#define DBFILE ".sbs"      /* The database file in each directory */

long db_find(char *);        /* Find a name in a database file in the cwd */
void db_add(char *);         /* Add a name to the database file in the cwd */
void db_remove(char *);      /* Remove a name from the database in the cwd */
int db_exists(char *dirname); /* Test if DBFILE exists in dirname */