daemon: Add a logging function for libblockdev

So we can redirect important messages from libblockdev to our log.

src/udisksdaemon.c

@@ -310,6 +310,34 @@ check_modules_state_in_idle_cb (gpointer user_data)
   return G_SOURCE_REMOVE;
 }
 
+static void
+bd_log_redirect (gint level, const gchar *msg)
+{
+  switch (level)
+    {
+      case BD_UTILS_LOG_EMERG:
+      case BD_UTILS_LOG_ALERT:
+      case BD_UTILS_LOG_CRIT:
+      case BD_UTILS_LOG_ERR:
+        udisks_critical ("[blockdev] %s", msg);
+        break;
+      case BD_UTILS_LOG_WARNING:
+        udisks_warning ("[blockdev] %s", msg);
+        break;
+      case BD_UTILS_LOG_NOTICE:
+        udisks_notice ("[blockdev] %s", msg);
+        break;
+      case BD_UTILS_LOG_INFO:
+        udisks_info ("[blockdev] %s", msg);
+        break;
+      case BD_UTILS_LOG_DEBUG:
+        udisks_debug ("[blockdev] %s", msg);
+        break;
+      default:
+        break;
+    }
+}
+
 static void
 udisks_daemon_constructed (GObject *object)
 {
@@ -342,7 +370,7 @@ udisks_daemon_constructed (GObject *object)
   BDPluginSpec **plugin_p = NULL;
   error = NULL;
 
-  ret = bd_try_init (plugins, NULL, NULL, &error);
+  ret = bd_try_init (plugins, bd_log_redirect, NULL, &error);
   if (!ret)
     {
       if (error)
@@ -360,6 +388,12 @@ udisks_daemon_constructed (GObject *object)
       }
     }
 
+#ifdef DEBUG
+  bd_utils_set_log_level(BD_UTILS_LOG_DEBUG);
+#else
+  bd_utils_set_log_level(BD_UTILS_LOG_INFO);
+#endif
+
   /* Generate global UUID */
   uuid_generate (uuid);
   uuid_unparse (uuid, &uuid_buf[0]);