Amith Yamasani | 4b2e934 | 2011-03-31 12:38:53 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2011 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.server.pm; |
| 18 | |
| 19 | import com.android.internal.util.FastXmlSerializer; |
| 20 | |
| 21 | import android.content.pm.UserInfo; |
| 22 | import android.os.Environment; |
| 23 | import android.os.FileUtils; |
| 24 | import android.util.Slog; |
| 25 | import android.util.SparseArray; |
| 26 | import android.util.Xml; |
| 27 | |
| 28 | import java.io.BufferedOutputStream; |
| 29 | import java.io.File; |
| 30 | import java.io.FileInputStream; |
| 31 | import java.io.FileOutputStream; |
| 32 | import java.io.IOException; |
| 33 | import java.util.ArrayList; |
| 34 | import java.util.List; |
| 35 | |
| 36 | import org.xmlpull.v1.XmlPullParser; |
| 37 | import org.xmlpull.v1.XmlPullParserException; |
| 38 | import org.xmlpull.v1.XmlSerializer; |
| 39 | |
| 40 | public class UserDetails { |
| 41 | private static final String TAG_NAME = "name"; |
| 42 | |
| 43 | private static final String ATTR_FLAGS = "flags"; |
| 44 | |
| 45 | private static final String ATTR_ID = "id"; |
| 46 | |
| 47 | private static final String TAG_USERS = "users"; |
| 48 | |
| 49 | private static final String TAG_USER = "user"; |
| 50 | |
| 51 | private static final String TAG = "UserDetails"; |
| 52 | |
| 53 | private static final String USER_INFO_DIR = "system/users"; |
| 54 | private static final String USER_LIST_FILENAME = "userlist.xml"; |
| 55 | |
| 56 | private SparseArray<UserInfo> mUsers; |
| 57 | |
| 58 | private final File mUsersDir; |
| 59 | private final File mUserListFile; |
| 60 | |
| 61 | /** |
| 62 | * Available for testing purposes. |
| 63 | */ |
| 64 | UserDetails(File dataDir) { |
| 65 | mUsersDir = new File(dataDir, USER_INFO_DIR); |
| 66 | mUsersDir.mkdirs(); |
| 67 | FileUtils.setPermissions(mUsersDir.toString(), |
| 68 | FileUtils.S_IRWXU|FileUtils.S_IRWXG |
| 69 | |FileUtils.S_IROTH|FileUtils.S_IXOTH, |
| 70 | -1, -1); |
| 71 | mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); |
| 72 | readUserList(); |
| 73 | } |
| 74 | |
| 75 | public UserDetails() { |
| 76 | this(Environment.getDataDirectory()); |
| 77 | } |
| 78 | |
| 79 | public List<UserInfo> getUsers() { |
| 80 | ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); |
| 81 | for (int i = 0; i < mUsers.size(); i++) { |
| 82 | users.add(mUsers.valueAt(i)); |
| 83 | } |
| 84 | return users; |
| 85 | } |
| 86 | |
| 87 | private void readUserList() { |
| 88 | mUsers = new SparseArray<UserInfo>(); |
| 89 | if (!mUserListFile.exists()) { |
| 90 | fallbackToSingleUser(); |
| 91 | return; |
| 92 | } |
| 93 | FileInputStream fis = null; |
| 94 | try { |
| 95 | fis = new FileInputStream(mUserListFile); |
| 96 | XmlPullParser parser = Xml.newPullParser(); |
| 97 | parser.setInput(fis, null); |
| 98 | int type; |
| 99 | while ((type = parser.next()) != XmlPullParser.START_TAG |
| 100 | && type != XmlPullParser.END_DOCUMENT) { |
| 101 | ; |
| 102 | } |
| 103 | |
| 104 | if (type != XmlPullParser.START_TAG) { |
| 105 | Slog.e(TAG, "Unable to read user list"); |
| 106 | fallbackToSingleUser(); |
| 107 | return; |
| 108 | } |
| 109 | |
| 110 | while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { |
| 111 | if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { |
