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650 lines
16 KiB
ObjectPascal
650 lines
16 KiB
ObjectPascal
{
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$Id$
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This file is part of the Free Pascal Integrated Development Environment
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Copyright (c) 1998 by Berczi Gabor
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Unit to redirect output and error to files
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Adapted from code donated to public domain by Schwartz Gabriel. 20/03/1993.
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See the file COPYING.FPC, included in this distribution,
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for details about the copyright.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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**********************************************************************}
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Unit FPRedir;
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Interface
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{$R-}
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{$ifndef linux}
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{$S-}
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{$endif}
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{$ifdef TP}
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{$define implemented}
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{$endif TP}
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{$ifdef Go32v2}
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{$define implemented}
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{$endif}
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{$ifdef linux}
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{$define implemented}
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{$endif}
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{ be sure msdos is not set for FPC compiler }
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{$ifdef FPC}
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{$UnDef MsDos}
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{$endif FPC}
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Var
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IOStatus : Integer;
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RedirErrorOut,RedirErrorIn,
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RedirErrorError : Integer;
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ExecuteResult : Word;
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{------------------------------------------------------------------------------}
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procedure InitRedir;
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function ExecuteRedir (Const ProgName, ComLine, RedirStdIn, RedirStdOut, RedirStdErr : String) : boolean;
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function ChangeRedirOut(Const Redir : String; AppendToFile : Boolean) : Boolean;
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procedure RestoreRedirOut;
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procedure DisableRedirOut;
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procedure EnableRedirOut;
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function ChangeRedirIn(Const Redir : String) : Boolean;
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procedure RestoreRedirIn;
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procedure DisableRedirIn;
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procedure EnableRedirIn;
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function ChangeRedirError(Const Redir : String; AppendToFile : Boolean) : Boolean;
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procedure RestoreRedirError;
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procedure DisableRedirError;
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procedure EnableRedirError;
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procedure RedirDisableAll;
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procedure RedirEnableAll;
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Implementation
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Uses
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{$ifdef go32v2}
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go32,
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{$endif go32v2}
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{$ifdef linux}
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linux,
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{$endif linux}
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dos;
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{*****************************************************************************
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Dos
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*****************************************************************************}
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{$ifdef implemented}
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{$ifdef TP}
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const
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UnusedHandle = -1;
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StdInputHandle = 0;
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StdOutputHandle = 1;
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StdErrorHandle = 2;
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Type
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PtrRec = packed record
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Ofs, Seg : Word;
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end;
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PHandles = ^THandles;
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THandles = Array [Byte] of Byte;
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PWord = ^Word;
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Var
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MinBlockSize : Word;
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MyBlockSize : Word;
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Handles : PHandles;
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PrefSeg : Word;
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OldHandleOut,OldHandleIn,OldHandleError : Byte;
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{$endif TP}
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var
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FIN,FOUT,FERR : ^File;
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RedirChangedOut,
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RedirChangedIn : Boolean;
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RedirChangedError : Boolean;
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InRedirDisabled,OutRedirDisabled,ErrorRedirDisabled : Boolean;
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TempHOut, TempHIn,TempHError : longint;
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{ For linux the following functions exist
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Function Dup(oldfile:longint;var newfile:longint):Boolean;
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Function Dup2(oldfile,newfile:longint):Boolean;
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Function fdClose(fd:longint):boolean;
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}
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{$ifdef go32v2}
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function dup(fh : longint;var nh : longint) : boolean;
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var
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Regs : Registers;
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begin
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Regs.ah:=$45;
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Regs.bx:=fh;
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MsDos (Regs);
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Dup:=true;
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If (Regs.Flags and fCarry)=0 then
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nh:=Regs.Ax
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else
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Dup:=false;
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end;
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function dup2(fh,nh : longint) : boolean;
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var
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Regs : Registers;
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begin
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Dup2:=true;
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If fh=nh then
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exit;
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Regs.ah:=$46;
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Regs.bx:=fh;
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Regs.cx:=nh;
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MsDos (Regs);
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If (Regs.Flags and fCarry)<>0 then
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Dup2:=false;
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end;
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Function FdClose (Handle : Longint) : boolean;
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var Regs: registers;
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begin
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Regs.Eax := $3e00;
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Regs.Ebx := Handle;
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MsDos(Regs);
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FdClose:=(Regs.Flags and fCarry)=0;
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end;
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{$endif def go32v2}
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{$ifdef TP}
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Function FdClose (Handle : Longint) : boolean;
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begin
