Try to quit normally (blc_status=BLC_QUIT) while receiving SIGTREM the first...

Try to quit normally (blc_status=BLC_QUIT) while receiving SIGTREM the first time, the second time, use exit()

src/blc_program.cpp

@@ -408,8 +408,14 @@ void blc_program_args_display_help()
 }
 
 static void on_sigterm(int){
-    fprintf(stderr, "%s: receiving SIGTERM\n", blc_program_id);
-    exit(EXIT_SUCCESS);
+    if (blc_status==BLC_QUIT){
+        fprintf(stderr, "%s: receiving SIGTERM in quiting mode. Force to quit.\n", blc_program_id);
+        exit(EXIT_FAILURE);
+    }
+    else {
+        fprintf(stderr, "%s: receiving SIGTERM\n", blc_program_id);
+        blc_command_ask_quit();
+    }
 }
 
 static void on_sigtstp(int){