hmz007
36ed224bac
Signed-off-by: hmz007 <hmz007@gmail.com> Change-Id: Ib87fdbe7a0be7dc961af3500fe9ea4589a127f9f
37 lines
1.2 KiB
Rust
37 lines
1.2 KiB
Rust
// Copyright (C) 2021 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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//! Provides utilities for Android user ids.
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pub use cutils_bindgen::AID_KEYSTORE;
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pub use cutils_bindgen::AID_ROOT;
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pub use cutils_bindgen::AID_SHELL;
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pub use cutils_bindgen::AID_SYSTEM;
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pub use cutils_bindgen::AID_USER_OFFSET;
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/// Gets the user id from a uid.
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pub fn multiuser_get_user_id(uid: u32) -> u32 {
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uid / AID_USER_OFFSET
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}
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/// Gets the app id from a uid.
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pub fn multiuser_get_app_id(uid: u32) -> u32 {
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uid % AID_USER_OFFSET
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}
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/// Gets the uid from a user id and app id.
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pub fn multiuser_get_uid(user_id: u32, app_id: u32) -> u32 {
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(user_id * AID_USER_OFFSET) + (app_id % AID_USER_OFFSET)
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}
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