multiuser.c revision 9509d27252b16f69b6fd2ebb2c552201c34e5c0c
1/* 2 * Copyright (C) 2012 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#include <stdlib.h> 18#include <unistd.h> 19#include <fcntl.h> 20#include <cutils/multiuser.h> 21 22userid_t getUserId(uid_t uid) { 23 return uid / MULTIUSER_APP_PER_USER_RANGE; 24} 25 26appid_t getAppId(uid_t uid) { 27 return uid % MULTIUSER_APP_PER_USER_RANGE; 28} 29 30uid_t getUid(userid_t userId, appid_t appId) { 31 return userId * MULTIUSER_APP_PER_USER_RANGE + (appId % MULTIUSER_APP_PER_USER_RANGE); 32} 33