| /* |
| * 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 com.android.providers.settings; |
| |
| import android.app.ActivityManager; |
| import android.content.IContentProvider; |
| import android.content.pm.PackageManager; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.Bundle; |
| import android.os.Process; |
| import android.os.RemoteException; |
| import android.os.ResultReceiver; |
| import android.os.ShellCallback; |
| import android.os.ShellCommand; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| |
| final public class SettingsService extends Binder { |
| final SettingsProvider mProvider; |
| |
| public SettingsService(SettingsProvider provider) { |
| mProvider = provider; |
| } |
| |
| @Override |
| public void onShellCommand(FileDescriptor in, FileDescriptor out, FileDescriptor err, |
| String[] args, ShellCallback callback, ResultReceiver resultReceiver) { |
| (new MyShellCommand(mProvider, false)).exec( |
| this, in, out, err, args, callback, resultReceiver); |
| } |
| |
| @Override |
| protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| if (mProvider.getContext().checkCallingPermission(android.Manifest.permission.DUMP) |
| != PackageManager.PERMISSION_GRANTED) { |
| pw.println("Permission Denial: can't dump SettingsProvider from from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid() |
| + " without permission " |
| + android.Manifest.permission.DUMP); |
| return; |
| } |
| |
| int opti = 0; |
| boolean dumpAsProto = false; |
| while (opti < args.length) { |
| String opt = args[opti]; |
| if (opt == null || opt.length() <= 0 || opt.charAt(0) != '-') { |
| break; |
| } |
| opti++; |
| if ("-h".equals(opt)) { |
| MyShellCommand.dumpHelp(pw, true); |
| return; |
| } else if ("--proto".equals(opt)) { |
| dumpAsProto = true; |
| } else { |
| pw.println("Unknown argument: " + opt + "; use -h for help"); |
| } |
| } |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| if (dumpAsProto) { |
| mProvider.dumpProto(fd); |
| } else { |
| mProvider.dumpInternal(fd, pw, args); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| final static class MyShellCommand extends ShellCommand { |
| final SettingsProvider mProvider; |
| final boolean mDumping; |
| |
| enum CommandVerb { |
| UNSPECIFIED, |
| GET, |
| PUT, |
| DELETE, |
| LIST, |
| RESET, |
| } |
| |
| int mUser = -1; // unspecified |
| CommandVerb mVerb = CommandVerb.UNSPECIFIED; |
| String mTable = null; |
| String mKey = null; |
| String mValue = null; |
| String mPackageName = null; |
| String mTag = null; |
| int mResetMode = -1; |
| boolean mMakeDefault; |
| |
| MyShellCommand(SettingsProvider provider, boolean dumping) { |
| mProvider = provider; |
| mDumping = dumping; |
| } |
| |
| @Override |
| public int onCommand(String cmd) { |
| if (cmd == null) { |
| return handleDefaultCommands(cmd); |
| } |
| |
| final PrintWriter perr = getErrPrintWriter(); |
| |
| boolean valid = false; |
| String arg = cmd; |
| do { |
| if ("--user".equals(arg)) { |
| if (mUser != -1) { |
| // --user specified more than once; invalid |
| break; |
| } |
| arg = getNextArgRequired(); |
| if ("current".equals(arg) || "cur".equals(arg)) { |
| mUser = UserHandle.USER_CURRENT; |
| } else { |
| mUser = Integer.parseInt(arg); |
| } |
| } else if (mVerb == CommandVerb.UNSPECIFIED) { |
| if ("get".equalsIgnoreCase(arg)) { |
| mVerb = CommandVerb.GET; |
| } else if ("put".equalsIgnoreCase(arg)) { |
| mVerb = CommandVerb.PUT; |
