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 #include <stdint.h> 29 30 #ifdef HAVE_ANDROID_OS 31 #include <linux/capability.h> 32 #else 33 #include "android_filesystem_capability.h" 34 #endif 35 36 /* This is the master Users and Groups config for the platform. 37 ** DO NOT EVER RENUMBER. 38 */ 39 40 #define AID_ROOT 0 /* traditional unix root user */ 41 42 #define AID_SYSTEM 1000 /* system server */ 43 44 #define AID_RADIO 1001 /* telephony subsystem, RIL */ 45 #define AID_BLUETOOTH 1002 /* bluetooth subsystem */ 46 #define AID_GRAPHICS 1003 /* graphics devices */ 47 #define AID_INPUT 1004 /* input devices */ 48 #define AID_AUDIO 1005 /* audio devices */ 49 #define AID_CAMERA 1006 /* camera devices */ 50 #define AID_LOG 1007 /* log devices */ 51 #define AID_COMPASS 1008 /* compass device */ 52 #define AID_MOUNT 1009 /* mountd socket */ 53 #define AID_WIFI 1010 /* wifi subsystem */ 54 #define AID_ADB 1011 /* android debug bridge (adbd) */ 55 #define AID_INSTALL 1012 /* group for installing packages */ 56 #define AID_MEDIA 1013 /* mediaserver process */ 57 #define AID_DHCP 1014 /* dhcp client */ 58 #define AID_SDCARD_RW 1015 /* external storage write access */ 59 #define AID_VPN 1016 /* vpn system */ 60 #define AID_KEYSTORE 1017 /* keystore subsystem */ 61 #define AID_USB 1018 /* USB devices */ 62 #define AID_DRM 1019 /* DRM server */ 63 #define AID_MDNSR 1020 /* MulticastDNSResponder (service discovery) */ 64 #define AID_GPS 1021 /* GPS daemon */ 65 #define AID_UNUSED1 1022 /* deprecated, DO NOT USE */ 66 #define AID_MEDIA_RW 1023 /* internal media storage write access */ 67 #define AID_MTP 1024 /* MTP USB driver access */ 68 #define AID_UNUSED2 1025 /* deprecated, DO NOT USE */ 69 #define AID_DRMRPC 1026 /* group for drm rpc */ 70 #define AID_NFC 1027 /* nfc subsystem */ 71 #define AID_SDCARD_R 1028 /* external storage read access */ 72 #define AID_CLAT 1029 /* clat part of nat464 */ 73 #define AID_LOOP_RADIO 1030 /* loop radio devices */ 74 #define AID_MEDIA_DRM 1031 /* MediaDrm plugins */ 75 76 #define AID_SHELL 2000 /* adb and debug shell user */ 77 #define AID_CACHE 2001 /* cache access */ 78 #define AID_DIAG 2002 /* access to diagnostic resources */ 79 80 /* The 3000 series are intended for use as supplemental group id's only. 81 * They indicate special Android capabilities that the kernel is aware of. */ 82 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ 83 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ 84 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ 85 #define AID_NET_RAW 3004 /* can create raw INET sockets */ 86 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */ 87 #define AID_NET_BW_STATS 3006 /* read bandwidth statistics */ 88 #define AID_NET_BW_ACCT 3007 /* change bandwidth statistics accounting */ 89 #define AID_NET_BT_STACK 3008 /* bluetooth: access config files */ 90 91 #define AID_MISC 9998 /* access to misc storage */ 92 #define AID_NOBODY 9999 93 94 #define AID_APP 10000 /* first app user */ 95 96 #define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */ 97 #define AID_ISOLATED_END 99999 /* end of uids for fully isolated sandboxed processes */ 98 99 #define AID_USER 100000 /* offset for uid ranges for each user */ 100 101 #define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */ 102 #define AID_SHARED_GID_END 59999 /* start of gids for apps in each user to share */ 103 104 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) 105 struct