1 /*
2 ** Copyright 2008, The Android Open Source Project
3 **
4 ** Licensed under the Apache License, Version 2.0 (the "License");
5 ** you may not use this file except in compliance with the License.
6 ** You may obtain a copy of the License at
7 **
8 ** http://www.apache.org/licenses/LICENSE-2.0
9 **
10 ** Unless required by applicable law or agreed to in writing, software
11 ** distributed under the License is distributed on an "AS IS" BASIS,
12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
15 */
16
17 #include "installd.h"
18
19 #include <base/stringprintf.h>
20 #include <base/logging.h>
21 #include <cutils/sched_policy.h>
22 #include <diskusage/dirsize.h>
23 #include <logwrap/logwrap.h>
24 #include <system/thread_defs.h>
25 #include <selinux/android.h>
26
27 #include <inttypes.h>
28 #include <sys/capability.h>
29 #include <sys/file.h>
30 #include <unistd.h>
31
32 using android::base::StringPrintf;
33
34 /* Directory records that are used in execution of commands. */
35 dir_rec_t android_data_dir;
36 dir_rec_t android_asec_dir;
37 dir_rec_t android_app_dir;
38 dir_rec_t android_app_private_dir;
39 dir_rec_t android_app_lib_dir;
40 dir_rec_t android_media_dir;
41 dir_rec_t android_mnt_expand_dir;
42 dir_rec_array_t android_system_dirs;
43
44 static const char* kCpPath = "/system/bin/cp";
45
install(const char * uuid,const char * pkgname,uid_t uid,gid_t gid,const char * seinfo)46 int install(const char *uuid, const char *pkgname, uid_t uid, gid_t gid, const char *seinfo)
47 {
48 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
49 ALOGE("invalid uid/gid: %d %d\n", uid, gid);
50 return -1;
51 }
52
53 std::string _pkgdir(create_data_user_package_path(uuid, 0, pkgname));
54 const char* pkgdir = _pkgdir.c_str();
55
56 if (mkdir(pkgdir, 0751) < 0) {
57 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
58 return -1;
59 }
60 if (chmod(pkgdir, 0751) < 0) {
61 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
62 unlink(pkgdir);
63 return -1;
64 }
65
66 if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
67 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
68 unlink(pkgdir);
69 return -errno;
70 }
71
72 if (chown(pkgdir, uid, gid) < 0) {
73 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
74 unlink(pkgdir);
75 return -1;
76 }
77
78 return 0;
79 }
80
uninstall(const char * uuid,const char * pkgname,userid_t userid)81 int uninstall(const char *uuid, const char *pkgname, userid_t userid)
82 {
83 std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname));
84 const char* pkgdir = _pkgdir.c_str();
85
86 remove_profile_file(pkgname);
87
88 /* delete contents AND directory, no exceptions */
89 return delete_dir_contents(pkgdir, 1, NULL);
90 }
91
renamepkg(const char * oldpkgname,const char * newpkgname)92 int renamepkg(const char *oldpkgname, const char *newpkgname)
93 {
94 char oldpkgdir[PKG_PATH_MAX];
95 char newpkgdir[PKG_PATH_MAX];
96
97 if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
98 return -1;
99 if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
100 return -1;
101
102 if (rename(oldpkgdir, newpkgdir) < 0) {
103 ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
104 return -errno;
105 }
106 return 0;
107 }
108
fix_uid(const char * uuid,const char * pkgname,uid_t uid,gid_t gid)109 int fix_uid(const char *uuid, const char *pkgname, uid_t uid, gid_t gid)
110 {
111 struct stat s;
112
113 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
114 ALOGE("invalid uid/gid: %d %d\n", uid, gid);
115 return -1;
116 }
117
118 std::string _pkgdir(create_data_user_package_path(uuid, 0, pkgname));
119 const char* pkgdir = _pkgdir.c_str();
120
121 if (stat(pkgdir, &s) < 0) return -1;
122
123 if (s.st_uid != 0 || s.st_gid != 0) {
124 ALOGE("fixing uid of non-root pkg: %s %" PRIu32 " %" PRIu32 "\n", pkgdir, s.st_uid, s.st_gid);
125 return -1;
126 }
127
128 if (chmod(pkgdir, 0751) < 0) {
129 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
130 unlink(pkgdir);
131 return -errno;
132 }
133 if (chown(pkgdir, uid, gid) < 0) {
134 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
135 unlink(pkgdir);
136 return -errno;
137 }
138
139 return 0;
140 }
141
delete_user_data(const char * uuid,const char * pkgname,userid_t userid)142 int delete_user_data(const char *uuid, const char *pkgname, userid_t userid)
143 {
144 std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname));
145 const char* pkgdir = _pkgdir.c_str();
146
147 return delete_dir_contents(pkgdir, 0, NULL);
148 }
149
make_user_data(const char * uuid,const char * pkgname,uid_t uid,userid_t userid,const char * seinfo)150 int make_user_data(const char *uuid, const char *pkgname, uid_t uid, userid_t userid, const char* seinfo)
151 {
152 std::string _pkgdir(create_data_user_package_path(uuid, userid, pkgname));
153 const char* pkgdir = _pkgdir.c_str();
154
155 if (mkdir(pkgdir, 0751) < 0) {
156 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
157 return -errno;
158 }
159 if (chmod(pkgdir, 0751) < 0) {
160 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
161 unlink(pkgdir);
162 return -errno;
163 }
164
165 if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) {
166 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
167 unlink(pkgdir);
168 return -errno;
169 }
170
171 if (chown(pkgdir, uid, uid) < 0) {
172 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
173 unlink(pkgdir);
174 return -errno;
175 }
176
177 return 0;
178 }
179
copy_complete_app(const char * from_uuid,const char * to_uuid,const char * package_name,const char * data_app_name,appid_t appid,const char * seinfo)180 int copy_complete_app(const char *from_uuid, const char *to_uuid,
181 const char *package_name, const char *data_app_name, appid_t appid,
182 const char* seinfo) {
183 std::vector<userid_t> users = get_known_users(from_uuid);
184
185 // Copy app
186 {
187 std::string from(create_data_app_package_path(from_uuid, data_app_name));
188 std::string to(create_data_app_package_path(to_uuid, data_app_name));
189 std::string to_parent(create_data_app_path(to_uuid));
190
191 char *argv[] = {
192 (char*) kCpPath,
193 (char*) "-F", /* delete any existing destination file first (--remove-destination) */
194 (char*) "-p", /* preserve timestamps, ownership, and permissions */
195 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
196 (char*) "-P", /* Do not follow symlinks [default] */
197 (char*) "-d", /* don't dereference symlinks */
198 (char*) from.c_str(),
199 (char*) to_parent.c_str()
200 };
201
202 LOG(DEBUG) << "Copying " << from << " to " << to;
203 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
204
205 if (rc != 0) {
206 LOG(ERROR) << "Failed copying " << from << " to " << to
207 << ": status " << rc;
208 goto fail;
209 }
210
211 if (selinux_android_restorecon(to.c_str(), SELINUX_ANDROID_RESTORECON_RECURSE) != 0) {
212 LOG(ERROR) << "Failed to restorecon " << to;
213 goto fail;
214 }
215 }
216
217 // Copy private data for all known users
218 for (auto user : users) {
219 std::string from(create_data_user_package_path(from_uuid, user, package_name));
220 std::string to(create_data_user_package_path(to_uuid, user, package_name));
221 std::string to_parent(create_data_user_path(to_uuid, user));
222
223 // Data source may not exist for all users; that's okay
224 if (access(from.c_str(), F_OK) != 0) {
225 LOG(INFO) << "Missing source " << from;
226 continue;
227 }
228
229 std::string user_path(create_data_user_path(to_uuid, user));
230 if (fs_prepare_dir(user_path.c_str(), 0771, AID_SYSTEM, AID_SYSTEM) != 0) {
231 LOG(ERROR) << "Failed to prepare user target " << user_path;
232 goto fail;
233 }
234
235 uid_t uid = multiuser_get_uid(user, appid);
236 if (make_user_data(to_uuid, package_name, uid, user, seinfo) != 0) {
237 LOG(ERROR) << "Failed to create package target " << to;
238 goto fail;
239 }
240
241 char *argv[] = {
242 (char*) kCpPath,
243 (char*) "-F", /* delete any existing destination file first (--remove-destination) */
244 (char*) "-p", /* preserve timestamps, ownership, and permissions */
245 (char*) "-R", /* recurse into subdirectories (DEST must be a directory) */
246 (char*) "-P", /* Do not follow symlinks [default] */
247 (char*) "-d", /* don't dereference symlinks */
248 (char*) from.c_str(),
249 (char*) to_parent.c_str()
250 };
251
252 LOG(DEBUG) << "Copying " << from << " to " << to;
253 int rc = android_fork_execvp(ARRAY_SIZE(argv), argv, NULL, false, true);
254
255 if (rc != 0) {
256 LOG(ERROR) << "Failed copying " << from << " to " << to
257 << ": status " << rc;
258 goto fail;
259 }
260 }
261
262 if (restorecon_data(to_uuid, package_name, seinfo, multiuser_get_uid(0, appid)) != 0) {
263 LOG(ERROR) << "Failed to restorecon";
264 goto fail;
265 }
266
267 // We let the framework scan the new location and persist that before
268 // deleting the data in the old location; this ordering ensures that
269 // we can recover from things like battery pulls.
