Synnefo » snf-ganeti » ganeti-local

from ganeti import pathutils

def _CheckFileStoragePath(path, allowed):

  """Checks if a path is in a list of allowed paths for file storage.

  @type path: string

  @param path: Path to check

  @type allowed: list

  @param allowed: List of allowed paths

  @raise errors.FileStoragePathError: If the path is not allowed

  """

  if not os.path.isabs(path):

    raise errors.FileStoragePathError("File storage path must be absolute,"

                                      " got '%s'" % path)

  for i in allowed:

    if not os.path.isabs(i):

      logging.info("Ignoring relative path '%s' for file storage", i)

      continue

    if utils.IsBelowDir(i, path):

      break

  else:

    raise errors.FileStoragePathError("Path '%s' is not acceptable for file"

                                      " storage" % path)

def LoadAllowedFileStoragePaths(filename):

  """Loads file containing allowed file storage paths.

  @rtype: list

  @return: List of allowed paths (can be an empty list)

  """

  try:

    contents = utils.ReadFile(filename)

  except EnvironmentError:

    return []

  else:

    return utils.FilterEmptyLinesAndComments(contents)

def CheckFileStoragePath(path, _filename=pathutils.FILE_STORAGE_PATHS_FILE):

  """Checks if a path is allowed for file storage.

  @type path: string

  @param path: Path to check

  @raise errors.FileStoragePathError: If the path is not allowed

  """

  _CheckFileStoragePath(path, LoadAllowedFileStoragePaths(_filename))