1 /*
2  * Copyright (C) 2024 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.adservices.common;
18 
19 import static android.os.Build.VERSION.SDK_INT;
20 
21 import android.app.UiAutomation;
22 import android.os.ParcelFileDescriptor;
23 import android.util.Log;
24 
25 import androidx.test.platform.app.InstrumentationRegistry;
26 
27 import com.android.adservices.shared.testing.AndroidLogger;
28 import com.android.adservices.shared.testing.shell.CommandResult;
29 import com.android.compatibility.common.util.FileUtils;
30 import com.android.compatibility.common.util.SystemUtil;
31 
32 import java.io.FileInputStream;
33 import java.io.IOException;
34 
35 /** Device-side implementation of {@link AbstractAdServicesShellCommandHelper}. */
36 public final class AdServicesShellCommandHelper extends AbstractAdServicesShellCommandHelper {
AdServicesShellCommandHelper()37     public AdServicesShellCommandHelper() {
38         super(AdServicesSupportHelper.getInstance(), AndroidLogger.getInstance());
39     }
40 
41     private static final int OUT_DESCRIPTOR_INDEX = 0;
42     private static final int IN_DESCRIPTOR_INDEX = 1;
43     private static final int ERR_DESCRIPTOR_INDEX = 2;
44 
45     @Override
runShellCommand(String cmd)46     protected String runShellCommand(String cmd) {
47         return SystemUtil.runShellCommand(cmd).strip();
48     }
49 
50     @Override
runShellCommandRwe(String cmd)51     protected CommandResult runShellCommandRwe(String cmd) {
52         String out = "";
53         String err = "";
54         try {
55             ParcelFileDescriptor[] fds = executeShellCommandRwe(cmd);
56             ParcelFileDescriptor fdOut = fds[OUT_DESCRIPTOR_INDEX];
57             ParcelFileDescriptor fdIn = fds[IN_DESCRIPTOR_INDEX];
58             ParcelFileDescriptor fdErr = fds[ERR_DESCRIPTOR_INDEX];
59 
60             if (fdIn != null) {
61                 try {
62                     // not using stdin
63                     fdIn.close();
64                 } catch (Exception e) {
65                     // Ignore
66                 }
67             }
68 
69             try (FileInputStream fis = new ParcelFileDescriptor.AutoCloseInputStream(fdOut)) {
70                 out = new String(FileUtils.readInputStreamFully(fis)).strip();
71             }
72             try (FileInputStream fis = new ParcelFileDescriptor.AutoCloseInputStream(fdErr)) {
73                 err = new String(FileUtils.readInputStreamFully(fis)).strip();
74             }
75             return new CommandResult(out, err);
76         } catch (IOException e) {
77             Log.e(TAG, "Exception occurred while reading file descriptor: ", e);
78             return new CommandResult(out, e.getMessage());
79         }
80     }
81 
82     @Override
getDeviceApiLevel()83     protected int getDeviceApiLevel() {
84         return SDK_INT;
85     }
86 
executeShellCommandRwe(String cmd)87     private static ParcelFileDescriptor[] executeShellCommandRwe(String cmd) {
88         UiAutomation uiAutomation = InstrumentationRegistry.getInstrumentation().getUiAutomation();
89         return uiAutomation.executeShellCommandRwe(cmd);
90     }
91 }
92