270 return 0;
271
272 fail:
273 // Nuke everything we might have already copied
274 {
275 std::string to(create_data_app_package_path(to_uuid, data_app_name));
276 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
277 LOG(WARNING) << "Failed to rollback " << to;
278 }
279 }
280 for (auto user : users) {
281 std::string to(create_data_user_package_path(to_uuid, user, package_name));
282 if (delete_dir_contents(to.c_str(), 1, NULL) != 0) {
283 LOG(WARNING) << "Failed to rollback " << to;
284 }
285 }
286 return -1;
287 }
288
make_user_config(userid_t userid)289 int make_user_config(userid_t userid)
290 {
291 if (ensure_config_user_dirs(userid) == -1) {
292 return -1;
293 }
294
295 return 0;
296 }
297
delete_user(const char * uuid,userid_t userid)298 int delete_user(const char *uuid, userid_t userid)
299 {
300 int status = 0;
301
302 std::string data_path(create_data_user_path(uuid, userid));
303 if (delete_dir_contents(data_path.c_str(), 1, NULL) != 0) {
304 status = -1;
305 }
306
307 std::string media_path(create_data_media_path(uuid, userid));
308 if (delete_dir_contents(media_path.c_str(), 1, NULL) != 0) {
309 status = -1;
310 }
311
312 // Config paths only exist on internal storage
313 if (uuid == nullptr) {
314 char config_path[PATH_MAX];
315 if ((create_user_config_path(config_path, userid) != 0)
316 || (delete_dir_contents(config_path, 1, NULL) != 0)) {
317 status = -1;
318 }
319 }
320
321 return status;
322 }
323
delete_cache(const char * uuid,const char * pkgname,userid_t userid)324 int delete_cache(const char *uuid, const char *pkgname, userid_t userid)
325 {
326 std::string _cachedir(
327 create_data_user_package_path(uuid, userid, pkgname) + CACHE_DIR_POSTFIX);
328 const char* cachedir = _cachedir.c_str();
329
330 /* delete contents, not the directory, no exceptions */
331 return delete_dir_contents(cachedir, 0, NULL);
332 }
333
delete_code_cache(const char * uuid,const char * pkgname,userid_t userid)334 int delete_code_cache(const char *uuid, const char *pkgname, userid_t userid)
335 {
336 std::string _codecachedir(
337 create_data_user_package_path(uuid, userid, pkgname) + CODE_CACHE_DIR_POSTFIX);
338 const char* codecachedir = _codecachedir.c_str();
339
340 struct stat s;
341
342 /* it's okay if code cache is missing */
343 if (lstat(codecachedir, &s) == -1 && errno == ENOENT) {
344 return 0;
345 }
346
347 /* delete contents, not the directory, no exceptions */
348 return delete_dir_contents(codecachedir, 0, NULL);
349 }
350
351 /* Try to ensure free_size bytes of storage are available.
352 * Returns 0 on success.
353 * This is rather simple-minded because doing a full LRU would
354 * be potentially memory-intensive, and without atime it would
355 * also require that apps constantly modify file metadata even
356 * when just reading from the cache, which is pretty awful.
357 */
free_cache(const char * uuid,int64_t free_size)358 int free_cache(const char *uuid, int64_t free_size)
359 {
360 cache_t* cache;
361 int64_t avail;
362 DIR *d;
363 struct dirent *de;
364 char tmpdir[PATH_MAX];
365 char *dirpos;
366
367 std::string data_path(create_data_path(uuid));
368
369 avail = data_disk_free(data_path);
370 if (avail < 0) return -1;
371
372 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
373 if (avail >= free_size) return 0;
374
375 cache = start_cache_collection();
376
377 // Special case for owner on internal storage
378 if (uuid == nullptr) {
379 std::string _tmpdir(create_data_user_path(nullptr, 0));
380 add_cache_files(cache, _tmpdir.c_str(), "cache");
381 }
382
383 // Search for other users and add any cache files from them.
384 std::string _tmpdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX);
385 strcpy(tmpdir, _tmpdir.c_str());
386
387 dirpos = tmpdir + strlen(tmpdir);
388 d = opendir(tmpdir);
389 if (d != NULL) {
390 while ((de = readdir(d))) {
391 if (de->d_type == DT_DIR) {
392 const char *name = de->d_name;
393 /* always skip "." and ".." */
394 if (name[0] == '.') {
395 if (name[1] == 0) continue;
396 if ((name[1] == '.') && (name[2] == 0)) continue;
397 }
398 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
399 strcpy(dirpos, name);
400 //ALOGI("adding cache files from %s\n", tmpdir);
401 add_cache_files(cache, tmpdir, "cache");
402 } else {
403 ALOGW("Path exceeds limit: %s%s", tmpdir, name);
404 }
405 }
406 }
407 closedir(d);
408 }
409
410 // Collect cache files on external storage for all users (if it is mounted as part
411 // of the internal storage).
