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53 lines
937 B
C
53 lines
937 B
C
/*
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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.rtems.com/license/LICENSE.
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*
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* $Id$
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*/
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#if HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <unistd.h>
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#include <fcntl.h>
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#include <rtems/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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