FileUtil.ModePermission symbolic mode.
type clause = [ | `User of actionlist| `Group of actionlist| `Other of actionlist| `All of actionlist| `None of actionlist ]type t = clause listTypical symbolic mode:
`Group (`Add `Read)`User (`Set (`List [`Read; `Write]));
`Group (`Add (`List [`Read; `Write]));
`Other (`Remove (`List [`Read; `Write; `Exec]))val to_string : t -> stringval apply : is_dir:bool -> umask:int -> Unix.file_perm -> t -> Unix.file_perm