| } else if ("delete".equalsIgnoreCase(arg)) { |
| mVerb = CommandVerb.DELETE; |
| } else if ("list".equalsIgnoreCase(arg)) { |
| mVerb = CommandVerb.LIST; |
| } else if ("reset".equalsIgnoreCase(arg)) { |
| mVerb = CommandVerb.RESET; |
| } else { |
| // invalid |
| perr.println("Invalid command: " + arg); |
| return -1; |
| } |
| } else if (mTable == null) { |
| if (!"system".equalsIgnoreCase(arg) |
| && !"secure".equalsIgnoreCase(arg) |
| && !"global".equalsIgnoreCase(arg)) { |
| perr.println("Invalid namespace '" + arg + "'"); |
| return -1; |
| } |
| mTable = arg.toLowerCase(); |
| if (mVerb == CommandVerb.LIST) { |
| valid = true; |
| break; |
| } |
| } else if (mVerb == CommandVerb.RESET) { |
| if ("untrusted_defaults".equalsIgnoreCase(arg)) { |
| mResetMode = Settings.RESET_MODE_UNTRUSTED_DEFAULTS; |
| } else if ("untrusted_clear".equalsIgnoreCase(arg)) { |
| mResetMode = Settings.RESET_MODE_UNTRUSTED_CHANGES; |
| } else if ("trusted_defaults".equalsIgnoreCase(arg)) { |
| mResetMode = Settings.RESET_MODE_TRUSTED_DEFAULTS; |
| } else { |
| mPackageName = arg; |
| mResetMode = Settings.RESET_MODE_PACKAGE_DEFAULTS; |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| mTag = getNextArg(); |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| perr.println("Too many arguments"); |
| return -1; |
| } |
| } |
| break; |
| } |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| perr.println("Too many arguments"); |
| return -1; |
| } |
| } else if (mVerb == CommandVerb.GET || mVerb == CommandVerb.DELETE) { |
| mKey = arg; |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| perr.println("Too many arguments"); |
| return -1; |
| } |
| break; |
| } else if (mKey == null) { |
| mKey = arg; |
| // keep going; there's another PUT arg |
| } else if (mValue == null) { |
| mValue = arg; |
| // what we have so far is a valid command |
| valid = true; |
| // keep going; there may be another PUT arg |
| } else if (mTag == null) { |
| mTag = arg; |
| if ("default".equalsIgnoreCase(mTag)) { |
| mTag = null; |
| mMakeDefault = true; |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| perr.println("Too many arguments"); |
| return -1; |
| } |
| break; |
| } |
| if (peekNextArg() == null) { |
| valid = true; |
| break; |
| } |
| } else { // PUT, final arg |
| if (!"default".equalsIgnoreCase(arg)) { |
| perr.println("Argument expected to be 'default'"); |
| return -1; |
| } |
| mMakeDefault = true; |
| if (peekNextArg() == null) { |
| valid = true; |
| } else { |
| perr.println("Too many arguments"); |
| return -1; |
| } |
| break; |
| } |
| } while ((arg = getNextArg()) != null); |
| |
| if (!valid) { |
| perr.println("Bad arguments"); |
| return -1; |
| } |
| |
| if (mUser == UserHandle.USER_CURRENT) { |
| try { |
| mUser = ActivityManager.getService().getCurrentUser().id; |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| } |
| if (mUser < 0) { |
| mUser = UserHandle.USER_SYSTEM; |
| } else if (mVerb == CommandVerb.DELETE || mVerb == CommandVerb.LIST) { |
| perr.println("--user not supported for delete and list."); |
| return -1; |
| } |
| UserManager userManager = UserManager.get(mProvider.getContext()); |
| if (userManager.getUserInfo(mUser) == null) { |
| perr.println("Invalid user: " + mUser); |
| return -1; |
| } |
| |
| final IContentProvider iprovider = mProvider.getIContentProvider(); |
| final PrintWriter pout = getOutPrintWriter(); |
| switch (mVerb) { |
| case GET: |
