1 /*
2  * Copyright (C) 2011 The Android Open Source Project
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.android.compatibility.common.util;
18 
19 import java.io.ByteArrayOutputStream;
20 import java.io.File;
21 import java.io.FileOutputStream;
22 import java.io.IOException;
23 import java.io.InputStream;
24 
25 /** Bits and pieces copied from hidden API of android.os.FileUtils. */
26 public class FileUtils {
27 
28     public static final int S_IFMT  = 0170000;
29     public static final int S_IFSOCK = 0140000;
30     public static final int S_IFLNK = 0120000;
31     public static final int S_IFREG = 0100000;
32     public static final int S_IFBLK = 0060000;
33     public static final int S_IFDIR = 0040000;
34     public static final int S_IFCHR = 0020000;
35     public static final int S_IFIFO = 0010000;
36 
37     public static final int S_ISUID = 0004000;
38     public static final int S_ISGID = 0002000;
39     public static final int S_ISVTX = 0001000;
40 
41     public static final int S_IRWXU = 00700;
42     public static final int S_IRUSR = 00400;
43     public static final int S_IWUSR = 00200;
44     public static final int S_IXUSR = 00100;
45 
46     public static final int S_IRWXG = 00070;
47     public static final int S_IRGRP = 00040;
48     public static final int S_IWGRP = 00020;
49     public static final int S_IXGRP = 00010;
50 
51     public static final int S_IRWXO = 00007;
52     public static final int S_IROTH = 00004;
53     public static final int S_IWOTH = 00002;
54     public static final int S_IXOTH = 00001;
55 
56     static {
57         System.loadLibrary("cts_jni");
58     }
59 
60     public static class FileStatus {
61 
62         public int dev;
63         public int ino;
64         public int mode;
65         public int nlink;
66         public int uid;
67         public int gid;
68         public int rdev;
69         public long size;
70         public int blksize;
71         public long blocks;
72         public long atime;
73         public long mtime;
74         public long ctime;
75 
hasModeFlag(int flag)76         public boolean hasModeFlag(int flag) {
77             if (((S_IRWXU | S_IRWXG | S_IRWXO) & flag) != flag) {
78                 throw new IllegalArgumentException("Inappropriate flag " + flag);
79             }
80             return (mode & flag) == flag;
81         }
82 
isOfType(int type)83         public boolean isOfType(int type) {
84             if ((type & S_IFMT) != type) {
85                 throw new IllegalArgumentException("Unknown type " + type);
86             }
87             return (mode & S_IFMT) == type;
88         }
89     }
90 
91     /**
92      * @param path of the file to stat
93      * @param status object to set the fields on
94      * @param statLinks or don't stat links (lstat vs stat)
95      * @return whether or not we were able to stat the file
96      */
getFileStatus(String path, FileStatus status, boolean statLinks)97     public native static boolean getFileStatus(String path, FileStatus status, boolean statLinks);
98 
getUserName(int uid)99     public native static String getUserName(int uid);
100 
getGroupName(int gid)101     public native static String getGroupName(int gid);
102 
setPermissions(String file, int mode)103     public native static int setPermissions(String file, int mode);
104 
105     /**
106      * Copy data from a source stream to destFile.
107      * Return true if succeed, return false if failed.
108      */
copyToFile(InputStream inputStream, File destFile)109     public static boolean copyToFile(InputStream inputStream, File destFile) {
110         try {
111             if (destFile.exists()) {
112                 destFile.delete();
113             }
114             FileOutputStream out = new FileOutputStream(destFile);
115             try {
116                 byte[] buffer = new byte[4096];
117                 int bytesRead;
118                 while ((bytesRead = inputStream.read(buffer)) >= 0) {
119                     out.write(buffer, 0, bytesRead);
120                 }
121             } finally {
122                 out.flush();
123                 try {
124                     out.getFD().sync();
125                 } catch (IOException e) {
126                 }
127                 out.close();
128             }
129             return true;
130         } catch (IOException e) {
131             return false;
132         }
133     }
134 
createFile(File file, int numBytes)135     public static void createFile(File file, int numBytes) throws IOException {
136         File parentFile = file.getParentFile();
137         if (parentFile != null) {
138             parentFile.mkdirs();
139         }
140         byte[] buffer = new byte[numBytes];
141         FileOutputStream output = new FileOutputStream(file);
142         try {
143             output.write(buffer);
144         } finally {
145             output.close();
146         }
147     }
148 
readInputStreamFully(InputStream is)149     public static byte[] readInputStreamFully(InputStream is) {
150         ByteArrayOutputStream os = new ByteArrayOutputStream();
151         byte[] buffer = new byte[32768];
152         int count;
153         try {
154             while ((count = is.read(buffer)) != -1) {
155                 os.write(buffer, 0, count);
156             }
157             is.close();
158         } catch (IOException e) {
159             throw new RuntimeException(e);
160         }
161         return os.toByteArray();
162     }
163 }
164