text: /*
   * Copyright (C) 2007 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /* This file is used to define the properties of the filesystem
  ** images generated by build tools (mkbootfs and mkyaffs2image) and
  ** by the device side of adb.
  */
  
  #ifndef _ANDROID_FILESYSTEM_CONFIG_H_
  #define _ANDROID_FILESYSTEM_CONFIG_H_
  
  #include <string.h>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <stdint.h>
  
  #ifdef HAVE_ANDROID_OS
  #include <linux/capability.h>
  #else
  #include "android_filesystem_capability.h"
  #endif
  
  /* This is the master Users and Groups config for the platform.
   * DO NOT EVER RENUMBER
   */
  
  #define AID_ROOT             0  /* traditional unix root user */
  
  #define AID_SYSTEM        1000  /* system server */
  
  #define AID_RADIO         1001  /* telephony subsystem, RIL */
  #define AID_BLUETOOTH     1002  /* bluetooth subsystem */
  #define AID_GRAPHICS      1003  /* graphics devices */
  #define AID_INPUT         1004  /* input devices */
  #define AID_AUDIO         1005  /* audio devices */
  #define AID_CAMERA        1006  /* camera devices */
  #define AID_LOG           1007  /* log devices */
  #define AID_COMPASS       1008  /* compass device */
  #define AID_MOUNT         1009  /* mountd socket */
  #define AID_WIFI          1010  /* wifi subsystem */
  #define AID_ADB           1011  /* android debug bridge (adbd) */
  #define AID_INSTALL       1012  /* group for installing packages */
  #define AID_MEDIA         1013  /* mediaserver process */
  #define AID_DHCP          1014  /* dhcp client */
  #define AID_SDCARD_RW     1015  /* external storage write access */
  #define AID_VPN           1016  /* vpn system */
  #define AID_KEYSTORE      1017  /* keystore subsystem */
  #define AID_USB           1018  /* USB devices */
  #define AID_DRM           1019  /* DRM server */
  #define AID_MDNSR         1020  /* MulticastDNSResponder (service discovery) */
  #define AID_GPS           1021  /* GPS daemon */
  #define AID_UNUSED1       1022  /* deprecated, DO NOT USE */
  #define AID_MEDIA_RW      1023  /* internal media storage write access */
  #define AID_MTP           1024  /* MTP USB driver access */
  #define AID_UNUSED2       1025  /* deprecated, DO NOT USE */
  #define AID_DRMRPC        1026  /* group for drm rpc */
  #define AID_NFC           1027  /* nfc subsystem */
  #define AID_SDCARD_R      1028  /* external storage read access */
  #define AID_CLAT          1029  /* clat part of nat464 */
  #define AID_LOOP_RADIO    1030  /* loop radio devices */
  #define AID_MEDIA_DRM     1031  /* MediaDrm plugins */
  #define AID_PACKAGE_INFO  1032  /* access to installed package details */
  #define AID_SDCARD_PICS   1033  /* external storage photos access */
  #define AID_SDCARD_AV     1034  /* external storage audio/video access */
  #define AID_SDCARD_ALL    1035  /* access all users external storage */
  #define AID_LOGD          1036  /* log daemon */
  #define AID_SHARED_RELRO  1037  /* creator of shared GNU RELRO files */
  
  #define AID_AUDIT         1049  /* audit daemon */
  
  #define AID_SHELL         2000  /* adb and debug shell user */
  #define AID_CACHE         2001  /* cache access */
  #define AID_DIAG          2002  /* access to diagnostic resources */
  
