-extern void init_error_log(const char *prog_name, const char *logfname, int debuglevel);
-extern void log_error(int loglevel, char *fmt, ...);
+extern void init_error_log(const char *prog_name, const char *logfname);
+extern void set_debug_level(int debuglevel);
+extern void disable_logging(void);
+extern void init_log_module(void);
+extern void show_version(const char *prog_name);
+extern void log_error(int loglevel, const char *fmt, ...);
+extern const char *jb_err_to_string(int jb_error);