object
method add_group : Unix.group_entry -> unit
method add_user : Unix.passwd_entry -> unit
method admin_tables : (string * string) list
method del_group : string -> unit
method del_user : string -> unit
method getgrgid : int -> Unix.group_entry
method getgrnam : string -> Unix.group_entry
method getgroups : string -> Plasma_util.StrSet.t
method getpwnam : string -> Unix.passwd_entry
method getpwuid : int -> Unix.passwd_entry
method groups : Unix.group_entry list
method users : Unix.passwd_entry list
end
