installd.h revision 8ea0dc6a89b011d4f478c0c8192570d69cf7ce79
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 MEDIA_SUBDIR           "media/" // sub-directory under ANDROID_DATA
66
67/* other handy constants */
68
69#define PRIVATE_APP_SUBDIR     "app-private/" // sub-directory under ANDROID_DATA
70
71#define DALVIK_CACHE_PREFIX    "/data/dalvik-cache/"
72#define DALVIK_CACHE_POSTFIX   "/classes.dex"
73
74#define UPDATE_COMMANDS_DIR_PREFIX  "/system/etc/updatecmds/"
75
76#define PKG_NAME_MAX  128   /* largest allowed package name */
77#define PKG_PATH_MAX  256   /* max size of any path we use */
78
79#define PER_USER_RANGE ((uid_t)100000)   /* range of uids per user
80                                            uid = persona * PER_USER_RANGE + appid */
81
82/* data structures */
83
84typedef struct {
85    char* path;
86    size_t len;
87} dir_rec_t;
88
89typedef struct {
90    size_t count;
91    dir_rec_t* dirs;
92} dir_rec_array_t;
93
94extern dir_rec_t android_app_dir;
95extern dir_rec_t android_app_private_dir;
96extern dir_rec_t android_data_dir;
97extern dir_rec_t android_asec_dir;
98extern dir_rec_t android_media_dir;
99extern dir_rec_array_t android_system_dirs;
100
101typedef struct cache_dir_struct {
102    struct cache_dir_struct* parent;
103    int32_t childCount;
104    int32_t hiddenCount;
105    int32_t deleted;
106    char name[];
107} cache_dir_t;
108
109typedef struct {
110    cache_dir_t* dir;
111    time_t modTime;
112    char name[];
113} cache_file_t;
114
115typedef struct {
116    size_t numDirs;
117    size_t availDirs;
118    cache_dir_t** dirs;
119    size_t numFiles;
120    size_t availFiles;
121    cache_file_t** files;
122    size_t numCollected;
123    void* memBlocks;
124    int8_t* curMemBlockAvail;
125    int8_t* curMemBlockEnd;
126} cache_t;
127
128/* util.c */
129
130int create_pkg_path_in_dir(char path[PKG_PATH_MAX],
131                                const dir_rec_t* dir,
132                                const char* pkgname,
133                                const char* postfix);
134
135int create_pkg_path(char path[PKG_PATH_MAX],
136                    const char *pkgname,
137                    const char *postfix,
138                    uid_t persona);
139
140int create_persona_path(char path[PKG_PATH_MAX],
141                    uid_t persona);
142
143int create_persona_media_path(char path[PKG_PATH_MAX], userid_t userid);
144
145int create_move_path(char path[PKG_PATH_MAX],
146                     const char* pkgname,
147                     const char* leaf,
148                     uid_t persona);
149
150int is_valid_package_name(const char* pkgname);
151
152int create_cache_path(char path[PKG_PATH_MAX], const char *src);
153
154int delete_dir_contents(const char *pathname,
155                        int also_delete_dir,
156                        const char *ignore);
157
158int delete_dir_contents_fd(int dfd, const char *name);
159
160int lookup_media_dir(char basepath[PATH_MAX], const char *dir);
161
162int64_t data_disk_free();
163
164cache_t* start_cache_collection();
165
166void add_cache_files(cache_t* cache, const char *basepath, const char *cachedir);
167
168void clear_cache_files(cache_t* cache, int64_t free_size);
169
170void finish_cache_collection(cache_t* cache);
171
172int validate_system_app_path(const char* path);
173
174int get_path_from_env(dir_rec_t* rec, const char* var);
175
176int get_path_from_string(dir_rec_t* rec, const char* path);
177
178int copy_and_append(dir_rec_t* dst, const dir_rec_t* src, const char* suffix);
179
180int validate_apk_path(const char *path);
181
182int append_and_increment(char** dst, const char* src, size_t* dst_size);
183
184char *build_string2(char *s1, char *s2);
185char *build_string3(char *s1, char *s2, char *s3);
186
187int ensure_dir(const char* path, mode_t mode, uid_t uid, gid_t gid);
188
189/* commands.c */
190
191int install(const char *pkgname, uid_t uid, gid_t gid);
192int uninstall(const char *pkgname, uid_t persona);
193int renamepkg(const char *oldpkgname, const char *newpkgname);
194int fix_uid(const char *pkgname, uid_t uid, gid_t gid);
195int delete_user_data(const char *pkgname, uid_t persona);
196int make_user_data(const char *pkgname, uid_t uid, uid_t persona);
197int delete_persona(uid_t persona);
198int clone_persona_data(uid_t src_persona, uid_t target_persona, int copy);
199int delete_cache(const char *pkgname);
200int move_dex(const char *src, const char *dst);
201int rm_dex(const char *path);
202int protect(char *pkgname, gid_t gid);
203int get_size(const char *pkgname, int persona, const char *apkpath, const char *fwdlock_apkpath,
204             const char *asecpath, int64_t *codesize, int64_t *datasize, int64_t *cachesize,
205             int64_t *asecsize);
206int free_cache(int64_t free_size);
207int dexopt(const char *apk_path, uid_t uid, int is_public);
208int movefiles();
209int linklib(const char* target, const char* source);
210int unlinklib(const char* libPath);
211