  /* The 3000 series are intended for use as supplemental group id's only.
   * They indicate special Android capabilities that the kernel is aware of. */
  #define AID_NET_BT_ADMIN  3001  /* bluetooth: create any socket */
  #define AID_NET_BT        3002  /* bluetooth: create sco, rfcomm or l2cap sockets */
  #define AID_INET          3003  /* can create AF_INET and AF_INET6 sockets */
  #define AID_NET_RAW       3004  /* can create raw INET sockets */
  #define AID_NET_ADMIN     3005  /* can configure interfaces and routing tables. */
  #define AID_NET_BW_STATS  3006  /* read bandwidth statistics */
  #define AID_NET_BW_ACCT   3007  /* change bandwidth statistics accounting */
  #define AID_NET_BT_STACK  3008  /* bluetooth: access config files */
  #if defined(QCOM_LEGACY_UIDS)
  #define AID_QCOM_ONCRPC   3009  /* can read/write /dev/oncrpc files */
  #define AID_QCOM_DIAG     3010  /* can read/write /dev/diag */
  #else 
  #define AID_QCOM_DIAG     3009  /* can read/write /dev/diag */
  #define AID_IMS           3010 /* can read/write /dev/socket/imsrtp */
  #define AID_SENSORS       3011 /* access to /dev/socket/sensor_ctl_socket & QCCI/QCSI */
  #endif
  
  #define AID_EVERYBODY     9997  /* shared between all apps in the same profile */
   
  #define AID_MISC          9998  /* access to misc storage */
  #define AID_NOBODY        9999
  
  #define AID_APP          10000  /* first app user */
  
  #define AID_ISOLATED_START 99000 /* start of uids for fully isolated sandboxed processes */
  #define AID_ISOLATED_END   99999 /* end of uids for fully isolated sandboxed processes */
  
  #define AID_USER        100000  /* offset for uid ranges for each user */
  
  #define AID_SHARED_GID_START 50000 /* start of gids for apps in each user to share */
  #define AID_SHARED_GID_END   59999 /* start of gids for apps in each user to share */
  
  #if !defined(EXCLUDE_FS_CONFIG_STRUCTURES)
  struct android_id_info {
      const char *name;
      unsigned aid;
  };
  
  static const struct android_id_info android_ids[] = {
      { "root",          AID_ROOT, },
  
      { "system",        AID_SYSTEM, },
  
      { "radio",         AID_RADIO, },
      { "bluetooth",     AID_BLUETOOTH, },
      { "graphics",      AID_GRAPHICS, },
      { "input",         AID_INPUT, },
      { "audio",         AID_AUDIO, },
      { "camera",        AID_CAMERA, },
      { "log",           AID_LOG, },
      { "compass",       AID_COMPASS, },
      { "mount",         AID_MOUNT, },
      { "wifi",          AID_WIFI, },
      { "adb",           AID_ADB, },
      { "install",       AID_INSTALL, },
      { "media",         AID_MEDIA, },
      { "dhcp",          AID_DHCP, },
      { "sdcard_rw",     AID_SDCARD_RW, },
      { "vpn",           AID_VPN, },
      { "keystore",      AID_KEYSTORE, },
      { "usb",           AID_USB, },
      { "drm",           AID_DRM, },
      { "mdnsr",         AID_MDNSR, },
      { "gps",           AID_GPS, },
      // AID_UNUSED1
      { "media_rw",      AID_MEDIA_RW, },
      { "mtp",           AID_MTP, },
      // AID_UNUSED2
      { "drmrpc",        AID_DRMRPC, },
      { "nfc",           AID_NFC, },
      { "sdcard_r",      AID_SDCARD_R, },
      { "clat",          AID_CLAT, },
      { "loop_radio",    AID_LOOP_RADIO, },
  #if defined(QCOM_LEGACY_UIDS)
      { "qcom_oncrpc",   AID_QCOM_ONCRPC, },
  #endif
      { "mediadrm",      AID_MEDIA_DRM, },
      { "package_info",  AID_PACKAGE_INFO, },
      { "sdcard_pics",   AID_SDCARD_PICS, },
      { "sdcard_av",     AID_SDCARD_AV, },
      { "sdcard_all",    AID_SDCARD_ALL, },
      { "logd",          AID_LOGD, },
      { "shared_relro",  AID_SHARED_RELRO, },
  