412 strcpy(tmpdir, android_media_dir.path);
413 dirpos = tmpdir + strlen(tmpdir);
414 d = opendir(tmpdir);
415 if (d != NULL) {
416 while ((de = readdir(d))) {
417 if (de->d_type == DT_DIR) {
418 const char *name = de->d_name;
419 /* skip any dir that doesn't start with a number, so not a user */
420 if (name[0] < '0' || name[0] > '9') {
421 continue;
422 }
423 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
424 strcpy(dirpos, name);
425 if (lookup_media_dir(tmpdir, "Android") == 0
426 && lookup_media_dir(tmpdir, "data") == 0) {
427 //ALOGI("adding cache files from %s\n", tmpdir);
428 add_cache_files(cache, tmpdir, "cache");
429 }
430 } else {
431 ALOGW("Path exceeds limit: %s%s", tmpdir, name);
432 }
433 }
434 }
435 closedir(d);
436 }
437
438 clear_cache_files(data_path, cache, free_size);
439 finish_cache_collection(cache);
440
441 return data_disk_free(data_path) >= free_size ? 0 : -1;
442 }
443
move_dex(const char * src,const char * dst,const char * instruction_set)444 int move_dex(const char *src, const char *dst, const char *instruction_set)
445 {
446 char src_dex[PKG_PATH_MAX];
447 char dst_dex[PKG_PATH_MAX];
448
449 if (validate_apk_path(src)) {
450 ALOGE("invalid apk path '%s' (bad prefix)\n", src);
451 return -1;
452 }
453 if (validate_apk_path(dst)) {
454 ALOGE("invalid apk path '%s' (bad prefix)\n", dst);
455 return -1;
456 }
457
458 if (create_cache_path(src_dex, src, instruction_set)) return -1;
459 if (create_cache_path(dst_dex, dst, instruction_set)) return -1;
460
461 ALOGV("move %s -> %s\n", src_dex, dst_dex);
462 if (rename(src_dex, dst_dex) < 0) {
463 ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
464 return -1;
465 } else {
466 return 0;
467 }
468 }
469
rm_dex(const char * path,const char * instruction_set)470 int rm_dex(const char *path, const char *instruction_set)
471 {
472 char dex_path[PKG_PATH_MAX];
473
474 if (validate_apk_path(path) && validate_system_app_path(path)) {
475 ALOGE("invalid apk path '%s' (bad prefix)\n", path);
476 return -1;
477 }
478
479 if (create_cache_path(dex_path, path, instruction_set)) return -1;
480
481 ALOGV("unlink %s\n", dex_path);
482 if (unlink(dex_path) < 0) {
483 if (errno != ENOENT) {
484 ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
485 }
486 return -1;
487 } else {
488 return 0;
489 }
490 }
491
get_size(const char * uuid,const char * pkgname,int userid,const char * apkpath,const char * libdirpath,const char * fwdlock_apkpath,const char * asecpath,const char * instruction_set,int64_t * _codesize,int64_t * _datasize,int64_t * _cachesize,int64_t * _asecsize)492 int get_size(const char *uuid, const char *pkgname, int userid, const char *apkpath,
493 const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath,
494 const char *instruction_set, int64_t *_codesize, int64_t *_datasize,
495 int64_t *_cachesize, int64_t* _asecsize)
496 {
497 DIR *d;
498 int dfd;
499 struct dirent *de;
500 struct stat s;
501 char path[PKG_PATH_MAX];
502
503 int64_t codesize = 0;
504 int64_t datasize = 0;
505 int64_t cachesize = 0;
506 int64_t asecsize = 0;
507
508 /* count the source apk as code -- but only if it's not
509 * on the /system partition and its not on the sdcard. */
510 if (validate_system_app_path(apkpath) &&
511 strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
512 if (stat(apkpath, &s) == 0) {
513 codesize += stat_size(&s);
514 if (S_ISDIR(s.st_mode)) {
515 d = opendir(apkpath);
516 if (d != NULL) {
517 dfd = dirfd(d);
518 codesize += calculate_dir_size(dfd);
519 closedir(d);
520 }
521 }
522 }
523 }
524
525 /* count the forward locked apk as code if it is given */
526 if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
527 if (stat(fwdlock_apkpath, &s) == 0) {
528 codesize += stat_size(&s);
529 }
530 }
531
532 /* count the cached dexfile as code */
533 if (!create_cache_path(path, apkpath, instruction_set)) {
534 if (stat(path, &s) == 0) {
535 codesize += stat_size(&s);
536 }
537 }
538
539 /* add in size of any libraries */
540 if (libdirpath != NULL && libdirpath[0] != '!') {
541 d = opendir(libdirpath);
542 if (d != NULL) {
543 dfd = dirfd(d);
544 codesize += calculate_dir_size(dfd);
545 closedir(d);
546 }
547 }
548
549 /* compute asec size if it is given */
550 if (asecpath != NULL && asecpath[0] != '!') {
551 if (stat(asecpath, &s) == 0) {
552 asecsize += stat_size(&s);
553 }
554 }
555
556 std::vector<userid_t> users;
557 if (userid == -1) {
558 users = get_known_users(uuid);
559 } else {
560 users.push_back(userid);
561 }
562
563 for (auto user : users) {
564 std::string _pkgdir(create_data_user_package_path(uuid, user, pkgname));
565 const char* pkgdir = _pkgdir.c_str();
566
567 d = opendir(pkgdir);
568 if (d == NULL) {
569 PLOG(WARNING) << "Failed to open " << pkgdir;
570 continue;
571 }
572 dfd = dirfd(d);
573
574 /* most stuff in the pkgdir is data, except for the "cache"
575 * directory and below, which is cache, and the "lib" directory
576 * and below, which is code...
577 */
578 while ((de = readdir(d))) {
579 const char *name = de->d_name;
580
581 if (de->d_type == DT_DIR) {
582 int subfd;
583 int64_t statsize = 0;
584 int64_t dirsize = 0;
585 /* always skip "." and ".." */
586 if (name[0] == '.') {
587 if (name[1] == 0) continue;
588 if ((name[1] == '.') && (name[2] == 0)) continue;
589 }
590 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
591 statsize = stat_size(&s);
592 }
593 subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
594 if (subfd >= 0) {
595 dirsize = calculate_dir_size(subfd);
596 }
597 if(!strcmp(name,"lib")) {
598 codesize += dirsize + statsize;
599 } else if(!strcmp(name,"cache")) {
600 cachesize += dirsize + statsize;
601 } else {
602 datasize += dirsize + statsize;
603 }
604 } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
605 // This is the symbolic link to the application's library
606 // code. We'll count this as code instead of data, since
607 // it is not something that the app creates.
608 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
609 codesize += stat_size(&s);
610 }
611 } else {
612 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
613 datasize += stat_size(&s);
614 }
615 }
616 }
617 closedir(d);
618 }
619 *_codesize = codesize;
620 *_datasize = datasize;
621 *_cachesize = cachesize;
622 *_asecsize = asecsize;
623 return 0;
624 }
625
create_cache_path(char path[PKG_PATH_MAX],const char * src,const char * instruction_set)626 int create_cache_path(char path[PKG_PATH_MAX], const char *src, const char *instruction_set)
627 {
628 char *tmp;
629 int srclen;
630 int dstlen;
631
632 srclen = strlen(src);
633
634 /* demand that we are an absolute path */
635 if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
636 return -1;
637 }
638
639 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX?
640 return -1;
641 }
642
643 dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
644 strlen(instruction_set) +
645 strlen(DALVIK_CACHE_POSTFIX) + 2;
646
647 if (dstlen > PKG_PATH_MAX) {
648 return -1;
649 }
650
651 sprintf(path,"%s%s/%s%s",
652 DALVIK_CACHE_PREFIX,
653 instruction_set,
654 src + 1, /* skip the leading / */
655 DALVIK_CACHE_POSTFIX);
656
657 for(tmp = path + strlen(DALVIK_CACHE_PREFIX) + strlen(instruction_set) + 1; *tmp; tmp++) {
658 if (*tmp == '/') {
659 *tmp = '@';
660 }
661 }
662
663 return 0;
664 }
665
split_count(const char * str)666 static int split_count(const char *str)
667 {
668 char *ctx;
669 int count = 0;
670 char buf[PROPERTY_VALUE_MAX];
671
672 strncpy(buf, str, sizeof(buf));
673 char *pBuf = buf;
674
675 while(strtok_r(pBuf, " ", &ctx) != NULL) {
676 count++;
677 pBuf = NULL;
678 }
679
680 return count;
681 }
682
split(char * buf,const char ** argv)683 static int split(char *buf, const char **argv)
684 {
685 char *ctx;
686 int count = 0;
687 char *tok;
688 char *pBuf = buf;
689
690 while((tok = strtok_r(pBuf, " ", &ctx)) != NULL) {
691 argv[count++] = tok;
692 pBuf = NULL;
693 }
694
695 return count;
696 }
697
run_patchoat(int input_fd,int oat_fd,const char * input_file_name,const char * output_file_name,const char * pkgname __unused,const char * instruction_set)698 static void run_patchoat(int input_fd, int oat_fd, const char* input_file_name,
699 const char* output_file_name, const char *pkgname __unused, const char *instruction_set)
700 {
701 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
702 static const unsigned int MAX_INSTRUCTION_SET_LEN = 7;
703
704 static const char* PATCHOAT_BIN = "/system/bin/patchoat";
705 if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
706 ALOGE("Instruction set %s longer than max length of %d",
707 instruction_set, MAX_INSTRUCTION_SET_LEN);
708 return;
709 }
710
711 /* input_file_name/input_fd should be the .odex/.oat file that is precompiled. I think*/
712 char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
713 char output_oat_fd_arg[strlen("--output-oat-fd=") + MAX_INT_LEN];
714 char input_oat_fd_arg[strlen("--input-oat-fd=") + MAX_INT_LEN];
715 const char* patched_image_location_arg = "--patched-image-location=/system/framework/boot.art";
716 // The caller has already gotten all the locks we need.
