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{
$Id: sysutils.pp,v 1.59 2005/03/25 22:53:39 jonas Exp $
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by Florian Klaempfl
member of the Free Pascal development team
Sysutils unit for linux
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.
**********************************************************************}
{$IF DEFINED(FREEBSD) AND NOT DEFINED(FREEBSD4)}
{$IFDEF FPC_USE_LIBC}
function cuuidgen(p:PGUID;x:cint):cint; external clib name 'uuidgen';
{$ELSE}
function cuuidgen(p:pguid;x:cint):cint;
begin
result:=do_syscall(syscall_nr_uuidgen,tsysparam(p),tsysparam(x));
end;
{$ENDIF}
Function SysCreateGUID(out GUID : TGUID) : Integer;
begin
result:=0;
if cuuidgen(@guid,1)=-1 then
GetRandomBytes(GUID,SizeOf(Guid));
end;
{$ELSE}
Const
RandomDevice = '/dev/urandom';
Function GetURandomBytes(Var Buf; NBytes : Integer) : Boolean;
Var
fd,I : Integer;
P : PByte;
begin
P:=@Buf;
fd:=FileOpen(RandomDevice,fmOpenRead);
Result:=(fd>=0);
if Result then
Try
While (NBytes>0) do
begin
I:=FileRead(fd,P^,nbytes);
If I>0 then
begin
Inc(P,I);
Dec(NBytes,I);
end;
end;
Finally
FileClose(Fd);
end;
end;
Function SysCreateGUID(out GUID : TGUID) : Integer;
begin
if not GetUrandomBytes(Guid,SizeOf(GUID)) then
GetRandomBytes(GUID,SizeOf(Guid));
Result:=0;
end;
{$ENDIF}
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