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171 | --
-- Copyright (C) 2018-2023, AdaCore
--
-- SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
--
-- Call `/bin/stty' to check if TTY support works
with Ada.Command_Line;
with Ada.Text_IO;
with Ada.Streams;
with Ada.Strings.Unbounded;
with Ada.Strings.Fixed;
with Spawn.Processes;
with Spawn.Processes.Monitor_Loop;
with Spawn.String_Vectors;
procedure Spawn_STTY is
pragma Assertion_Policy (Check);
package Listeners is
type Listener is limited new Spawn.Processes.Process_Listener with record
Process : Spawn.Processes.Process;
Stdin : Ada.Strings.Unbounded.Unbounded_String;
Stdout : Ada.Strings.Unbounded.Unbounded_String;
Stderr : Ada.Strings.Unbounded.Unbounded_String;
Started : Boolean := False;
Stopped : Boolean := False;
Error : Integer := 0;
end record;
overriding procedure Standard_Output_Available
(Self : in out Listener);
overriding procedure Standard_Error_Available
(Self : in out Listener);
overriding procedure Started (Self : in out Listener);
overriding procedure Finished
(Self : in out Listener;
Exit_Status : Spawn.Processes.Process_Exit_Status;
Exit_Code : Spawn.Processes.Process_Exit_Code);
overriding procedure Error_Occurred
(Self : in out Listener;
Process_Error : Integer);
end Listeners;
package body Listeners is
overriding procedure Standard_Output_Available
(Self : in out Listener)
is
use type Ada.Streams.Stream_Element_Count;
begin
loop
declare
Data : Ada.Streams.Stream_Element_Array (1 .. 5);
Last : Ada.Streams.Stream_Element_Count;
Success : Boolean := True;
begin
Self.Process.Read_Standard_Output (Data, Last, Success);
exit when Last < Data'First;
for Char of Data (1 .. Last) loop
if Char not in 16#0D# | 16#0A# then
Ada.Strings.Unbounded.Append
(Self.Stdout, Character'Val (Char));
end if;
end loop;
end;
end loop;
end Standard_Output_Available;
overriding procedure Standard_Error_Available
(Self : in out Listener)
is
use type Ada.Streams.Stream_Element_Count;
begin
loop
declare
Data : Ada.Streams.Stream_Element_Array (1 .. 5);
Last : Ada.Streams.Stream_Element_Count;
Success : Boolean := True;
begin
Self.Process.Read_Standard_Error (Data, Last, Success);
exit when Last < Data'First;
for Char of Data (1 .. Last) loop
if Char not in 16#0D# | 16#0A# then
Ada.Strings.Unbounded.Append
(Self.Stderr, Character'Val (Char));
end if;
end loop;
end;
end loop;
end Standard_Error_Available;
overriding procedure Started (Self : in out Listener) is
begin
Self.Started := True;
end Started;
overriding procedure Finished
(Self : in out Listener;
Exit_Status : Spawn.Processes.Process_Exit_Status;
Exit_Code : Spawn.Processes.Process_Exit_Code)
is
use type Spawn.Processes.Process_Exit_Code;
begin
if Exit_Code /= 0 then
Ada.Text_IO.Put_Line ("Unexpected exit code" & (Exit_Code'Img));
Ada.Command_Line.Set_Exit_Status (Ada.Command_Line.Failure);
end if;
Self.Stopped := True;
end Finished;
overriding procedure Error_Occurred
(Self : in out Listener;
Process_Error : Integer)
is
begin
Ada.Text_IO.Put_Line ("Error_Occurred:" & (Process_Error'Img));
Ada.Command_Line.Set_Exit_Status (Ada.Command_Line.Failure);
Self.Error := Process_Error;
Self.Stopped := True;
end Error_Occurred;
end Listeners;
Command : constant String := "/bin/stty";
Args : Spawn.String_Vectors.UTF_8_String_Vector;
L : aliased Listeners.Listener;
P : Spawn.Processes.Process renames L.Process;
begin
Args.Append ("-a");
P.Set_Standard_Input_PTY;
P.Set_Standard_Output_PTY;
P.Set_Standard_Error_PTY;
P.Set_Program (Command);
P.Set_Arguments (Args);
P.Set_Listener (L'Unchecked_Access);
P.Start;
while not L.Stopped loop
Spawn.Processes.Monitor_Loop (0.001);
end loop;
declare
Stdout : constant String := Ada.Strings.Unbounded.To_String (L.Stdout);
Stderr : constant String := Ada.Strings.Unbounded.To_String (L.Stderr);
begin
Ada.Text_IO.Put_Line (Stderr);
Ada.Text_IO.Put_Line (Stdout);
pragma Assert (Ada.Strings.Fixed.Count (Stdout, "speed") = 1);
pragma Assert (Stderr = "");
pragma Assert (L.Started);
pragma Assert (L.Error = 0);
end;
end Spawn_STTY;
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