717 const char* no_lock_arg = "--no-lock-output";
718 sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
719 sprintf(output_oat_fd_arg, "--output-oat-fd=%d", oat_fd);
720 sprintf(input_oat_fd_arg, "--input-oat-fd=%d", input_fd);
721 ALOGV("Running %s isa=%s in-fd=%d (%s) out-fd=%d (%s)\n",
722 PATCHOAT_BIN, instruction_set, input_fd, input_file_name, oat_fd, output_file_name);
723
724 /* patchoat, patched-image-location, no-lock, isa, input-fd, output-fd */
725 char* argv[7];
726 argv[0] = (char*) PATCHOAT_BIN;
727 argv[1] = (char*) patched_image_location_arg;
728 argv[2] = (char*) no_lock_arg;
729 argv[3] = instruction_set_arg;
730 argv[4] = output_oat_fd_arg;
731 argv[5] = input_oat_fd_arg;
732 argv[6] = NULL;
733
734 execv(PATCHOAT_BIN, (char* const *)argv);
735 ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno));
736 }
737
check_boolean_property(const char * property_name,bool default_value=false)738 static bool check_boolean_property(const char* property_name, bool default_value = false) {
739 char tmp_property_value[PROPERTY_VALUE_MAX];
740 bool have_property = property_get(property_name, tmp_property_value, nullptr) > 0;
741 if (!have_property) {
742 return default_value;
743 }
744 return strcmp(tmp_property_value, "true") == 0;
745 }
746
run_dex2oat(int zip_fd,int oat_fd,const char * input_file_name,const char * output_file_name,int swap_fd,const char * pkgname,const char * instruction_set,bool vm_safe_mode,bool debuggable)747 static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name,
748 const char* output_file_name, int swap_fd, const char *pkgname, const char *instruction_set,
749 bool vm_safe_mode, bool debuggable)
750 {
751 static const unsigned int MAX_INSTRUCTION_SET_LEN = 7;
752
753 if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) {
754 ALOGE("Instruction set %s longer than max length of %d",
755 instruction_set, MAX_INSTRUCTION_SET_LEN);
756 return;
757 }
758
759 char prop_buf[PROPERTY_VALUE_MAX];
760 bool profiler = (property_get("dalvik.vm.profiler", prop_buf, "0") > 0) && (prop_buf[0] == '1');
761
762 char dex2oat_Xms_flag[PROPERTY_VALUE_MAX];
763 bool have_dex2oat_Xms_flag = property_get("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0;
764
765 char dex2oat_Xmx_flag[PROPERTY_VALUE_MAX];
766 bool have_dex2oat_Xmx_flag = property_get("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0;
767
768 char dex2oat_compiler_filter_flag[PROPERTY_VALUE_MAX];
769 bool have_dex2oat_compiler_filter_flag = property_get("dalvik.vm.dex2oat-filter",
770 dex2oat_compiler_filter_flag, NULL) > 0;
771
772 char dex2oat_threads_buf[PROPERTY_VALUE_MAX];
773 bool have_dex2oat_threads_flag = property_get("dalvik.vm.dex2oat-threads", dex2oat_threads_buf,
774 NULL) > 0;
775 char dex2oat_threads_arg[PROPERTY_VALUE_MAX + 2];
776 if (have_dex2oat_threads_flag) {
777 sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf);
778 }
779
780 char dex2oat_isa_features_key[PROPERTY_KEY_MAX];
781 sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set);
782 char dex2oat_isa_features[PROPERTY_VALUE_MAX];
783 bool have_dex2oat_isa_features = property_get(dex2oat_isa_features_key,
784 dex2oat_isa_features, NULL) > 0;
785
786 char dex2oat_isa_variant_key[PROPERTY_KEY_MAX];
787 sprintf(dex2oat_isa_variant_key, "dalvik.vm.isa.%s.variant", instruction_set);
788 char dex2oat_isa_variant[PROPERTY_VALUE_MAX];
789 bool have_dex2oat_isa_variant = property_get(dex2oat_isa_variant_key,
790 dex2oat_isa_variant, NULL) > 0;
791
792 const char *dex2oat_norelocation = "-Xnorelocate";
793 bool have_dex2oat_relocation_skip_flag = false;
794
795 char dex2oat_flags[PROPERTY_VALUE_MAX];
796 int dex2oat_flags_count = property_get("dalvik.vm.dex2oat-flags",
797 dex2oat_flags, NULL) <= 0 ? 0 : split_count(dex2oat_flags);
798 ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags);
799
800 // If we booting without the real /data, don't spend time compiling.
801 char vold_decrypt[PROPERTY_VALUE_MAX];
802 bool have_vold_decrypt = property_get("vold.decrypt", vold_decrypt, "") > 0;
803 bool skip_compilation = (have_vold_decrypt &&
804 (strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 ||
805 (strcmp(vold_decrypt, "1") == 0)));
806
807 bool use_jit = check_boolean_property("debug.usejit");
808 bool generate_debug_info = check_boolean_property("debug.generate-debug-info");
809
810 static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
811
812 static const char* RUNTIME_ARG = "--runtime-arg";
813
814 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
815
816 char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
817 char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
818 char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
819 char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX];
820 char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
821 char instruction_set_variant_arg[strlen("--instruction-set-variant=") + PROPERTY_VALUE_MAX];
822 char instruction_set_features_arg[strlen("--instruction-set-features=") + PROPERTY_VALUE_MAX];
823 char profile_file_arg[strlen("--profile-file=") + PKG_PATH_MAX];
824 char top_k_profile_threshold_arg[strlen("--top-k-profile-threshold=") + PROPERTY_VALUE_MAX];
825 char dex2oat_Xms_arg[strlen("-Xms") + PROPERTY_VALUE_MAX];
826 char dex2oat_Xmx_arg[strlen("-Xmx") + PROPERTY_VALUE_MAX];
827 char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + PROPERTY_VALUE_MAX];
828 bool have_dex2oat_swap_fd = false;
829 char dex2oat_swap_fd[strlen("--swap-fd=") + MAX_INT_LEN];
830
831 sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
832 sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
833 sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
834 sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
835 sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
836 sprintf(instruction_set_variant_arg, "--instruction-set-variant=%s", dex2oat_isa_variant);
837 sprintf(instruction_set_features_arg, "--instruction-set-features=%s", dex2oat_isa_features);
838 if (swap_fd >= 0) {
839 have_dex2oat_swap_fd = true;
840 sprintf(dex2oat_swap_fd, "--swap-fd=%d", swap_fd);
841 }
842
843 bool have_profile_file = false;
844 bool have_top_k_profile_threshold = false;
845 if (profiler && (strcmp(pkgname, "*") != 0)) {
846 char profile_file[PKG_PATH_MAX];
847 snprintf(profile_file, sizeof(profile_file), "%s/%s",
848 DALVIK_CACHE_PREFIX "profiles", pkgname);
849 struct stat st;
850 if ((stat(profile_file, &st) == 0) && (st.st_size > 0)) {
851 sprintf(profile_file_arg, "--profile-file=%s", profile_file);
852 have_profile_file = true;
853 if (property_get("dalvik.vm.profile.top-k-thr", prop_buf, NULL) > 0) {
854 snprintf(top_k_profile_threshold_arg, sizeof(top_k_profile_threshold_arg),
855 "--top-k-profile-threshold=%s", prop_buf);
856 have_top_k_profile_threshold = true;
857 }
858 }
859 }
860
861 if (have_dex2oat_Xms_flag) {
862 sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag);
863 }
864 if (have_dex2oat_Xmx_flag) {
865 sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag);
866 }
867 if (skip_compilation) {
868 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-none");
869 have_dex2oat_compiler_filter_flag = true;
870 have_dex2oat_relocation_skip_flag = true;
871 } else if (vm_safe_mode) {
872 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only");
873 have_dex2oat_compiler_filter_flag = true;
874 } else if (use_jit) {
875 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-at-runtime");
876 have_dex2oat_compiler_filter_flag = true;
877 } else if (have_dex2oat_compiler_filter_flag) {
878 sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", dex2oat_compiler_filter_flag);
879 }
880
881 // Check whether all apps should be compiled debuggable.
