char **trackdb_stats(int *nstatsp);
/* return a list of database stats */
+void trackdb_stats_subprocess(struct ev_source *ev,
+ void (*done)(char *data, void *u),
+ void *u);
+/* collect stats in background and call done() with results */
+
int trackdb_set(const char *track,
const char *name,
const char *value);