4.115
Last change
on this file since e02d5dd9 was
c499856,
checked in by Chris Johns <chrisj@…>, on 03/20/14 at 21:10:47
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Change all references of rtems.com to rtems.org.
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Property mode set to
100644
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File size:
1014 bytes
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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Duplicate an Open File Descriptor |
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5 | * @ingroup libcsupport |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-1999. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <unistd.h> |
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22 | #include <fcntl.h> |
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23 | |
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24 | #include <rtems/libio_.h> |
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25 | |
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26 | /** |
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27 | * POSIX 1003.1b 6.2.1 Duplicate an Open File Descriptor |
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28 | */ |
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29 | int dup2( |
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30 | int fildes, |
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31 | int fildes2 |
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32 | ) |
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33 | { |
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34 | int status; |
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35 | struct stat buf; |
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36 | |
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37 | /* |
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38 | * If fildes is not valid, then fildes2 should not be closed. |
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39 | */ |
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40 | |
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41 | status = fstat( fildes, &buf ); |
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42 | if ( status == -1 ) |
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43 | return -1; |
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44 | |
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45 | /* |
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46 | * If fildes2 is not valid, then we should not do anything either. |
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47 | */ |
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48 | |
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49 | status = fstat( fildes2, &buf ); |
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50 | if ( status == -1 ) |
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51 | return -1; |
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52 | |
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53 | /* |
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54 | * This fcntl handles everything else. |
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55 | */ |
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56 | |
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57 | return fcntl( fildes, F_DUP2FD, fildes2 ); |
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58 | } |
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