New command line tool: "settings" (af75948c) · Commits · e / os / android_frameworks_base

cmds/settings/Android.mk

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		# Copyright 2011 The Android Open Source Project
		#
		LOCAL_PATH:= $(call my-dir)
		include $(CLEAR_VARS)

		LOCAL_SRC_FILES := $(call all-subdir-java-files)
		LOCAL_MODULE := settings
		LOCAL_MODULE_TAGS := optional
		include $(BUILD_JAVA_LIBRARY)

		include $(CLEAR_VARS)
		LOCAL_MODULE := settings
		LOCAL_SRC_FILES := settings
		LOCAL_MODULE_CLASS := EXECUTABLES
		LOCAL_MODULE_TAGS := optional
		include $(BUILD_PREBUILT)

cmds/settings/settings

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		# Script to start "settings" on the device
		#
		base=/system
		export CLASSPATH=$base/framework/settings.jar
		exec app_process $base/bin com.android.commands.settings.SettingsCmd "$@"

cmds/settings/src/com/android/commands/settings/SettingsCmd.java

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		/*
		* Copyright (C) 2012 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.commands.settings;

		import android.app.ActivityManagerNative;
		import android.app.IActivityManager;
		import android.app.IActivityManager.ContentProviderHolder;
		import android.content.IContentProvider;
		import android.os.Binder;
		import android.os.Bundle;
		import android.os.IBinder;
		import android.os.RemoteException;
		import android.os.UserHandle;
		import android.provider.Settings;

		public final class SettingsCmd {
		static final String TAG = "settings";

		enum CommandVerb {
		UNSPECIFIED,
		GET,
		PUT
		}

		static String[] mArgs;
		int mNextArg;
		int mUser = -1; // unspecified
		CommandVerb mVerb = CommandVerb.UNSPECIFIED;
		String mTable = null;
		String mKey = null;
		String mValue = null;

		public static void main(String[] args) {
		if (args == null \|\| args.length < 3) {
		printUsage();
		return;
		}

		mArgs = args;
		try {
		new SettingsCmd().run();
		} catch (Exception e) {
		System.err.println("Unable to run settings command");
		}
		}

		public void run() {
		boolean valid = false;
		String arg;
		try {
		while ((arg = nextArg()) != null) {
		if ("--user".equals(arg)) {
		if (mUser != -1) {
		// --user specified more than once; invalid
		break;
		}
		mUser = Integer.parseInt(nextArg());
		} else if (mVerb == CommandVerb.UNSPECIFIED) {
		if ("get".equalsIgnoreCase(arg)) {
		mVerb = CommandVerb.GET;
		} else if ("put".equalsIgnoreCase(arg)) {
		mVerb = CommandVerb.PUT;
		} else {
		// invalid
		System.err.println("Invalid command: " + arg);
		break;
		}
		} else if (mTable == null) {
		if (!"system".equalsIgnoreCase(arg)
		&& !"secure".equalsIgnoreCase(arg)
		&& !"global".equalsIgnoreCase(arg)) {
		System.err.println("Invalid namespace '" + arg + "'");
		break; // invalid
		}
		mTable = arg.toLowerCase();
		} else if (mVerb == CommandVerb.GET) {
		mKey = arg;
		if (mNextArg >= mArgs.length) {
		valid = true;
		} else {
		System.err.println("Too many arguments");
		}
		break;
		} else if (mKey == null) {
		mKey = arg;
		// keep going; there's another PUT arg
		} else { // PUT, final arg
		mValue = arg;
		if (mNextArg >= mArgs.length) {
		valid = true;
		} else {
		System.err.println("Too many arguments");
		}
		break;
		}
		}
		} catch (Exception e) {
		valid = false;
		}

		if (valid) {
		if (mUser < 0) {
		mUser = UserHandle.USER_OWNER;
		}

		try {
		IActivityManager activityManager = ActivityManagerNative.getDefault();
		IContentProvider provider = null;
		IBinder token = new Binder();
		try {
		ContentProviderHolder holder = activityManager.getContentProviderExternal(
		"settings", UserHandle.USER_OWNER, token);
		if (holder == null) {
		throw new IllegalStateException("Could not find settings provider");
		}
		provider = holder.provider;

		switch (mVerb) {
		case GET:
		System.out.println(getForUser(provider, mUser, mTable, mKey));
		break;
		case PUT:
		putForUser(provider, mUser, mTable, mKey, mValue);
		break;
		default:
		System.err.println("Unspecified command");
		break;
		}

		} finally {
		if (provider != null) {
		activityManager.removeContentProviderExternal("settings", token);
		}
		}
		} catch (Exception e) {
		System.err.println("Error while accessing settings provider");
		e.printStackTrace();
		}

		} else {
		printUsage();
		}
		}

		private String nextArg() {
		if (mNextArg >= mArgs.length) {
		return null;
		}
		String arg = mArgs[mNextArg];
		mNextArg++;
		return arg;
		}

		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 {
		System.err.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(callGetCommand, key, arg);
		if (b != null) {
		result = b.getPairValue();
		}
		} catch (RemoteException e) {
		System.err.println("Can't read key " + key + " in " + table + " for user " + userHandle);
		}
		return result;
		}

		void putForUser(IContentProvider provider, int userHandle,
		final String table, final String key, final String value) {
		final String callPutCommand;
		if ("system".equals(table)) callPutCommand = Settings.CALL_METHOD_PUT_SYSTEM;
		else if ("secure".equals(table)) callPutCommand = Settings.CALL_METHOD_PUT_SECURE;
		else if ("global".equals(table)) callPutCommand = Settings.CALL_METHOD_PUT_GLOBAL;
		else {
		System.err.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);
		provider.call(callPutCommand, key, arg);
		} catch (RemoteException e) {
		System.err.println("Can't set key " + key + " in " + table + " for user " + userHandle);
		}
		}

		private static void printUsage() {
		System.err.println("usage: settings [--user NUM] get namespace key");
		System.err.println(" settings [--user NUM] put namespace key value");
		System.err.println("\n'namespace' is one of {system, secure, global}, case-insensitive");
		System.err.println("If '--user NUM' is not given, the operations are performed on the owner user.");
		}
		}