static void log_scratched(void *v, const char *track, const char *user);
static void log_state(void *v, unsigned long state);
static void log_volume(void *v, int l, int r);
static void log_scratched(void *v, const char *track, const char *user);
static void log_state(void *v, unsigned long state);
static void log_volume(void *v, int l, int r);