Add start_time to get_info methods and show uptime

src/cryptonote_core/cryptonote_core.cpp

@@ -250,6 +250,8 @@ namespace cryptonote
   //-----------------------------------------------------------------------------------------------
   bool core::init(const boost::program_options::variables_map& vm, const cryptonote::test_options *test_options)
   {
+    start_time = std::time(nullptr);
+
     m_fakechain = test_options != NULL;
     bool r = handle_command_line(vm);
 
@@ -1010,6 +1012,11 @@ namespace cryptonote
     return m_target_blockchain_height;
   }
   //-----------------------------------------------------------------------------------------------
+  std::time_t core::get_start_time() const
+  {
+    return start_time;
+  }
+  //-----------------------------------------------------------------------------------------------
   void core::graceful_exit()
   {
     raise(SIGTERM);

src/cryptonote_core/cryptonote_core.h

@@ -559,6 +559,12 @@ namespace cryptonote
       */
      uint64_t get_target_blockchain_height() const;
 
+     /**
+      * @brief gets start_time
+      *
+      */
+     std::time_t get_start_time() const;
+
      /**
       * @brief tells the Blockchain to update its checkpoints
       *
@@ -813,6 +819,8 @@ namespace cryptonote
      boost::interprocess::file_lock db_lock; //!< a lock object for a file lock in the db directory
 
      size_t block_sync_size;
+
+     time_t start_time;
    };
 }