val at_fdcwd : Base.unit -> Posixat.Fd.tval has_mkfifoat : Base.boolval openat : dir:Posixat.Fd.t -> path:Base.string -> flags:Posixat.Open_flag.t Base.list -> perm:Posixat.File_perm.t -> Unix.file_descrval faccessat : dir:Posixat.Fd.t -> path:Base.string -> mode:Posixat.Access_permission.t Base.list -> flags:Posixat.At_flag.t Base.list -> unitval fchmodat : dir:Posixat.Fd.t -> path:Base.string -> perm:Posixat.File_perm.t -> flags:Posixat.At_flag.t Base.list -> unitval fchownat : dir:Posixat.Fd.t -> path:Base.string -> uid:Base.int -> gid:Base.int -> flags:Posixat.At_flag.t Base.list -> unitval mkdirat : dir:Posixat.Fd.t -> path:Base.string -> perm:Posixat.File_perm.t -> unitval unlinkat : dir:Posixat.Fd.t -> path:Base.string -> flags:Posixat.At_flag.t Base.list -> unitval mkfifoat : dir:Posixat.Fd.t -> path:Base.string -> perm:Posixat.File_perm.t -> unitval linkat : olddir:Posixat.Fd.t -> oldpath:Base.string -> newdir:Posixat.Fd.t -> newpath:Base.string -> flags:Posixat.At_flag.t Base.list -> unitval renameat : olddir:Posixat.Fd.t -> oldpath:Base.string -> newdir:Posixat.Fd.t -> newpath:Base.string -> unitval symlinkat : oldpath:Base.string -> newdir:Posixat.Fd.t -> newpath:Base.string -> unitval fstatat : dir:Posixat.Fd.t -> path:Base.string -> flags:Posixat.At_flag.t Base.list -> Unix.LargeFile.statsval readlinkat : dir:Posixat.Fd.t -> path:Base.string -> stringval fdopendir : Posixat.Fd.t -> Unix.dir_handle