307 lines
12 KiB
C
307 lines
12 KiB
C
/*
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* Copyright (C) 2007 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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/* This file is used to define the properties of the filesystem
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** images generated by build tools (mkbootfs and mkyaffs2image) and
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** by the device side of adb.
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*/
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#ifndef _ANDROID_FILESYSTEM_CONFIG_H_
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#define _ANDROID_FILESYSTEM_CONFIG_H_
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <stdint.h>
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#ifdef HAVE_ANDROID_OS
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#include <linux/capability.h>
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#else
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#include "android_filesystem_capability.h"
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#endif
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/* This is the master Users and Groups config for the platform.
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* DO NOT EVER RENUMBER
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*/
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#define AID_ROOT 0 /* traditional unix root user */
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#define AID_SYSTEM 1000 /* system server */
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#define AID_RADIO 1001 /* telephony subsystem, RIL */
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#define AID_BLUETOOTH 1002 /* bluetooth subsystem */
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#define AID_GRAPHICS 1003 /* graphics devices */
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#define AID_INPUT 1004 /* input devices */
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#define AID_AUDIO 1005 /* audio devices */
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#define AID_CAMERA 1006 /* camera devices */
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#define AID_LOG 1007 /* log devices */
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#define AID_COMPASS 1008 /* compass device */
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#define AID_MOUNT 1009 /* mountd socket */
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#define AID_WIFI 1010 /* wifi subsystem */
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#define AID_ADB 1011 /* android debug bridge (adbd) */
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#define AID_INSTALL 1012 /* group for installing packages */
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#define AID_MEDIA 1013 /* mediaserver process */
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#define AID_DHCP 1014 /* dhcp client */
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#define AID_SDCARD_RW 1015 /* external storage write access */
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#define AID_VPN 1016 /* vpn system */
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#define AID_KEYSTORE 1017 /* keystore subsystem */
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#define AID_USB 1018 /* USB devices */
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#define AID_DRM 1019 /* DRM server */
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#define AID_MDNSR 1020 /* MulticastDNSResponder (service discovery) */
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#define AID_GPS 1021 /* GPS daemon */
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#define AID_UNUSED1 1022 /* deprecated, DO NOT USE */
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#define AID_MEDIA_RW 1023 /* internal media storage write access */
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#define AID_MTP 1024 /* MTP USB driver access */
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#define AID_UNUSED2 1025 /* deprecated, DO NOT USE */
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#define AID_DRMRPC 1026 /* group for drm rpc */
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#define AID_NFC 1027 /* nfc subsystem */
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#define AID_SDCARD_R 1028 /* external storage read access */
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#define AID_CLAT 1029 /* clat part of nat464 */
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#define AID_LOOP_RADIO 1030 /* loop radio devices */
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#define AID_MEDIA_DRM 1031 /* MediaDrm plugins */
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#define AID_PACKAGE_INFO 1032 /* access to installed package details */
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#define AID_SDCARD_PICS 1033 /* external storage photos access */
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#define AID_SDCARD_AV 1034 /* external storage audio/video access */
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#define AID_SDCARD_ALL 1035 /* access all users external storage */
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#define AID_LOGD 1036 /* log daemon */
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#define AID_SHARED_RELRO 1037 /* creator of shared GNU RELRO files */
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#define AID_SHELL 2000 /* adb and debug shell user */
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#define AID_CACHE 2001 /* cache access */
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#define AID_DIAG 2002 /* access to diagnostic resources */
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/* The range 2900-2999 is reserved for OEM, and must never be
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* used here */
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#define AID_OEM_RESERVED_START 2900
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#define AID_OEM_RESERVED_END 2999
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/* The 3000 series are intended for use as supplemental group id's only.