882 if (!debuggable) {
883 debuggable =
884 (property_get("dalvik.vm.always_debuggable", prop_buf, "0") > 0) &&
885 (prop_buf[0] == '1');
886 }
887
888 ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
889
890 const char* argv[7 // program name, mandatory arguments and the final NULL
891 + (have_dex2oat_isa_variant ? 1 : 0)
892 + (have_dex2oat_isa_features ? 1 : 0)
893 + (have_profile_file ? 1 : 0)
894 + (have_top_k_profile_threshold ? 1 : 0)
895 + (have_dex2oat_Xms_flag ? 2 : 0)
896 + (have_dex2oat_Xmx_flag ? 2 : 0)
897 + (have_dex2oat_compiler_filter_flag ? 1 : 0)
898 + (have_dex2oat_threads_flag ? 1 : 0)
899 + (have_dex2oat_swap_fd ? 1 : 0)
900 + (have_dex2oat_relocation_skip_flag ? 2 : 0)
901 + (generate_debug_info ? 1 : 0)
902 + (debuggable ? 1 : 0)
903 + dex2oat_flags_count];
904 int i = 0;
905 argv[i++] = DEX2OAT_BIN;
906 argv[i++] = zip_fd_arg;
907 argv[i++] = zip_location_arg;
908 argv[i++] = oat_fd_arg;
909 argv[i++] = oat_location_arg;
910 argv[i++] = instruction_set_arg;
911 if (have_dex2oat_isa_variant) {
912 argv[i++] = instruction_set_variant_arg;
913 }
914 if (have_dex2oat_isa_features) {
915 argv[i++] = instruction_set_features_arg;
916 }
917 if (have_profile_file) {
918 argv[i++] = profile_file_arg;
919 }
920 if (have_top_k_profile_threshold) {
921 argv[i++] = top_k_profile_threshold_arg;
922 }
923 if (have_dex2oat_Xms_flag) {
924 argv[i++] = RUNTIME_ARG;
925 argv[i++] = dex2oat_Xms_arg;
926 }
927 if (have_dex2oat_Xmx_flag) {
928 argv[i++] = RUNTIME_ARG;
929 argv[i++] = dex2oat_Xmx_arg;
930 }
931 if (have_dex2oat_compiler_filter_flag) {
932 argv[i++] = dex2oat_compiler_filter_arg;
933 }
934 if (have_dex2oat_threads_flag) {
935 argv[i++] = dex2oat_threads_arg;
936 }
937 if (have_dex2oat_swap_fd) {
938 argv[i++] = dex2oat_swap_fd;
939 }
940 if (generate_debug_info) {
941 argv[i++] = "--generate-debug-info";
942 }
943 if (debuggable) {
944 argv[i++] = "--debuggable";
945 }
946 if (dex2oat_flags_count) {
947 i += split(dex2oat_flags, argv + i);
948 }
949 if (have_dex2oat_relocation_skip_flag) {
950 argv[i++] = RUNTIME_ARG;
951 argv[i++] = dex2oat_norelocation;
952 }
953 // Do not add after dex2oat_flags, they should override others for debugging.
954 argv[i] = NULL;
955
956 execv(DEX2OAT_BIN, (char * const *)argv);
957 ALOGE("execv(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
958 }
959
wait_child(pid_t pid)960 static int wait_child(pid_t pid)
961 {
962 int status;
963 pid_t got_pid;
964
965 while (1) {
966 got_pid = waitpid(pid, &status, 0);
967 if (got_pid == -1 && errno == EINTR) {
968 printf("waitpid interrupted, retrying\n");
969 } else {
970 break;
971 }
972 }
973 if (got_pid != pid) {
974 ALOGW("waitpid failed: wanted %d, got %d: %s\n",
975 (int) pid, (int) got_pid, strerror(errno));
976 return 1;
977 }
978
979 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
980 return 0;
981 } else {
982 return status; /* always nonzero */
983 }
984 }
985
986 /*
987 * Whether dexopt should use a swap file when compiling an APK.
988 *
989 * If kAlwaysProvideSwapFile, do this on all devices (dex2oat will make a more informed decision
990 * itself, anyways).
991 *
992 * Otherwise, read "dalvik.vm.dex2oat-swap". If the property exists, return whether it is "true".
993 *
994 * Otherwise, return true if this is a low-mem device.
995 *
996 * Otherwise, return default value.
997 */
998 static bool kAlwaysProvideSwapFile = false;
999 static bool kDefaultProvideSwapFile = true;
1000
ShouldUseSwapFileForDexopt()1001 static bool ShouldUseSwapFileForDexopt() {
1002 if (kAlwaysProvideSwapFile) {
1003 return true;
1004 }
1005
1006 // Check the "override" property. If it exists, return value == "true".
1007 char dex2oat_prop_buf[PROPERTY_VALUE_MAX];
1008 if (property_get("dalvik.vm.dex2oat-swap", dex2oat_prop_buf, "") > 0) {
1009 if (strcmp(dex2oat_prop_buf, "true") == 0) {
1010 return true;
1011 } else {
1012 return false;
1013 }
1014 }
1015
1016 // Shortcut for default value. This is an implementation optimization for the process sketched
1017 // above. If the default value is true, we can avoid to check whether this is a low-mem device,
1018 // as low-mem is never returning false. The compiler will optimize this away if it can.
1019 if (kDefaultProvideSwapFile) {
1020 return true;
1021 }
1022
1023 bool is_low_mem = check_boolean_property("ro.config.low_ram");
1024 if (is_low_mem) {
1025 return true;
1026 }
1027
1028 // Default value must be false here.
1029 return kDefaultProvideSwapFile;
1030 }
1031
1032 /*
1033 * Computes the odex file for the given apk_path and instruction_set.
1034 * /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex
1035 *
1036 * Returns false if it failed to determine the odex file path.
1037 */
calculate_odex_file_path(char path[PKG_PATH_MAX],const char * apk_path,const char * instruction_set)1038 static bool calculate_odex_file_path(char path[PKG_PATH_MAX],
1039 const char *apk_path,
1040 const char *instruction_set)
1041 {
1042 if (strlen(apk_path) + strlen("oat/") + strlen(instruction_set)
1043 + strlen("/") + strlen("odex") + 1 > PKG_PATH_MAX) {
1044 ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path);
1045 return false;
1046 }
1047
1048 strcpy(path, apk_path);
1049 char *end = strrchr(path, '/');
1050 if (end == NULL) {
1051 ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path);
1052 return false;
1053 }
1054 const char *apk_end = apk_path + (end - path); // strrchr(apk_path, '/');
1055
1056 strcpy(end + 1, "oat/"); // path = /system/framework/oat/\0
1057 strcat(path, instruction_set); // path = /system/framework/oat/<isa>\0
1058 strcat(path, apk_end); // path = /system/framework/oat/<isa>/whatever.jar\0
1059 end = strrchr(path, '.');
1060 if (end == NULL) {
1061 ALOGE("apk_path '%s' has no extension.\n", apk_path);
1062 return false;
1063 }
1064 strcpy(end + 1, "odex");
1065 return true;
1066 }
1067
dexopt(const char * apk_path,uid_t uid,bool is_public,const char * pkgname,const char * instruction_set,int dexopt_needed,bool vm_safe_mode,bool debuggable,const char * oat_dir)1068 int dexopt(const char *apk_path, uid_t uid, bool is_public,
1069 const char *pkgname, const char *instruction_set, int dexopt_needed,
1070 bool vm_safe_mode, bool debuggable, const char* oat_dir)
1071 {
1072 struct utimbuf ut;
1073 struct stat input_stat;
1074 char out_path[PKG_PATH_MAX];
1075 char swap_file_name[PKG_PATH_MAX];
1076 const char *input_file;
1077 char in_odex_path[PKG_PATH_MAX];
1078 int res, input_fd=-1, out_fd=-1, swap_fd=-1;
1079
1080 // Early best-effort check whether we can fit the the path into our buffers.
1081 // Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run
1082 // without a swap file, if necessary.
