4.104.114.84.95
Last change
on this file since 0162910 was
07a3253d,
checked in by Joel Sherrill <joel.sherrill@…>, on 11/23/98 at 19:07:58
|
Added base version of file system infrastructure. This includes a major
overhaul of the RTEMS system call interface. This base file system is
the "In-Memory File System" aka IMFS.
The design and implementation was done by the following people:
+ Joel Sherrill (joel@…)
+ Jennifer Averett (jennifer@…)
+ Steve "Mr Mount" Salitasc (salitasc@…)
+ Kerwin Wade (wade@…)
PROBLEMS
========
+ It is VERY likely that merging this will break the UNIX port. This
can/will be fixed.
+ There is likely some reentrancy/mutual exclusion needed.
+ Eventually, there should be a "mini-IMFS" description table to
eliminate links, symlinks, etc to save memory. All you need to
have "classic RTEMS" functionality is technically directories
and device IO. All the rest could be left out to save memory.
|
-
Property mode set to
100644
|
File size:
1.4 KB
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Line | |
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1 | /* |
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2 | * getdents() - Get Directory Entries |
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3 | * |
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4 | * SVR4 and SVID extension required by Newlib readdir() family. |
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5 | * |
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6 | * This routine will dd_len / (sizeof dirent) directory entries relative to |
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7 | * the current directory position index. These entries will be placed in |
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8 | * character array pointed to by -dd_buf- |
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9 | * |
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10 | * COPYRIGHT (c) 1989-1998. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * Copyright assigned to U.S. Government, 1994. |
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13 | * |
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14 | * The license and distribution terms for this file may be |
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15 | * found in the file LICENSE in this distribution or at |
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16 | * http://www.OARcorp.com/rtems/license.html. |
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17 | * |
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18 | * $Id$ |
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19 | */ |
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20 | |
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21 | #include <errno.h> |
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22 | |
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23 | #include "libio_.h" |
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24 | |
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25 | int getdents( |
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26 | int dd_fd, |
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27 | char *dd_buf, |
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28 | int dd_len |
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29 | ) |
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30 | { |
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31 | rtems_libio_t *iop; |
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32 | rtems_filesystem_location_info_t loc; |
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33 | |
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34 | /* |
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35 | * Get the file control block structure associated with the file descriptor |
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36 | */ |
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37 | |
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38 | iop = rtems_libio_iop( dd_fd ); |
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39 | |
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40 | /* |
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41 | * Make sure we are working on a directory |
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42 | */ |
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43 | loc = iop->pathinfo; |
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44 | if ( !loc.ops->node_type ) |
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45 | set_errno_and_return_minus_one( ENOTSUP ); |
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46 | |
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47 | if ( (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) |
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48 | set_errno_and_return_minus_one( ENOTDIR ); |
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49 | |
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50 | /* |
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51 | * Return the number of bytes that were actually transfered as a result |
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52 | * of the read attempt. |
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53 | */ |
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54 | |
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55 | if ( !iop->handlers->read ) |
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56 | set_errno_and_return_minus_one( ENOTSUP ); |
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57 | |
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58 | return (*iop->handlers->read)( iop, dd_buf, dd_len ); |
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59 | } |
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