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,bool post_bootcomplete)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, bool post_bootcomplete)
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 = false;
774 if (!post_bootcomplete) {
775 have_dex2oat_threads_flag = property_get("dalvik.vm.boot-dex2oat-threads",
776 dex2oat_threads_buf,
777 NULL) > 0;
778 // If there's no boot property, fall back to the image property.
779 if (!have_dex2oat_threads_flag) {
780 have_dex2oat_threads_flag = property_get("dalvik.vm.image-dex2oat-threads",
781 dex2oat_threads_buf,
782 NULL) > 0;
783 }
784 // If there's neither, fall back to the default property.
785 }
786 if (!have_dex2oat_threads_flag) {
787 have_dex2oat_threads_flag = property_get("dalvik.vm.dex2oat-threads",
788 dex2oat_threads_buf,
789 NULL) > 0;
790 }
791 char dex2oat_threads_arg[PROPERTY_VALUE_MAX + 2];
792 if (have_dex2oat_threads_flag) {
793 sprintf(dex2oat_threads_arg, "-j%s", dex2oat_threads_buf);
794 }
795
796 char dex2oat_isa_features_key[PROPERTY_KEY_MAX];
797 sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set);
798 char dex2oat_isa_features[PROPERTY_VALUE_MAX];
799 bool have_dex2oat_isa_features = property_get(dex2oat_isa_features_key,
800 dex2oat_isa_features, NULL) > 0;
801
802 char dex2oat_isa_variant_key[PROPERTY_KEY_MAX];
803 sprintf(dex2oat_isa_variant_key, "dalvik.vm.isa.%s.variant", instruction_set);
804 char dex2oat_isa_variant[PROPERTY_VALUE_MAX];
805 bool have_dex2oat_isa_variant = property_get(dex2oat_isa_variant_key,
806 dex2oat_isa_variant, NULL) > 0;
807
808 const char *dex2oat_norelocation = "-Xnorelocate";
809 bool have_dex2oat_relocation_skip_flag = false;
810
811 char dex2oat_flags[PROPERTY_VALUE_MAX];
812 int dex2oat_flags_count = property_get("dalvik.vm.dex2oat-flags",
813 dex2oat_flags, NULL) <= 0 ? 0 : split_count(dex2oat_flags);
814 ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags);
815
816 // If we booting without the real /data, don't spend time compiling.
817 char vold_decrypt[PROPERTY_VALUE_MAX];
818 bool have_vold_decrypt = property_get("vold.decrypt", vold_decrypt, "") > 0;
819 bool skip_compilation = (have_vold_decrypt &&
820 (strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 ||
821 (strcmp(vold_decrypt, "1") == 0)));
822
823 bool use_jit = check_boolean_property("debug.usejit");
824 bool generate_debug_info = check_boolean_property("debug.generate-debug-info");
825
826 static const char* DEX2OAT_BIN = "/system/bin/dex2oat";
827
828 static const char* RUNTIME_ARG = "--runtime-arg";
829
830 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
831
832 char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN];
833 char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX];
834 char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN];
835 char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX];
836 char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN];
837 char instruction_set_variant_arg[strlen("--instruction-set-variant=") + PROPERTY_VALUE_MAX];
838 char instruction_set_features_arg[strlen("--instruction-set-features=") + PROPERTY_VALUE_MAX];
839 char profile_file_arg[strlen("--profile-file=") + PKG_PATH_MAX];
840 char top_k_profile_threshold_arg[strlen("--top-k-profile-threshold=") + PROPERTY_VALUE_MAX];
841 char dex2oat_Xms_arg[strlen("-Xms") + PROPERTY_VALUE_MAX];
842 char dex2oat_Xmx_arg[strlen("-Xmx") + PROPERTY_VALUE_MAX];
843 char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + PROPERTY_VALUE_MAX];
844 bool have_dex2oat_swap_fd = false;
