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
86typedef struct {
87    char* path;
88    size_t len;
89} dir_rec_t;
90
91typedef struct {
92    size_t count;
93    dir_rec_t* dirs;
94} dir_rec_array_t;
95
96extern dir_rec_t android_app_dir;
97extern dir_rec_t android_app_private_dir;
98extern dir_rec_t android_app_lib_dir;
99extern dir_rec_t android_data_dir;
100extern dir_rec_t android_asec_dir;
101extern dir_rec_t android_media_dir;
102extern dir_rec_array_t android_system_dirs;
103
104typedef 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
112typedef struct {
113    cache_dir_t* dir;
114    time_t modTime;
115    char name[];
116} cache_file_t;
117
118typedef 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
133int 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
138int create_pkg_path(char path[PKG_PATH_MAX],
139                    const char *pkgname,
140                    const char *postfix,
141                    uid_t persona);
142
143int create_persona_path(char path[PKG_PATH_MAX],
144                    uid_t persona);
145
146int create_persona_media_path(char path[PKG_PATH_MAX], userid_t userid);
147
148int create_move_path(char path[PKG_PATH_MAX],
149                     const char* pkgname,
150                     const char* leaf,
151                     uid_t persona);
152
153int is_valid_package_name(const char* pkgname);
154
155int create_cache_path(char path[PKG_PATH_MAX], const char *src);
156
157int delete_dir_contents(const char *pathname,
158                        int also_delete_dir,
159                        const char *ignore);
160
161int delete_dir_contents_fd(int dfd, const char *name);
162
163int lookup_media_dir(char basepath[PATH_MAX], const char *dir);
164
165int64_t data_disk_free();
166
167cache_t* start_cache_collection();
168
169void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir);
170
171void clear_cache_files(cache_t* cache, int64_t free_size);
172
173void finish_cache_collection(cache_t* cache);
174
175int validate_system_app_path(const char* path);
176
177int get_path_from_env(dir_rec_t* rec, const char* var);
178
179int get_path_from_string(dir_rec_t* rec, const char* path);
180
181int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix);
182
183int validate_apk_path(const char *path);
184
185int append_and_increment(char** dst, const char* src, size_t* dst_size);
186
187char *build_string2(char *s1, char *s2);
188char *build_string3(char *s1, char *s2, char *s3);
189
190int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid);
191int ensure_media_user_dirs(userid_t userid);
192
193/* commands.c */
194
195int install(const char *pkgname, uid_t uid, gid_t gid);
196int uninstall(const char *pkgname, uid_t persona);
197int renamepkg(const char *oldpkgname, const char *newpkgname);
198int fix_uid(const char *pkgname, uid_t uid, gid_t gid);
199int delete_user_data(const char *pkgname, uid_t persona);
200int make_user_data(const char *pkgname, uid_t uid, uid_t persona);
201int delete_persona(uid_t persona);
202int clone_persona_data(uid_t src_persona, uid_t target_persona, int copy);
203int delete_cache(const char *pkgname, uid_t persona);
204int move_dex(const char *src, const char *dst);
205int rm_dex(const char *path);
206int protect(char *pkgname, gid_t gid);
207int get_size(const char *pkgname, int persona, const char *apkpath, const char *fwdlock_apkpath,
208             const char *asecpath, int64_t *codesize, int64_t *datasize, int64_t *cachesize,
209             int64_t *asecsize);
210int free_cache(int64_t free_size);
211int dexopt(const char *apk_path, uid_t uid, int is_public);
212int movefiles();
213int linklib(const char* target, const char* source, int userId);
214