.d systemd
@@ -33,7 +34,7 @@ EXTRA_OEMAKE = "\
     'LDFLAGS=${LDFLAGS}' \
 "
 
-SRC_URI += "${@bb.utils.contains('PACKAGECONFIG', 'resolvconf', 'file://dnsmasq.resolvconf file://99_dnsmasq', '', d)}"
+SRC_URI += "${@bb.utils.contains('PACKAGECONFIG', 'resolvconf', 'file://dnsmasq.resolvconf file://99_dnsmasq file://dnsmasq-resolvconf-helper', '', d)}"
 
 do_compile_append() {
     # build dhcp_release
@@ -51,7 +52,12 @@ do_install () {
     install -m 755 ${WORKDIR}/init ${D}${sysconfdir}/init.d/dnsmasq
 
     install -d ${D}${systemd_unitdir}/system
-    install -m 0644 ${WORKDIR}/dnsmasq.service ${D}${systemd_unitdir}/system
+
+    if [ "${@base_contains('PACKAGECONFIG', 'resolvconf', 'resolvconf', '', d)}" != "" ]; then
+        install -m 0644 ${WORKDIR}/dnsmasq-resolvconf.service ${D}${systemd_unitdir}/system/dnsmasq.service
+    else
+        install -m 0644 ${WORKDIR}/dnsmasq-noresolvconf.service ${D}${systemd_unitdir}/system/dnsmasq.service
+    fi
 
     install -m 0755 ${S}/contrib/wrt/dhcp_release ${D}${bindir}
 
@@ -60,11 +66,12 @@ do_install () {
         install -m 644 dbus/dnsmasq.conf ${D}${sysconfdir}/dbus-1/system.d/
     fi
     if [ "${@base_contains('PACKAGECONFIG', 'resolvconf', 'resolvconf', '', d)}" != "" ]; then
-        install -d ${D}${sysconfdir}/resolvconf/update.d/
-        install -m 0755 ${WORKDIR}/dnsmasq.resolvconf ${D}${sysconfdir}/resolvconf/update.d/dnsmasq
+        install -d ${D}${sysconfdir}/resolvconf/update.d/
+        install -m 0755 ${WORKDIR}/dnsmasq.resolvconf ${D}${sysconfdir}/resolvconf/update.d/dnsmasq
 
-        install -d ${D}${sysconfdir}/default/volatiles
-        install -m 0644 ${WORKDIR}/99_dnsmasq ${D}${sysconfdir}/default/volatiles
+        install -d ${D}${sysconfdir}/default/volatiles
+        install -m 0644 ${WORKDIR}/99_dnsmasq ${D}${sysconfdir}/default/volatiles
+        install -m 0755 ${WORKDIR}/dnsmasq-resolvconf-helper ${D}${bindir}
     fi
 }
 
diff --git a/meta-networking/recipes-support/dnsmasq/files/dnsmasq-noresolvconf.service b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-noresolvconf.service
new file mode 100644
index 000000000..cde2244c8
--- /dev/null
+++ b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-noresolvconf.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=DNS forwarder and DHCP server
+After=network.target
+
+[Service]
+Type=forking
+PIDFile=/run/dnsmasq.pid
+ExecStartPre=/usr/bin/dnsmasq --test
+ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid
+ExecStop=/bin/kill $MAINPID
+ExecReload=/bin/kill -HUP $MAINPID
+
+[Install]
+WantedBy=multi-user.target
+
diff --git a/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf-helper b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf-helper
new file mode 100644
index 000000000..db54d467e
--- /dev/null
+++ b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf-helper
@@ -0,0 +1,62 @@
+#!/bin/bash
+#
+# Borrowing heavily from the dnsmasq initscript's version of support for
+# resolvconf, intended for use in systemd-only configurations.
+#
+PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
+DAEMON=/usr/sbin/dnsmasq
+NAME=dnsmasq
+
+# Most configuration options in /etc/default/dnsmasq are deprecated
+# but still honoured.
+if [ -r /etc/default/$NAME ]; then
+   . /etc/default/$NAME
+fi
+
+start_resolvconf()
+{
+   # If interface "lo" is explicitly disabled in /etc/default/dnsmasq
+   # Then dnsmasq won't be providing local DNS, so don't add it to
+   # the resolvconf server set.
+   for interface in $DNSMASQ_EXCEPT
+   do
+      [ $interface = lo ] && return
+   done
+
+   if [ -x /sbin/resolvconf ] ; then
+      echo "nameserver 127.0.0.1" |
+      /sbin/resolvconf -a lo.$NAME
+   fi
+   return 0
+}
+
+stop_resolvconf()
+{
+   if [ -x /sbin/resolvconf ] ; then
+      /sbin/resolvconf -d lo.$NAME
+   fi
+   return 0
+}
+
+case "$1" in
+   start)
+      start_resolvconf
+      exit 0
+      ;;
+   stop)
+      stop_resolvconf
+      exit 0
+      ;;
+   restart)
+      stop_resolvconf
+      start_resolvconf
+      exit 0
+      ;;
+   *)
+      echo "Usage: /etc/init.d/$NAME {start|stop|restart}" >&2
+      exit 3
+      ;;
+esac
+
+exit 0
+
diff --git a/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf.service b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf.service
new file mode 100644
index 000000000..68b175c1f
--- /dev/null
+++ b/meta-networking/recipes-support/dnsmasq/files/dnsmasq-resolvconf.service
@@ -0,0 +1,17 @@
+[Unit]
+Description=DNS forwarder and DHCP server
+After=network.target
+
+[Service]
+Type=forking
+PIDFile=/run/dnsmasq.pid
+ExecStartPre=/usr/bin/dnsmasq --test
+ExecStart=/usr/bin/dnsmasq -x /run/dnsmasq.pid
+ExecStartPost=/usr/bin/dnsmasq-resolvconf-helper start
+ExecStopPre=/usr/bin/dnsmasq-resolvconf-helper stop
+ExecStop=/bin/kill $MAINPID
+ExecReload=/bin/kill -HUP $MAINPID
+
+[Install]
+WantedBy=multi-user.target
+
diff --git a/meta-networking/recipes-support/dnsmasq/files/dnsmasq.service b/meta-networking/recipes-support/dnsmasq/files/dnsmasq.service
deleted file mode 100644
index c3637e142..000000000
--- a/meta-networking/recipes-support/dnsmasq/files/dnsmasq.service
+++ /dev/null
@@ -1,16 +0,0 @@
-[Unit]
-Description=DNS forwarder and DHCP server
-After=network.target
-
-[Service]
-Type=forking
-PIDFile=/run/dnsmasq.pid
-ExecStartPre=/usr/sbin/dnsmasq --test
-ExecStart=/etc/init.d/dnsmasq systemd-exec
-ExecStartPost=/etc/init.d/dnsmasq systemd-start-resolvconf
-ExecStopPre=/etc/init.d/dnsmasq systemd-stop-resolvconf
-ExecReload=/bin/kill -HUP $MAINPID
-
-[Install]
-WantedBy=multi-user.target
-