-void debug_init(char *ident);
-void debug_set_level(uint8_t level);
-void debug_timestamp_on();
-uint8_t debug_get_level();
-void debug(uint8_t level, char *format, ...);
-void debugx(int status, uint8_t level, char *format, ...);
-void debugerrno(int err, uint8_t level, char *format, ...);
-void debugerrnox(int err, uint8_t level, char *format, ...);
-int debug_set_destination(char *dest);
-void debug_reopen_log();