1 /* 2 ** 3 ** Copyright 2008, The Android Open Source Project 4 ** 5 ** Licensed under the Apache License, Version 2.0 (the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing, software 12 ** distributed under the License is distributed on an "AS IS" BASIS, 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 #define LOG_TAG "installd" 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <stdint.h> 23 #include <inttypes.h> 24 #include <sys/stat.h> 25 #include <dirent.h> 26 #include <unistd.h> 27 #include <ctype.h> 28 #include <fcntl.h> 29 #include <errno.h> 30 #include <utime.h> 31 #include <sys/socket.h> 32 #include <sys/types.h> 33 #include <sys/wait.h> 34 #include <string> 35 #include <vector> 36 37 #include <cutils/fs.h> 38 #include <cutils/sockets.h> 39 #include <cutils/log.h> 40 #include <cutils/properties.h> 41 #include <cutils/multiuser.h> 42 43 #include <private/android_filesystem_config.h> 44 45 #if defined(__APPLE__) 46 #include <sys/mount.h> 47 #else 48 #include <sys/statfs.h> 49 #endif 50 51 #define SOCKET_PATH "installd" 52 53 54 /* elements combined with a valid package name to form paths */ 55 56 #define PRIMARY_USER_PREFIX "data/" 57 #define SECONDARY_USER_PREFIX "user/" 58 59 #define PKG_DIR_POSTFIX "" 60 61 #define PKG_LIB_POSTFIX "/lib" 62 63 #define CACHE_DIR_POSTFIX "/cache" 64 #define CODE_CACHE_DIR_POSTFIX "/code_cache" 65 66 #define APP_SUBDIR "app/" // sub-directory under ANDROID_DATA 67 #define PRIV_APP_SUBDIR "priv-app/" // sub-directory under ANDROID_DATA 68 69 #define APP_LIB_SUBDIR "app-lib/" // sub-directory under ANDROID_DATA 70 71 #define MEDIA_SUBDIR "media/" // sub-directory under ANDROID_DATA 72 73 /* other handy constants */ 74 75 #define PRIVATE_APP_SUBDIR "app-private/" // sub-directory under ANDROID_DATA 76 77 #define DALVIK_CACHE_PREFIX "/data/dalvik-cache/" 78 #define DALVIK_CACHE_POSTFIX "/classes.dex" 79 80 #define UPDATE_COMMANDS_DIR_PREFIX "/system/etc/updatecmds/" 81 82 #define IDMAP_PREFIX "/data/resource-cache/" 83 #define IDMAP_SUFFIX "@idmap" 84 85 #define PKG_NAME_MAX 128 /* largest allowed package name */ 86 #define PKG_PATH_MAX 256 /* max size of any path we use */ 87 88 /* dexopt needed flags matching those in dalvik.system.DexFile */ 89 #define DEXOPT_DEX2OAT_NEEDED 1 90 #define DEXOPT_PATCHOAT_NEEDED 2 91 #define DEXOPT_SELF_PATCHOAT_NEEDED 3 92 93 #define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a))) 94 95 /* data structures */ 96 97 typedef struct { 98 char* path; 99 size_t len; 100 } dir_rec_t; 101 102 typedef struct { 103 size_t count; 104 dir_rec_t* dirs; 105 } dir_rec_array_t; 106 107 extern dir_rec_t android_app_dir; 108 extern dir_rec_t android_app_private_dir; 109 extern dir_rec_t android_app_lib_dir; 110 extern dir_rec_t android_data_dir; 111 extern dir_rec_t android_asec_dir; 112 extern dir_rec_t android_media_dir; 113 extern dir_rec_t android_mnt_expand_dir; 114 extern dir_rec_array_t android_system_dirs; 115 116 typedef struct cache_dir_struct { 117 struct cache_dir_struct* parent; 118 int32_t childCount; 119 int32_t hiddenCount; 120 int32_t deleted; 121 char name[]; 122 } cache_dir_t; 123 124 typedef struct { 125 cache_dir_t* dir; 126 time_t modTime; 127 char name[]; 128 } cache_file_t; 129 130 typedef struct { 131 size_t numDirs; 132 size_t availDirs; 133 cache_dir_t** dirs; 134 size_t numFiles; 135 size_t availFiles; 136 cache_file_t** files; 137 size_t numCollected; 138 void* memBlocks; 139 int8_t* curMemBlockAvail; 140 int8_t* curMemBlockEnd; 141 } cache_t; 142 143 /* util.c */ 144 145 int create_pkg_path(char path[PKG_PATH_MAX], 146 const char *pkgname, 147 const char *postfix, 148 userid_t userid); 149 150 std::string create_data_path(const char* volume_uuid); 151 152 std::string create_data_app_path(const char* volume_uuid); 153 154 std::string create_data_app_package_path(const char* volume_uuid, const char* package_name); 155 156 std::string create_data_user_path(const char* volume_uuid, userid_t userid); 157 158 std::string create_data_user_package_path(const char* volume_uuid, 159 userid_t user, const char* package_name); 160 161 std::string create_data_media_path(const char* volume_uuid, userid_t userid); 162 163 std::vector<userid_t> get_known_users(const char* volume_uuid); 164 165 int create_user_config_path(char path[PKG_PATH_MAX], userid_t userid); 166 