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/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
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 *   Luca Abeni          <luca@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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/*
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 * Copyright (C) 1999 Massimiliano Giorgi
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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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.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/*
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 * CVS :        $Id: dup2.c,v 1.1.1.1 2002-03-29 14:12:53 pj Exp $
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 *
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 * File:        $File$
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 * Revision:    $Revision: 1.1.1.1 $
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 * Last update: $Date: 2002-03-29 14:12:53 $
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 */
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#include <unistd.h>
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#include <fcntl.h>
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#include "errno.h"
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int dup2(int fildes,int fildes2)
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{
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  int res;
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  if (fildes2<0||fildes2>=OPEN_MAX) {
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    __set_errno(EBADF);
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    return -1;
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  }
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  /*
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  if (fildes valid && fildes==fildes2) return fildes;
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  if (fildes not valid) {
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    __set_errno(EBADF);
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    return -1;
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  }
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  */
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  res=close(fildes2);
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  if (res!=0) return res;
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  return fcntl(fildes,F_DUPFD,fildes2);
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}