source: rtems/c/src/lib/libc/getdents.c @ 073e2411

4.104.114.84.95
Last change on this file since 073e2411 was 08311cc3, checked in by Joel Sherrill <joel.sherrill@…>, on 11/17/99 at 17:51:34

Updated copyright notice.

  • Property mode set to 100644
File size: 1.4 KB
Line 
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
24int 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 )
44    set_errno_and_return_minus_one( ENOTSUP );
45   
46  if ( (*loc.ops->node_type)( &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 )
55    set_errno_and_return_minus_one( ENOTSUP );
56
57  return (*iop->handlers->read)( iop, dd_buf, dd_len  );
58}
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