| pout.println(getForUser(iprovider, mUser, mTable, mKey)); |
| break; |
| case PUT: |
| putForUser(iprovider, mUser, mTable, mKey, mValue, mTag, mMakeDefault); |
| break; |
| case DELETE: |
| pout.println("Deleted " |
| + deleteForUser(iprovider, mUser, mTable, mKey) + " rows"); |
| break; |
| case LIST: |
| for (String line : listForUser(iprovider, mUser, mTable)) { |
| pout.println(line); |
| } |
| break; |
| case RESET: |
| resetForUser(iprovider, mUser, mTable, mTag); |
| break; |
| default: |
| perr.println("Unspecified command"); |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| private List<String> listForUser(IContentProvider provider, int userHandle, String table) { |
| final Uri uri = "system".equals(table) ? Settings.System.CONTENT_URI |
| : "secure".equals(table) ? Settings.Secure.CONTENT_URI |
| : "global".equals(table) ? Settings.Global.CONTENT_URI |
| : null; |
| final ArrayList<String> lines = new ArrayList<String>(); |
| if (uri == null) { |
| return lines; |
| } |
| try { |
| final Cursor cursor = provider.query(resolveCallingPackage(), uri, null, null, |
| null); |
| try { |
| while (cursor != null && cursor.moveToNext()) { |
| lines.add(cursor.getString(1) + "=" + cursor.getString(2)); |
| } |
| } finally { |
| if (cursor != null) { |
| cursor.close(); |
| } |
| } |
| Collections.sort(lines); |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| return lines; |
| } |
| |
| String getForUser(IContentProvider provider, int userHandle, |
| final String table, final String key) { |
| final String callGetCommand; |
| if ("system".equals(table)) callGetCommand = Settings.CALL_METHOD_GET_SYSTEM; |
| else if ("secure".equals(table)) callGetCommand = Settings.CALL_METHOD_GET_SECURE; |
| else if ("global".equals(table)) callGetCommand = Settings.CALL_METHOD_GET_GLOBAL; |
| else { |
| getErrPrintWriter().println("Invalid table; no put performed"); |
| throw new IllegalArgumentException("Invalid table " + table); |
| } |
| |
| String result = null; |
| try { |
| Bundle arg = new Bundle(); |
| arg.putInt(Settings.CALL_METHOD_USER_KEY, userHandle); |
| Bundle b = provider.call(resolveCallingPackage(), callGetCommand, key, arg); |
| if (b != null) { |
| result = b.getPairValue(); |
| } |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| return result; |
| } |
| |
| void putForUser(IContentProvider provider, int userHandle, final String table, |
| final String key, final String value, String tag, boolean makeDefault) { |
| final String callPutCommand; |
| if ("system".equals(table)) { |
| callPutCommand = Settings.CALL_METHOD_PUT_SYSTEM; |
| if (makeDefault) { |
| getOutPrintWriter().print("Ignored makeDefault - " |
| + "doesn't apply to system settings"); |
| makeDefault = false; |
| } |
| } else if ("secure".equals(table)) callPutCommand = Settings.CALL_METHOD_PUT_SECURE; |
| else if ("global".equals(table)) callPutCommand = Settings.CALL_METHOD_PUT_GLOBAL; |
| else { |
| getErrPrintWriter().println("Invalid table; no put performed"); |
| return; |
| } |
| |
| try { |
| Bundle arg = new Bundle(); |
| arg.putString(Settings.NameValueTable.VALUE, value); |
| arg.putInt(Settings.CALL_METHOD_USER_KEY, userHandle); |
| if (tag != null) { |
| arg.putString(Settings.CALL_METHOD_TAG_KEY, tag); |
| } |
| if (makeDefault) { |
| arg.putBoolean(Settings.CALL_METHOD_MAKE_DEFAULT_KEY, true); |
| } |
| provider.call(resolveCallingPackage(), callPutCommand, key, arg); |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| } |
