+struct command_function *
+command_string_to_function(struct command_function *functions, char *name);
+
+enum command_result
+command_function_help(struct command_function *functions, int argc, char **argv);
+
+void
+command_syntax_error(int argc, char **argv);
+
+enum command_result
+command_quit (int argc, char **argv);
+
+enum command_result
+command_help (int argc, char **argv);
+