| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.os; |
| |
| import android.util.Log; |
| |
| import com.android.internal.os.IShellCallback; |
| |
| /** |
| * Special-purpose API for use with {@link IBinder#shellCommand IBinder.shellCommand} for |
| * performing operations back on the invoking shell. |
| * @hide |
| */ |
| public class ShellCallback implements Parcelable { |
| final static String TAG = "ShellCallback"; |
| |
| final static boolean DEBUG = false; |
| |
| final boolean mLocal; |
| |
| IShellCallback mShellCallback; |
| |
| class MyShellCallback extends IShellCallback.Stub { |
| public ParcelFileDescriptor openFile(String path, String seLinuxContext, |
| String mode) { |
| return onOpenFile(path, seLinuxContext, mode); |
| } |
| } |
| |
| /** |
| * Create a new ShellCallback to receive requests. |
| */ |
| public ShellCallback() { |
| mLocal = true; |
| } |
| |
| /** |
| * Ask the shell to open a file. If opening for writing, will truncate the file if it |
| * already exists and will create the file if it doesn't exist. |
| * @param path Path of the file to be opened/created. |
| * @param seLinuxContext Optional SELinux context that must be allowed to have |
| * access to the file; if null, nothing is required. |
| * @param mode Mode to open file in: "r" for input/reading an existing file, |
| * "r+" for reading/writing an existing file, "w" for output/writing a new file (either |
| * creating or truncating an existing one), "w+" for reading/writing a new file (either |
| * creating or truncating an existing one). |
| */ |
| public ParcelFileDescriptor openFile(String path, String seLinuxContext, String mode) { |
| if (DEBUG) Log.d(TAG, "openFile " + this + " mode=" + mode + ": mLocal=" + mLocal |
| + " mShellCallback=" + mShellCallback); |
| |
| if (mLocal) { |
| return onOpenFile(path, seLinuxContext, mode); |
| } |
| |
| if (mShellCallback != null) { |
| try { |
| return mShellCallback.openFile(path, seLinuxContext, mode); |
| } catch (RemoteException e) { |
| Log.w(TAG, "Failure opening " + path, e); |
| } |
| } |
| return null; |
| } |
| |
| public ParcelFileDescriptor onOpenFile(String path, String seLinuxContext, String mode) { |
| return null; |
| } |
| |
| public static void writeToParcel(ShellCallback callback, Parcel out) { |
| if (callback == null) { |
| out.writeStrongBinder(null); |
| } else { |
| callback.writeToParcel(out, 0); |
| } |
| } |
| |
| public int describeContents() { |
| return 0; |
| } |
| |
| public void writeToParcel(Parcel out, int flags) { |
| synchronized (this) { |
| if (mShellCallback == null) { |
| mShellCallback = new MyShellCallback(); |
| } |
| out.writeStrongBinder(mShellCallback.asBinder()); |
| } |
| } |
| |
| ShellCallback(Parcel in) { |
| mLocal = false; |
| mShellCallback = IShellCallback.Stub.asInterface(in.readStrongBinder()); |
| } |
| |
| public static final Parcelable.Creator<ShellCallback> CREATOR |
| = new Parcelable.Creator<ShellCallback>() { |
| public ShellCallback createFromParcel(Parcel in) { |
| return new ShellCallback(in); |
| } |
| public ShellCallback[] newArray(int size) { |
| return new ShellCallback[size]; |
| } |
| }; |
| } |