167 int create_move_path(char path[PKG_PATH_MAX], 168 const char* pkgname, 169 const char* leaf, 170 userid_t userid); 171 172 int is_valid_package_name(const char* pkgname); 173 174 int create_cache_path(char path[PKG_PATH_MAX], const char *src, 175 const char *instruction_set); 176 177 int delete_dir_contents(const char *pathname, 178 int also_delete_dir, 179 int (*exclusion_predicate)(const char *name, const int is_dir)); 180 181 int delete_dir_contents_fd(int dfd, const char *name); 182 183 int copy_dir_files(const char *srcname, const char *dstname, uid_t owner, gid_t group); 184 185 int lookup_media_dir(char basepath[PATH_MAX], const char *dir); 186 187 int64_t data_disk_free(const std::string& data_path); 188 189 cache_t* start_cache_collection(); 190 191 void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir); 192 193 void clear_cache_files(const std::string& data_path, cache_t* cache, int64_t free_size); 194 195 void finish_cache_collection(cache_t* cache); 196 197 int validate_system_app_path(const char* path); 198 199 int get_path_from_env(dir_rec_t* rec, const char* var); 200 201 int get_path_from_string(dir_rec_t* rec, const char* path); 202 203 int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix); 204 205 int validate_apk_path(const char *path); 206 int validate_apk_path_subdirs(const char *path); 207 208 int append_and_increment(char** dst, const char* src, size_t* dst_size); 209 210 char *build_string2(const char *s1, const char *s2); 211 char *build_string3(const char *s1, const char *s2, const char *s3); 212 213 int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid); 214 int ensure_media_user_dirs(const char* uuid, userid_t userid); 215 int ensure_config_user_dirs(userid_t userid); 216 int create_profile_file(const char *pkgname, gid_t gid); 217 void remove_profile_file(const char *pkgname); 218 219 /* commands.c */ 220 221 int install(const char *uuid, const char *pkgname, uid_t uid, gid_t gid, const char *seinfo); 222 int uninstall(const char *uuid, const char *pkgname, userid_t userid); 223 int renamepkg(const char *oldpkgname, const char *newpkgname); 224 int fix_uid(const char *uuid, const char *pkgname, uid_t uid, gid_t gid); 225 int delete_user_data(const char *uuid, const char *pkgname, userid_t userid); 226 int make_user_data(const char *uuid, const char *pkgname, uid_t uid, 227 userid_t userid, const char* seinfo); 228 int copy_complete_app(const char* from_uuid, const char *to_uuid, 229 const char *package_name, const char *data_app_name, appid_t appid, 230 const char* seinfo); 231 int make_user_config(userid_t userid); 232 int delete_user(const char *uuid, userid_t userid); 233 int delete_cache(const char *uuid, const char *pkgname, userid_t userid); 234 int delete_code_cache(const char *uuid, const char *pkgname, userid_t userid); 235 int move_dex(const char *src, const char *dst, const char *instruction_set); 236 int rm_dex(const char *path, const char *instruction_set); 237 int protect(char *pkgname, gid_t gid); 238 int get_size(const char *uuid, const char *pkgname, int userid, 239 const char *apkpath, const char *libdirpath, 240 const char *fwdlock_apkpath, const char *asecpath, 241 const char *instruction_set, int64_t *codesize, int64_t *datasize, 242 int64_t *cachesize, int64_t *asecsize); 243 int free_cache(const char *uuid, int64_t free_size); 244 int dexopt(const char *apk_path, uid_t uid, bool is_public, const char *pkgName, 245 const char *instruction_set, int dexopt_needed, bool vm_safe_mode, 246 bool debuggable, const char* oat_dir); 247 int mark_boot_complete(const char *instruction_set); 248 int movefiles(); 249 int linklib(const char* uuid, const char* pkgname, const char* asecLibDir, int userId); 250 int idmap(const char *target_path, const char *overlay_path, uid_t uid); 251 int restorecon_data(const char *uuid, const char* pkgName, const char* seinfo, uid_t uid); 252 int create_oat_dir(const char* oat_dir, const char *instruction_set); 253 int rm_package_dir(const char* apk_path); 254 int calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path, 255 const char *instruction_set); 256 int move_package_dir(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path, 257 const char *instruction_set); 258 int link_file(const char *relative_path, const char *from_base, const char *to_base); 259
