1 // Copyright 2023 The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //! User and group IDs within Microdroid 16 17 /// Always the user ID of Root. 18 pub const ROOT_UID: u32 = 0; 19 20 // Android reserves UID/GIDs 6000-6499 for use by the system partition - 21 // see AID_SYSTEM_RESERVED_START. 22 // Within Microdroid we own the system partition, so they are free for our 23 // use. The Microdroid system image includes /system/ext/passwd and 24 // /system/ext/group files that allocate names to the IDs that we are 25 // using, so that tools like `ps` handle them correctly - see build targets 26 // microdroid_etc_passwd and microdroid_etc_group. 27 // (Our UIDs are entirely separate from Android's, but we use the same 28 // Bionic, and it uses the Android definitions - so using a reserved range 29 // helps avoid confusion.) 30 31 /// Group ID shared by all payload users. 32 pub const MICRODROID_PAYLOAD_GID: u32 = if cfg!(multi_tenant) { 6000 } else { 0 }; 33 34 /// User ID for the initial payload user. 35 pub const MICRODROID_PAYLOAD_UID: u32 = if cfg!(multi_tenant) { 6000 } else { 0 }; 36