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 #define AID_PACKAGE_INFO 1032 /* access to installed package details */ 76 #define AID_SDCARD_PICS 1033 /* external storage photos access */ 77 #define AID_SDCARD_AV 1034 /* external storage audio/video access */ 78 #define AID_SDCARD_ALL 1035 /* access all users external storage */ 79 80 #define AID_SHELL 2000 /* adb and debug shell user */ 81 #define AID_CACHE 2001 /* cache access */ 82 #define AID_DIAG 2002 /* access to diagnostic resources */ 83 84 /* The 3000 series are intended for use as supplemental group id's only. 85 * They indicate special Android capabilities that the kernel is aware of. */ 86 #define AID_NET_BT_ADMIN 3001 /* bluetooth: create any socket */ 87 #define AID_NET_BT 3002 /* bluetooth: create sco, rfcomm or l2cap sockets */ 88 #define AID_INET 3003 /* can create AF_INET and AF_INET6 sockets */ 89 #define AID_NET_RAW 3004 /* can create raw INET sockets */ 90 #define AID_NET_ADMIN 3005 /* can configure interfaces and routing tables. */ 91 #define AID_NET_BW_STATS 3006 /* read bandwidth statistics */ 92 #define AID_NET_BW_ACCT 3007 /* change bandwidth statistics accounting */ 93 #define AID_NET_BT_STACK 3008 /* bluetooth: access config files */ 94 95 #define AID_MISC 9998 /* access to misc storage */ 96 #define AID_NOBODY 9999 97 98 #define AID_APP 10000 /* first app user */ 99 100 #define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */ 101 #define AID_ISOLATED_END 99999 /* end of uids for fully isolated sandboxed processes */ 102 103 #define AID_USER 100000 /* offset for uid ranges for each user */ 104 105 #define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */ 106 #define AID_SHARED_GID_END 59999 /* start of gids for apps in each user to share */ 107 108 #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES) 109 struct android_id_info { 110 const char *name; 111 unsigned aid; 112 }; 113 114 static const struct android_id_info android_ids[] = { 115 { "root", AID_ROOT, }, 116 117 { "system", AID_SYSTEM, }, 118 119 { "radio", AID_RADIO, }, 120 { "bluetooth", AID_BLUETOOTH, }, 121 { "graphics", AID_GRAPHICS, }, 122 { "input", AID_INPUT, }, 123 { "audio", AID_AUDIO, }, 124 { "camera", AID_CAMERA, }, 125 { "log", AID_LOG, }, 126 { "compass", AID_COMPASS, }, 127 { "mount", AID_MOUNT, }, 128 { "wifi", AID_WIFI, }, 129 { "adb", AID_ADB, }, 130 { "install", AID_INSTALL, }, 131 { "media", AID_MEDIA, }, 132 { "dhcp", AID_DHCP, }, 133 { "sdcard_rw", AID_SDCARD_RW, }, 134 { "vpn", AID_VPN, }, 135 { "keystore", AID_KEYSTORE, }, 136 { "usb", AID_USB, }, 137 { "drm", AID_DRM, }, 138 { "mdnsr", AID_MDNSR, }, 139 { "gps", AID_GPS, }, 140 // AID_UNUSED1 141 { "media_rw", AID_MEDIA_RW, }, 142 { "mtp", AID_MTP, }, 143 // AID_UNUSED2 144 { "drmrpc", AID_DRMRPC, }, 145 { "nfc", AID_NFC, }, 146 { "sdcard_r", AID_SDCARD_R, }, 147 { "clat", AID_CLAT, }, 148 { "loop_radio", AID_LOOP_RADIO, }, 149 { "mediadrm", AID_MEDIA_DRM, }, 150 { "package_info", AID_PACKAGE_INFO, }, 151 { "sdcard_pics", AID_SDCARD_PICS, }, 152 { "sdcard_av", AID_SDCARD_AV, }, 153 { "sdcard_all", AID_SDCARD_ALL, }, 154 155 { "shell", AID_SHELL, }, 156 { "cache", AID_CACHE, }, 157 { "diag", AID_DIAG, }, 158 159 { "net_bt_admin", AID_NET_BT_ADMIN, }, 160 { "net_bt", AID_NET_BT, }, 161 { "inet", AID_INET, }, 162 { "net_raw", AID_NET_RAW, }, 163 { "net_admin", AID_NET_ADMIN, }, 164 { "net_bw_stats", AID_NET_BW_STATS, }, 165 { "net_bw_acct", AID_NET_BW_ACCT, }, 166 { "net_bt_stack", AID_NET_BT_STACK, }, 167 168 { "misc", AID_MISC, }, 169 { "nobody", AID_NOBODY, }, 170 }; 171 172 #define android_id_count \ 173 (sizeof(android_ids) / sizeof(android_ids[0])) 174 175 struct fs_path_config { 176 unsigned mode; 177 unsigned uid; 178 unsigned gid; 179 uint64_t capabilities; 180 const char *prefix; 181 }; 182 183 /* Rules for directories. 