android_id_info { 106 const char *name; 107 unsigned aid; 108 }; 109 110 static const struct android_id_info android_ids[] = { 111 { "root", AID_ROOT, }, 112 { "system", AID_SYSTEM, }, 113 { "radio", AID_RADIO, }, 114 { "bluetooth", AID_BLUETOOTH, }, 115 { "graphics", AID_GRAPHICS, }, 116 { "input", AID_INPUT, }, 117 { "audio", AID_AUDIO, }, 118 { "camera", AID_CAMERA, }, 119 { "log", AID_LOG, }, 120 { "compass", AID_COMPASS, }, 121 { "mount", AID_MOUNT, }, 122 { "wifi", AID_WIFI, }, 123 { "dhcp", AID_DHCP, }, 124 { "adb", AID_ADB, }, 125 { "install", AID_INSTALL, }, 126 { "media", AID_MEDIA, }, 127 { "drm", AID_DRM, }, 128 { "mdnsr", AID_MDNSR, }, 129 { "nfc", AID_NFC, }, 130 { "drmrpc", AID_DRMRPC, }, 131 { "shell", AID_SHELL, }, 132 { "cache", AID_CACHE, }, 133 { "diag", AID_DIAG, }, 134 { "net_bt_admin", AID_NET_BT_ADMIN, }, 135 { "net_bt", AID_NET_BT, }, 136 { "net_bt_stack", AID_NET_BT_STACK, }, 137 { "sdcard_r", AID_SDCARD_R, }, 138 { "sdcard_rw", AID_SDCARD_RW, }, 139 { "media_rw", AID_MEDIA_RW, }, 140 { "vpn", AID_VPN, }, 141 { "keystore", AID_KEYSTORE, }, 142 { "usb", AID_USB, }, 143 { "mtp", AID_MTP, }, 144 { "gps", AID_GPS, }, 145 { "inet", AID_INET, }, 146 { "net_raw", AID_NET_RAW, }, 147 { "net_admin", AID_NET_ADMIN, }, 148 { "net_bw_stats", AID_NET_BW_STATS, }, 149 { "net_bw_acct", AID_NET_BW_ACCT, }, 150 { "loop_radio", AID_LOOP_RADIO, }, 151 { "misc", AID_MISC, }, 152 { "nobody", AID_NOBODY, }, 153 { "clat", AID_CLAT, }, 154 { "mediadrm", AID_MEDIA_DRM, }, 155 }; 156 157 #define android_id_count \ 158 (sizeof(android_ids) / sizeof(android_ids[0])) 159 160 struct fs_path_config { 161 unsigned mode; 162 unsigned uid; 163 unsigned gid; 164 uint64_t capabilities; 165 const char *prefix; 166 }; 167 168 /* Rules for directories. 169 ** These rules are applied based on "first match", so they 170 ** should start with the most specific path and work their 171 ** way up to the root. 172 */ 173 174 static const struct fs_path_config android_dirs[] = { 175 { 00770, AID_SYSTEM, AID_CACHE, 0, "cache" }, 176 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" }, 177 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" }, 178 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/dalvik-cache" }, 179 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" }, 180 { 00771, AID_SHELL, AID_SHELL, 0, "data/local/tmp" }, 181 { 00771, AID_SHELL, AID_SHELL, 0, "data/local" }, 182 { 01771, AID_SYSTEM, AID_MISC, 0, "data/misc" }, 183 { 00770, AID_DHCP, AID_DHCP, 0, "data/misc/dhcp" }, 184 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" }, 185 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" }, 186 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" }, 187 { 00750, AID_ROOT, AID_SHELL, 0, "sbin" }, 188 { 00755, AID_ROOT, AID_SHELL, 0, "system/bin" }, 189 { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor" }, 190 { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin" }, 191 { 00755, AID_ROOT, AID_ROOT, 0, "system/etc/ppp" }, 192 { 00755, AID_ROOT, AID_SHELL, 0, "vendor" }, 193 { 00777, AID_ROOT, AID_ROOT, 0, "sdcard" }, 194 { 00755, AID_ROOT, AID_ROOT, 0, 0 }, 195 }; 196 197 /* Rules for files. 198 ** These rules are applied based on "first match", so they 199 ** should start with the most specific path and work their 200 ** way up to the root. Prefixes ending in * denotes wildcard 201 ** and will allow partial matches. 