      { "audit",         AID_AUDIT, },
  
      { "shell",         AID_SHELL, },
      { "cache",         AID_CACHE, },
      { "diag",          AID_DIAG, },
  
      { "net_bt_admin",  AID_NET_BT_ADMIN, },
      { "net_bt",        AID_NET_BT, },
      { "inet",          AID_INET, },
      { "net_raw",       AID_NET_RAW, },
      { "net_admin",     AID_NET_ADMIN, },
      { "net_bw_stats",  AID_NET_BW_STATS, },
      { "qcom_diag", AID_QCOM_DIAG, },
  #if !defined(QCOM_LEGACY_UIDS)
      { "ims", AID_IMS, },
  #endif
      { "net_bw_acct",   AID_NET_BW_ACCT, },
      { "net_bt_stack",  AID_NET_BT_STACK, },
      { "qcom_diag", AID_QCOM_DIAG, },
  #if !defined(QCOM_LEGACY_UIDS)
      { "sensors",       AID_SENSORS, },
  #endif
      { "everybody",     AID_EVERYBODY, },
      { "misc",          AID_MISC, },
      { "nobody",        AID_NOBODY, },
  };
  
  #define android_id_count \
      (sizeof(android_ids) / sizeof(android_ids[0]))
  
  struct fs_path_config {
      unsigned mode;
      unsigned uid;
      unsigned gid;
      uint64_t capabilities;
      const char *prefix;
  };
  
  /* Rules for directories.
  ** These rules are applied based on "first match", so they
  ** should start with the most specific path and work their
  ** way up to the root.
  */
  
  static const struct fs_path_config android_dirs[] = {
      { 00770, AID_SYSTEM, AID_CACHE,  0, "cache" },
      { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app" },
      { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/app-private" },
      { 00771, AID_ROOT,   AID_ROOT,   0, "data/dalvik-cache" },
      { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data/data" },
      { 00771, AID_SHELL,  AID_SHELL,  0, "data/local/tmp" },
      { 00771, AID_SHELL,  AID_SHELL,  0, "data/local" },
      { 01771, AID_SYSTEM, AID_MISC,   0, "data/misc" },
      { 00770, AID_DHCP,   AID_DHCP,   0, "data/misc/dhcp" },
      { 00771, AID_SHARED_RELRO, AID_SHARED_RELRO, 0, "data/misc/shared_relro" },
      { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media" },
      { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" },
      { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" },
      { 00750, AID_ROOT,   AID_SHELL,  0, "sbin" },
      { 00755, AID_ROOT,   AID_SHELL,  0, "system/bin" },
      { 00755, AID_ROOT,   AID_SHELL,  0, "system/vendor" },
      { 00755, AID_ROOT,   AID_SHELL,  0, "system/xbin" },
      { 00755, AID_ROOT,   AID_ROOT,   0, "system/etc/ppp" },
      { 00755, AID_ROOT,   AID_SHELL,  0, "system/etc" },
      { 00755, AID_ROOT,   AID_SHELL,  0, "vendor" },
      { 00777, AID_ROOT,   AID_ROOT,   0, "sdcard" },
      { 00755, AID_ROOT,   AID_ROOT,   0, 0 },
  };
  
  /* Rules for files.
  ** These rules are applied based on "first match", so they
  ** should start with the most specific path and work their
  ** way up to the root. Prefixes ending in * denotes wildcard
  ** and will allow partial matches.
  */
  static const struct fs_path_config android_files[] = {
      { 00440, AID_ROOT,      AID_SHELL,     0, "system/etc/init.goldfish.rc" },
      { 00550, AID_ROOT,      AID_SHELL,     0, "system/etc/init.goldfish.sh" },
      { 00440, AID_ROOT,      AID_SHELL,     0, "system/etc/init.trout.rc" },
      { 00550, AID_ROOT,      AID_SHELL,     0, "system/etc/init.ril" },
      { 00550, AID_ROOT,      AID_SHELL,     0, "system/etc/init.testmenu" },
      { 00550, AID_DHCP,      AID_SHELL,     0, "system/etc/dhcpcd/dhcpcd-run-hooks" },
      { 00444, AID_RADIO,     AID_AUDIO,     0, "system/etc/AudioPara4.csv" },
      { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/ppp/*" },
      { 00555, AID_ROOT,      AID_ROOT,      0, "system/etc/rc.*" },
      { 00644, AID_SYSTEM,    AID_SYSTEM,    0, "data/app/*" },
      { 00644, AID_MEDIA_RW,  AID_MEDIA_RW,  0, "data/media/*" },
      { 00644, AID_SYSTEM,    AID_SYSTEM,    0, "data/app-private/*" },
      { 00644, AID_APP,       AID_APP,       0, "data/data/*" },
      { 00755, AID_ROOT,      AID_ROOT,      0, "system/bin/ping" },
  
