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-- Ada Web Server --
-- --
-- Copyright (C) 2007-2014, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library is distributed in the hope that it will be --
-- useful, but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- As a special exception, if other files instantiate generics from this --
-- unit, or you link this unit with other files to produce an executable, --
-- this unit does not by itself cause the resulting executable to be --
-- covered by the GNU General Public License. This exception does not --
-- however invalidate any other reasons why the executable file might be --
-- covered by the GNU Public License. --
------------------------------------------------------------------------------
-- An ready-to-use implementation of the stream API where the stream content
-- is read from a pipe.
with GNAT.OS_Lib;
private with Ada.Strings.Unbounded;
private with GNAT.Expect;
package AWS.Resources.Streams.Pipe is
use GNAT;
type Stream_Type is new Streams.Stream_Type with private;
procedure Open
(Pipe : out Stream_Type;
Command : String;
Args : OS_Lib.Argument_List;
Timeout : Integer := 10_000);
-- Open the pipe and connect it to the given command's output. Args are
-- passed to the command. Timeout is given in milliseconds and corresponds
-- to the time waiting for output data before timeout. This timeout must be
-- adjusted to be compatible to the output activity of the Command process.
overriding function End_Of_File (Resource : Stream_Type) return Boolean;
overriding procedure Read
(Resource : in out Stream_Type;
Buffer : out Stream_Element_Array;
Last : out Stream_Element_Offset);
overriding procedure Close (Resource : in out Stream_Type);
overriding procedure Reset (Resource : in out Stream_Type) is null;
-- Does nothing as not supported on pipe streams
overriding procedure Set_Index
(Resource : in out Stream_Type;
To : Stream_Element_Offset) is null;
-- Does nothing as not supported on pipe streams
private
use Ada.Strings.Unbounded;
type Stream_Type is new Streams.Stream_Type with record
Pid : Expect.Process_Descriptor;
Timeout : Integer;
EOF : Boolean;
Buffer : Unbounded_String;
end record;
end AWS.Resources.Streams.Pipe;
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