184 ** These rules are applied based on "first match", so they 185 ** should start with the most specific path and work their 186 ** way up to the root. 187 */ 188 189 static const struct fs_path_config android_dirs[] = { 190 { 00770, AID_SYSTEM, AID_CACHE, 0, "cache" }, 191 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" }, 192 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" }, 193 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/dalvik-cache" }, 194 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" }, 195 { 00771, AID_SHELL, AID_SHELL, 0, "data/local/tmp" }, 196 { 00771, AID_SHELL, AID_SHELL, 0, "data/local" }, 197 { 01771, AID_SYSTEM, AID_MISC, 0, "data/misc" }, 198 { 00770, AID_DHCP, AID_DHCP, 0, "data/misc/dhcp" }, 199 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" }, 200 { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" }, 201 { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" }, 202 { 00750, AID_ROOT, AID_SHELL, 0, "sbin" }, 203 { 00755, AID_ROOT, AID_SHELL, 0, "system/bin" }, 204 { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor" }, 205 { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin" }, 206 { 00755, AID_ROOT, AID_ROOT, 0, "system/etc/ppp" }, 207 { 00755, AID_ROOT, AID_SHELL, 0, "vendor" }, 208 { 00777, AID_ROOT, AID_ROOT, 0, "sdcard" }, 209 { 00755, AID_ROOT, AID_ROOT, 0, 0 }, 210 }; 211 212 /* Rules for files. 213 ** These rules are applied based on "first match", so they 214 ** should start with the most specific path and work their 215 ** way up to the root. Prefixes ending in * denotes wildcard 216 ** and will allow partial matches. 217 */ 218 static const struct fs_path_config android_files[] = { 219 { 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.rc" }, 220 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.goldfish.sh" }, 221 { 00440, AID_ROOT, AID_SHELL, 0, "system/etc/init.trout.rc" }, 222 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.ril" }, 223 { 00550, AID_ROOT, AID_SHELL, 0, "system/etc/init.testmenu" }, 224 { 00550, AID_DHCP, AID_SHELL, 0, "system/etc/dhcpcd/dhcpcd-run-hooks" }, 225 { 00444, AID_RADIO, AID_AUDIO, 0, "system/etc/AudioPara4.csv" }, 226 { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/ppp/*" }, 227 { 00555, AID_ROOT, AID_ROOT, 0, "system/etc/rc.*" }, 228 { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app/*" }, 229 { 00644, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/*" }, 230 { 00644, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private/*" }, 231 { 00644, AID_APP, AID_APP, 0, "data/data/*" }, 232 { 00755, AID_ROOT, AID_ROOT, 0, "system/bin/ping" }, 233 234 /* the following file is INTENTIONALLY set-gid and not set-uid. 235 * Do not change. */ 236 { 02750, AID_ROOT, AID_INET, 0, "system/bin/netcfg" }, 237 238 /* the following five files are INTENTIONALLY set-uid, but they 239 * are NOT included on user builds. */ 240 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/su" }, 241 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/librank" }, 242 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procrank" }, 243 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/procmem" }, 244 { 06755, AID_ROOT, AID_ROOT, 0, "system/xbin/tcpdump" }, 245 { 04770, AID_ROOT, AID_RADIO, 0, "system/bin/pppd-ril" }, 246 247 /* the following files have enhanced capabilities and ARE included in user builds. */ 248 { 00750, AID_ROOT, AID_SHELL, (1 << CAP_SETUID) | (1 << CAP_SETGID), "system/bin/run-as" }, 249 250 { 00755, AID_ROOT, AID_SHELL, 0, "system/bin/*" }, 251 { 00755, AID_ROOT, AID_ROOT, 0, "system/lib/valgrind/*" }, 252 { 00755, AID_ROOT, AID_SHELL, 0, "system/xbin/*" }, 253 { 00755, AID_ROOT, AID_SHELL, 0, "system/vendor/bin/*" }, 254 { 00755, AID_ROOT, AID_SHELL, 0, "vendor/bin/*" }, 255 { 00750, AID_ROOT, AID_SHELL, 0, "sbin/*" }, 256 { 00755, AID_ROOT, AID_ROOT, 0, "bin/*" }, 257 { 00750, AID_ROOT, AID_SHELL, 0, "init*" }, 258 { 00750, AID_ROOT, AID_SHELL, 0, "charger*" }, 259 { 00750, AID_ROOT, AID_SHELL, 0, "sbin/fs_mgr" }, 260 { 00640, AID_ROOT, AID_SHELL, 0, "fstab.*" }, 261 { 00644, AID_ROOT, AID_ROOT, 0, 0 }, 262 }; 263 264 static inline void fs_config(const char *path, int dir, 265 unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities) 266 { 267 const struct fs_path_config *pc; 268 int plen; 269 270 if (path[0] == '/') { 271 path++; 272 } 273 274 pc = dir ? android_dirs : android_files; 275 plen = strlen(path); 276 for(; pc->prefix; pc++){ 277 int len = strlen(pc->prefix); 278 if (dir) { 279 if(plen < len) continue; 280 if(!strncmp(pc->prefix, path, len)) break; 281 continue; 282 } 283 /* If name ends in * then allow partial matches. */ 284 if (pc->prefix[len -1] == '*') { 285 if(!strncmp(pc->prefix, path, len - 1)) break; 286 } else if (plen == len){ 287 if(!strncmp(pc->prefix, path, len)) break; 288 } 289 } 290 *uid = pc->uid; 291 *gid = pc->gid; 292 *mode = (*mode & (~07777)) | pc->mode; 293 *capabilities = pc->capabilities; 294 295 #if 0 296 fprintf(stderr,"< '%s' '%s' %d %d %o >\n", 297 path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode); 298 #endif 299 } 300 #endif 301 #endif 302
