source: rtems/c/src/lib/libc/readlink.c @ 4a238002

4.104.114.84.95
Last change on this file since 4a238002 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: 1.2 KB
Line 
1/*
2 *  readlink() - POSIX 1003.1b - X.X.X - XXX
3 *
4 *  COPYRIGHT (c) 1989-1999.
5 *  On-Line Applications Research Corporation (OAR).
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.OARcorp.com/rtems/license.html.
10 *
11 *  $Id$
12 */
13
14#include "libio_.h"
15
16int readlink(
17  const char *pathname,
18  char       *buf,
19  int         bufsize
20)
21{
22  rtems_filesystem_location_info_t  loc;
23  int                               result;
24
25  if (!buf)
26    set_errno_and_return_minus_one( EFAULT );
27
28  result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
29  if ( result != 0 )
30     return -1;
31 
32  if ( !loc.ops->node_type ){
33    rtems_filesystem_freenode( &loc );
34    set_errno_and_return_minus_one( ENOTSUP );
35  }
36
37  if (  (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
38    rtems_filesystem_freenode( &loc );
39    set_errno_and_return_minus_one( EINVAL );
40  }
41
42  if ( !loc.ops->readlink ){
43    rtems_filesystem_freenode( &loc );
44    set_errno_and_return_minus_one( ENOTSUP );
45  }
46
47  result =  (*loc.ops->readlink)( &loc, buf, bufsize );
48
49  rtems_filesystem_freenode( &loc );
50 
51  return result;
52}
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