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* They indicate special Android capabilities that the kernel is aware of. */
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#define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */
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#define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */
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#define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */
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#define AID_NET_RAW 3004 /* can create raw INET sockets */
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#define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */
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#define AID_NET_BW_STATS 3006 /* read bandwidth statistics */
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#define AID_NET_BW_ACCT 3007 /* change bandwidth statistics accounting */
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#define AID_NET_BT_STACK 3008 /* bluetooth: access config files */
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#define AID_EVERYBODY 9997 /* shared between all apps in the same profile */
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#define AID_MISC 9998 /* access to misc storage */
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#define AID_NOBODY 9999
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#define AID_APP 10000 /* first app user */
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#define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */
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#define AID_ISOLATED_END 99999 /* end of uids for fully isolated sandboxed processes */
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#define AID_USER 100000 /* offset for uid ranges for each user */
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#define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */
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#define AID_SHARED_GID_END 59999 /* start of gids for apps in each user to share */
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#if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)
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struct android_id_info {
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const char *name;
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unsigned aid;
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};
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static const struct android_id_info android_ids[] = {
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{ "root", AID_ROOT, },
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{ "system", AID_SYSTEM, },
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{ "radio", AID_RADIO, },
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{ "bluetooth", AID_BLUETOOTH, },
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{ "graphics", AID_GRAPHICS, },
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{ "input", AID_INPUT, },
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{ "audio", AID_AUDIO, },
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{ "camera", AID_CAMERA, },
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{ "log", AID_LOG, },
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{ "compass", AID_COMPASS, },
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{ "mount", AID_MOUNT, },
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{ "wifi", AID_WIFI, },
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{ "adb", AID_ADB, },
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{ "install", AID_INSTALL, },
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{ "media", AID_MEDIA, },
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{ "dhcp", AID_DHCP, },
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{ "sdcard_rw", AID_SDCARD_RW, },
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{ "vpn", AID_VPN, },
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{ "keystore", AID_KEYSTORE, },
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{ "usb", AID_USB, },
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{ "drm", AID_DRM, },
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{ "mdnsr", AID_MDNSR, },
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{ "gps", AID_GPS, },
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// AID_UNUSED1
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{ "media_rw", AID_MEDIA_RW, },
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{ "mtp", AID_MTP, },
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// AID_UNUSED2
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{ "drmrpc", AID_DRMRPC, },
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{ "nfc", AID_NFC, },
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{ "sdcard_r", AID_SDCARD_R, },
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{ "clat", AID_CLAT, },
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{ "loop_radio", AID_LOOP_RADIO, },
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{ "mediadrm", AID_MEDIA_DRM, },
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{ "package_info", AID_PACKAGE_INFO, },
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{ "sdcard_pics", AID_SDCARD_PICS, },
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{ "sdcard_av", AID_SDCARD_AV, },
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{ "sdcard_all", AID_SDCARD_ALL, },
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{ "logd", AID_LOGD, },
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{ "shared_relro", AID_SHARED_RELRO, },
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{ "shell", AID_SHELL, },
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{ "cache", AID_CACHE, },
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{ "diag", AID_DIAG, },
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{ "net_bt_admin", AID_NET_BT_ADMIN, },
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{ "net_bt", AID_NET_BT, },
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{ "inet", AID_INET, },
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{ "net_raw", AID_NET_RAW, },
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{ "net_admin", AID_NET_ADMIN, },
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{ "net_bw_stats", AID_NET_BW_STATS, },
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{ "net_bw_acct", AID_NET_BW_ACCT, },
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{ "net_bt_stack", AID_NET_BT_STACK, },
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{ "everybody", AID_EVERYBODY, },
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{ "misc", AID_MISC, },
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{ "nobody", AID_NOBODY, },
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};
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#define android_id_count \
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(sizeof(android_ids) / sizeof(android_ids[0]))
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struct fs_path_config {
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unsigned mode;
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unsigned uid;
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unsigned gid;
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uint64_t capabilities;
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const char *prefix;
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};
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/* Rules for directories.
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** These rules are applied based on "first match", so they
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** should start with the most specific path and work their
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** way up to the root.
