{
    $Id$
    This file is part of the Free Pascal run time library.
    Copyright (c) 1999-2000 by the Free Pascal development team

    Disk functions from Delphi's sysutils.pas

    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.

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

{
  The Diskfree and Disksize functions need a file on the specified drive, since this
  is required for the statfs system call.
  These filenames are set in drivestr[0..26], and have been preset to :
   0 - '.'      (default drive - hence current dir is ok.)
   1 - '/fd0/.'  (floppy drive 1 - should be adapted to local system )
   2 - '/fd1/.'  (floppy drive 2 - should be adapted to local system )
   3 - '/'       (C: equivalent of dos is the root partition)
   4..26          (can be set by your own applications)
  ! Use AddDisk() to Add new drives !
  They both return -1 when a failure occurs.
}
Const
  FixDriveStr : array[0..3] of pchar=(
    '.',
    '/fd0/.',
    '/fd1/.',
    '/.'
    );
var
  Drives   : byte;
  DriveStr : array[4..26] of pchar;

Procedure AddDisk(const path:string);
begin
  if not (DriveStr[Drives]=nil) then
   FreeMem(DriveStr[Drives],StrLen(DriveStr[Drives])+1);
  GetMem(DriveStr[Drives],length(Path)+1);
  StrPCopy(DriveStr[Drives],path);
  inc(Drives);
  if Drives>26 then
   Drives:=4;
end;



Function DiskFree(Drive: Byte): Longint;
var
  fs : statfs;
Begin
  if ((Drive<4) and (not (fixdrivestr[Drive]=nil)) and fsstat(StrPas(fixdrivestr[drive]),fs)) or
     ((not (drivestr[Drive]=nil)) and fsstat(StrPas(drivestr[drive]),fs)) then
   Diskfree:=fs.bavail*fs.bsize
  else
   Diskfree:=-1;
End;



Function DiskSize(Drive: Byte): Longint;
var
  fs : statfs;
Begin
  if ((Drive<4) and (not (fixdrivestr[Drive]=nil)) and fsstat(StrPas(fixdrivestr[drive]),fs)) or
     ((not (drivestr[Drive]=nil)) and fsstat(StrPas(drivestr[drive]),fs)) then
   DiskSize:=fs.blocks*fs.bsize
  else
   DiskSize:=-1;
End;


Function GetCurrentDir : String;
begin
  GetDir (0,Result);
end;


Function SetCurrentDir (Const NewDir : String) : Boolean;
begin
  {$I-}
  ChDir(NewDir);
  result := (IOResult = 0);
  {$I+}
end;


Function CreateDir (Const NewDir : String) : Boolean;
begin
  {$I-}
  MkDir(NewDir);
  result := (IOResult = 0);
  {$I+}
end;


Function RemoveDir (Const Dir : String) : Boolean;
begin
  {$I-}
  RmDir(Dir);
  result := (IOResult = 0);
  {$I+}
end;


{
 $Log$
 Revision 1.5  2000-01-07 16:41:40  daniel
   * copyright 2000

 Revision 1.4  1999/04/26 09:34:32  peter
   * fixed diskfree,disksize
   * dir functions now return error status instead of true

 Revision 1.3  1999/04/26 07:40:40  michael
 + Fixed removedir

 Revision 1.2  1999/04/08 11:31:00  peter
   * removed warnings

 Revision 1.1  1998/10/11 13:42:04  michael
 + Added disk and directory functions

}