+ added unit System.Terminal.Pseudoterminal.Unix

packages/fcl-fpterm/fpmake.pp

@@ -29,6 +29,9 @@ Const
   KVMAny       = KbdOSes+VideoOSes+MouseOSes;
   PtcKvmOSes   = [linux,win32,win64,go32v2,macosx,openbsd,freebsd];
 
+  // OSes that have unix98pty and termio units
+  UnixPtyOSes  = [linux];
+
 Var
   P : TPackage;
   T : TTarget;
@@ -158,6 +161,8 @@ begin
         AddUnit('system.terminal.keyboardinput.keyboard');
         AddUnit('system.terminal.pointingdeviceinput.mouse');
       end;
+
+    T:=P.Targets.AddUnit('system.terminal.pseudoterminal.unix.pas', UnixPtyOSes);
   end;
 end;
 

packages/fcl-fpterm/src/system.terminal.pseudoterminal.unix.pas

@@ -0,0 +1,142 @@
+{ This file is part of fpterm - a terminal emulator, written in Free Pascal
+
+  Copyright (C) 2021, 2022, 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.PseudoTerminal.Unix;
+
+{$mode objfpc}{$H+}
+
+interface
+
+uses
+{$IFDEF FPC_DOTTEDUNITS}
+  System.CTypes, UnixApi.Base;
+{$ELSE FPC_DOTTEDUNITS}
+  ctypes, BaseUnix;
+{$ENDIF FPC_DOTTEDUNITS}
+
+type
+
+  { TUnixPseudoTerminal }
+
+  TUnixPseudoTerminal = class
+  private
+    FChildPid: TPid;
+    FFdSlave, FFdMaster: cint;
+  public
+    constructor Create(const progname: string; argv, envp: PPChar; Width, Height: Integer);
+    procedure Resize(NewWidth, NewHeight: Integer);
+
+    property FdMaster: cint read FFdMaster;
+    property ChildPid: TPid read FChildPid;
+  end;
+
+implementation
+
+uses
+{$IFDEF FPC_DOTTEDUNITS}
+  UnixApi.Unix98.PTY, UnixApi.TermIO;
+{$ELSE FPC_DOTTEDUNITS}
+  unix98pty, termio;
+{$ENDIF FPC_DOTTEDUNITS}
+
+{ TUnixPseudoTerminal }
+
+constructor TUnixPseudoTerminal.Create(const progname: string; argv,
+  envp: PPChar; Width, Height: Integer);
+var
+  ws: TWinSize;
+begin
+  FFdMaster:=fpposix_openpt(O_RDWR);
+  if FFdMaster < 0 then
+  begin
+    Writeln(ErrOutput, 'Error creating a pseudo terminal');
+    Halt(1);
+  end;
+
+  if fpgrantpt(FFdMaster) <> 0 then
+  begin
+    Writeln(ErrOutput, 'Error creating a pseudo terminal');
+    Halt(1);
+  end;
+
+  if fpunlockpt(FFdMaster) <> 0 then
+  begin
+    Writeln(ErrOutput, 'Error creating a pseudo terminal');
+    Halt(1);
+  end;
+
+  FFdSlave := FpOpen(fpptsname(FFdMaster), O_RDWR);
+  if FFdSlave < 0 then
+  begin
+    Writeln(ErrOutput, 'Error creating a pseudo terminal');
+    Halt(1);
+  end;
+
+  FillChar(ws, SizeOf(ws), 0);
+  ws.ws_col := Width;
+  ws.ws_row := Height;
+  FpIOCtl(FFdMaster, TIOCSWINSZ, @ws);
+
+  FChildPid:=FpFork;
+  if FChildPid = 0 then
+  begin
+    { child }
+    FpClose(FFdMaster);
+
+    FpClose(0);
+    FpClose(1);
+    FpClose(2);
+
+    FpDup(FFdSlave);
+    FpDup(FFdSlave);
+    FpDup(FFdSlave);
+
+    FpSetsid;
+    FpIOCtl(0, TIOCSCTTY, Pointer(0));
+
+    FpExecve(progname, argv, envp);
+    Halt(1);
+  end;
+
+  FpClose(FFdSlave);
+end;
+
+procedure TUnixPseudoTerminal.Resize(NewWidth, NewHeight: Integer);
+var
+  ws: TWinSize;
+begin
+  FillChar(ws, SizeOf(ws), 0);
+  ws.ws_col := NewWidth;
+  ws.ws_row := NewHeight;
+  FpIOCtl(FFdMaster, TIOCSWINSZ, @ws);
+end;
+
+end.
+