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{ if executed as under GO32 this hangs the DOS-prompt }
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FdClose:=true;
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end;
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{$endif}
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{$I-}
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function FileExist(const FileName : PathStr) : Boolean;
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var
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f : file;
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Attr : word;
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begin
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Assign(f, FileName);
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GetFAttr(f, Attr);
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FileExist := DosError = 0;
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end;
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{............................................................................}
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function ChangeRedirOut(Const Redir : String; AppendToFile : Boolean) : Boolean;
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begin
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ChangeRedirOut:=False;
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If Redir = '' then Exit;
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Assign (FOUT^, Redir);
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If AppendToFile and FileExist(Redir) then
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Begin
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Reset(FOUT^,1);
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Seek(FOUT^,FileSize(FOUT^));
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End else Rewrite (FOUT^);
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RedirErrorOut:=IOResult;
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IOStatus:=RedirErrorOut;
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If IOStatus <> 0 then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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OldHandleOut:=Handles^[StdOutputHandle];
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Handles^[StdOutputHandle]:=Handles^[FileRec (FOUT^).Handle];
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ChangeRedirOut:=True;
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OutRedirDisabled:=False;
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{$else}
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if dup(StdOutputHandle,TempHOut) and
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dup2(FileRec(FOUT^).Handle,StdOutputHandle) then
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begin
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ChangeRedirOut:=True;
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OutRedirDisabled:=False;
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end;
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{$endif def FPC}
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RedirChangedOut:=True;
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end;
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function ChangeRedirIn(Const Redir : String) : Boolean;
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begin
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ChangeRedirIn:=False;
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If Redir = '' then Exit;
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Assign (FIN^, Redir);
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Reset(FIN^,1);
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RedirErrorIn:=IOResult;
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IOStatus:=RedirErrorIn;
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If IOStatus <> 0 then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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OldHandleIn:=Handles^[StdInputHandle];
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Handles^[StdInputHandle]:=Handles^[FileRec (FIN^).Handle];
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ChangeRedirIn:=True;
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InRedirDisabled:=False;
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{$else}
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if dup(StdInputHandle,TempHIn) and
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dup2(FileRec(FIN^).Handle,StdInputHandle) then
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begin
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ChangeRedirIn:=True;
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InRedirDisabled:=False;
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end;
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{$endif def FPC}
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RedirChangedIn:=True;
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end;
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function ChangeRedirError(Const Redir : String; AppendToFile : Boolean) : Boolean;
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begin
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ChangeRedirError:=False;
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If Redir = '' then Exit;
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Assign (FERR^, Redir);
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If AppendToFile and FileExist(Redir) then
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Begin
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Reset(FERR^,1);
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Seek(FERR^,FileSize(FERR^));
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End else Rewrite (FERR^);
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RedirErrorError:=IOResult;
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IOStatus:=RedirErrorError;
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If IOStatus <> 0 then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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OldHandleError:=Handles^[StdErrorHandle];
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Handles^[StdErrorHandle]:=Handles^[FileRec (FERR^).Handle];
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ChangeRedirError:=True;
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ErrorRedirDisabled:=False;
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{$else}
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if dup(StdErrorHandle,TempHError) and
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dup2(FileRec(FERR^).Handle,StdErrorHandle) then
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begin
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ChangeRedirError:=True;
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ErrorRedirDisabled:=False;
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end;
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{$endif}
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RedirChangedError:=True;
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end;
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{$IfDef MsDos}
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{Set HeapEnd Pointer to Current Used Heapsize}
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Procedure SmallHeap;assembler;
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asm
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mov bx,word ptr HeapPtr
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shr bx,4
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inc bx
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add bx,word ptr HeapPtr+2
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mov ax,PrefixSeg
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sub bx,ax
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mov es,ax
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mov ah,4ah
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int 21h
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end;
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{Set HeapEnd Pointer to Full Heapsize}
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Procedure FullHeap;assembler;
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asm
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mov bx,word ptr HeapEnd
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shr bx,4
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inc bx
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add bx,word ptr HeapEnd+2
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mov ax,PrefixSeg
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sub bx,ax
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mov es,ax
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mov ah,4ah
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int 21h
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end;
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{$EndIf MsDos}
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procedure RestoreRedirOut;
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begin
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If not RedirChangedOut then Exit;
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{$ifndef FPC}
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Handles^[StdOutputHandle]:=OldHandleOut;
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OldHandleOut:=StdOutputHandle;
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{$else}
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dup2(TempHOut,StdOutputHandle);
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{$endif}
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Close (FOUT^);
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fdClose(TempHOut);
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RedirChangedOut:=false;
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end;
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{............................................................................}
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procedure RestoreRedirIn;
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begin
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If not RedirChangedIn then Exit;