      /* the following file is INTENTIONALLY set-gid and not set-uid.
       * Do not change. */
      { 02750, AID_ROOT,      AID_INET,      0, "system/bin/netcfg" },
  
      /* the following five files are INTENTIONALLY set-uid, but they
       * are NOT included on user builds. */
      { 04750, AID_ROOT,      AID_SHELL,     0, "system/xbin/su" },
      { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/librank" },
      { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/procrank" },
      { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/procmem" },
      { 06755, AID_ROOT,      AID_ROOT,      0, "system/xbin/tcpdump" },
      { 04770, AID_ROOT,      AID_RADIO,     0, "system/bin/pppd-ril" },
  
      /* the following files have enhanced capabilities and ARE included in user builds. */
      { 00750, AID_ROOT,      AID_SHELL,     (1 << CAP_SETUID) | (1 << CAP_SETGID), "system/bin/run-as" },
  
      { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/uncrypt" },
      { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/install-recovery.sh" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/*" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "system/etc/init.d/*" },
      { 00755, AID_ROOT,      AID_ROOT,      0, "system/lib/valgrind/*" },
      { 00755, AID_ROOT,      AID_ROOT,      0, "system/lib64/valgrind/*" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "system/xbin/*" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "system/vendor/bin/*" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "vendor/bin/*" },
      { 00750, AID_ROOT,      AID_SHELL,     0, "sbin/*" },
      { 00755, AID_ROOT,      AID_ROOT,      0, "bin/*" },
      { 00750, AID_ROOT,      AID_SHELL,     0, "init*" },
      { 00750, AID_ROOT,      AID_SHELL,     0, "sbin/fs_mgr" },
      { 00640, AID_ROOT,      AID_SHELL,     0, "fstab.*" },
      { 00755, AID_ROOT,      AID_SHELL,     0, "system/etc/init.d/*" },
      { 00644, AID_ROOT,      AID_ROOT,      0, 0 },
  };
  
  static inline void fs_config(const char *path, int dir,
                               unsigned *uid, unsigned *gid, unsigned *mode, uint64_t *capabilities)
  {
      const struct fs_path_config *pc;
      int plen;
  
      if (path[0] == '/') {
          path++;
      }
  
      pc = dir ? android_dirs : android_files;
      plen = strlen(path);
      for(; pc->prefix; pc++){
          int len = strlen(pc->prefix);
          if (dir) {
              if(plen < len) continue;
              if(!strncmp(pc->prefix, path, len)) break;
              continue;
          }
          /* If name ends in * then allow partial matches. */
          if (pc->prefix[len -1] == '*') {
              if(!strncmp(pc->prefix, path, len - 1)) break;
          } else if (plen == len){
              if(!strncmp(pc->prefix, path, len)) break;
          }
      }
      *uid = pc->uid;
      *gid = pc->gid;
      *mode = (*mode & (~07777)) | pc->mode;
      *capabilities = pc->capabilities;
  
  #if 0
      fprintf(stderr,"< '%s' '%s' %d %d %o >\n",
              path, pc->prefix ? pc->prefix : "", *uid, *gid, *mode);
  #endif
  }
  #endif
  #endif
  