+/* Non-zero means that shell functions inherit the DEBUG trap. */
+int function_trace_mode = 0;
+
+/* Non-zero means that shell functions inherit the ERR trap. */
+int error_trace_mode = 0;
+
+/* Non-zero means that the rightmost non-zero exit status in a pipeline
+ is the exit status of the entire pipeline. If each processes exits
+ with a 0 status, the status of the pipeline is 0. */
+int pipefail_opt = 0;
+