1 /* 2 * Copyright (C) 2014 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.io; 18 19 import com.google.common.annotations.Beta; 20 import com.google.common.annotations.GwtIncompatible; 21 import com.google.j2objc.annotations.J2ObjCIncompatible; 22 import java.nio.file.SecureDirectoryStream; 23 24 /** 25 * Options for use with recursive delete methods ({@link MoreFiles#deleteRecursively} and {@link 26 * MoreFiles#deleteDirectoryContents}). 27 * 28 * @since 21.0 29 * @author Colin Decker 30 */ 31 @Beta 32 @GwtIncompatible 33 @J2ObjCIncompatible // java.nio.file 34 @ElementTypesAreNonnullByDefault 35 public enum RecursiveDeleteOption { 36 /** 37 * Specifies that the recursive delete should not throw an exception when it can't be guaranteed 38 * that it can be done securely, without vulnerability to race conditions (i.e. when the file 39 * system does not support {@link SecureDirectoryStream}). 40 * 41 * <p><b>Warning:</b> On a file system that supports symbolic links, it is possible for an 42 * insecure recursive delete to delete files and directories that are <i>outside</i> the directory 43 * being deleted. This can happen if, after checking that a file is a directory (and not a 44 * symbolic link), that directory is deleted and replaced by a symbolic link to an outside 45 * directory before the call that opens the directory to read its entries. File systems that 46 * support {@code SecureDirectoryStream} do not have this vulnerability. 47 */ 48 ALLOW_INSECURE 49 } 50