int path_getcrtime(const char *p, usec_t *usec);
int fd_getcrtime_at(int dirfd, const char *name, usec_t *usec, int flags);
-int same_fd(int a, int b);
-
int chattr_fd(int fd, bool b, unsigned mask);
int chattr_path(const char *p, bool b, unsigned mask);
int change_attr_fd(int fd, unsigned value, unsigned mask);