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 #define AID_KEYSTORE 1017 /* keystore subsystem */ 54 55 #define AID_SHELL 2000 /* adb and debug shell user */ 56 #define AID_CACHE 2001 /* cache access */ 57 #define AID_DIAG 2002 /* access to diagnostic resources */ 58 59 /* The 3000 series are intended for use as supplemental group id's only. 60 * They indicate special Android capabilities that the kernel is aware of. */ 61 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ 62 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ 63 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ 64 #define AID_NET_RAW 3004 /* can create raw INET sockets */ 65 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */ 66 67 #define AID_MISC 9998 /* access to misc storage */ 68 #define AID_NOBODY 9999 69 70 #define AID_APP 10000 /* first app user */ 71 72 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) 73 struct android_id_info { 74 const char *name; 75 unsigned aid; 76 }; 77 78 static struct android_id_info android_ids[] = { 79 { "root", AID_ROOT, }, 80 { "system", AID_SYSTEM, }, 81 { "radio", AID_RADIO, }, 82 { "bluetooth", AID_BLUETOOTH, }, 83 { "graphics", AID_GRAPHICS, }, 84 { "input", AID_INPUT, }, 85 { "audio", AID_AUDIO, }, 86 { "camera", AID_CAMERA, }, 87 { "log", AID_LOG, }, 88 { "compass", AID_COMPASS, }, 89 { "mount", AID_MOUNT, }, 90 { "wifi", AID_WIFI, }, 91 { "dhcp", AID_DHCP, }, 92 { "adb", AID_ADB, }, 93 { "install", AID_INSTALL, }, 94 { "media", AID_MEDIA, }, 95 { "shell", AID_SHELL, }, 96 { "cache", AID_CACHE, }, 97 { "diag", AID_DIAG, }, 98 { "net_bt_admin", AID_NET_BT_ADMIN, }, 99 { "net_bt", AID_NET_BT, }, 100 { "sdcard_rw", AID_SDCARD_RW, }, 101 { "vpn", AID_VPN, }, 102 { "keystore", AID_KEYSTORE, }, 103 { "inet", AID_INET, }, 104 { "net_raw", AID_NET_RAW, }, 105 { "net_admin", AID_NET_ADMIN, }, 106 { "misc", AID_MISC, }, 107 { "nobody", AID_NOBODY, }, 108 }; 109 110 #define android_id_count \ 111 (sizeof(android_ids) / sizeof(android_ids[0])) 112 113 struct fs_path_config { 114 unsigned mode; 115 unsigned uid; 116 unsigned gid; 117 const char *prefix; 118 }; 119 120 /* Rules for directories. 121 ** These rules are applied based on "first match", so they 122 ** should start with the most specific path and work their 123 ** way up to the root. 124 */ 125 126 static struct fs_path_config android_dirs[] = { 127 { 00770, AID_SYSTEM, AID_CACHE, "cache" }, 128 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" }, 129 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" }, 130 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" }, 131 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" }, 132 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" }, 133 { 00771, AID_SHELL, AID_SHELL, "data/local" }, 134 { 01771, AID_SYSTEM, AID_MISC, "data/misc" }, 135 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" }, 136 { 00771, AID_SYSTEM, AID_SYSTEM, "data" }, 137 { 00750, AID_ROOT, AID_SHELL, "sbin" }, 138 { 00755, AID_ROOT, AID_SHELL, "system/bin" }, 139 { 00755, AID_ROOT, AID_SHELL, "system/xbin" }, 140 { 00755, AID_ROOT, AID_ROOT, "system/etc/ppp" }, 141 { 00777, AID_ROOT, AID_ROOT, "sdcard" }, 142 { 00755, AID_ROOT, AID_ROOT, 0 }, 143 }; 144 145 /* Rules for files. 146 ** These rules are applied based on "first match", so they 147 ** should start with the most specific path and work their 148 ** way up to the root. Prefixes ending in * denotes wildcard 149 ** and will allow partial matches. 150 */ 151 static struct fs_path_config android_files[] = { 152 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" }, 153 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" }, 154 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" }, 155 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" }, 156 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" }, 157 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" }, 158 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" }, 159 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/main.conf" }, 160 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/input.conf" }, 161 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/audio.conf" }, 162 { 00444, AID_NET_BT, AID_NET_BT, "system/etc/bluetooth/blacklist.conf" }, 163 { 00640, AID_SYSTEM, AID_SYSTEM, "system/etc/bluetooth/auto_pairing.conf" }, 164 { 00444, AID_RADIO, AID_AUDIO, "system/etc/AudioPara4.csv" }, 165 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/*" }, 166 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" }, 167 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" }, 168 { 00644, AID_APP, AID_APP, "data/data/*" }, 169 /* the following two files are INTENTIONALLY set-gid and not set-uid. 170 * Do not change. */ 171 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" }, 172 { 02750, AID_ROOT, AID_INET, "system/bin/netcfg" }, 173 /* the following five files are INTENTIONALLY set-uid, but they 174 * are NOT included on user builds. */ 175 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" }, 176 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" }, 177 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" }, 178 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" }, 179 { 06755, AID_ROOT, AID_ROOT, "system/xbin/tcpdump" }, 180 { 04770, AID_ROOT, AID_RADIO, "system/bin/pppd-ril" }, 181 /* the following file is INTENTIONALLY set-uid, and IS included 182 * in user builds. */ 183 { 06750, AID_ROOT, AID_SHELL, "system/bin/run-as" }, 184 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" }, 185 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" }, 186 { 00750, AID_ROOT, AID_SHELL, "sbin/*" }, 187 { 00755, AID_ROOT, AID_ROOT, "bin/*" }, 188 { 00750, AID_ROOT, AID_SHELL, "init*" }, 189 { 00644, AID_ROOT, AID_ROOT, 0 }, 190 }; 191 192 static inline void fs_config(const char *path, int dir, 193 unsigned *uid, unsigned *gid, unsigned *mode) 194 { 195 struct fs_path_config *pc; 196 int plen; 197 198 pc = dir ? android_dirs : android_files; 199 plen = strlen(path); 200 for(; pc->prefix; pc++){ 201 int len = strlen(pc->prefix); 202 if (dir) { 203 if(plen < len) continue; 204 if(!strncmp(pc->prefix, path, len)) break; 205 continue; 206 } 207 /* If name ends in * then allow partial matches. */ 208 if (pc->prefix[len -1] == '*') { 209 if(!strncmp(pc->prefix, path, len - 1)) break; 210 } else if (plen == len){ 211 if(!strncmp(pc->prefix, path, len)) break; 212 } 213 } 214 *uid = pc->uid; 215 *gid = pc->gid; 216 *mode = (*mode & (~07777)) | pc->mode; 217 218 #if 0 219 fprintf(stderr,"< '%s' '%s' %d %d %o >\n", 220 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); 221 #endif 222 } 223 #endif 224 #endif 225
