【笔记】android 系统常用user id列表

   android有些系统常用用户，例如root, system,  shell, wifi,radio的用户ID都是在代码里提前定义好了。例如system的uid是1000

include/private/android_filesystem_config.h

/* * Copyright (C) 2007 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. *//* This file is used to define the properties of the filesystem** images generated by build tools (mkbootfs and mkyaffs2image) and** by the device side of adb.*/#ifndef _ANDROID_FILESYSTEM_CONFIG_H_#define _ANDROID_FILESYSTEM_CONFIG_H_#include <sys/cdefs.h>#include <sys/types.h>#include <stdint.h>#if defined(__ANDROID__)#include <linux/capability.h>#else#include "android_filesystem_capability.h"#endif#define CAP_MASK_LONG(cap_name)  (1ULL << (cap_name))/* This is the master Users and Groups config for the platform. * DO NOT EVER RENUMBER */#define AID_ROOT             0  /* traditional unix root user */#define AID_SYSTEM        1000  /* system server */#define AID_RADIO         1001  /* telephony subsystem, RIL */#define AID_BLUETOOTH     1002  /* bluetooth subsystem */#define AID_GRAPHICS      1003  /* graphics devices */#define AID_INPUT         1004  /* input devices */#define AID_AUDIO         1005  /* audio devices */#define AID_CAMERA        1006  /* camera devices */#define AID_LOG           1007  /* log devices */#define AID_COMPASS       1008  /* compass device */#define AID_MOUNT         1009  /* mountd socket */#define AID_WIFI          1010  /* wifi subsystem */#define AID_ADB           1011  /* android debug bridge (adbd) */#define AID_INSTALL       1012  /* group for installing packages */#define AID_MEDIA         1013  /* mediaserver process */#define AID_DHCP          1014  /* dhcp client */#define AID_SDCARD_RW     1015  /* external storage write access */#define AID_VPN           1016  /* vpn system */#define AID_KEYSTORE      1017  /* keystore subsystem */#define AID_USB           1018  /* USB devices */#define AID_DRM           1019  /* DRM server */#define AID_MDNSR         1020  /* MulticastDNSResponder (service discovery) */#define AID_GPS           1021  /* GPS daemon */#define AID_UNUSED1       1022  /* deprecated, DO NOT USE */#define AID_MEDIA_RW      1023  /* internal media storage write access */#define AID_MTP           1024  /* MTP USB driver access */#define AID_UNUSED2       1025  /* deprecated, DO NOT USE */#define AID_DRMRPC        1026  /* group for drm rpc */#define AID_NFC           1027  /* nfc subsystem */#define AID_SDCARD_R      1028  /* external storage read access */#define AID_CLAT          1029  /* clat part of nat464 */#define AID_LOOP_RADIO    1030  /* loop radio devices */#define AID_MEDIA_DRM     1031  /* MediaDrm plugins */#define AID_PACKAGE_INFO  1032  /* access to installed package details */#define AID_SDCARD_PICS   1033  /* external storage photos access */#define AID_SDCARD_AV     1034  /* external storage audio/video access */#define AID_SDCARD_ALL    1035  /* access all users external storage */#define AID_LOGD          1036  /* log daemon */#define AID_SHARED_RELRO  1037  /* creator of shared GNU RELRO files */#define AID_DBUS          1038  /* dbus-daemon IPC broker process */#define AID_TLSDATE       1039  /* tlsdate unprivileged user */#define AID_MEDIA_EX      1040  /* mediaextractor process */#define AID_AUDIOSERVER   1041  /* audioserver process */#define AID_METRICS_COLL  1042  /* metrics_collector process */#define AID_METRICSD      1043  /* metricsd process */#define AID_WEBSERV       1044  /* webservd process */#define AID_DEBUGGERD     1045  /* debuggerd unprivileged user */#define AID_MEDIA_CODEC   1046  /* mediacodec process */#define AID_CAMERASERVER  1047  /* cameraserver process */#define AID_FIREWALL      1048  /* firewalld process */#define AID_TRUNKS        1049  /* trunksd process (TPM daemon) */#define AID_NVRAM         1050  /* Access-controlled NVRAM */#define AID_DNS           1051  /* DNS resolution daemon (system: netd) */#define AID_DNS_TETHER    1052  /* DNS resolution daemon (tether: dnsmasq) *//* Changes to this file must be made in AOSP, *not* in internal branches. */#define AID_SHELL         2000  /* adb and debug shell user */#define AID_CACHE         2001  /* cache access */#define AID_DIAG          2002  /* access to diagnostic resources *//* The range 2900-2999 is reserved for OEM, and must never be * used here */#define AID_OEM_RESERVED_START 2900#define AID_OEM_RESERVED_END   2999/* The 3000 series are intended for use as supplemental group id's only. * They indicate special Android capabilities that the kernel is aware of. */#define AID_NET_BT_ADMIN  3001  /* bluetooth: create any socket */#define AID_NET_BT        3002  /* bluetooth: create sco, rfcomm or l2cap sockets */#define AID_INET          3003  /* can create AF_INET and AF_INET6 sockets */#define AID_NET_RAW       3004  /* can create raw INET sockets */#define AID_NET_ADMIN     3005  /* can configure interfaces and routing tables. */#define