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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.
*/
#include <cutils/multiuser.h>
#include <private/android_filesystem_config.h>
userid_t multiuser_get_user_id(uid_t uid) {
return uid / AID_USER_OFFSET;
}
appid_t multiuser_get_app_id(uid_t uid) {
return uid % AID_USER_OFFSET;
}
uid_t multiuser_get_uid(userid_t user_id, appid_t app_id) {
return (user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET);
}
uid_t multiuser_get_sdk_sandbox_uid(userid_t user_id, appid_t app_id) {
int sdk_sandbox_offset = AID_SDK_SANDBOX_PROCESS_START - AID_APP_START;
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return (user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET) + sdk_sandbox_offset;
} else {
return -1;
}
}
uid_t multiuser_convert_sdk_sandbox_to_app_uid(uid_t uid) {
appid_t app_id = multiuser_get_app_id(uid);
int sdk_sandbox_offset = AID_SDK_SANDBOX_PROCESS_START - AID_APP_START;
if (app_id >= AID_SDK_SANDBOX_PROCESS_START && app_id <= AID_SDK_SANDBOX_PROCESS_END) {
return uid - sdk_sandbox_offset;
} else {
return -1;
}
}
gid_t multiuser_get_cache_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_CACHE_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_ext_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_ext_cache_gid(userid_t user_id, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return multiuser_get_uid(user_id, (app_id - AID_APP_START) + AID_EXT_CACHE_GID_START);
} else {
return -1;
}
}
gid_t multiuser_get_shared_gid(userid_t, appid_t app_id) {
if (app_id >= AID_APP_START && app_id <= AID_APP_END) {
return (app_id - AID_APP_START) + AID_SHARED_GID_START;
} else if (app_id >= AID_ROOT && app_id <= AID_APP_START) {
return app_id;
} else {
return -1;
}
}
gid_t multiuser_get_shared_app_gid(uid_t uid) {
return multiuser_get_shared_gid(multiuser_get_user_id(uid), multiuser_get_app_id(uid));
}
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