code: func importFileDescriptors() ([]FileDescriptor, error) {
  	// These files may be passed in by the parent process
  	filesString := os.Getenv(teleportFilesEnvVar)
  	if filesString == "" {
  		return nil, nil
  	}
  
  	files, err := filesFromString(filesString)
  	if err != nil {
  		return nil, trace.BadParameter("child process has failed to read files, error %q", err)
  	}
  
  	if len(files) != 0 {
  		log.Infof("Child has been passed files: %v", files)
  	}
  
  	return files, nil
  }
docs: // importFileDescriptors imports file descriptors from environment if there are any