int read_uid_file(struct uid_range *admissible_uids);
int write_uid_file(void);
void create_hash_table(unsigned bits);
void sort_hash_table(int (*comp)(const void *, const void *));
int read_uid_file(struct uid_range *admissible_uids);
int write_uid_file(void);
void create_hash_table(unsigned bits);
void sort_hash_table(int (*comp)(const void *, const void *));