retrieve command result

[evangeli <evangeli@cnam.fr>]

hi all

is it possible to retrieve the result of a command in a variable.
i explain myself:

------------------------------------------------------------------
with GNAT.OS_Lib;
with Ada.Strings.Unbounded;
procedure Test is
	...
	my_string : Ada.Strings.Unbounded.unbounded_string;
	...
begin
	...
	GNAT.OS_Lib.Spawn("ls", ...);
	-- I WOULD LIKE TO GET IN my_string THE RESULT OF THE ls COMMAND
	...
end;
------------------------------------------------------------------

i am under linux with gnat 3.13p.

thanks for any help