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 #ifndef UTILS_H_ 19 #define UTILS_H_ 20 21 #include <string> 22 #include <vector> 23 24 #include <dirent.h> 25 #include <inttypes.h> 26 #include <unistd.h> 27 #include <utime.h> 28 29 #include <cutils/multiuser.h> 30 31 #include <installd_constants.h> 32 33 namespace android { 34 namespace installd { 35 36 struct dir_rec_t; 37 38 typedef struct cache_dir_struct { 39 struct cache_dir_struct* parent; 40 int32_t childCount; 41 int32_t hiddenCount; 42 int32_t deleted; 43 char name[]; 44 } cache_dir_t; 45 46 typedef struct { 47 cache_dir_t* dir; 48 time_t modTime; 49 char name[]; 50 } cache_file_t; 51 52 typedef struct { 53 size_t numDirs; 54 size_t availDirs; 55 cache_dir_t** dirs; 56 size_t numFiles; 57 size_t availFiles; 58 cache_file_t** files; 59 size_t numCollected; 60 void* memBlocks; 61 int8_t* curMemBlockAvail; 62 int8_t* curMemBlockEnd; 63 } cache_t; 64 65 constexpr const char* kXattrInodeCache = "user.inode_cache"; 66 constexpr const char* kXattrInodeCodeCache = "user.inode_code_cache"; 67 68 int create_pkg_path(char path[PKG_PATH_MAX], 69 const char *pkgname, 70 const char *postfix, 71 userid_t userid); 72 73 std::string create_data_path(const char* volume_uuid); 74 75 std::string create_data_app_path(const char* volume_uuid); 76 77 std::string create_data_app_package_path(const char* volume_uuid, const char* package_name); 78 79 std::string create_data_user_ce_path(const char* volume_uuid, userid_t userid); 80 std::string create_data_user_de_path(const char* volume_uuid, userid_t userid); 81 82 std::string create_data_user_ce_package_path(const char* volume_uuid, 83 userid_t user, const char* package_name); 84 std::string create_data_user_ce_package_path(const char* volume_uuid, 85 userid_t user, const char* package_name, ino_t ce_data_inode); 86 std::string create_data_user_de_package_path(const char* volume_uuid, 87 userid_t user, const char* package_name); 88 89 std::string create_data_media_path(const char* volume_uuid, userid_t userid); 90 91 std::string create_data_misc_legacy_path(userid_t userid); 92 93 std::string create_data_user_profiles_path(userid_t userid); 94 std::string create_data_user_profile_package_path(userid_t user, const char* package_name); 95 std::string create_data_ref_profile_package_path(const char* package_name); 96 97 std::vector<userid_t> get_known_users(const char* volume_uuid); 98 99 int create_user_config_path(char path[PKG_PATH_MAX], userid_t userid); 100 101 int create_move_path(char path[PKG_PATH_MAX], 102 const char* pkgname, 103 const char* leaf, 104 userid_t userid); 105 106 int is_valid_package_name(const char* pkgname); 107 108 int delete_dir_contents(const std::string& pathname, bool ignore_if_missing = false); 109 int delete_dir_contents_and_dir(const std::string& pathname, bool ignore_if_missing = false); 110 111 int delete_dir_contents(const char *pathname, 112 int also_delete_dir, 113 int (*exclusion_predicate)(const char *name, const int is_dir), 114 bool ignore_if_missing = false); 115 116 int delete_dir_contents_fd(int dfd, const char *name); 117 118 int copy_dir_files(const char *srcname, const char *dstname, uid_t owner, gid_t group); 119 120 int64_t data_disk_free(const std::string& data_path); 121 122 cache_t* start_cache_collection(); 123 124 int get_path_inode(const std::string& path, ino_t *inode); 125 126 int write_path_inode(const std::string& parent, const char* name, const char* inode_xattr); 127 std::string read_path_inode(const std::string& parent, const char* name, const char* inode_xattr); 128 129 void add_cache_files(cache_t* cache, const std::string& data_path); 130 131 void clear_cache_files(const std::string& data_path, cache_t* cache, int64_t free_size); 132 133 void finish_cache_collection(cache_t* cache); 134 135 int validate_system_app_path(const char* path); 136 137 int get_path_from_env(dir_rec_t* rec, const char* var); 138 139 int get_path_from_string(dir_rec_t* rec, const char* path); 140 141 int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix); 142 143 int validate_apk_path(const char *path); 144 int validate_apk_path_subdirs(const char *path); 145 146 int append_and_increment(char** dst, const char* src, size_t* dst_size); 147 148 char *build_string2(const char *s1, const char *s2); 149 char *build_string3(const char *s1, const char *s2, const char *s3); 150 151 int ensure_config_user_dirs(userid_t userid); 152 153 int wait_child(pid_t pid); 154 155 } // namespace installd 156 } // namespace android 157 158 #endif // UTILS_H_ 159