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68 lines
2.2 KiB
68 lines
2.2 KiB
/* |
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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, appid_t app_id) { |
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if (app_id >= AID_APP_START && app_id <= AID_APP_END) { |
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return (app_id - AID_APP_START) + AID_SHARED_GID_START; |
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} else if (app_id >= AID_ROOT && app_id <= AID_APP_START) { |
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return app_id; |
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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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