202 */ 203 static const struct fs_path_config android_files[] = { 204 { 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.rc" }, 205 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.sh" }, 206 { 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.trout.rc" }, 207 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.ril" }, 208 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.testmenu" }, 209 { 00550, AID_DHCP, AID_SHELL, 0, "system/etc/dhcpcd/dhcpcd-run-hooks" }, 210 { 00444, AID_RADIO, AID_AUDIO, 0, "system/etc/AudioPara4.csv" }, 211 { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/ppp/*" }, 212 { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/rc.*" }, 213 { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app/*" }, 214 { 00644, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/*" }, 215 { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private/*" }, 216 { 00644, AID_APP, AID_APP, 0, "data/data/*" }, 217 { 00755, AID_ROOT, AID_ROOT, 0, "system/bin/ping" }, 218 219 /* the following file is INTENTIONALLY set-gid and not set-uid. 220 * Do not change. */ 221 { 02750, AID_ROOT, AID_INET, 0, "system/bin/netcfg" }, 222 223 /* the following five files are INTENTIONALLY set-uid, but they 224 * are NOT included on user builds. */ 225 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/su" }, 226 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/librank" }, 227 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procrank" }, 228 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procmem" }, 229 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/tcpdump" }, 230 { 04770, AID_ROOT, AID_RADIO, 0, "system/bin/pppd-ril" }, 231 232 /* the following file has enhanced capabilities and IS included in user builds. */ 233 { 00750, AID_ROOT, AID_SHELL, (1 << CAP_SETUID) | (1 << CAP_SETGID), "system/bin/run-as" }, 234 235 { 00755, AID_ROOT, AID_SHELL, 0, "system/bin/*" }, 236 { 00755, AID_ROOT, AID_ROOT, 0, "system/lib/valgrind/*" }, 237 { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin/*" }, 238 { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor/bin/*" }, 239 { 00755, AID_ROOT, AID_SHELL, 0, "vendor/bin/*" }, 240 { 00750, AID_ROOT, AID_SHELL, 0, "sbin/*" }, 241 { 00755, AID_ROOT, AID_ROOT, 0, "bin/*" }, 242 { 00750, AID_ROOT, AID_SHELL, 0, "init*" }, 243 { 00750, AID_ROOT, AID_SHELL, 0, "charger*" }, 244 { 00750, AID_ROOT, AID_SHELL, 0, "sbin/fs_mgr" }, 245 { 00640, AID_ROOT, AID_SHELL, 0, "fstab.*" }, 246 { 00644, AID_ROOT, AID_ROOT, 0, 0 }, 247 }; 248 249 static inline void fs_config(const char *path, int dir, 250 unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities) 251 { 252 const struct fs_path_config *pc; 253 int plen; 254 255 if (path[0] == '/') { 256 path++; 257 } 258 259 pc = dir ? android_dirs : android_files; 260 plen = strlen(path); 261 for(; pc->prefix; pc++){ 262 int len = strlen(pc->prefix); 263 if (dir) { 264 if(plen < len) continue; 265 if(!strncmp(pc->prefix, path, len)) break; 266 continue; 267 } 268 /* If name ends in * then allow partial matches. */ 269 if (pc->prefix[len -1] == '*') { 270 if(!strncmp(pc->prefix, path, len - 1)) break; 271 } else if (plen == len){ 272 if(!strncmp(pc->prefix, path, len)) break; 273 } 274 } 275 *uid = pc->uid; 276 *gid = pc->gid; 277 *mode = (*mode & (~07777)) | pc->mode; 278 *capabilities = pc->capabilities; 279 280 #if 0 281 fprintf(stderr,"< '%s' '%s' %d %d %o >\n", 282 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); 283 #endif 284 } 285 #endif 286 #endif 287
