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 35 #include <cutils/fs.h> 36 #include <cutils/sockets.h> 37 #include <cutils/log.h> 38 #include <cutils/properties.h> 39 #include <cutils/multiuser.h> 40 41 #include <private/android_filesystem_config.h> 42 43 #if INCLUDE_SYS_MOUNT_FOR_STATFS 44 #include <sys/mount.h> 45 #else 46 #include <sys/statfs.h> 47 #endif 48 49 #define SOCKET_PATH "installd" 50 51 52 /* elements combined with a valid package name to form paths */ 53 54 #define PRIMARY_USER_PREFIX "data/" 55 #define SECONDARY_USER_PREFIX "user/" 56 57 #define PKG_DIR_POSTFIX "" 58 59 #define PKG_LIB_POSTFIX "/lib" 60 61 #define CACHE_DIR_POSTFIX "/cache" 62 #define CODE_CACHE_DIR_POSTFIX "/code_cache" 63 64 #define APP_SUBDIR "app/" // sub-directory under ANDROID_DATA 65 #define PRIV_APP_SUBDIR "priv-app/" // sub-directory under ANDROID_DATA 66 67 #define APP_LIB_SUBDIR "app-lib/" // sub-directory under ANDROID_DATA 68 69 #define MEDIA_SUBDIR "media/" // sub-directory under ANDROID_DATA 70 71 /* other handy constants */ 72 73 #define PRIVATE_APP_SUBDIR "app-private/" // sub-directory under ANDROID_DATA 74 75 #define DALVIK_CACHE_PREFIX "/data/dalvik-cache/" 76 #define DALVIK_CACHE_POSTFIX "/classes.dex" 77 78 #define UPDATE_COMMANDS_DIR_PREFIX "/system/etc/updatecmds/" 79 80 #define IDMAP_PREFIX "/data/resource-cache/" 81 #define IDMAP_SUFFIX "@idmap" 82 83 #define PKG_NAME_MAX 128 /* largest allowed package name */ 84 #define PKG_PATH_MAX 256 /* max size of any path we use */ 85 86 /* data structures */ 87 88 typedef struct { 89 char* path; 90 size_t len; 91 } dir_rec_t; 92 93 typedef struct { 94 size_t count; 95 dir_rec_t* dirs; 96 } dir_rec_array_t; 97 98 extern dir_rec_t android_app_dir; 99 extern dir_rec_t android_app_private_dir; 100 extern dir_rec_t android_app_lib_dir; 101 extern dir_rec_t android_data_dir; 102 extern dir_rec_t android_asec_dir; 103 extern dir_rec_t android_media_dir; 104 extern dir_rec_array_t android_system_dirs; 105 106 typedef struct cache_dir_struct { 107 struct cache_dir_struct* parent; 108 int32_t childCount; 109 int32_t hiddenCount; 110 int32_t deleted; 111 char name[]; 112 } cache_dir_t; 113 114 typedef struct { 115 cache_dir_t* dir; 116 time_t modTime; 117 char name[]; 118 } cache_file_t; 119 120 typedef struct { 121 size_t numDirs; 122 size_t availDirs; 123 cache_dir_t** dirs; 124 size_t numFiles; 125 size_t availFiles; 126 cache_file_t** files; 127 size_t numCollected; 128 void* memBlocks; 129 int8_t* curMemBlockAvail; 130 int8_t* curMemBlockEnd; 131 } cache_t; 132 133 /* util.c */ 134 135 int create_pkg_path_in_dir(char path[PKG_PATH_MAX], 136 const dir_rec_t* dir, 137 const char* pkgname, 138 const char* postfix); 139 140 int create_pkg_path(char path[PKG_PATH_MAX], 141 const char *pkgname, 142 const char *postfix, 143 userid_t userid); 144 145 int create_user_path(char path[PKG_PATH_MAX], 146 userid_t userid); 147 148 int create_user_media_path(char path[PKG_PATH_MAX], userid_t userid); 149 150 int create_user_config_path(char path[PKG_PATH_MAX], userid_t userid); 151 152 int create_move_path(char path[PKG_PATH_MAX], 153 const char* pkgname, 154 const char* leaf, 155 userid_t userid); 156 157 int is_valid_package_name(const char* pkgname); 158 159 int create_cache_path(char path[PKG_PATH_MAX], const char *src, 160 const char *instruction_set); 161 162 int delete_dir_contents(const char *pathname, 163 int also_delete_dir, 164 int (*exclusion_predicate)(const char *name, const int is_dir)); 165 166 int delete_dir_contents_fd(int dfd, const char *name); 167 168 int copy_dir_files(const char *srcname, const char *dstname, uid_t owner, gid_t group); 169 170 int lookup_media_dir(char basepath[PATH_MAX], const char *dir); 171 172 int64_t data_disk_free(); 173 174 cache_t* start_cache_collection(); 175 176 void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir); 177 178 void clear_cache_files(cache_t* cache, int64_t free_size); 179 180 void finish_cache_collection(cache_t* cache); 181 182 int validate_system_app_path(const char* path); 183 184 int get_path_from_env(dir_rec_t* rec, const char* var); 185 186 int get_path_from_string(dir_rec_t* rec, const char* path); 187 188 int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix); 189 190 int validate_apk_path(const char *path); 191 192 int append_and_increment(char** dst, const char* src, size_t* dst_size); 193 194 char *build_string2(char *s1, char *s2); 195 char *build_string3(char *s1, char *s2, char *s3); 196 197 int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid); 198 int ensure_media_user_dirs(userid_t userid); 199 int ensure_config_user_dirs(userid_t userid); 200 int create_profile_file(const char *pkgname, gid_t gid); 201 void remove_profile_file(const char *pkgname); 202 203 /* commands.c */ 204 205 int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo); 206 int uninstall(const char *pkgname, userid_t userid); 207 int renamepkg(const char *oldpkgname, const char *newpkgname); 208 int fix_uid(const char *pkgname, uid_t uid, gid_t gid); 209 int delete_user_data(const char *pkgname, userid_t userid); 210 int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo); 211 int make_user_config(userid_t userid); 212 int delete_user(userid_t userid); 213 int delete_cache(const char *pkgname, userid_t userid); 214 int delete_code_cache(const char *pkgname, userid_t userid); 215 int move_dex(const char *src, const char *dst, const char *instruction_set); 216 int rm_dex(const char *path, const char *instruction_set); 217 int protect(char *pkgname, gid_t gid); 218 int get_size(const char *pkgname, userid_t userid, const char *apkpath, const char *libdirpath, 219 const char *fwdlock_apkpath, const char *asecpath, const char *instruction_set, 220 int64_t *codesize, int64_t *datasize, int64_t *cachesize, int64_t *asecsize); 221 int free_cache(int64_t free_size); 222 int dexopt(const char *apk_path, uid_t uid, bool is_public, const char *pkgName, 223 const char *instruction_set, bool vm_safe_mode, bool should_relocate); 224 int movefiles(); 225 int linklib(const char* target, const char* source, int userId); 226 int idmap(const char *target_path, const char *overlay_path, uid_t uid); 227 int restorecon_data(); 228