AID_NET_BW_STATS  3006  /* read bandwidth statistics */#define AID_NET_BW_ACCT   3007  /* change bandwidth statistics accounting */#define AID_NET_BT_STACK  3008  /* bluetooth: access config files */#define AID_READPROC      3009  /* Allow /proc read access */#define AID_WAKELOCK      3010  /* Allow system wakelock read/write access *//* The range 5000-5999 is also reserved for OEM, and must never be used here. */#define AID_OEM_RESERVED_2_START 5000#define AID_OEM_RESERVED_2_END   5999#define AID_EVERYBODY     9997  /* shared between all apps in the same profile */#define AID_MISC          9998  /* access to misc storage */#define AID_NOBODY        9999#define AID_APP          10000  /* first app user */#define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */#define AID_ISOLATED_END   99999 /* end of uids for fully isolated sandboxed processes */#define AID_USER        100000  /* offset for uid ranges for each user */#define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */#define AID_SHARED_GID_END   59999 /* start of gids for apps in each user to share */#if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)/* * Used in: *  bionic/libc/bionic/stubs.cpp *  external/libselinux/src/android.c *  system/core/logd/LogStatistics.cpp *  system/core/init/ueventd.cpp *  system/core/init/util.cpp */struct android_id_info {    const char *name;    unsigned aid;};static const struct android_id_info android_ids[] = {    { "root",          AID_ROOT, },    { "system",        AID_SYSTEM, },    { "radio",         AID_RADIO, },    { "bluetooth",     AID_BLUETOOTH, },    { "graphics",      AID_GRAPHICS, },    { "input",         AID_INPUT, },    { "audio",         AID_AUDIO, },    { "camera",        AID_CAMERA, },    { "log",           AID_LOG, },    { "compass",       AID_COMPASS, },    { "mount",         AID_MOUNT, },    { "wifi",          AID_WIFI, },    { "adb",           AID_ADB, },    { "install",       AID_INSTALL, },    { "media",         AID_MEDIA, },    { "dhcp",          AID_DHCP, },    { "sdcard_rw",     AID_SDCARD_RW, },    { "vpn",           AID_VPN, },    { "keystore",      AID_KEYSTORE, },    { "usb",           AID_USB, },    { "drm",           AID_DRM, },    { "mdnsr",         AID_MDNSR, },    { "gps",           AID_GPS, },    // AID_UNUSED1    { "media_rw",      AID_MEDIA_RW, },    { "mtp",           AID_MTP, },    // AID_UNUSED2    { "drmrpc",        AID_DRMRPC, },    { "nfc",           AID_NFC, },    { "sdcard_r",      AID_SDCARD_R, },    { "clat",          AID_CLAT, },    { "loop_radio",    AID_LOOP_RADIO, },    { "mediadrm",      AID_MEDIA_DRM, },    { "package_info",  AID_PACKAGE_INFO, },    { "sdcard_pics",   AID_SDCARD_PICS, },    { "sdcard_av",     AID_SDCARD_AV, },    { "sdcard_all",    AID_SDCARD_ALL, },    { "logd",          AID_LOGD, },    { "shared_relro",  AID_SHARED_RELRO, },    { "dbus",          AID_DBUS, },    { "tlsdate",       AID_TLSDATE, },    { "mediaex",       AID_MEDIA_EX, },    { "audioserver",   AID_AUDIOSERVER, },    { "metrics_coll",  AID_METRICS_COLL },    { "metricsd",      AID_METRICSD },    { "webserv",       AID_WEBSERV },    { "debuggerd",     AID_DEBUGGERD, },    { "mediacodec",    AID_MEDIA_CODEC, },    { "cameraserver",  AID_CAMERASERVER, },    { "firewall",      AID_FIREWALL, },    { "trunks",        AID_TRUNKS, },    { "nvram",         AID_NVRAM, },    { "dns",           AID_DNS, },    { "dns_tether",    AID_DNS_TETHER, },    { "shell",         AID_SHELL, },    { "cache",         AID_CACHE, },    { "diag",          AID_DIAG, },    { "net_bt_admin",  AID_NET_BT_ADMIN, },    { "net_bt",        AID_NET_BT, },    { "inet",          AID_INET, },    { "net_raw",       AID_NET_RAW, },    { "net_admin",     AID_NET_ADMIN, },    { "net_bw_stats",  AID_NET_BW_STATS, },    { "net_bw_acct",   AID_NET_BW_ACCT, },    { "net_bt_stack",  AID_NET_BT_STACK, },    { "readproc",      AID_READPROC, },    { "wakelock",      AID_WAKELOCK, },    { "everybody",     AID_EVERYBODY, },    { "misc",          AID_MISC, },    { "nobody",        AID_NOBODY, },};#define android_id_count \    (sizeof(android_ids) / sizeof(android_ids[0]))struct fs_path_config {    unsigned mode;    unsigned uid;    unsigned gid;    uint64_t capabilities;    const char *prefix;};/* Rules for directories and files has moved to system/code/libcutils/fs_config.c */__BEGIN_DECLS/* * Used in: *  build/tools/fs_config/fs_config.c *  build/tools/fs_get_stats/fs_get_stats.c *  system/extras/ext4_utils/make_ext4fs_main.c *  external/squashfs-tools/squashfs-tools/android.c *  system/core/cpio/mkbootfs.c *  system/core/adb/file_sync_service.cpp *  system/extras/ext4_utils/canned_fs_config.c */void fs_config(const char *path, int dir, const char *target_out_path,               unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities);ssize_t fs_config_generate(char *buffer, size_t length, const struct fs_path_config *pc);__END_DECLS#endif#endif