| |
| int deleteForUser(IContentProvider provider, int userHandle, |
| final String table, final String key) { |
| Uri targetUri; |
| if ("system".equals(table)) targetUri = Settings.System.getUriFor(key); |
| else if ("secure".equals(table)) targetUri = Settings.Secure.getUriFor(key); |
| else if ("global".equals(table)) targetUri = Settings.Global.getUriFor(key); |
| else { |
| getErrPrintWriter().println("Invalid table; no delete performed"); |
| throw new IllegalArgumentException("Invalid table " + table); |
| } |
| |
| int num = 0; |
| try { |
| num = provider.delete(resolveCallingPackage(), targetUri, null, null); |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| return num; |
| } |
| |
| void resetForUser(IContentProvider provider, int userHandle, |
| String table, String tag) { |
| final String callResetCommand; |
| if ("secure".equals(table)) callResetCommand = Settings.CALL_METHOD_RESET_SECURE; |
| else if ("global".equals(table)) callResetCommand = Settings.CALL_METHOD_RESET_GLOBAL; |
| else { |
| getErrPrintWriter().println("Invalid table; no reset performed"); |
| return; |
| } |
| |
| try { |
| Bundle arg = new Bundle(); |
| arg.putInt(Settings.CALL_METHOD_USER_KEY, userHandle); |
| arg.putInt(Settings.CALL_METHOD_RESET_MODE_KEY, mResetMode); |
| if (tag != null) { |
| arg.putString(Settings.CALL_METHOD_TAG_KEY, tag); |
| } |
| String packageName = mPackageName != null ? mPackageName : resolveCallingPackage(); |
| arg.putInt(Settings.CALL_METHOD_USER_KEY, userHandle); |
| provider.call(packageName, callResetCommand, null, arg); |
| } catch (RemoteException e) { |
| throw new RuntimeException("Failed in IPC", e); |
| } |
| } |
| |
| public static String resolveCallingPackage() { |
| switch (Binder.getCallingUid()) { |
| case Process.ROOT_UID: { |
| return "root"; |
| } |
| |
| case Process.SHELL_UID: { |
| return "com.android.shell"; |
| } |
| |
| default: { |
| return null; |
| } |
| } |
| } |
| |
| @Override |
| public void onHelp() { |
| PrintWriter pw = getOutPrintWriter(); |
| dumpHelp(pw, mDumping); |
| } |
| |
| static void dumpHelp(PrintWriter pw, boolean dumping) { |
| if (dumping) { |
| pw.println("Settings provider dump options:"); |
| pw.println(" [-h] [--proto]"); |
| pw.println(" -h: print this help."); |
| pw.println(" --proto: dump as protobuf."); |
| } else { |
| pw.println("Settings provider (settings) commands:"); |
| pw.println(" help"); |
| pw.println(" Print this help text."); |
| pw.println(" get [--user <USER_ID> | current] NAMESPACE KEY"); |
| pw.println(" Retrieve the current value of KEY."); |
| pw.println(" put [--user <USER_ID> | current] NAMESPACE KEY VALUE [TAG] [default]"); |
| pw.println(" Change the contents of KEY to VALUE."); |
| pw.println(" TAG to associate with the setting."); |
| pw.println(" {default} to set as the default, case-insensitive only for global/secure namespace"); |
| pw.println(" delete NAMESPACE KEY"); |
| pw.println(" Delete the entry for KEY."); |
| pw.println(" reset [--user <USER_ID> | current] NAMESPACE {PACKAGE_NAME | RESET_MODE}"); |
| pw.println(" Reset the global/secure table for a package with mode."); |
| pw.println(" RESET_MODE is one of {untrusted_defaults, untrusted_clear, trusted_defaults}, case-insensitive"); |
| pw.println(" list NAMESPACE"); |
| pw.println(" Print all defined keys."); |
| pw.println(" NAMESPACE is one of {system, secure, global}, case-insensitive"); |
| } |
| } |
| } |
| } |
| |