source: rtems/c/src/lib/libc/link.c @ 4bfb139

4.104.114.84.95
Last change on this file since 4bfb139 was d006519b, checked in by Joel Sherrill <joel.sherrill@…>, on Apr 15, 1999 at 7:01:32 PM

Added reentrant versions.

  • Property mode set to 100644
File size: 1.8 KB
Line 
1/*
2 *  link() - POSIX 1003.1b - 5.3.4 - Create a new link
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 <rtems.h>
16#include <rtems/libio.h>
17#include <errno.h>
18
19#include "libio_.h"
20
21int link(
22  const char *existing,
23  const char *new
24)
25{
26  rtems_filesystem_location_info_t    existing_loc;
27  rtems_filesystem_location_info_t    parent_loc;
28  int                                 i;
29  int                                 result;
30  const char                         *name_start;
31
32  /*
33   * Get the node we are linking to.
34   */
35  result = rtems_filesystem_evaluate_path( existing, 0, &existing_loc, TRUE );
36  if ( result != 0 )
37     return -1;
38
39  /*
40   * Get the parent of the node we are creating.
41   */
42
43  rtems_filesystem_get_start_loc( new, &i, &parent_loc );
44  result = (*parent_loc.ops->evalformake)( &new[i], &parent_loc, &name_start );
45  if ( result != 0 )
46     set_errno_and_return_minus_one( result );
47
48  /*
49   *  Check to see if the caller is trying to link across file system
50   *  boundaries.
51   */
52
53  if ( parent_loc.mt_entry != existing_loc.mt_entry )
54    set_errno_and_return_minus_one( EXDEV );
55
56  if ( !parent_loc.ops->link )
57    set_errno_and_return_minus_one( ENOTSUP );
58
59  return (*parent_loc.ops->link)( &existing_loc, &parent_loc, name_start );
60}
61
62/*
63 *  _link_r
64 *
65 *  This is the Newlib dependent reentrant version of link().
66 */
67
68#if defined(RTEMS_NEWLIB)
69
70#include <reent.h>
71
72int _link_r(
73  struct _reent *ptr,
74  const char    *existing,
75  const char    *new
76)
77{
78  return link( existing, new );
79}
80#endif
81
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