1 /*
2  * Copyright (C) 2017 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.cts.storageapp;
18 
19 import android.content.Context;
20 import android.system.Os;
21 import android.system.OsConstants;
22 import android.system.StructUtsname;
23 import android.util.Log;
24 
25 import junit.framework.AssertionFailedError;
26 
27 import java.io.BufferedReader;
28 import java.io.ByteArrayOutputStream;
29 import java.io.File;
30 import java.io.FileDescriptor;
31 import java.io.FileOutputStream;
32 import java.io.FileReader;
33 import java.io.IOException;
34 import java.io.InputStream;
35 import java.io.OutputStream;
36 import java.util.Arrays;
37 import java.util.regex.Matcher;
38 import java.util.regex.Pattern;
39 
40 public class Utils {
41     public static final String TAG = "StorageApp";
42 
43     public static final String PKG_A = "com.android.cts.storageapp_a";
44     public static final String PKG_B = "com.android.cts.storageapp_b";
45 
46     // You will pry my kibibytes from my cold dead hands! But to make test
47     // results easier to debug, we'll use kilobytes...
48     public static final long KB_IN_BYTES = 1000;
49     public static final long MB_IN_BYTES = KB_IN_BYTES * 1000;
50     public static final long GB_IN_BYTES = MB_IN_BYTES * 1000;
51 
52     public static final long DATA_INT = (2 + 3 + 5 + 13 + 17 + 19 + 23) * MB_IN_BYTES;
53     public static final long DATA_EXT = (7 + 11) * MB_IN_BYTES;
54     public static final long DATA_ALL = DATA_INT + DATA_EXT; // 100MB
55 
56     public static final long CACHE_INT = (3 + 5 + 17 + 19 + 23) * MB_IN_BYTES;
57     public static final long CACHE_EXT = (11) * MB_IN_BYTES;
58     public static final long CACHE_ALL = CACHE_INT + CACHE_EXT; // 78MB
59 
60     public static final long CODE_ALL = 29 * MB_IN_BYTES;
61 
useSpace(Context c)62     public static void useSpace(Context c) throws Exception {
63         // We use prime numbers for all values so that we can easily identify
64         // which file(s) are missing from broken test results.
65         useWrite(makeUniqueFile(c.getFilesDir()), 2 * MB_IN_BYTES);
66         useWrite(makeUniqueFile(c.getCodeCacheDir()), 3 * MB_IN_BYTES);
67         useWrite(makeUniqueFile(c.getCacheDir()), 5 * MB_IN_BYTES);
68         useWrite(makeUniqueFile(c.getExternalFilesDir("meow")), 7 * MB_IN_BYTES);
69         useWrite(makeUniqueFile(c.getExternalCacheDir()), 11 * MB_IN_BYTES);
70 
71         useFallocate(makeUniqueFile(c.getFilesDir()), 13 * MB_IN_BYTES);
72         useFallocate(makeUniqueFile(c.getCodeCacheDir()), 17 * MB_IN_BYTES);
73         useFallocate(makeUniqueFile(c.getCacheDir()), 19 * MB_IN_BYTES);
74         final File subdir = makeUniqueFile(c.getCacheDir());
75         Os.mkdir(subdir.getAbsolutePath(), 0700);
76         useFallocate(makeUniqueFile(subdir), 23 * MB_IN_BYTES);
77 
78         useWrite(makeUniqueFile(c.getObbDir()), 29 * MB_IN_BYTES);
79     }
80 
assertAtLeast(long expected, long actual)81     public static void assertAtLeast(long expected, long actual) {
82         if (actual < expected) {
83             throw new AssertionFailedError("Expected at least " + expected + " but was " + actual
84                     + " [" + android.os.Process.myUserHandle() + "]");
85         }
86     }
87 
assertMostlyEquals(long expected, long actual)88     public static void assertMostlyEquals(long expected, long actual) {
89         assertMostlyEquals(expected, actual, 500 * KB_IN_BYTES);
90     }
91 
assertMostlyEquals(long expected, long actual, long delta)92     public static void assertMostlyEquals(long expected, long actual, long delta) {
93         if (Math.abs(expected - actual) > delta) {
94             throw new AssertionFailedError("Expected roughly " + expected + " but was " + actual
95                     + " [" + android.os.Process.myUserHandle() + "]");
96         }
97     }
98 
makeUniqueFile(File dir)99     public static File makeUniqueFile(File dir) {
100         return new File(dir, Long.toString(System.nanoTime()));
101     }
102 
