source: rtems/cpukit/libfs/src/imfs/imfs_link.c @ 9ba0e55

4.104.115
Last change on this file since 9ba0e55 was 9ba0e55, checked in by Joel Sherrill <joel.sherrill@…>, on 01/18/10 at 23:39:31

2010-01-18 Joel Sherrill <joel.sherrill@…>

Coverity Id 19
Coverity Id 20
Coverity Id 21

  • libfs/src/imfs/imfs_link.c, libfs/src/imfs/imfs_load_tar.c, libfs/src/imfs/imfs_mknod.c: Add comment to explain allocation is for life of file, not scope of method.
  • Property mode set to 100644
File size: 1.8 KB
Line 
1/*
2 *  IMFS_link
3 *
4 *  The following rouine creates a new link node under parent with the
5 *  name given in name.  The link node is set to point to the node at
6 *  to_loc.
7 *
8 *  COPYRIGHT (c) 1989-2010.
9 *  On-Line Applications Research Corporation (OAR).
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.rtems.com/license/LICENSE.
14 *
15 *  $Id$
16 */
17
18#if HAVE_CONFIG_H
19#include "config.h"
20#endif
21
22#include <errno.h>
23#include "imfs.h"
24#include <rtems/libio_.h>
25#include <rtems/seterr.h>
26
27int IMFS_link(
28  rtems_filesystem_location_info_t  *to_loc,      /* IN */
29  rtems_filesystem_location_info_t  *parent_loc,  /* IN */
30  const char                        *token        /* IN */
31)
32{
33  IMFS_types_union   info;
34  IMFS_jnode_t      *new_node;
35  char               new_name[ IMFS_NAME_MAX + 1 ];
36  int                i;
37
38  /*
39   *  Verify this node can be linked to.
40   */
41
42  info.hard_link.link_node = to_loc->node_access;
43  if ( info.hard_link.link_node->st_nlink >= LINK_MAX )
44    rtems_set_errno_and_return_minus_one( EMLINK );
45
46  /*
47   * Remove any separators at the end of the string.
48   */
49
50  IMFS_get_token( token, strlen( token ), new_name, &i );
51
52  /*
53   *  Create a new link node.
54   *
55   * NOTE: Coverity thinks this is a resource leak since a node
56   *       is created but never deleted.  The scope of the allocation
57   *       is that of a file -- not this method.  Coverity Id 19.
58   */
59
60  new_node = IMFS_create_node(
61    parent_loc,
62    IMFS_HARD_LINK,
63    new_name,
64    ( S_IFLNK | ( S_IRWXU | S_IRWXG | S_IRWXO )),
65    &info
66  );
67
68  if ( !new_node )
69    rtems_set_errno_and_return_minus_one( ENOMEM );
70
71  /*
72   * Increment the link count of the node being pointed to.
73   */
74
75  info.hard_link.link_node->st_nlink++;
76  IMFS_update_ctime( info.hard_link.link_node );
77
78  return 0;
79}
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