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{$ifndef FPC}
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Handles^[StdInputHandle]:=OldHandleIn;
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OldHandleIn:=StdInputHandle;
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{$else}
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dup2(TempHIn,StdInputHandle);
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{$endif}
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Close (FIn^);
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fdClose(TempHIn);
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RedirChangedIn:=false;
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end;
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{............................................................................}
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procedure DisableRedirIn;
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begin
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If not RedirChangedIn then Exit;
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If InRedirDisabled then Exit;
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{$ifndef FPC}
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Handles^[StdInputHandle]:=OldHandleIn;
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{$else}
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dup2(TempHIn,StdInputHandle);
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{$endif}
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InRedirDisabled:=True;
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end;
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{............................................................................}
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procedure EnableRedirIn;
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begin
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If not RedirChangedIn then Exit;
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If not InRedirDisabled then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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Handles^[StdInputHandle]:=Handles^[FileRec (FIn^).Handle];
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{$else}
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dup2(FileRec(FIn^).Handle,StdInputHandle);
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{$endif}
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InRedirDisabled:=False;
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end;
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{............................................................................}
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procedure DisableRedirOut;
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begin
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If not RedirChangedOut then Exit;
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If OutRedirDisabled then Exit;
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{$ifndef FPC}
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Handles^[StdOutputHandle]:=OldHandleOut;
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{$else}
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dup2(TempHOut,StdOutputHandle);
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{$endif}
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OutRedirDisabled:=True;
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end;
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{............................................................................}
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procedure EnableRedirOut;
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begin
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If not RedirChangedOut then Exit;
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If not OutRedirDisabled then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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Handles^[StdOutputHandle]:=Handles^[FileRec (FOut^).Handle];
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{$else}
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dup2(FileRec(FOut^).Handle,StdOutputHandle);
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{$endif}
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OutRedirDisabled:=False;
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end;
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{............................................................................}
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procedure RestoreRedirError;
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begin
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If not RedirChangedError then Exit;
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{$ifndef FPC}
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Handles^[StdErrorHandle]:=OldHandleError;
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OldHandleError:=StdErrorHandle;
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{$else}
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dup2(TempHError,StdErrorHandle);
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{$endif}
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Close (FERR^);
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fdClose(TempHError);
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RedirChangedError:=false;
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end;
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{............................................................................}
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procedure DisableRedirError;
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begin
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If not RedirChangedError then Exit;
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If ErrorRedirDisabled then Exit;
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{$ifndef FPC}
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Handles^[StdErrorHandle]:=OldHandleError;
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{$else}
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dup2(TempHError,StdErrorHandle);
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{$endif}
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ErrorRedirDisabled:=True;
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end;
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{............................................................................}
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procedure EnableRedirError;
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begin
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If not RedirChangedError then Exit;
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If not ErrorRedirDisabled then Exit;
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{$ifndef FPC}
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Handles:=Ptr (prefseg, PWord (Ptr (prefseg, $34))^);
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Handles^[StdErrorHandle]:=Handles^[FileRec (FErr^).Handle];
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{$else}
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dup2(FileRec(FERR^).Handle,StdErrorHandle);
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{$endif}
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ErrorRedirDisabled:=False;
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end;
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{............................................................................}
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procedure DosExecute(ProgName, ComLine : String);
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Begin
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{$IfDef MsDos}
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SmallHeap;
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{$EndIf MsDos}
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SwapVectors;
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{ Must use shell() for linux for the wildcard expansion (PFV) }
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{$ifdef linux}
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Shell(Progname+' '+Comline);
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{$else}
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Dos.Exec (ProgName, ComLine);
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{$endif}
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IOStatus:=DosError;
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ExecuteResult:=DosExitCode;
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SwapVectors;
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{$IfDef MsDos}
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Fullheap;
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{$EndIf MsDos}
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End;
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{............................................................................}
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function ExecuteRedir (Const ProgName, ComLine, RedirStdIn, RedirStdOut, RedirStdErr : String) : boolean;
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Begin
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RedirErrorOut:=0; RedirErrorIn:=0; RedirErrorError:=0;
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ExecuteResult:=0;
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IOStatus:=0;
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if RedirStdIn<>'' then
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ChangeRedirIn(RedirStdIn);
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if RedirStdOut<>'' then
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ChangeRedirOut(RedirStdOut,false);
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if RedirStdErr<>'stderr' then
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ChangeRedirError(RedirStdErr,false);
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DosExecute(ProgName,ComLine);
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RestoreRedirOut;
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RestoreRedirIn;
