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