845 char dex2oat_swap_fd[strlen("--swap-fd=") + MAX_INT_LEN];
846
847 sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd);
848 sprintf(zip_location_arg, "--zip-location=%s", input_file_name);
849 sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd);
850 sprintf(oat_location_arg, "--oat-location=%s", output_file_name);
851 sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set);
852 sprintf(instruction_set_variant_arg, "--instruction-set-variant=%s", dex2oat_isa_variant);
853 sprintf(instruction_set_features_arg, "--instruction-set-features=%s", dex2oat_isa_features);
854 if (swap_fd >= 0) {
855 have_dex2oat_swap_fd = true;
856 sprintf(dex2oat_swap_fd, "--swap-fd=%d", swap_fd);
857 }
858
859 bool have_profile_file = false;
860 bool have_top_k_profile_threshold = false;
861 if (profiler && (strcmp(pkgname, "*") != 0)) {
862 char profile_file[PKG_PATH_MAX];
863 snprintf(profile_file, sizeof(profile_file), "%s/%s",
864 DALVIK_CACHE_PREFIX "profiles", pkgname);
865 struct stat st;
866 if ((stat(profile_file, &st) == 0) && (st.st_size > 0)) {
867 sprintf(profile_file_arg, "--profile-file=%s", profile_file);
868 have_profile_file = true;
869 if (property_get("dalvik.vm.profile.top-k-thr", prop_buf, NULL) > 0) {
870 snprintf(top_k_profile_threshold_arg, sizeof(top_k_profile_threshold_arg),
871 "--top-k-profile-threshold=%s", prop_buf);
872 have_top_k_profile_threshold = true;
873 }
874 }
875 }
876
877 if (have_dex2oat_Xms_flag) {
878 sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag);
879 }
880 if (have_dex2oat_Xmx_flag) {
881 sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag);
882 }
883 if (skip_compilation) {
884 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-none");
885 have_dex2oat_compiler_filter_flag = true;
886 have_dex2oat_relocation_skip_flag = true;
887 } else if (vm_safe_mode) {
888 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only");
889 have_dex2oat_compiler_filter_flag = true;
890 } else if (use_jit) {
891 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-at-runtime");
892 have_dex2oat_compiler_filter_flag = true;
893 } else if (have_dex2oat_compiler_filter_flag) {
894 sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", dex2oat_compiler_filter_flag);
895 }
896
897 // Check whether all apps should be compiled debuggable.
898 if (!debuggable) {
899 debuggable =
900 (property_get("dalvik.vm.always_debuggable", prop_buf, "0") > 0) &&
901 (prop_buf[0] == '1');
902 }
903
904 ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name);
905
906 const char* argv[7 // program name, mandatory arguments and the final NULL
907 + (have_dex2oat_isa_variant ? 1 : 0)
908 + (have_dex2oat_isa_features ? 1 : 0)
909 + (have_profile_file ? 1 : 0)
910 + (have_top_k_profile_threshold ? 1 : 0)
911 + (have_dex2oat_Xms_flag ? 2 : 0)
912 + (have_dex2oat_Xmx_flag ? 2 : 0)
913 + (have_dex2oat_compiler_filter_flag ? 1 : 0)
914 + (have_dex2oat_threads_flag ? 1 : 0)
915 + (have_dex2oat_swap_fd ? 1 : 0)
916 + (have_dex2oat_relocation_skip_flag ? 2 : 0)
917 + (generate_debug_info ? 1 : 0)
918 + (debuggable ? 1 : 0)
919 + dex2oat_flags_count];
920 int i = 0;
921 argv[i++] = DEX2OAT_BIN;
922 argv[i++] = zip_fd_arg;
923 argv[i++] = zip_location_arg;
924 argv[i++] = oat_fd_arg;
925 argv[i++] = oat_location_arg;
926 argv[i++] = instruction_set_arg;
927 if (have_dex2oat_isa_variant) {
928 argv[i++] = instruction_set_variant_arg;
929 }
930 if (have_dex2oat_isa_features) {
931 argv[i++] = instruction_set_features_arg;
932 }
933 if (have_profile_file) {
