installd.h revision 770180a4dd86f8bda6af2e6db4676e99a5bb1548 
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
88typedef struct {
89    char* path;
90    size_t len;
91} dir_rec_t;
92
93typedef struct {
94    size_t count;
95    dir_rec_t* dirs;
96} dir_rec_array_t;
97
98extern dir_rec_t android_app_dir;
99extern dir_rec_t android_app_private_dir;
100extern dir_rec_t android_app_lib_dir;
101extern dir_rec_t android_data_dir;
102extern dir_rec_t android_asec_dir;
103extern dir_rec_t android_media_dir;
104extern dir_rec_array_t android_system_dirs;
105
106typedef 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
114typedef struct {
115    cache_dir_t* dir;
116    time_t modTime;
117    char name[];
118} cache_file_t;
119
120typedef 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
135int 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
140int create_pkg_path(char path[PKG_PATH_MAX],
141                    const char *pkgname,
142                    const char *postfix,
143                    userid_t userid);
144
145int create_user_path(char path[PKG_PATH_MAX],
146                    userid_t userid);
147
148int create_user_media_path(char path[PKG_PATH_MAX], userid_t userid);
149
150int create_user_config_path(char path[PKG_PATH_MAX], userid_t userid);
151
152int create_move_path(char path[PKG_PATH_MAX],
153                     const char* pkgname,
154                     const char* leaf,
155                     userid_t userid);
156
157int is_valid_package_name(const char* pkgname);
158
159int create_cache_path(char path[PKG_PATH_MAX], const char *src,
160                      const char *instruction_set);
161
162int delete_dir_contents(const char *pathname,
163                        int also_delete_dir,
164                        int (*exclusion_predicate)(const char *name, const int is_dir));
165
166int delete_dir_contents_fd(int dfd, const char *name);
167
168int lookup_media_dir(char basepath[PATH_MAX], const char *dir);
169
170int64_t data_disk_free();
171
172cache_t* start_cache_collection();
173
174void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir);
175
176void clear_cache_files(cache_t* cache, int64_t free_size);
177
178void finish_cache_collection(cache_t* cache);
179
180int validate_system_app_path(const char* path);
181
182int get_path_from_env(dir_rec_t* rec, const char* var);
183
184int get_path_from_string(dir_rec_t* rec, const char* path);
185
186int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix);
187
188int validate_apk_path(const char *path);
189
190int append_and_increment(char** dst, const char* src, size_t* dst_size);
191
192char *build_string2(char *s1, char *s2);
193char *build_string3(char *s1, char *s2, char *s3);
194
195int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid);
196int ensure_media_user_dirs(userid_t userid);
197int ensure_config_user_dirs(userid_t userid);
198int create_profile_file(const char *pkgname, gid_t gid);
199void remove_profile_file(const char *pkgname);
200
201/* commands.c */
202
203int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo);
204int uninstall(const char *pkgname, userid_t userid);
205int renamepkg(const char *oldpkgname, const char *newpkgname);
206int fix_uid(const char *pkgname, uid_t uid, gid_t gid);
207int delete_user_data(const char *pkgname, userid_t userid);
208int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo);
209int make_user_config(userid_t userid);
210int delete_user(userid_t userid);
211int delete_cache(const char *pkgname, userid_t userid);
212int delete_code_cache(const char *pkgname, userid_t userid);
213int move_dex(const char *src, const char *dst, const char *instruction_set);
214int rm_dex(const char *path, const char *instruction_set);
215int protect(char *pkgname, gid_t gid);
216int get_size(const char *pkgname, userid_t userid, const char *apkpath, const char *libdirpath,
217             const char *fwdlock_apkpath, const char *asecpath, const char *instruction_set,
218             int64_t *codesize, int64_t *datasize, int64_t *cachesize, int64_t *asecsize);
219int free_cache(int64_t free_size);
220int dexopt(const char *apk_path, uid_t uid, bool is_public, const char *pkgName,
221           const char *instruction_set, bool vm_safe_mode, bool should_relocate);
222int movefiles();
223int linklib(const char* target, const char* source, int userId);
224int idmap(const char *target_path, const char *overlay_path, uid_t uid);
225int restorecon_data();
226