val readList : string -> string list
val writeList : string * string list -> unit
(* Reading and writing lists of strings stored on separate lines in files *)
+
+ val lineInFile : string -> string -> bool
+ (* Is there a line in the file (first arg) that matches that given? *)
+
+ val inGroup : {user : string, group : string} -> bool
+ (* Check membership in a UNIX group. *)
+
+ val mkDirAll : string -> unit
+ (* [mkDirAll p] creates directory "p", creating all parent directories, as
+ * necessary. *)
+
+ val remove : ''a list * ''a -> ''a list
+ val removeDups : ''a list -> ''a list
+
+ val copyDirCreate : { from : string, to : string } -> unit
+ val moveDirCreate : { from : string, to : string } -> unit
end