-/**
- * gras_os_time:
- * @Returns: number of second since the Epoch.
- * (00:00:00 UTC, January 1, 1970 in Real Life, and begining of simulation in SG)
- *
- * Get the current time.
+/** @addtogroup GRAS_virtu
+ * @brief System call abstraction layer.
+ *
+ *
+ * @{
+ */
+
+/** @brief Get the current time
+ * @return number of second since the Epoch.
+ * (00:00:00 UTC, January 1, 1970 in Real Life, and begining of simulation in SG)