1 package org.apache.maven.wagon;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 /**
23 * Utility class for common operations for file/directory permissions.
24 *
25 * @author <a href="mailto:juam at users.sourceforge.net">Juan F. Codagnone</a>
26 * @see PermissionModeUtils
27 * @since Sep 3, 2005
28 */
29 public final class PermissionModeUtils
30 {
31 private PermissionModeUtils()
32 {
33 }
34
35 /**
36 * See the System Interfaces volume of IEEE Std 1003.1-2001, umask(1)
37 *
38 * @param modeStr permission mode (numeric or symbolic)
39 * @return the mode that can be used with umask to accomplish modeStr.
40 */
41 public static String getUserMaskFor( String modeStr )
42 {
43 String ret = null;
44
45 try
46 {
47 int mode = Integer.valueOf( modeStr, 8 ).intValue();
48
49 mode = mode % 8 + ( ( mode / 8 ) % 8 ) * 8 + ( ( mode / 64 ) % 8 ) * 64;
50
51 // CHECKSTYLE_OFF: MagicNumber
52 ret = Integer.toOctalString( 0777 - mode );
53 // CHECKSTYLE_ON: MagicNumber
54 }
55 catch ( final NumberFormatException e )
56 {
57 try
58 {
59 Integer.parseInt( modeStr );
60 }
61 catch ( final NumberFormatException e1 )
62 {
63 ret = modeStr;
64 }
65 }
66
67 if ( ret == null )
68 {
69 throw new IllegalArgumentException( "The mode is a number but is not octal" );
70 }
71
72 return ret;
73 }
74 }