1083 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
1084 ALOGE("apk_path too long '%s'\n", apk_path);
1085 return -1;
1086 }
1087
1088 if (oat_dir != NULL && oat_dir[0] != '!') {
1089 if (validate_apk_path(oat_dir)) {
1090 ALOGE("invalid oat_dir '%s'\n", oat_dir);
1091 return -1;
1092 }
1093 if (calculate_oat_file_path(out_path, oat_dir, apk_path, instruction_set)) {
1094 return -1;
1095 }
1096 } else {
1097 if (create_cache_path(out_path, apk_path, instruction_set)) {
1098 return -1;
1099 }
1100 }
1101
1102 switch (dexopt_needed) {
1103 case DEXOPT_DEX2OAT_NEEDED:
1104 input_file = apk_path;
1105 break;
1106
1107 case DEXOPT_PATCHOAT_NEEDED:
1108 if (!calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) {
1109 return -1;
1110 }
1111 input_file = in_odex_path;
1112 break;
1113
1114 case DEXOPT_SELF_PATCHOAT_NEEDED:
1115 input_file = out_path;
1116 break;
1117
1118 default:
1119 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
1120 exit(72);
1121 }
1122
1123 memset(&input_stat, 0, sizeof(input_stat));
1124 stat(input_file, &input_stat);
1125
1126 input_fd = open(input_file, O_RDONLY, 0);
1127 if (input_fd < 0) {
1128 ALOGE("installd cannot open '%s' for input during dexopt\n", input_file);
1129 return -1;
1130 }
1131
1132 unlink(out_path);
1133 out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
1134 if (out_fd < 0) {
1135 ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
1136 goto fail;
1137 }
1138 if (fchmod(out_fd,
1139 S_IRUSR|S_IWUSR|S_IRGRP |
1140 (is_public ? S_IROTH : 0)) < 0) {
1141 ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
1142 goto fail;
1143 }
1144 if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
1145 ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
1146 goto fail;
1147 }
1148
1149 // Create profile file if there is a package name present.
1150 if (strcmp(pkgname, "*") != 0) {
1151 create_profile_file(pkgname, uid);
1152 }
1153
1154 // Create a swap file if necessary.
1155 if (ShouldUseSwapFileForDexopt()) {
1156 // Make sure there really is enough space.
1157 size_t out_len = strlen(out_path);
1158 if (out_len + strlen(".swap") + 1 <= PKG_PATH_MAX) {
1159 strcpy(swap_file_name, out_path);
1160 strcpy(swap_file_name + strlen(out_path), ".swap");
1161 unlink(swap_file_name);
1162 swap_fd = open(swap_file_name, O_RDWR | O_CREAT | O_EXCL, 0600);
1163 if (swap_fd < 0) {
1164 // Could not create swap file. Optimistically go on and hope that we can compile
1165 // without it.
1166 ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name);
1167 } else {
1168 // Immediately unlink. We don't really want to hit flash.
1169 unlink(swap_file_name);
1170 }
1171 } else {
1172 // Swap file path is too long. Try to run without.
1173 ALOGE("installd could not create swap file for path %s during dexopt\n", out_path);
1174 }
1175 }
1176
1177 ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file);
1178
1179 pid_t pid;
1180 pid = fork();
1181 if (pid == 0) {
1182 /* child -- drop privileges before continuing */
1183 if (setgid(uid) != 0) {
1184 ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
1185 exit(64);
1186 }
1187 if (setuid(uid) != 0) {
1188 ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
1189 exit(65);
1190 }
1191 // drop capabilities
1192 struct __user_cap_header_struct capheader;
1193 struct __user_cap_data_struct capdata[2];
1194 memset(&capheader, 0, sizeof(capheader));
1195 memset(&capdata, 0, sizeof(capdata));
1196 capheader.version = _LINUX_CAPABILITY_VERSION_3;
1197 if (capset(&capheader, &capdata[0]) < 0) {
1198 ALOGE("capset failed: %s\n", strerror(errno));
1199 exit(66);
1200 }
1201 if (set_sched_policy(0, SP_BACKGROUND) < 0) {
1202 ALOGE("set_sched_policy failed: %s\n", strerror(errno));
1203 exit(70);
1204 }
1205 if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
1206 ALOGE("setpriority failed: %s\n", strerror(errno));
1207 exit(71);
1208 }
1209 if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
1210 ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
1211 exit(67);
1212 }
1213
1214 if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
1215 || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
1216 run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set);
1217 } else if (dexopt_needed == DEXOPT_DEX2OAT_NEEDED) {
1218 const char *input_file_name = strrchr(input_file, '/');
1219 if (input_file_name == NULL) {
1220 input_file_name = input_file;
1221 } else {
1222 input_file_name++;
1223 }
1224 run_dex2oat(input_fd, out_fd, input_file_name, out_path, swap_fd, pkgname,
1225 instruction_set, vm_safe_mode, debuggable);
1226 } else {
1227 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
1228 exit(73);
1229 }
1230 exit(68); /* only get here on exec failure */
1231 } else {
1232 res = wait_child(pid);
1233 if (res == 0) {
1234 ALOGV("DexInv: --- END '%s' (success) ---\n", input_file);
1235 } else {
1236 ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res);
1237 goto fail;
1238 }
1239 }
1240
1241 ut.actime = input_stat.st_atime;
1242 ut.modtime = input_stat.st_mtime;
1243 utime(out_path, &ut);
1244
1245 close(out_fd);
1246 close(input_fd);
1247 if (swap_fd != -1) {
1248 close(swap_fd);
1249 }
1250 return 0;
1251
1252 fail:
1253 if (out_fd >= 0) {
1254 close(out_fd);
1255 unlink(out_path);
1256 }
1257 if (input_fd >= 0) {
1258 close(input_fd);
1259 }
1260 return -1;
1261 }
1262
mark_boot_complete(const char * instruction_set)1263 int mark_boot_complete(const char* instruction_set)
1264 {
1265 char boot_marker_path[PKG_PATH_MAX];
1266 sprintf(boot_marker_path,"%s%s/.booting", DALVIK_CACHE_PREFIX, instruction_set);
1267
1268 ALOGV("mark_boot_complete : %s", boot_marker_path);
1269 if (unlink(boot_marker_path) != 0) {
1270 ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path,
1271 strerror(errno));
1272 return -1;
1273 }
1274
1275 return 0;
1276 }
1277
mkinnerdirs(char * path,int basepos,mode_t mode,int uid,int gid,struct stat * statbuf)1278 void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
1279 struct stat* statbuf)
1280 {
1281 while (path[basepos] != 0) {
1282 if (path[basepos] == '/') {
1283 path[basepos] = 0;
1284 if (lstat(path, statbuf) < 0) {
1285 ALOGV("Making directory: %s\n", path);
1286 if (mkdir(path, mode) == 0) {
1287 chown(path, uid, gid);
1288 } else {
1289 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
1290 }
1291 }
1292 path[basepos] = '/';
1293 basepos++;
1294 }
1295 basepos++;
1296 }
1297 }
1298
movefileordir(char * srcpath,char * dstpath,int dstbasepos,int dstuid,int dstgid,struct stat * statbuf)1299 int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
1300 int dstuid, int dstgid, struct stat* statbuf)
1301 {
1302 DIR *d;
1303 struct dirent *de;
1304 int res;
1305
1306 int srcend = strlen(srcpath);
1307 int dstend = strlen(dstpath);
1308
1309 if (lstat(srcpath, statbuf) < 0) {
1310 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
1311 return 1;
1312 }
1313
1314 if ((statbuf->st_mode&S_IFDIR) == 0) {
1315 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
1316 dstuid, dstgid, statbuf);
1317 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
1318 if (rename(srcpath, dstpath) >= 0) {
1319 if (chown(dstpath, dstuid, dstgid) < 0) {
1320 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
1321 unlink(dstpath);
1322 return 1;
1323 }
1324 } else {
1325 ALOGW("Unable to rename %s to %s: %s\n",
1326 srcpath, dstpath, strerror(errno));
1327 return 1;
1328 }
1329 return 0;
1330 }
1331
1332 d = opendir(srcpath);
1333 if (d == NULL) {
1334 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
1335 return 1;
1336 }
1337
1338 res = 0;
1339
1340 while ((de = readdir(d))) {
1341 const char *name = de->d_name;
1342 /* always skip "." and ".." */
1343 if (name[0] == '.') {
1344 if (name[1] == 0) continue;
1345 if ((name[1] == '.') && (name[2] == 0)) continue;
1346 }
1347
1348 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
1349 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
1350 continue;
1351 }
1352
1353 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
1354 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
1355 continue;
1356 }
1357
1358 srcpath[srcend] = dstpath[dstend] = '/';
1359 strcpy(srcpath+srcend+1, name);
1360 strcpy(dstpath+dstend+1, name);
1361
1362 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
1363 res = 1;
1364 }
1365
1366 // Note: we will be leaving empty directories behind in srcpath,
1367 // but that is okay, the package manager will be erasing all of the
1368 // data associated with .apks that disappear.
