android_filesystem_config.h revision 4a6f2321e76685b9489d020980dffb1d9ac73fc0
1/* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17/* This file is used to define the properties of the filesystem 18** images generated by build tools (mkbootfs and mkyaffs2image) and 19** by the device side of adb. 20*/ 21 22#ifndef _ANDROID_FILESYSTEM_CONFIG_H_ 23#define _ANDROID_FILESYSTEM_CONFIG_H_ 24 25#include <string.h> 26#include <sys/stat.h> 27#include <sys/types.h> 28 29/* This is the master Users and Groups config for the platform. 30** DO NOT EVER RENUMBER. 31*/ 32 33#define AID_ROOT 0 /* traditional unix root user */ 34 35#define AID_SYSTEM 1000 /* system server */ 36 37#define AID_RADIO 1001 /* telephony subsystem, RIL */ 38#define AID_BLUETOOTH 1002 /* bluetooth subsystem */ 39#define AID_GRAPHICS 1003 /* graphics devices */ 40#define AID_INPUT 1004 /* input devices */ 41#define AID_AUDIO 1005 /* audio devices */ 42#define AID_CAMERA 1006 /* camera devices */ 43#define AID_LOG 1007 /* log devices */ 44#define AID_COMPASS 1008 /* compass device */ 45#define AID_MOUNT 1009 /* mountd socket */ 46#define AID_WIFI 1010 /* wifi subsystem */ 47#define AID_ADB 1011 /* android debug bridge (adbd) */ 48#define AID_INSTALL 1012 /* group for installing packages */ 49#define AID_MEDIA 1013 /* mediaserver process */ 50#define AID_DHCP 1014 /* dhcp client */ 51#define AID_SDCARD_RW 1015 /* external storage write access */ 52#define AID_VPN 1016 /* vpn system */ 53 54#define AID_SHELL 2000 /* adb and debug shell user */ 55#define AID_CACHE 2001 /* cache access */ 56#define AID_DIAG 2002 /* access to diagnostic resources */ 57 58/* The 3000 series are intended for use as supplemental group id's only. 59 * They indicate special Android capabilities that the kernel is aware of. */ 60#define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ 61#define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ 62#define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ 63#define AID_NET_RAW 3004 /* can create raw INET sockets */ 64 65#define AID_MISC 9998 /* access to misc storage */ 66#define AID_NOBODY 9999 67 68#define AID_APP 10000 /* first app user */ 69 70#if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) 71struct android_id_info { 72 const char *name; 73 unsigned aid; 74}; 75 76static struct android_id_info android_ids[] = { 77 { "root", AID_ROOT, }, 78 { "system", AID_SYSTEM, }, 79 { "radio", AID_RADIO, }, 80 { "bluetooth", AID_BLUETOOTH, }, 81 { "graphics", AID_GRAPHICS, }, 82 { "input", AID_INPUT, }, 83 { "audio", AID_AUDIO, }, 84 { "camera", AID_CAMERA, }, 85 { "log", AID_LOG, }, 86 { "compass", AID_COMPASS, }, 87 { "mount", AID_MOUNT, }, 88 { "wifi", AID_WIFI, }, 89 { "dhcp", AID_DHCP, }, 90 { "adb", AID_ADB, }, 91 { "install", AID_INSTALL, }, 92 { "media", AID_MEDIA, }, 93 { "shell", AID_SHELL, }, 94 { "cache", AID_CACHE, }, 95 { "diag", AID_DIAG, }, 96 { "net_bt_admin", AID_NET_BT_ADMIN, }, 97 { "net_bt", AID_NET_BT, }, 98 { "sdcard_rw", AID_SDCARD_RW, }, 99 { "vpn", AID_VPN, }, 100 { "inet", AID_INET, }, 101 { "net_raw", AID_NET_RAW, }, 102 { "misc", AID_MISC, }, 103 { "nobody", AID_NOBODY, }, 104}; 105 106#define android_id_count \ 107 (sizeof(android_ids) / sizeof(android_ids[0])) 108 109struct fs_path_config { 110 unsigned mode; 111 unsigned uid; 112 unsigned gid; 113 const char *prefix; 114}; 115 116/* Rules for directories. 