int file_has_acl (char const *, struct stat const *);
int copy_acl (char const *, int, char const *, int, mode_t);
int set_acl (char const *, int, mode_t);
int file_has_acl (char const *, struct stat const *);
int copy_acl (char const *, int, char const *, int, mode_t);
int set_acl (char const *, int, mode_t);