source:
rtems/cpukit/libcsupport/src/getdents.c
@
9c3fa30
Last change on this file since 9c3fa30 was 9c3fa30, checked in by Joel Sherrill <joel.sherrill@…>, on 09/28/00 at 20:19:23 | |
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File size: 1.4 KB |
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1 | /* |
2 | * getdents() - Get Directory Entries |
3 | * |
4 | * SVR4 and SVID extension required by Newlib readdir() family. |
5 | * |
6 | * This routine will dd_len / (sizeof dirent) directory entries relative to |
7 | * the current directory position index. These entries will be placed in |
8 | * character array pointed to by -dd_buf- |
9 | * |
10 | * COPYRIGHT (c) 1989-1999. |
11 | * On-Line Applications Research Corporation (OAR). |
12 | * |
13 | * The license and distribution terms for this file may be |
14 | * found in the file LICENSE in this distribution or at |
15 | * http://www.OARcorp.com/rtems/license.html. |
16 | * |
17 | * $Id$ |
18 | */ |
19 | |
20 | #include <errno.h> |
21 | |
22 | #include "libio_.h" |
23 | |
24 | int getdents( |
25 | int dd_fd, |
26 | char *dd_buf, |
27 | int dd_len |
28 | ) |
29 | { |
30 | rtems_libio_t *iop; |
31 | rtems_filesystem_location_info_t loc; |
32 | |
33 | /* |
34 | * Get the file control block structure associated with the file descriptor |
35 | */ |
36 | |
37 | iop = rtems_libio_iop( dd_fd ); |
38 | |
39 | /* |
40 | * Make sure we are working on a directory |
41 | */ |
42 | loc = iop->pathinfo; |
43 | if ( !loc.ops->node_type_h ) |
44 | set_errno_and_return_minus_one( ENOTSUP ); |
45 | |
46 | if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) |
47 | set_errno_and_return_minus_one( ENOTDIR ); |
48 | |
49 | /* |
50 | * Return the number of bytes that were actually transfered as a result |
51 | * of the read attempt. |
52 | */ |
53 | |
54 | if ( !iop->handlers->read_h ) |
55 | set_errno_and_return_minus_one( ENOTSUP ); |
56 | |
57 | return (*iop->handlers->read_h)( iop, dd_buf, dd_len ); |
58 | } |
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