| 112 | String id = parser.getAttributeValue(null, ATTR_ID); |
| 113 | UserInfo user = readUser(Integer.parseInt(id)); |
| 114 | if (user != null) { |
| 115 | mUsers.put(user.id, user); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } catch (IOException ioe) { |
| 120 | fallbackToSingleUser(); |
| 121 | } catch (XmlPullParserException pe) { |
| 122 | fallbackToSingleUser(); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | private void fallbackToSingleUser() { |
| 127 | // Create the primary user |
| 128 | UserInfo primary = new UserInfo(0, "Primary", |
| 129 | UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY); |
| 130 | mUsers.put(0, primary); |
| 131 | |
| 132 | writeUserList(); |
| 133 | writeUser(primary); |
| 134 | } |
| 135 | |
| 136 | /* |
| 137 | * Writes the user file in this format: |
| 138 | * |
| 139 | * <user flags="20039023" id="0"> |
| 140 | * <name>Primary</name> |
| 141 | * </user> |
| 142 | */ |
| 143 | private void writeUser(UserInfo userInfo) { |
| 144 | try { |
| 145 | final File mUserFile = new File(mUsersDir, userInfo.id + ".xml"); |
| 146 | final FileOutputStream fos = new FileOutputStream(mUserFile); |
| 147 | final BufferedOutputStream bos = new BufferedOutputStream(fos); |
| 148 | |
| 149 | // XmlSerializer serializer = XmlUtils.serializerInstance(); |
| 150 | final XmlSerializer serializer = new FastXmlSerializer(); |
| 151 | serializer.setOutput(bos, "utf-8"); |
| 152 | serializer.startDocument(null, true); |
| 153 | serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 154 | |
| 155 | serializer.startTag(null, TAG_USER); |
| 156 | serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); |
| 157 | serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); |
| 158 | |
| 159 | serializer.startTag(null, TAG_NAME); |
| 160 | serializer.text(userInfo.name); |
| 161 | serializer.endTag(null, TAG_NAME); |
| 162 | |
| 163 | serializer.endTag(null, TAG_USER); |
| 164 | |
| 165 | serializer.endDocument(); |
| 166 | } catch (IOException ioe) { |
| 167 | Slog.e(TAG, "Error writing user info " + userInfo.id + "\n" + ioe); |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Writes the user list file in this format: |
| 173 | * |
| 174 | * <users> |
| 175 | * <user id="0"></user> |
| 176 | * <user id="2"></user> |
| 177 | * </users> |
| 178 | */ |
| 179 | private void writeUserList() { |
| 180 | try { |
| 181 | final FileOutputStream fos = new FileOutputStream(mUserListFile); |
| 182 | final BufferedOutputStream bos = new BufferedOutputStream(fos); |
| 183 | |
| 184 | // XmlSerializer serializer = XmlUtils.serializerInstance(); |
| 185 | final XmlSerializer serializer = new FastXmlSerializer(); |
| 186 | serializer.setOutput(bos, "utf-8"); |
| 187 | serializer.startDocument(null, true); |
| 188 | serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| 189 | |
| 190 | serializer.startTag(null, TAG_USERS); |
| 191 | |
| 192 | for (int i = 0; i < mUsers.size(); i++) { |
| 193 | UserInfo user = mUsers.valueAt(i); |
| 194 | serializer.startTag(null, TAG_USER); |
| 195 | serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); |
| 196 | serializer.endTag(null, TAG_USER); |
| 197 | Slog.e(TAG, "Wrote user " + user.id + " to userlist.xml"); |
| 198 | } |
| 199 | |
| 200 | serializer.endTag(null, TAG_USERS); |
| 201 | |
| 202 | serializer.endDocument(); |
