bd2ecd8e6d
We can't reuse the GID range for internal cache files, otherwise we don't have a way to tease apart the difference when deciding if it's safe to move apps. Test: builds, boots Bug: 37193650 Change-Id: I22c4e575cd557636e74c5c73035adb1d4dcbb7f7
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <cutils/multiuser.h>
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#include <private/android_filesystem_config.h>
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userid_t multiuser_get_user_id(uid_t uid) {
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return uid / AID_USER_OFFSET;
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}
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appid_t multiuser_get_app_id(uid_t uid) {
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return uid % AID_USER_OFFSET;
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}
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uid_t multiuser_get_uid(userid_t user_id, appid_t app_id) {
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return (user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET);
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}
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gid_t multiuser_get_cache_gid(userid_t user_id, appid_t app_id) {
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if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
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return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_CACHE_GID_START);
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} else {
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return -1;
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}
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}
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gid_t multiuser_get_ext_gid(userid_t user_id, appid_t app_id) {
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if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
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return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_GID_START);
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} else {
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return -1;
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}
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}
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gid_t multiuser_get_ext_cache_gid(userid_t user_id, appid_t app_id) {
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if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
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return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_CACHE_GID_START);
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} else {
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return -1;
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}
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}
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gid_t multiuser_get_shared_gid(userid_t user_id, appid_t app_id) {
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if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
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return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_SHARED_GID_START);
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} else {
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return -1;
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}
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}
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gid_t multiuser_get_shared_app_gid(uid_t uid) {
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return multiuser_get_shared_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
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}
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