systemd: We do not want to run the dbus-daemon, do not install the service

We have no other dbus users, do not install the dbus.service and dbus.socket
by default. It only leads to wasting a bit of ram.

recipes-fixes/systemd/systemd_sysmocom.inc

@@ -0,0 +1,31 @@
+S_THISDIR := "${@os.path.dirname(bb.data.getVar('FILE', d, True))}"
+FILESPATH =. "${@base_set_filespath(["${S_THISDIR}/${PN}"], d)}:"
+
+PRINC="12"
+
+# Disable depedency on dbus
+RDEPENDS_${PN} = ""
+
+
+# TODO: disable systemd-logind as it needs dbus
+SYSTEMD_DISABLED_NATIVE_SERVICES = " \
+  systemd-logind \
+"
+
+pkg_postinst_${PN}_append () {
+        cd $D${sysconfdir}/init.d
+
+        echo "Disabling the following native services: "
+
+        OPTS=""
+
+        if [ -n "$D" ]; then
+                OPTS="--root=$D"
+        fi
+
+        for i in ${SYSTEMD_DISABLED_NATIVE_SERVICES} ; do
+                if [ \( -e $i -o $i.sh \) -a ! -e $D${sysconfdir}/systemd/system/$i.service ] ; then
+                        echo -n "$i: " ; systemctl ${OPTS} mask $i.service
+                fi
+        done ; echo
+}

yocto-master/systemd_199.bbappend

@@ -0,0 +1 @@
+require recipes-fixes/${PN}/${PN}_sysmocom.inc