+ added unit System.Terminal.InputOutputConnection.UnixPTY

packages/fcl-fpterm/fpmake.pp

@@ -163,6 +163,13 @@ begin
       end;
 
     T:=P.Targets.AddUnit('system.terminal.pseudoterminal.unix.pas', UnixPtyOSes);
+
+    T:=P.Targets.AddUnit('system.terminal.inputoutputconnection.unixpty.pas', UnixPtyOSes);
+    with T.Dependencies do
+      begin
+        AddUnit('system.terminal.inputoutputconnection');
+        AddUnit('system.terminal.pseudoterminal.unix');
+      end;
   end;
 end;
 

packages/fcl-fpterm/src/system.terminal.inputoutputconnection.unixpty.pas

@@ -0,0 +1,132 @@
+{ This file is part of fpterm - a terminal emulator, written in Free Pascal
+
+  This unit implements an Unix-like pseudoterminal as a connection for the
+  terminal.
+
+  Copyright (C) 2024 Nikolay Nikolov <[email protected]>
+
+  This library is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Library General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or (at your
+  option) any later version with the following modification:
+
+  As a special exception, the copyright holders of this library give you
+  permission to link this library with independent modules to produce an
+  executable, regardless of the license terms of these independent modules,and
+  to copy and distribute the resulting executable under terms of your choice,
+  provided that you also meet, for each linked independent module, the terms
+  and conditions of the license of that module. An independent module is a
+  module which is not derived from or based on this library. If you modify
+  this library, you may extend this exception to your version of the library,
+  but you are not obligated to do so. If you do not wish to do so, delete this
+  exception statement from your version.
+
+  This program 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. See the GNU Library General Public License
+  for more details.
+
+  You should have received a copy of the GNU Library General Public License
+  along with this library; if not, write to the Free Software Foundation,
+  Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA.
+}
+
+unit System.Terminal.InputOutputConnection.UnixPty;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+  System.Terminal.InputOutputConnection, System.Terminal.Pseudoterminal.Unix;
+
+type
+
+  { TTerminalInputOutputConnection_UnixPty }
+
+  TTerminalInputOutputConnection_UnixPty = class(TInterfacedObject, ITerminalInputOutputConnection)
+  private
+    FUnixPseudoTerminal: TUnixPseudoTerminal;
+  protected
+    function IsDataAvailable: Boolean;
+    function IsClosed: Boolean;
+  public
+    constructor Create(const progname: string; argv, envp: PPChar; Width, Height: Integer);
+    destructor Destroy; override;
+
+    function Read(var Buffer; Bytes: SizeUInt): SizeInt;
+    procedure Write(const Buffer; Bytes: SizeUInt);
+    procedure Resize(NewWidth, NewHeight: Integer);
+  end;
+
+implementation
+
+uses
+{$IFDEF FPC_DOTTEDUNITS}
+  System.SysUtils, UnixApi.Base;
+{$ELSE FPC_DOTTEDUNITS}
+  SysUtils, BaseUnix;
+{$ENDIF FPC_DOTTEDUNITS}
+
+{ TTerminalInputOutputConnection_UnixPty }
+
+function TTerminalInputOutputConnection_UnixPty.IsDataAvailable: Boolean;
+var
+  pfd: tpollfd;
+begin
+  pfd.fd := FUnixPseudoTerminal.FdMaster;
+  pfd.events := POLLIN;
+  Result := FpPoll(@pfd, 1, 0) > 0;
+end;
+
+function TTerminalInputOutputConnection_UnixPty.IsClosed: Boolean;
+var
+  wstatus: cInt;
+  wpid: TPid;
+begin
+  Result := False;
+  wpid := FpWaitPid(FUnixPseudoTerminal.ChildPid, wstatus, WNOHANG);
+  if wpid = FUnixPseudoTerminal.ChildPid then
+  begin
+    if wifexited(wstatus) then
+      Result := True;
+  end;
+end;
+
+constructor TTerminalInputOutputConnection_UnixPty.Create(
+  const progname: string; argv, envp: PPChar; Width, Height: Integer);
+begin
+  FUnixPseudoTerminal := TUnixPseudoTerminal.Create(progname, argv, envp, Width, Height);
+end;
+
+destructor TTerminalInputOutputConnection_UnixPty.Destroy;
+begin
+  FreeAndNil(FUnixPseudoTerminal);
+  inherited Destroy;
+end;
+
+function TTerminalInputOutputConnection_UnixPty.Read(var Buffer; Bytes: SizeUInt): SizeInt;
+begin
+  Result := FpRead(FUnixPseudoTerminal.FdMaster, Buffer, Bytes);
+end;
+
+procedure TTerminalInputOutputConnection_UnixPty.Write(const Buffer; Bytes: SizeUInt);
+var
+  W: TsSize;
+  J: LongInt;
+begin
+  if Bytes <= 0 then
+    exit;
+  repeat
+    W := FpWrite(FUnixPseudoTerminal.FdMaster, Buffer, Bytes);
+    J := FpGetErrno;
+  until (W <> -1) or ((J <> ESysEINTR) and (J <> ESysEAgain));
+end;
+
+procedure TTerminalInputOutputConnection_UnixPty.Resize(NewWidth, NewHeight: Integer);
+begin
+  FUnixPseudoTerminal.Resize(NewWidth, NewHeight);
+end;
+
+end.
+