source: rtems/c/src/exec/libcsupport/src/readlink.c @ c7016198

4.104.114.84.95
Last change on this file since c7016198 was dd0f326, checked in by Joel Sherrill <joel.sherrill@…>, on 10/12/99 at 19:10:46

Added rtems_filesystem_freenode() macro and added calls at appropriate
places to make sure memory allocated for filesystem specifif nodes
gets freed.

  • 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) 1989-1998.
5 *  On-Line Applications Research Corporation (OAR).
6 *  Copyright assigned to U.S. Government, 1994.
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.OARcorp.com/rtems/license.html.
11 *
12 *  $Id$
13 */
14
15#include "libio_.h"
16
17int readlink(
18  const char *pathname,
19  char       *buf,
20  int         bufsize
21)
22{
23  rtems_filesystem_location_info_t  loc;
24  int                               result;
25
26  if (!buf)
27    set_errno_and_return_minus_one( EFAULT );
28
29  result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
30  if ( result != 0 )
31     return -1;
32 
33  if ( !loc.ops->node_type ){
34    rtems_filesystem_freenode( &loc );
35    set_errno_and_return_minus_one( ENOTSUP );
36  }
37
38  if (  (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
39    rtems_filesystem_freenode( &loc );
40    set_errno_and_return_minus_one( EINVAL );
41  }
42
43  if ( !loc.ops->readlink ){
44    rtems_filesystem_freenode( &loc );
45    set_errno_and_return_minus_one( ENOTSUP );
46  }
47
48  result =  (*loc.ops->readlink)( &loc, buf, bufsize );
49
50  rtems_filesystem_freenode( &loc );
51 
52  return result;
53}
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