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 63 #define APP_SUBDIR "app/" // sub-directory under ANDROID_DATA 64 65 #define APP_LIB_SUBDIR "app-lib/" // sub-directory under ANDROID_DATA 66 67 #define MEDIA_SUBDIR "media/" // sub-directory under ANDROID_DATA 68 69 /* other handy constants */ 70 71 #define PRIVATE_APP_SUBDIR "app-private/" // sub-directory under ANDROID_DATA 72 73 #define DALVIK_CACHE_PREFIX "/data/dalvik-cache/" 74 #define DALVIK_CACHE_POSTFIX "/classes.dex" 75 76 #define UPDATE_COMMANDS_DIR_PREFIX "/system/etc/updatecmds/" 77 78 #define PKG_NAME_MAX 128 /* largest allowed package name */ 79 #define PKG_PATH_MAX 256 /* max size of any path we use */ 80 81 #define PER_USER_RANGE ((uid_t)100000) /* range of uids per user 82 uid = persona * PER_USER_RANGE + appid */ 83 84 /* data structures */ 85 86 typedef struct { 87 char* path; 88 size_t len; 89 } dir_rec_t; 90 91 typedef struct { 92 size_t count; 93 dir_rec_t* dirs; 94 } dir_rec_array_t; 95 96 extern dir_rec_t android_app_dir; 97 extern dir_rec_t android_app_private_dir; 98 extern dir_rec_t android_app_lib_dir; 99 extern dir_rec_t android_data_dir; 100 extern dir_rec_t android_asec_dir; 101 extern dir_rec_t android_media_dir; 102 extern dir_rec_array_t android_system_dirs; 103 104 typedef struct cache_dir_struct { 105 struct cache_dir_struct* parent; 106 int32_t childCount; 107 int32_t hiddenCount; 108 int32_t deleted; 109 char name[]; 110 } cache_dir_t; 111 112 typedef struct { 113 cache_dir_t* dir; 114 time_t modTime; 115 char name[]; 116 } cache_file_t; 117 118 typedef struct { 119 size_t numDirs; 120 size_t availDirs; 121 cache_dir_t** dirs; 122 size_t numFiles; 123 size_t availFiles; 124 cache_file_t** files; 125 size_t numCollected; 126 void* memBlocks; 127 int8_t* curMemBlockAvail; 128 int8_t* curMemBlockEnd; 129 } cache_t; 130 131 /* util.c */ 132 133 int create_pkg_path_in_dir(char path[PKG_PATH_MAX], 134 const dir_rec_t* dir, 135 const char* pkgname, 136 const char* postfix); 137 138 int create_pkg_path(char path[PKG_PATH_MAX], 139 const char *pkgname, 140 const char *postfix, 141 uid_t persona); 142 143 int create_persona_path(char path[PKG_PATH_MAX], 144 uid_t persona); 145 146 int create_persona_media_path(char path[PKG_PATH_MAX], userid_t userid); 147 148 int create_move_path(char path[PKG_PATH_MAX], 149 const char* pkgname, 150 const char* leaf, 151 uid_t persona); 152 153 int is_valid_package_name(const char* pkgname); 154 155 int create_cache_path(char path[PKG_PATH_MAX], const char *src); 156 157 int delete_dir_contents(const char *pathname, 158 int also_delete_dir, 159 const char *ignore); 160 161 int delete_dir_contents_fd(int dfd, const char *name); 162 163 int lookup_media_dir(char basepath[PATH_MAX], const char *dir); 164 165 int64_t data_disk_free(); 166 167 cache_t* start_cache_collection(); 168 169 void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir); 170 171 void clear_cache_files(cache_t* cache, int64_t free_size); 172 173 void finish_cache_collection(cache_t* cache); 174 175 int validate_system_app_path(const char* path); 176 177 int get_path_from_env(dir_rec_t* rec, const char* var); 178 179 int get_path_from_string(dir_rec_t* rec, const char* path); 180 181 int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix); 182 183 int validate_apk_path(const char *path); 184 185 int append_and_increment(char** dst, const char* src, size_t* dst_size); 186 187 char *build_string2(char *s1, char *s2); 188 char *build_string3(char *s1, char *s2, char *s3); 189 190 int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid); 191 int ensure_media_user_dirs(userid_t userid); 192 193 /* commands.c */ 194 195 int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo); 196 int uninstall(const char *pkgname, uid_t persona); 197 int renamepkg(const char *oldpkgname, const char *newpkgname); 198 int fix_uid(const char *pkgname, uid_t uid, gid_t gid); 199 int delete_user_data(const char *pkgname, uid_t persona); 200 int make_user_data(const char *pkgname, uid_t uid, uid_t persona); 201 int delete_persona(uid_t persona); 202 int delete_cache(const char *pkgname, uid_t persona); 203 int move_dex(const char *src, const char *dst); 204 int rm_dex(const char *path); 205 int protect(char *pkgname, gid_t gid); 206 int get_size(const char *pkgname, int persona, const char *apkpath, const char *libdirpath, 207 const char *fwdlock_apkpath, const char *asecpath, int64_t *codesize, 208 int64_t *datasize, int64_t *cachesize, int64_t *asecsize); 209 int free_cache(int64_t free_size); 210 int dexopt(const char *apk_path, uid_t uid, int is_public); 211 int movefiles(); 212 int linklib(const char* target, const char* source, int userId); 213