934 argv[i++] = profile_file_arg;
935 }
936 if (have_top_k_profile_threshold) {
937 argv[i++] = top_k_profile_threshold_arg;
938 }
939 if (have_dex2oat_Xms_flag) {
940 argv[i++] = RUNTIME_ARG;
941 argv[i++] = dex2oat_Xms_arg;
942 }
943 if (have_dex2oat_Xmx_flag) {
944 argv[i++] = RUNTIME_ARG;
945 argv[i++] = dex2oat_Xmx_arg;
946 }
947 if (have_dex2oat_compiler_filter_flag) {
948 argv[i++] = dex2oat_compiler_filter_arg;
949 }
950 if (have_dex2oat_threads_flag) {
951 argv[i++] = dex2oat_threads_arg;
952 }
953 if (have_dex2oat_swap_fd) {
954 argv[i++] = dex2oat_swap_fd;
955 }
956 if (generate_debug_info) {
957 argv[i++] = "--generate-debug-info";
958 }
959 if (debuggable) {
960 argv[i++] = "--debuggable";
961 }
962 if (dex2oat_flags_count) {
963 i += split(dex2oat_flags, argv + i);
964 }
965 if (have_dex2oat_relocation_skip_flag) {
966 argv[i++] = RUNTIME_ARG;
967 argv[i++] = dex2oat_norelocation;
968 }
969 // Do not add after dex2oat_flags, they should override others for debugging.
970 argv[i] = NULL;
971
972 execv(DEX2OAT_BIN, (char * const *)argv);
973 ALOGE("execv(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno));
974 }
975
wait_child(pid_t pid)976 static int wait_child(pid_t pid)
977 {
978 int status;
979 pid_t got_pid;
980
981 while (1) {
982 got_pid = waitpid(pid, &status, 0);
983 if (got_pid == -1 && errno == EINTR) {
984 printf("waitpid interrupted, retrying\n");
985 } else {
986 break;
987 }
988 }
989 if (got_pid != pid) {
990 ALOGW("waitpid failed: wanted %d, got %d: %s\n",
991 (int) pid, (int) got_pid, strerror(errno));
992 return 1;
993 }
994
995 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
996 return 0;
997 } else {
998 return status; /* always nonzero */
999 }
1000 }
1001
1002 /*
1003 * Whether dexopt should use a swap file when compiling an APK.
1004 *
1005 * If kAlwaysProvideSwapFile, do this on all devices (dex2oat will make a more informed decision
1006 * itself, anyways).
1007 *
1008 * Otherwise, read "dalvik.vm.dex2oat-swap". If the property exists, return whether it is "true".
1009 *
1010 * Otherwise, return true if this is a low-mem device.
1011 *
1012 * Otherwise, return default value.
1013 */
1014 static bool kAlwaysProvideSwapFile = false;
1015 static bool kDefaultProvideSwapFile = true;
1016
ShouldUseSwapFileForDexopt()1017 static bool ShouldUseSwapFileForDexopt() {
1018 if (kAlwaysProvideSwapFile) {
1019 return true;
1020 }
1021
1022 // Check the "override" property. If it exists, return value == "true".
1023 char dex2oat_prop_buf[PROPERTY_VALUE_MAX];
1024 if (property_get("dalvik.vm.dex2oat-swap", dex2oat_prop_buf, "") > 0) {
1025 if (strcmp(dex2oat_prop_buf, "true") == 0) {
1026 return true;
1027 } else {
1028 return false;
1029 }
1030 }
1031
1032 // Shortcut for default value. This is an implementation optimization for the process sketched
1033 // above. If the default value is true, we can avoid to check whether this is a low-mem device,
1034 // as low-mem is never returning false. The compiler will optimize this away if it can.
1035 if (kDefaultProvideSwapFile) {
1036 return true;
1037 }
1038
1039 bool is_low_mem = check_boolean_property("ro.config.low_ram");
1040 if (is_low_mem) {
1041 return true;
1042 }
1043
1044 // Default value must be false here.
1045 return kDefaultProvideSwapFile;
1046 }
1047
1048 /*
1049 * Computes the odex file for the given apk_path and instruction_set.
1050 * /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex
1051 *
1052 * Returns false if it failed to determine the odex file path.