117** These rules are applied based on "first match", so they 118** should start with the most specific path and work their 119** way up to the root. 120*/ 121 122static struct fs_path_config android_dirs[] = { 123 { 00770, AID_SYSTEM, AID_CACHE, "cache" }, 124 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" }, 125 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" }, 126 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" }, 127 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" }, 128 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" }, 129 { 00771, AID_SHELL, AID_SHELL, "data/local" }, 130 { 01771, AID_SYSTEM, AID_MISC, "data/misc" }, 131 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" }, 132 { 00771, AID_SYSTEM, AID_SYSTEM, "data" }, 133 { 00750, AID_ROOT, AID_SHELL, "sbin" }, 134 { 00755, AID_ROOT, AID_SHELL, "system/bin" }, 135 { 00755, AID_ROOT, AID_SHELL, "system/xbin" }, 136 { 00777, AID_ROOT, AID_ROOT, "system/etc/ppp" }, /* REMOVE */ 137 { 00777, AID_ROOT, AID_ROOT, "sdcard" }, 138 { 00755, AID_ROOT, AID_ROOT, 0 }, 139}; 140 141/* Rules for files. 142** These rules are applied based on "first match", so they 143** should start with the most specific path and work their 144** way up to the root. Prefixes ending in * denotes wildcard 145** and will allow partial matches. 146*/ 147static struct fs_path_config android_files[] = { 148 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/ip-up" }, 149 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/ip-down" }, 150 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" }, 151 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" }, 152 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" }, 153 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" }, 154 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" }, 155 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.gprs-pppd" }, 156 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" }, 157 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" }, 158 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/hcid.conf" }, 159 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/input.conf" }, 160 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluez/audio.conf" }, 161 { 00440, AID_RADIO, AID_AUDIO, "/system/etc/AudioPara4.csv" }, 162 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" }, 163 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" }, 164 { 00644, AID_APP, AID_APP, "data/data/*" }, 165 /* the following two files are INTENTIONALLY set-gid and not set-uid. 166 * Do not change. */ 167 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" }, 168 { 02755, AID_ROOT, AID_INET, "system/bin/netcfg" }, 169 /* the following four files are INTENTIONALLY set-uid, but they 170 * are NOT included on user builds. */ 171 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" }, 172 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" }, 173 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" }, 174 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" }, 175 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" }, 176 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" }, 177 { 00750, AID_ROOT, AID_SHELL, "sbin/*" }, 178 { 00755, AID_ROOT, AID_ROOT, "bin/*" }, 179 { 00750, AID_ROOT, AID_SHELL, "init*" }, 180 { 00644, AID_ROOT, AID_ROOT, 0 }, 181}; 182 183static inline void fs_config(const char *path, int dir, 184 unsigned *uid, unsigned *gid, unsigned *mode) 185{ 186 struct fs_path_config *pc; 187 int plen; 188 189 pc = dir ? android_dirs : android_files; 190 plen = strlen(path); 191 for(; pc->prefix; pc++){ 192 int len = strlen(pc->prefix); 193 if (dir) { 194 if(plen < len) continue; 195 if(!strncmp(pc->prefix, path, len)) break; 196 continue; 197 } 198 /* If name ends in * then allow partial matches. */ 199 if (pc->prefix[len -1] == '*') { 200 if(!strncmp(pc->prefix, path, len - 1)) break; 201 } else if (plen == len){ 202 if(!strncmp(pc->prefix, path, len)) break; 203 } 204 } 205 *uid = pc->uid; 206 *gid = pc->gid; 207 *mode = (*mode & (~07777)) | pc->mode; 208 209#if 0 210 fprintf(stderr,"< '%s' '%s' %d %d %o >\n", 211 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); 212#endif 213} 214#endif 215#endif 216