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 #define AID_USB 1018 /* USB devices */ 55 #define AID_GPS 1021 /* GPS daemon */ 56 #define AID_NFC 1022 /* nfc subsystem */ 57 58 #define AID_SHELL 2000 /* adb and debug shell user */ 59 #define AID_CACHE 2001 /* cache access */ 60 #define AID_DIAG 2002 /* access to diagnostic resources */ 61 62 /* The 3000 series are intended for use as supplemental group id's only. 63 * They indicate special Android capabilities that the kernel is aware of. */ 64 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ 65 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ 66 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ 67 #define AID_NET_RAW 3004 /* can create raw INET sockets */ 68 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */ 69 70 #define AID_MISC 9998 /* access to misc storage */ 71 #define AID_NOBODY 9999 72 73 #define AID_APP 10000 /* first app user */ 74 75 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) 76 struct android_id_info { 77 const char *name; 78 unsigned aid; 79 }; 80 81 static const struct android_id_info android_ids[] = { 82 { "root", AID_ROOT, }, 83 { "system", AID_SYSTEM, }, 84 { "radio", AID_RADIO, }, 85 { "bluetooth", AID_BLUETOOTH, }, 86 { "graphics", AID_GRAPHICS, }, 87 { "input", AID_INPUT, }, 88 { "audio", AID_AUDIO, }, 89 { "camera", AID_CAMERA, }, 90 { "log", AID_LOG, }, 91 { "compass", AID_COMPASS, }, 92 { "mount", AID_MOUNT, }, 93 { "wifi", AID_WIFI, }, 94 { "dhcp", AID_DHCP, }, 95 { "adb", AID_ADB, }, 96 { "install", AID_INSTALL, }, 97 { "media", AID_MEDIA, }, 98 { "nfc", AID_NFC, }, 99 { "shell", AID_SHELL, }, 100 { "cache", AID_CACHE, }, 101 { "diag", AID_DIAG, }, 102 { "net_bt_admin", AID_NET_BT_ADMIN, }, 103 { "net_bt", AID_NET_BT, }, 104 { "sdcard_rw", AID_SDCARD_RW, }, 105 { "vpn", AID_VPN, }, 106 { "keystore", AID_KEYSTORE, }, 107 { "usb", AID_USB, }, 108 { "gps", AID_GPS, }, 109 { "inet", AID_INET, }, 110 { "net_raw", AID_NET_RAW, }, 111 { "net_admin", AID_NET_ADMIN, }, 112 { "misc", AID_MISC, }, 113 { "nobody", AID_NOBODY, }, 114 }; 115 116 #define android_id_count \ 117 (sizeof(android_ids) / sizeof(android_ids[0])) 118 119 struct fs_path_config { 120 unsigned mode; 121 unsigned uid; 122 unsigned gid; 123 const char *prefix; 124 }; 125 126 /* Rules for directories. 127 ** These rules are applied based on "first match", so they 128 ** should start with the most specific path and work their 129 ** way up to the root. 130 */ 131 132 static struct fs_path_config android_dirs[] = { 133 { 00770, AID_SYSTEM, AID_CACHE, "cache" }, 134 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app" }, 135 { 00771, AID_SYSTEM, AID_SYSTEM, "data/app-private" }, 136 { 00771, AID_SYSTEM, AID_SYSTEM, "data/dalvik-cache" }, 137 { 00771, AID_SYSTEM, AID_SYSTEM, "data/data" }, 138 { 00771, AID_SHELL, AID_SHELL, "data/local/tmp" }, 139 { 00771, AID_SHELL, AID_SHELL, "data/local" }, 140 { 01771, AID_SYSTEM, AID_MISC, "data/misc" }, 141 { 00770, AID_DHCP, AID_DHCP, "data/misc/dhcp" }, 142 { 00771, AID_SYSTEM, AID_SYSTEM, "data" }, 143 { 00750, AID_ROOT, AID_SHELL, "sbin" }, 144 { 00755, AID_ROOT, AID_SHELL, "system/bin" }, 145 { 00755, AID_ROOT, AID_SHELL, "system/vendor" }, 146 { 00755, AID_ROOT, AID_SHELL, "system/xbin" }, 147 { 00755, AID_ROOT, AID_ROOT, "system/etc/ppp" }, 148 { 00777, AID_ROOT, AID_ROOT, "sdcard" }, 149 { 00755, AID_ROOT, AID_ROOT, 0 }, 150 }; 151 152 /* Rules for files. 