{
    This file is part of the Free Pascal run time library.
    Copyright (c) 2014 by Free Pascal development team

    Low level directory functions

    See the file COPYING.FPC, included in this distribution,
    for details about the copyright.

    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.

 **********************************************************************}


{*****************************************************************************
                           Directory Handling
*****************************************************************************}
procedure do_mkdir(const s : rawbytestring);
var
  tmpStr : rawbytestring;
  tmpLock: BPTR;
begin
  checkCTRLC;
  tmpStr:=PathConv(s);
  tmpLock:=dosCreateDir(pchar(tmpStr));
  if tmpLock=0 then begin
    dosError2InOut(IoErr);
    exit;
  end;
  UnLock(tmpLock);
end;

procedure do_rmdir(const s : rawbytestring);
var
  tmpStr : rawbytestring;
begin
  checkCTRLC;
  if (s='.') then
    begin
      InOutRes:=16;
      exit;
    end;
  tmpStr:=PathConv(s);
  if not dosDeleteFile(pchar(tmpStr)) then
    dosError2InOut(IoErr);
end;

procedure do_ChDir(const s: rawbytestring);
var
  tmpStr : rawbytestring;
  tmpLock: BPTR;
  FIB    : PFileInfoBlock;
begin
  checkCTRLC;
  tmpStr:=PathConv(s);
  tmpLock:=0;

  { Changing the directory is a pretty complicated affair }
  {   1) Obtain a lock on the directory                   }
  {   2) CurrentDir the lock                              }
  tmpLock:=Lock(pchar(tmpStr),SHARED_LOCK);
  if tmpLock=0 then begin
    dosError2InOut(IoErr);
    exit;
  end;

  FIB:=nil;
  new(FIB);

  if (Examine(tmpLock,FIB)<>0) and (FIB^.fib_DirEntryType>0) then begin
    tmpLock:=CurrentDir(tmpLock);
    if ASYS_OrigDir=0 then begin
      ASYS_OrigDir:=tmpLock;
      tmpLock:=0;
    end;
  end else begin
    dosError2InOut(ERROR_DIR_NOT_FOUND);
  end;

  if tmpLock<>0 then Unlock(tmpLock);
  if assigned(FIB) then dispose(FIB);
end;

procedure do_GetDir (DriveNr: byte; var Dir: RawByteString);
var
  tmpbuf: array[0..255] of char;
  lockDir: BPTR;
begin
  checkCTRLC;
  Dir := '';

  { dos.library's GetCurrentDirName() doesn't work when called from
    Workbench (ie. when the process has no CLI sructure) }
  { it also doesn't seem to work when invoked from make on AROS }
  LockDir := CurrentDir(0);
  NameFromLock(LockDir, tmpBuf, 256);
  CurrentDir(LockDir);
  Dir := tmpBuf;
  SetCodePage(Dir,DefaultSystemCodePage,false);
end;