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*/
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static const struct fs_path_config android_dirs[] = {
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{ 00770, AID_SYSTEM, AID_CACHE, 0, "cache" },
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{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" },
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{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" },
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{ 00771, AID_ROOT, AID_ROOT, 0, "data/dalvik-cache" },
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{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" },
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{ 00771, AID_SHELL, AID_SHELL, 0, "data/local/tmp" },
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{ 00771, AID_SHELL, AID_SHELL, 0, "data/local" },
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{ 01771, AID_SYSTEM, AID_MISC, 0, "data/misc" },
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{ 00770, AID_DHCP, AID_DHCP, 0, "data/misc/dhcp" },
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{ 00771, AID_SHARED_RELRO, AID_SHARED_RELRO, 0, "data/misc/shared_relro" },
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{ 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" },
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{ 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" },
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{ 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" },
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{ 00750, AID_ROOT, AID_SHELL, 0, "sbin" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/vendor" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/xbin" },
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{ 00755, AID_ROOT, AID_ROOT, 0, "system/etc/ppp" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "vendor" },
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{ 00777, AID_ROOT, AID_ROOT, 0, "sdcard" },
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{ 00755, AID_ROOT, AID_ROOT, 0, 0 },
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};
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/* Rules for files.
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** These rules are applied based on "first match", so they
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** should start with the most specific path and work their
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** way up to the root. Prefixes ending in * denotes wildcard
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** and will allow partial matches.
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*/
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static const struct fs_path_config android_files[] = {
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{ 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.rc" },
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{ 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.sh" },
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{ 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.ril" },
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{ 00550, AID_DHCP, AID_SHELL, 0, "system/etc/dhcpcd/dhcpcd-run-hooks" },
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{ 00555, AID_ROOT, AID_ROOT, 0, "system/etc/ppp/*" },
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{ 00555, AID_ROOT, AID_ROOT, 0, "system/etc/rc.*" },
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{ 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app/*" },
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{ 00644, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/*" },
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{ 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private/*" },
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{ 00644, AID_APP, AID_APP, 0, "data/data/*" },
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/* the following five files are INTENTIONALLY set-uid, but they
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* are NOT included on user builds. */
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{ 04750, AID_ROOT, AID_SHELL, 0, "system/xbin/su" },
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{ 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/librank" },
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{ 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procrank" },
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{ 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procmem" },
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{ 04770, AID_ROOT, AID_RADIO, 0, "system/bin/pppd-ril" },
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/* the following files have enhanced capabilities and ARE included in user builds. */
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{ 00750, AID_ROOT, AID_SHELL, (1 << CAP_SETUID) | (1 << CAP_SETGID), "system/bin/run-as" },
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{ 00750, AID_ROOT, AID_ROOT, 0, "system/bin/uncrypt" },
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{ 00750, AID_ROOT, AID_ROOT, 0, "system/bin/install-recovery.sh" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/bin/*" },
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{ 00755, AID_ROOT, AID_ROOT, 0, "system/lib/valgrind/*" },
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{ 00755, AID_ROOT, AID_ROOT, 0, "system/lib64/valgrind/*" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/xbin/*" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "system/vendor/bin/*" },
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{ 00755, AID_ROOT, AID_SHELL, 0, "vendor/bin/*" },
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{ 00750, AID_ROOT, AID_SHELL, 0, "sbin/*" },
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{ 00755, AID_ROOT, AID_ROOT, 0, "bin/*" },
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{ 00750, AID_ROOT, AID_SHELL, 0, "init*" },
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{ 00750, AID_ROOT, AID_SHELL, 0, "sbin/fs_mgr" },
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{ 00640, AID_ROOT, AID_SHELL, 0, "fstab.*" },
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{ 00644, AID_ROOT, AID_ROOT, 0, 0 },
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};
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static inline void fs_config(const char *path, int dir,
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unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities)
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{
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const struct fs_path_config *pc;
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int plen;
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if (path[0] == '/') {
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path++;
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}
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pc = dir ? android_dirs : android_files;
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plen = strlen(path);
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for(; pc->prefix; pc++){
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int len = strlen(pc->prefix);
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if (dir) {
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if(plen < len) continue;
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if(!strncmp(pc->prefix, path, len)) break;
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continue;
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}
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/* If name ends in * then allow partial matches. */
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if (pc->prefix[len -1] == '*') {
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if(!strncmp(pc->prefix, path, len - 1)) break;
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} else if (plen == len){
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if(!strncmp(pc->prefix, path, len)) break;
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}
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}
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*uid = pc->uid;
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*gid = pc->gid;
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*mode = (*mode & (~07777)) | pc->mode;
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*capabilities = pc->capabilities;
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#if 0
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fprintf(stderr,"< '%s' '%s' %d %d %o >\n",
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path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode);
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#endif
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}
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#endif
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#endif
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