153 ** These rules are applied based on "first match", so they 154 ** should start with the most specific path and work their 155 ** way up to the root. Prefixes ending in * denotes wildcard 156 ** and will allow partial matches. 157 */ 158 static struct fs_path_config android_files[] = { 159 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.rc" }, 160 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.goldfish.sh" }, 161 { 00440, AID_ROOT, AID_SHELL, "system/etc/init.trout.rc" }, 162 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.ril" }, 163 { 00550, AID_ROOT, AID_SHELL, "system/etc/init.testmenu" }, 164 { 00550, AID_DHCP, AID_SHELL, "system/etc/dhcpcd/dhcpcd-run-hooks" }, 165 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/dbus.conf" }, 166 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/main.conf" }, 167 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/input.conf" }, 168 { 00440, AID_BLUETOOTH, AID_BLUETOOTH, "system/etc/bluetooth/audio.conf" }, 169 { 00444, AID_NET_BT, AID_NET_BT, "system/etc/bluetooth/blacklist.conf" }, 170 { 00640, AID_SYSTEM, AID_SYSTEM, "system/etc/bluetooth/auto_pairing.conf" }, 171 { 00444, AID_RADIO, AID_AUDIO, "system/etc/AudioPara4.csv" }, 172 { 00555, AID_ROOT, AID_ROOT, "system/etc/ppp/*" }, 173 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app/*" }, 174 { 00644, AID_SYSTEM, AID_SYSTEM, "data/app-private/*" }, 175 { 00644, AID_APP, AID_APP, "data/data/*" }, 176 /* the following two files are INTENTIONALLY set-gid and not set-uid. 177 * Do not change. */ 178 { 02755, AID_ROOT, AID_NET_RAW, "system/bin/ping" }, 179 { 02750, AID_ROOT, AID_INET, "system/bin/netcfg" }, 180 /* the following five files are INTENTIONALLY set-uid, but they 181 * are NOT included on user builds. */ 182 { 06755, AID_ROOT, AID_ROOT, "system/xbin/su" }, 183 { 06755, AID_ROOT, AID_ROOT, "system/xbin/librank" }, 184 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procrank" }, 185 { 06755, AID_ROOT, AID_ROOT, "system/xbin/procmem" }, 186 { 06755, AID_ROOT, AID_ROOT, "system/xbin/tcpdump" }, 187 { 04770, AID_ROOT, AID_RADIO, "system/bin/pppd-ril" }, 188 /* the following file is INTENTIONALLY set-uid, and IS included 189 * in user builds. */ 190 { 06750, AID_ROOT, AID_SHELL, "system/bin/run-as" }, 191 { 00755, AID_ROOT, AID_SHELL, "system/bin/*" }, 192 { 00755, AID_ROOT, AID_SHELL, "system/xbin/*" }, 193 { 00755, AID_ROOT, AID_SHELL, "system/vendor/bin/*" }, 194 { 00750, AID_ROOT, AID_SHELL, "sbin/*" }, 195 { 00755, AID_ROOT, AID_ROOT, "bin/*" }, 196 { 00750, AID_ROOT, AID_SHELL, "init*" }, 197 { 00644, AID_ROOT, AID_ROOT, 0 }, 198 }; 199 200 static inline void fs_config(const char *path, int dir, 201 unsigned *uid, unsigned *gid, unsigned *mode) 202 { 203 struct fs_path_config *pc; 204 int plen; 205 206 pc = dir ? android_dirs : android_files; 207 plen = strlen(path); 208 for(; pc->prefix; pc++){ 209 int len = strlen(pc->prefix); 210 if (dir) { 211 if(plen < len) continue; 212 if(!strncmp(pc->prefix, path, len)) break; 213 continue; 214 } 215 /* If name ends in * then allow partial matches. */ 216 if (pc->prefix[len -1] == '*') { 217 if(!strncmp(pc->prefix, path, len - 1)) break; 218 } else if (plen == len){ 219 if(!strncmp(pc->prefix, path, len)) break; 220 } 221 } 222 *uid = pc->uid; 223 *gid = pc->gid; 224 *mode = (*mode & (~07777)) | pc->mode; 225 226 #if 0 227 fprintf(stderr,"< '%s' '%s' %d %d %o >\n", 228 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); 229 #endif 230 } 231 #endif 232 #endif 233
