Oracle Linux implements at-suffixed system interfaces as
individual system calls, for example:
faccessat()fchmodat()fchownat()fstatat64()futimensat()linkat()mkdirat()mknodat()name_to_handle_at()newfstatat()open_by_handle_at()openat()readlinkat()renameat()symlinkat()unlinkat()utimensat()
These system calls implement a superset of the functionality of their old
non-at-suffixed counterparts. They take an additional first argument
that is either an open directory file descriptor, in which case the operation on a
relative pathname is taken relative to the specified directory, or is the reserved value
AT_FDCWD, in which case the operation takes place relative to the
current working directory.