Пример #1
0
int rtems_filesystem_evaluate_path(
  const char                        *pathname,
  size_t                             pathnamelen,
  int                                flags,
  rtems_filesystem_location_info_t  *pathloc,
  int                                follow_link
)
{
  int                           i = 0;

  /*
   * Verify Input parameters.
   */

  if ( !pathname )
    rtems_set_errno_and_return_minus_one( EFAULT );

  if ( !pathloc )
    rtems_set_errno_and_return_minus_one( EIO );       /* should never happen */

  /*
   * Evaluate the path using the optable evalpath.
   */

  rtems_filesystem_get_start_loc( pathname, &i, pathloc );

  /*
   * We evaluation the path relative to the start location we get got.
   */
  return rtems_filesystem_evaluate_relative_path( &pathname[i],
                                                  pathnamelen - i,
                                                  flags,
                                                  pathloc,
                                                  follow_link );
}
int symlink(
  const char *actualpath,
  const char *sympath
)
{
  rtems_filesystem_location_info_t    loc;
  int                                 i;
  const char                         *name_start;
  int                                 result;

  rtems_filesystem_get_start_loc( sympath, &i, &loc );

  if ( !loc.ops->evalformake_h ) {
    rtems_set_errno_and_return_minus_one( ENOTSUP );
  }

  result = (*loc.ops->evalformake_h)( &sympath[i], &loc, &name_start );
  if ( result != 0 )
    return -1;

  if ( !loc.ops->symlink_h ) {
    rtems_filesystem_freenode( &loc );
    rtems_set_errno_and_return_minus_one( ENOTSUP );
  }

  result = (*loc.ops->symlink_h)( &loc, actualpath, name_start);

  rtems_filesystem_freenode( &loc );

  return result;
}
Пример #3
0
int rmdir(
  const char *pathname
)
{
  int                               parentpathlen;
  const char                       *name;
  rtems_filesystem_location_info_t  parentloc;
  rtems_filesystem_location_info_t  loc;
  int                               i;
  int                               result;
  bool                              free_parentloc = false;

  /*
   *  Get the parent node of the node we wish to remove. Find the parent path.
   */

  parentpathlen = rtems_filesystem_dirname ( pathname );

  if ( parentpathlen == 0 )
    rtems_filesystem_get_start_loc( pathname, &i, &parentloc );
  else {
    result = rtems_filesystem_evaluate_path(pathname, parentpathlen,
                                            RTEMS_LIBIO_PERMS_WRITE,
                                            &parentloc,
                                            false );
    if ( result != 0 )
      return -1;

    free_parentloc = true;
  }

  /*
   * Start from the parent to find the node that should be under it.
   */

  loc = parentloc;
  name = pathname + parentpathlen;
  name += rtems_filesystem_prefix_separators( name, strlen( name ) );

  result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
                                                    0, &loc, false );
  if ( result != 0 ) {
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    return -1;
  }

  /*
   * Verify you can remove this node as a directory.
   */
  if ( (*loc.ops->node_type_h)( &loc ) != RTEMS_FILESYSTEM_DIRECTORY ) {
    rtems_filesystem_freenode( &loc );
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    rtems_set_errno_and_return_minus_one( ENOTDIR );
  }

  /*
   * Use the filesystems rmnod to remove the node.
   */

  result =  (*loc.handlers->rmnod_h)( &parentloc, &loc );

  rtems_filesystem_freenode( &loc );
  if ( free_parentloc )
    rtems_filesystem_freenode( &parentloc );

  return result;
}
Пример #4
0
int unlink(
  const char *path
)
{
  int                               parentpathlen;
  const char                       *name;
  rtems_filesystem_location_info_t  parentloc;
  rtems_filesystem_location_info_t  loc;
  int                               i;
  int                               result;
  bool                              free_parentloc = false;

  /*
   * Get the node to be unlinked. Find the parent path first.
   */

  parentpathlen = rtems_filesystem_dirname ( path );

  if ( parentpathlen == 0 )
    rtems_filesystem_get_start_loc( path, &i, &parentloc );
  else {
    result = rtems_filesystem_evaluate_path( path, parentpathlen,
                                             RTEMS_LIBIO_PERMS_WRITE,
                                             &parentloc,
                                             false );
    if ( result != 0 )
      return -1;

    free_parentloc = true;
  }

  /*
   * Start from the parent to find the node that should be under it.
   */

  loc = parentloc;
  name = path + parentpathlen;
  name += rtems_filesystem_prefix_separators( name, strlen( name ) );

  result = rtems_filesystem_evaluate_relative_path( name , strlen( name ),
                                                    0, &loc, false );
  if ( result != 0 ) {
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    return -1;
  }

  if ( !loc.ops->node_type_h ) {
    rtems_filesystem_freenode( &loc );
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    rtems_set_errno_and_return_minus_one( ENOTSUP );
  }

  if (  (*loc.ops->node_type_h)( &loc ) == RTEMS_FILESYSTEM_DIRECTORY ) {
    rtems_filesystem_freenode( &loc );
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    rtems_set_errno_and_return_minus_one( EISDIR );
  }

  if ( !loc.ops->unlink_h ) {
    rtems_filesystem_freenode( &loc );
    if ( free_parentloc )
      rtems_filesystem_freenode( &parentloc );
    rtems_set_errno_and_return_minus_one( ENOTSUP );
  }

  result = (*loc.ops->unlink_h)( &parentloc, &loc );

  rtems_filesystem_freenode( &loc );
  if ( free_parentloc )
    rtems_filesystem_freenode( &parentloc );

  return result;
}