06dbus: introduce dbus support

dracut.spec

@@ -349,6 +349,7 @@ install -m 0755 51-dracut-rescue-postinst.sh $RPM_BUILD_ROOT%{_sysconfdir}/kerne
 %{dracutlibdir}/modules.d/04watchdog
 %{dracutlibdir}/modules.d/04watchdog-modules
 %{dracutlibdir}/modules.d/05busybox
+%{dracutlibdir}/modules.d/06dbus
 %{dracutlibdir}/modules.d/06rngd
 %{dracutlibdir}/modules.d/10i18n
 %{dracutlibdir}/modules.d/30convertfs

modules.d/06dbus/dbus-cleanup.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+systemctl stop dbus.service dbus.socket
+rm -rf /run/dbus

modules.d/06dbus/module-setup.sh

@@ -0,0 +1,83 @@
+#!/bin/bash
+
+# called by dracut
+check() {
+  require_binaries dbus-daemon || return 1
+
+  return 255
+}
+
+depends() {
+  echo systemd
+  return 0
+}
+
+install() {
+  local DBUS_SERVICE=/usr/lib/systemd/system/dbus.service
+  if [[ -e $DBUS_SERVICE ]]; then
+    if [[ -L $DBUS_SERVICE ]]; then
+      DBUS_SERVICE=$(readlink $DBUS_SERVICE)
+    fi
+  else
+    DBUS_SERVICE=/etc/systemd/system/dbus.service
+    if [[ -e $DBUS_SERVICE ]]; then
+      if [[ -L $DBUS_SERVICE ]]; then
+        DBUS_SERVICE=$(readlink $DBUS_SERVICE)
+      fi
+    else
+      echo "Could not find dbus.service";
+      exit 1
+    fi
+  fi
+
+  inst_multiple \
+    $DBUS_SERVICE \
+    /usr/lib/systemd/system/dbus.socket \
+    /usr/bin/dbus-daemon \
+    /usr/bin/dbus-send
+
+  dbus_system_services="
+        org.freedesktop.systemd1
+        org.freedesktop.timedate1
+        org.freedesktop.hostname1
+  "
+  inst_dir      /etc/dbus-1/system.d
+  inst_dir      /usr/share/dbus-1/services
+  inst_dir      /usr/share/dbus-1/system-services
+  inst_multiple /etc/dbus-1/system.conf
+  inst_multiple /usr/share/dbus-1/system.conf \
+                /usr/share/dbus-1/services/org.freedesktop.systemd1.service
+  for service in $dbus_system_services ; do
+      inst_multiple        /etc/dbus-1/system.d/${service}.conf \
+              /usr/share/dbus-1/system-services/${service}.service
+  done
+  inst_multiple $(find /var/lib/dbus)
+
+  inst_hook cleanup 99 "$moddir/dbus-cleanup.sh"
+
+  grep '^messagebus:' /etc/passwd >> "$initdir/etc/passwd"
+  grep '^messagebus:' /etc/group >> "$initdir/etc/group"
+
+  # do not enable -- this is a static service
+  #systemctl --root "$initdir" enable $DBUS_SERVICE > /dev/null 2>&1
+
+  sed -i -e \
+'/^\[Unit\]/aDefaultDependencies=no\
+Conflicts=shutdown.target\
+Before=shutdown.target' \
+    "$initdir"$DBUS_SERVICE
+
+  sed -i -e \
+'/^\[Unit\]/aDefaultDependencies=no\
+Conflicts=shutdown.target\
+Before=shutdown.target
+/^\[Socket\]/aRemoveOnStop=yes' \
+    "$initdir"/usr/lib/systemd/system/dbus.socket
+
+  #We need to make sure that systemd-tmpfiles-setup.service->dbus.socket will not wait local-fs.target to start,
+  #If swap is encrypted, this would make dbus wait the timeout for the swap before loading. This could delay sysinit
+  #services that are dependent on dbus.service.
+  sed -i -Ee \
+    '/^After/s/(After[[:space:]]*=.*)(local-fs.target[[:space:]]*)(.*)/\1-\.mount \3/' \
+    "$initdir"/usr/lib/systemd/system/systemd-tmpfiles-setup.service
+}