1369
1370 srcpath[srcend] = dstpath[dstend] = 0;
1371 }
1372
1373 closedir(d);
1374 return res;
1375 }
1376
movefiles()1377 int movefiles()
1378 {
1379 DIR *d;
1380 int dfd, subfd;
1381 struct dirent *de;
1382 struct stat s;
1383 char buf[PKG_PATH_MAX+1];
1384 int bufp, bufe, bufi, readlen;
1385
1386 char srcpkg[PKG_NAME_MAX];
1387 char dstpkg[PKG_NAME_MAX];
1388 char srcpath[PKG_PATH_MAX];
1389 char dstpath[PKG_PATH_MAX];
1390 int dstuid=-1, dstgid=-1;
1391 int hasspace;
1392
1393 d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
1394 if (d == NULL) {
1395 goto done;
1396 }
1397 dfd = dirfd(d);
1398
1399 /* Iterate through all files in the directory, executing the
1400 * file movements requested there-in.
1401 */
1402 while ((de = readdir(d))) {
1403 const char *name = de->d_name;
1404
1405 if (de->d_type == DT_DIR) {
1406 continue;
1407 } else {
1408 subfd = openat(dfd, name, O_RDONLY);
1409 if (subfd < 0) {
1410 ALOGW("Unable to open update commands at %s%s\n",
1411 UPDATE_COMMANDS_DIR_PREFIX, name);
1412 continue;
1413 }
1414
1415 bufp = 0;
1416 bufe = 0;
1417 buf[PKG_PATH_MAX] = 0;
1418 srcpkg[0] = dstpkg[0] = 0;
1419 while (1) {
1420 bufi = bufp;
1421 while (bufi < bufe && buf[bufi] != '\n') {
1422 bufi++;
1423 }
1424 if (bufi < bufe) {
1425 buf[bufi] = 0;
1426 ALOGV("Processing line: %s\n", buf+bufp);
1427 hasspace = 0;
1428 while (bufp < bufi && isspace(buf[bufp])) {
1429 hasspace = 1;
1430 bufp++;
1431 }
1432 if (buf[bufp] == '#' || bufp == bufi) {
1433 // skip comments and empty lines.
1434 } else if (hasspace) {
1435 if (dstpkg[0] == 0) {
1436 ALOGW("Path before package line in %s%s: %s\n",
1437 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1438 } else if (srcpkg[0] == 0) {
1439 // Skip -- source package no longer exists.
1440 } else {
1441 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
1442 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
1443 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
1444 movefileordir(srcpath, dstpath,
1445 strlen(dstpath)-strlen(buf+bufp),
1446 dstuid, dstgid, &s);
1447 }
1448 }
1449 } else {
1450 char* div = strchr(buf+bufp, ':');
1451 if (div == NULL) {
1452 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
1453 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1454 } else {
1455 *div = 0;
1456 div++;
1457 if (strlen(buf+bufp) < PKG_NAME_MAX) {
1458 strcpy(dstpkg, buf+bufp);
1459 } else {
1460 srcpkg[0] = dstpkg[0] = 0;
1461 ALOGW("Package name too long in %s%s: %s\n",
1462 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1463 }
1464 if (strlen(div) < PKG_NAME_MAX) {
1465 strcpy(srcpkg, div);
1466 } else {
1467 srcpkg[0] = dstpkg[0] = 0;
1468 ALOGW("Package name too long in %s%s: %s\n",
1469 UPDATE_COMMANDS_DIR_PREFIX, name, div);
1470 }
1471 if (srcpkg[0] != 0) {
1472 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
1473 if (lstat(srcpath, &s) < 0) {
1474 // Package no longer exists -- skip.
1475 srcpkg[0] = 0;
1476 }
1477 } else {
1478 srcpkg[0] = 0;
1479 ALOGW("Can't create path %s in %s%s\n",
1480 div, UPDATE_COMMANDS_DIR_PREFIX, name);
1481 }
1482 if (srcpkg[0] != 0) {
1483 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
1484 if (lstat(dstpath, &s) == 0) {
1485 dstuid = s.st_uid;
1486 dstgid = s.st_gid;
1487 } else {
1488 // Destination package doesn't
1489 // exist... due to original-package,
1490 // this is normal, so don't be
1491 // noisy about it.
1492 srcpkg[0] = 0;
1493 }
1494 } else {
1495 srcpkg[0] = 0;
1496 ALOGW("Can't create path %s in %s%s\n",
1497 div, UPDATE_COMMANDS_DIR_PREFIX, name);
1498 }
1499 }
1500 ALOGV("Transfering from %s to %s: uid=%d\n",
1501 srcpkg, dstpkg, dstuid);
1502 }
1503 }
1504 }
1505 bufp = bufi+1;
1506 } else {
1507 if (bufp == 0) {
1508 if (bufp < bufe) {
1509 ALOGW("Line too long in %s%s, skipping: %s\n",
1510 UPDATE_COMMANDS_DIR_PREFIX, name, buf);
1511 }
1512 } else if (bufp < bufe) {
1513 memcpy(buf, buf+bufp, bufe-bufp);
1514 bufe -= bufp;
1515 bufp = 0;
1516 }
1517 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
1518 if (readlen < 0) {
1519 ALOGW("Failure reading update commands in %s%s: %s\n",
1520 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
1521 break;
1522 } else if (readlen == 0) {
1523 break;
1524 }
1525 bufe += readlen;
1526 buf[bufe] = 0;
1527 ALOGV("Read buf: %s\n", buf);
1528 }
1529 }
1530 close(subfd);
1531 }
1532 }
1533 closedir(d);
1534 done:
1535 return 0;
1536 }
1537
linklib(const char * uuid,const char * pkgname,const char * asecLibDir,int userId)1538 int linklib(const char* uuid, const char* pkgname, const char* asecLibDir, int userId)
1539 {
1540 struct stat s, libStat;
1541 int rc = 0;
1542
1543 std::string _pkgdir(create_data_user_package_path(uuid, userId, pkgname));
1544 std::string _libsymlink(_pkgdir + PKG_LIB_POSTFIX);
1545
1546 const char* pkgdir = _pkgdir.c_str();
1547 const char* libsymlink = _libsymlink.c_str();
1548
1549 if (stat(pkgdir, &s) < 0) return -1;
1550
1551 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
1552 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
1553 return -1;
1554 }
1555
1556 if (chmod(pkgdir, 0700) < 0) {
1557 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1558 rc = -1;
1559 goto out;
1560 }
1561
1562 if (lstat(libsymlink, &libStat) < 0) {
1563 if (errno != ENOENT) {
1564 ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1565 rc = -1;
1566 goto out;
1567 }
1568 } else {
1569 if (S_ISDIR(libStat.st_mode)) {
1570 if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
1571 rc = -1;
1572 goto out;
1573 }
1574 } else if (S_ISLNK(libStat.st_mode)) {
1575 if (unlink(libsymlink) < 0) {
1576 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
1577 rc = -1;
1578 goto out;
1579 }
1580 }
1581 }
1582
1583 if (symlink(asecLibDir, libsymlink) < 0) {
1584 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
1585 strerror(errno));
1586 rc = -errno;
1587 goto out;
1588 }
1589
1590 out:
1591 if (chmod(pkgdir, s.st_mode) < 0) {
1592 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1593 rc = -errno;
1594 }
1595
1596 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1597 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
1598 return -errno;
1599 }
1600
1601 return rc;
1602 }
1603
run_idmap(const char * target_apk,const char * overlay_apk,int idmap_fd)1604 static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
1605 {
1606 static const char *IDMAP_BIN = "/system/bin/idmap";
1607 static const size_t MAX_INT_LEN = 32;
1608 char idmap_str[MAX_INT_LEN];
1609
1610 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
1611
1612 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
1613 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
1614 }
1615
1616 // Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
1617 // eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap
flatten_path(const char * prefix,const char * suffix,const char * overlay_path,char * idmap_path,size_t N)1618 static int flatten_path(const char *prefix, const char *suffix,
1619 const char *overlay_path, char *idmap_path, size_t N)
1620 {
1621 if (overlay_path == NULL || idmap_path == NULL) {
1622 return -1;
1623 }
1624 const size_t len_overlay_path = strlen(overlay_path);
1625 // will access overlay_path + 1 further below; requires absolute path
