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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [dup2.c] - Blame information for rev 173

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1 30 unneback
/*
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 *  dup2() - POSIX 1003.1b 6.2.1 Duplicate an Open File Descriptor
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: dup2.c,v 1.2 2001-09-27 12:01:15 chris Exp $
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 */
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#include <unistd.h>
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#include <fcntl.h>
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#include "libio_.h"
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int dup2(
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  int fildes,
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  int fildes2
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)
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{
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  int          status;
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  struct stat  buf;
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  /*
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   *  If fildes is not valid, then fildes2 should not be closed.
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   */
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  status = fstat( fildes, &buf );
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  if ( status == -1 )
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    return -1;
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  /*
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   *  If fildes2 is not valid, then we should not do anything either.
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   */
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  status = fstat( fildes2, &buf );
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  if ( status == -1 )
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    return -1;
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  /*
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   *  This fcntl handles everything else.
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   */
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  return fcntl( fildes, F_DUPFD, fildes2 );
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}

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