| 203 | } catch (IOException ioe) { |
| 204 | Slog.e(TAG, "Error writing user list"); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | private UserInfo readUser(int id) { |
| 209 | int flags = 0; |
| 210 | String name = null; |
| 211 | |
| 212 | FileInputStream fis = null; |
| 213 | try { |
| 214 | File userFile = new File(mUsersDir, Integer.toString(id) + ".xml"); |
| 215 | fis = new FileInputStream(userFile); |
| 216 | XmlPullParser parser = Xml.newPullParser(); |
| 217 | parser.setInput(fis, null); |
| 218 | int type; |
| 219 | while ((type = parser.next()) != XmlPullParser.START_TAG |
| 220 | && type != XmlPullParser.END_DOCUMENT) { |
| 221 | ; |
| 222 | } |
| 223 | |
| 224 | if (type != XmlPullParser.START_TAG) { |
| 225 | Slog.e(TAG, "Unable to read user " + id); |
| 226 | return null; |
| 227 | } |
| 228 | |
| 229 | if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { |
| 230 | String storedId = parser.getAttributeValue(null, ATTR_ID); |
| 231 | if (Integer.parseInt(storedId) != id) { |
| 232 | Slog.e(TAG, "User id does not match the file name"); |
| 233 | return null; |
| 234 | } |
| 235 | String flagString = parser.getAttributeValue(null, ATTR_FLAGS); |
| 236 | flags = Integer.parseInt(flagString); |
| 237 | |
| 238 | while ((type = parser.next()) != XmlPullParser.START_TAG |
| 239 | && type != XmlPullParser.END_DOCUMENT) { |
| 240 | } |
| 241 | if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_NAME)) { |
| 242 | type = parser.next(); |
| 243 | if (type == XmlPullParser.TEXT) { |
| 244 | name = parser.getText(); |
| 245 | } |
| 246 | } |
| 247 | } |
| 248 | fis.close(); |
| 249 | |
| 250 | UserInfo userInfo = new UserInfo(id, name, flags); |
| 251 | return userInfo; |
| 252 | |
| 253 | } catch (IOException ioe) { |
| 254 | } catch (XmlPullParserException pe) { |
| 255 | } |
| 256 | return null; |
| 257 | } |
| 258 | |
| 259 | public UserInfo createUser(String name, int flags) { |
| 260 | int id = getNextAvailableId(); |
| 261 | UserInfo userInfo = new UserInfo(id, name, flags); |
| 262 | if (!createPackageFolders(id)) { |
| 263 | return null; |
| 264 | } |
| 265 | mUsers.put(id, userInfo); |
| 266 | writeUserList(); |
| 267 | writeUser(userInfo); |
| 268 | return userInfo; |
| 269 | } |
| 270 | |
| 271 | public void removeUser(int id) { |
| 272 | // Remove from the list |
| 273 | UserInfo userInfo = mUsers.get(id); |
| 274 | if (userInfo != null) { |
| 275 | // Remove this user from the list |
| 276 | mUsers.remove(id); |
| 277 | // Remove user file |
| 278 | File userFile = new File(mUsersDir, id + ".xml"); |
| 279 | userFile.delete(); |
| 280 | writeUserList(); |
| 281 | removePackageFolders(id); |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | private int getNextAvailableId() { |
| 286 | int i = 0; |
| 287 | while (i < Integer.MAX_VALUE) { |
| 288 | if (mUsers.indexOfKey(i) < 0) { |
| 289 | break; |
| 290 | } |
| 291 | i++; |
| 292 | } |
| 293 | return i; |
| 294 | } |
| 295 | |
| 296 | private boolean createPackageFolders(int id) { |
| 297 | // TODO: Create data directories for all the packages for a new user, w/ specified user id. |
| 298 | return true; |
| 299 | } |
| 300 | |
| 301 | private boolean removePackageFolders(int id) { |
| 302 | // TODO: Remove all the data directories for the specified user. |
| 303 | return true; |
| 304 | } |
| 305 | } |