1626 if (len_overlay_path < 2 || *overlay_path != '/') {
1627 return -1;
1628 }
1629 const size_t len_idmap_root = strlen(prefix);
1630 const size_t len_suffix = strlen(suffix);
1631 if (SIZE_MAX - len_idmap_root < len_overlay_path ||
1632 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
1633 // additions below would cause overflow
1634 return -1;
1635 }
1636 if (N < len_idmap_root + len_overlay_path + len_suffix) {
1637 return -1;
1638 }
1639 memset(idmap_path, 0, N);
1640 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
1641 char *ch = idmap_path + len_idmap_root;
1642 while (*ch != '\0') {
1643 if (*ch == '/') {
1644 *ch = '@';
1645 }
1646 ++ch;
1647 }
1648 return 0;
1649 }
1650
idmap(const char * target_apk,const char * overlay_apk,uid_t uid)1651 int idmap(const char *target_apk, const char *overlay_apk, uid_t uid)
1652 {
1653 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
1654
1655 int idmap_fd = -1;
1656 char idmap_path[PATH_MAX];
1657
1658 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
1659 idmap_path, sizeof(idmap_path)) == -1) {
1660 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
1661 goto fail;
1662 }
1663
1664 unlink(idmap_path);
1665 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
1666 if (idmap_fd < 0) {
1667 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
1668 goto fail;
1669 }
1670 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
1671 ALOGE("idmap cannot chown '%s'\n", idmap_path);
1672 goto fail;
1673 }
1674 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
1675 ALOGE("idmap cannot chmod '%s'\n", idmap_path);
1676 goto fail;
1677 }
1678
1679 pid_t pid;
1680 pid = fork();
1681 if (pid == 0) {
1682 /* child -- drop privileges before continuing */
1683 if (setgid(uid) != 0) {
1684 ALOGE("setgid(%d) failed during idmap\n", uid);
1685 exit(1);
1686 }
1687 if (setuid(uid) != 0) {
1688 ALOGE("setuid(%d) failed during idmap\n", uid);
1689 exit(1);
1690 }
1691 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
1692 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
1693 exit(1);
1694 }
1695
1696 run_idmap(target_apk, overlay_apk, idmap_fd);
1697 exit(1); /* only if exec call to idmap failed */
1698 } else {
1699 int status = wait_child(pid);
1700 if (status != 0) {
1701 ALOGE("idmap failed, status=0x%04x\n", status);
1702 goto fail;
1703 }
1704 }
1705
1706 close(idmap_fd);
1707 return 0;
1708 fail:
1709 if (idmap_fd >= 0) {
1710 close(idmap_fd);
1711 unlink(idmap_path);
1712 }
1713 return -1;
1714 }
1715
restorecon_data(const char * uuid,const char * pkgName,const char * seinfo,uid_t uid)1716 int restorecon_data(const char* uuid, const char* pkgName,
1717 const char* seinfo, uid_t uid)
1718 {
1719 struct dirent *entry;
1720 DIR *d;
1721 struct stat s;
1722 int ret = 0;
1723
1724 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
1725 unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE;
1726
1727 if (!pkgName || !seinfo) {
1728 ALOGE("Package name or seinfo tag is null when trying to restorecon.");
1729 return -1;
1730 }
1731
1732 // Special case for owner on internal storage
1733 if (uuid == nullptr) {
1734 std::string path(create_data_user_package_path(nullptr, 0, pkgName));
1735
1736 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, flags) < 0) {
1737 PLOG(ERROR) << "restorecon failed for " << path;
1738 ret |= -1;
1739 }
1740 }
1741
1742 // Relabel package directory for all secondary users.
1743 std::string userdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX);
1744 d = opendir(userdir.c_str());
1745 if (d == NULL) {
1746 return -1;
1747 }
1748
1749 while ((entry = readdir(d))) {
1750 if (entry->d_type != DT_DIR) {
1751 continue;
1752 }
1753
1754 const char *user = entry->d_name;
1755 // Ignore "." and ".."
1756 if (!strcmp(user, ".") || !strcmp(user, "..")) {
1757 continue;
1758 }
1759
1760 // user directories start with a number
1761 if (user[0] < '0' || user[0] > '9') {
1762 ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user);
1763 continue;
1764 }
1765
1766 std::string pkgdir(StringPrintf("%s%s/%s", userdir.c_str(), user, pkgName));
1767 if (stat(pkgdir.c_str(), &s) < 0) {
1768 continue;
1769 }
1770
1771 if (selinux_android_restorecon_pkgdir(pkgdir.c_str(), seinfo, s.st_uid, flags) < 0) {
1772 PLOG(ERROR) << "restorecon failed for " << pkgdir;
1773 ret |= -1;
1774 }
1775 }
1776
1777 closedir(d);
1778 return ret;
1779 }
1780
create_oat_dir(const char * oat_dir,const char * instruction_set)1781 int create_oat_dir(const char* oat_dir, const char* instruction_set)
1782 {
1783 char oat_instr_dir[PKG_PATH_MAX];
1784
1785 if (validate_apk_path(oat_dir)) {
1786 ALOGE("invalid apk path '%s' (bad prefix)\n", oat_dir);
1787 return -1;
1788 }
1789 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1790 return -1;
1791 }
1792 if (selinux_android_restorecon(oat_dir, 0)) {
1793 ALOGE("cannot restorecon dir '%s': %s\n", oat_dir, strerror(errno));
1794 return -1;
1795 }
1796 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set);
1797 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1798 return -1;
1799 }
1800 return 0;
1801 }
1802
rm_package_dir(const char * apk_path)1803 int rm_package_dir(const char* apk_path)
1804 {
1805 if (validate_apk_path(apk_path)) {
1806 ALOGE("invalid apk path '%s' (bad prefix)\n", apk_path);
1807 return -1;
1808 }
1809 return delete_dir_contents(apk_path, 1 /* also_delete_dir */ , NULL /* exclusion_predicate */);
1810 }
1811
link_file(const char * relative_path,const char * from_base,const char * to_base)1812 int link_file(const char* relative_path, const char* from_base, const char* to_base) {
1813 char from_path[PKG_PATH_MAX];
1814 char to_path[PKG_PATH_MAX];
1815 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
1816 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);
1817
1818 if (validate_apk_path_subdirs(from_path)) {
1819 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path);
1820 return -1;
1821 }
1822
1823 if (validate_apk_path_subdirs(to_path)) {
1824 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path);
1825 return -1;
1826 }
1827
1828 const int ret = link(from_path, to_path);
1829 if (ret < 0) {
1830 ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno));
1831 return -1;
1832 }
1833
1834 return 0;
1835 }
1836
calculate_oat_file_path(char path[PKG_PATH_MAX],const char * oat_dir,const char * apk_path,const char * instruction_set)1837 int calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path,
1838 const char *instruction_set) {
1839 char *file_name_start;
1840 char *file_name_end;
1841
1842 file_name_start = strrchr(apk_path, '/');
1843 if (file_name_start == NULL) {
1844 ALOGE("apk_path '%s' has no '/'s in it\n", apk_path);
1845 return -1;
1846 }
1847 file_name_end = strrchr(apk_path, '.');
1848 if (file_name_end < file_name_start) {
1849 ALOGE("apk_path '%s' has no extension\n", apk_path);
1850 return -1;
1851 }
1852
1853 // Calculate file_name
1854 int file_name_len = file_name_end - file_name_start - 1;
1855 char file_name[file_name_len + 1];
1856 memcpy(file_name, file_name_start + 1, file_name_len);
1857 file_name[file_name_len] = '\0';
1858
1859 // <apk_parent_dir>/oat/<isa>/<file_name>.odex
1860 snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name);
1861 return 0;
1862 }
1863