useWrite(File file, long size)103     public static File useWrite(File file, long size) throws Exception {
104         try (FileOutputStream os = new FileOutputStream(file)) {
105             final byte[] buf = new byte[1024];
106             while (size > 0) {
107                 os.write(buf, 0, (int) Math.min(buf.length, size));
108                 size -= buf.length;
109             }
110         }
111         return file;
112     }
113 
useFallocate(File file, long length, long time)114     public static File useFallocate(File file, long length, long time) throws Exception {
115         final File res = useFallocate(file, length);
116         file.setLastModified(time);
117         return res;
118     }
119 
useFallocate(File file, long length)120     public static File useFallocate(File file, long length) throws Exception {
121         final FileDescriptor fd = Os.open(file.getAbsolutePath(),
122                 OsConstants.O_CREAT | OsConstants.O_RDWR | OsConstants.O_TRUNC, 0700);
123         try {
124             Os.posix_fallocate(fd, 0, length);
125         } finally {
126             Os.close(fd);
127         }
128         return file;
129     }
130 
getSizeManual(File dir)131     public static long getSizeManual(File dir) throws Exception {
132         return getSizeManual(dir, false);
133     }
134 
getSizeManual(File dir, boolean excludeObb)135     public static long getSizeManual(File dir, boolean excludeObb) throws Exception {
136         long size = getAllocatedSize(dir);
137         File[] files = dir.listFiles();
138 
139         if (files == null) {
140             // This can happen on devices with scoped storage, where we're not allowed
141             // to iterate Android/ anymore.
142             return size;
143         }
144 
145         for (File f : files) {
146             if (f.isDirectory()) {
147                 if (excludeObb && f.getName().equalsIgnoreCase("obb")
148                         && f.getParentFile().getName().equalsIgnoreCase("Android")) {
149                     Log.d(TAG, "Ignoring OBB directory " + f);
150                 } else {
151                     size += getSizeManual(f, excludeObb);
152                 }
153             } else {
154                 size += getAllocatedSize(f);
155             }
156         }
157         return size;
158     }
159 
getAllocatedSize(File f)160     private static long getAllocatedSize(File f) throws Exception {
161         return Os.lstat(f.getAbsolutePath()).st_blocks * 512 /
162                Os.lstat(f.getAbsolutePath()).st_blksize *
163                Os.lstat(f.getAbsolutePath()).st_blksize ;
164     }
165 
deleteContents(File dir)166     public static boolean deleteContents(File dir) {
167         File[] files = dir.listFiles();
168         boolean success = true;
169         if (files != null) {
170             for (File file : files) {
171                 if (file.isDirectory()) {
172                     success &= deleteContents(file);
173                 }
174                 if (!file.delete()) {
175                     success = false;
176                 }
177             }
178         }
179         return success;
180     }
181 
logCommand(String... cmd)182     public static void logCommand(String... cmd) throws Exception {
183         final Process proc = new ProcessBuilder(cmd).redirectErrorStream(true).start();
184 
185         final ByteArrayOutputStream buf = new ByteArrayOutputStream();
186         copy(proc.getInputStream(), buf);
187         final int res = proc.waitFor();
188 
189         Log.d(TAG, Arrays.toString(cmd) + " result " + res + ":");
190         Log.d(TAG, buf.toString());
191     }
192 
193     /** Shamelessly lifted from libcore.io.Streams */
copy(InputStream in, OutputStream out)194     public static int copy(InputStream in, OutputStream out) throws IOException {
195         int total = 0;
196         byte[] buffer = new byte[8192];
197         int c;
198         while ((c = in.read(buffer)) != -1) {
199             total += c;
200             out.write(buffer, 0, c);
201         }
202         return total;
203     }
204 }
205