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RestoreRedirError;
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ExecuteRedir:=(IOStatus=0) and (RedirErrorOut=0) and
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(RedirErrorIn=0) and (RedirErrorError=0) and
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(ExecuteResult=0);
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End;
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{............................................................................}
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procedure RedirDisableAll;
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begin
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If RedirChangedIn and InRedirDisabled then
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DisableRedirIn;
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If RedirChangedOut and OutRedirDisabled then
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DisableRedirOut;
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If RedirChangedError and not ErrorRedirDisabled then
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DisableRedirError;
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end;
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{............................................................................}
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procedure RedirEnableAll;
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begin
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If RedirChangedIn and InRedirDisabled then
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EnableRedirIn;
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If RedirChangedOut and OutRedirDisabled then
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EnableRedirOut;
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If RedirChangedError and ErrorRedirDisabled then
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EnableRedirError;
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end;
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procedure InitRedir;
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begin
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{$ifndef FPC}
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PrefSeg:=PrefixSeg;
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{$endif FPC}
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end;
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{$else not implemented}
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{*****************************************************************************
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Linux
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*****************************************************************************}
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function ExecuteRedir (Const ProgName, ComLine, RedirStdOut, RedirStdErr : String) : boolean;
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begin
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ExecuteRedir:=false;
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end;
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function ChangeRedir(Const Redir : String; AppendToFile : Boolean) : Boolean;
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begin
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ChangeRedir:=false;
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end;
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procedure RestoreRedir;
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begin
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end;
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function ChangeErrorRedir(Const Redir : String; AppendToFile : Boolean) : Boolean;
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begin
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ChangeErrorRedir:=false;
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end;
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procedure RestoreErrorRedir;
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begin
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end;
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procedure InitRedir;
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begin
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end;
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{$endif not implemented}
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{*****************************************************************************
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Initialize
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*****************************************************************************}
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var oldexit : pointer;
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procedure RedirExit;
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begin
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exitproc:=oldexit;
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Dispose(FIn); Dispose(FOut); Dispose(FErr);
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end;
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Begin
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oldexit:=exitproc;
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exitproc:=@RedirExit;
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New(FIn); New(FOut); New(FErr);
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End.
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{
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$Log$
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Revision 1.17 1999-05-01 23:45:07 pierre
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* FIn FOut FErr dispsoed at exit
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Revision 1.16 1999/04/29 22:57:09 pierre
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+ added code for temporary disabling of redirection
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Revision 1.15 1999/04/07 21:55:52 peter
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+ object support for browser
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* html help fixes
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* more desktop saving things
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* NODEBUG directive to exclude debugger
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Revision 1.14 1999/03/20 00:04:49 pierre
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* handle loss fixed
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Revision 1.13 1999/03/09 01:34:35 peter
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* linux unit
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Revision 1.12 1999/03/08 14:58:10 peter
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+ prompt with dialogs for tools
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Revision 1.11 1999/03/01 15:42:01 peter
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+ Added dummy entries for functions not yet implemented
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* MenuBar didn't update itself automatically on command-set changes
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* Fixed Debugging/Profiling options dialog
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* TCodeEditor converts spaces to tabs at save only if efUseTabChars is set
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* efBackSpaceUnindents works correctly
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+ 'Messages' window implemented
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+ Added '$CAP MSG()' and '$CAP EDIT' to available tool-macros
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+ Added TP message-filter support (for ex. you can call GREP thru
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GREP2MSG and view the result in the messages window - just like in TP)
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* A 'var' was missing from the param-list of THelpFacility.TopicSearch,
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so topic search didn't work...
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* In FPHELP.PAS there were still context-variables defined as word instead
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of THelpCtx
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* StdStatusKeys() was missing from the statusdef for help windows
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+ Topic-title for index-table can be specified when adding a HTML-files
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Revision 1.10 1999/02/22 12:46:58 peter
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* small fixes for linux and grep
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Revision 1.9 1999/02/22 11:12:33 pierre
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* dup and dup2 work for go32v2
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+ also should work for linux (after linux.pp patch)
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Revision 1.8 1999/02/22 02:15:18 peter
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+ default extension for save in the editor
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+ Separate Text to Find for the grep dialog
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* fixed redir crash with tp7
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Revision 1.7 1999/02/20 15:18:32 peter
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+ ctrl-c capture with confirm dialog
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+ ascii table in the tools menu
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+ heapviewer
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* empty file fixed
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* fixed callback routines in fpdebug to have far for tp7
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Revision 1.6 1999/02/05 13:51:43 peter
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* unit name of FPSwitches -> FPSwitch which is easier to use
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* some fixes for tp7 compiling
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}
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