1053 */
calculate_odex_file_path(char path[PKG_PATH_MAX],const char * apk_path,const char * instruction_set)1054 static bool calculate_odex_file_path(char path[PKG_PATH_MAX],
1055 const char *apk_path,
1056 const char *instruction_set)
1057 {
1058 if (strlen(apk_path) + strlen("oat/") + strlen(instruction_set)
1059 + strlen("/") + strlen("odex") + 1 > PKG_PATH_MAX) {
1060 ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path);
1061 return false;
1062 }
1063
1064 strcpy(path, apk_path);
1065 char *end = strrchr(path, '/');
1066 if (end == NULL) {
1067 ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path);
1068 return false;
1069 }
1070 const char *apk_end = apk_path + (end - path); // strrchr(apk_path, '/');
1071
1072 strcpy(end + 1, "oat/"); // path = /system/framework/oat/\0
1073 strcat(path, instruction_set); // path = /system/framework/oat/<isa>\0
1074 strcat(path, apk_end); // path = /system/framework/oat/<isa>/whatever.jar\0
1075 end = strrchr(path, '.');
1076 if (end == NULL) {
1077 ALOGE("apk_path '%s' has no extension.\n", apk_path);
1078 return false;
1079 }
1080 strcpy(end + 1, "odex");
1081 return true;
1082 }
1083
SetDex2OatAndPatchOatScheduling(bool set_to_bg)1084 static void SetDex2OatAndPatchOatScheduling(bool set_to_bg) {
1085 if (set_to_bg) {
1086 if (set_sched_policy(0, SP_BACKGROUND) < 0) {
1087 ALOGE("set_sched_policy failed: %s\n", strerror(errno));
1088 exit(70);
1089 }
1090 if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) {
1091 ALOGE("setpriority failed: %s\n", strerror(errno));
1092 exit(71);
1093 }
1094 }
1095 }
1096
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,bool boot_complete)1097 int dexopt(const char *apk_path, uid_t uid, bool is_public,
1098 const char *pkgname, const char *instruction_set, int dexopt_needed,
1099 bool vm_safe_mode, bool debuggable, const char* oat_dir, bool boot_complete)
1100 {
1101 struct utimbuf ut;
1102 struct stat input_stat;
1103 char out_path[PKG_PATH_MAX];
1104 char swap_file_name[PKG_PATH_MAX];
1105 const char *input_file;
1106 char in_odex_path[PKG_PATH_MAX];
1107 int res, input_fd=-1, out_fd=-1, swap_fd=-1;
1108
1109 // Early best-effort check whether we can fit the the path into our buffers.
1110 // Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run
1111 // without a swap file, if necessary.
1112 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
1113 ALOGE("apk_path too long '%s'\n", apk_path);
1114 return -1;
1115 }
1116
1117 if (oat_dir != NULL && oat_dir[0] != '!') {
1118 if (validate_apk_path(oat_dir)) {
1119 ALOGE("invalid oat_dir '%s'\n", oat_dir);
1120 return -1;
1121 }
1122 if (calculate_oat_file_path(out_path, oat_dir, apk_path, instruction_set)) {
1123 return -1;
1124 }
1125 } else {
1126 if (create_cache_path(out_path, apk_path, instruction_set)) {
1127 return -1;
1128 }
1129 }
1130
1131 switch (dexopt_needed) {
1132 case DEXOPT_DEX2OAT_NEEDED:
1133 input_file = apk_path;
1134 break;
1135
1136 case DEXOPT_PATCHOAT_NEEDED:
1137 if (!calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) {
1138 return -1;
1139 }
1140 input_file = in_odex_path;
1141 break;
1142
1143 case DEXOPT_SELF_PATCHOAT_NEEDED:
1144 input_file = out_path;
1145 break;
1146
1147 default:
1148 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
1149 exit(72);
1150 }
1151
1152 memset(&input_stat, 0, sizeof(input_stat));
1153 stat(input_file, &input_stat);
1154
1155 input_fd = open(input_file, O_RDONLY, 0);
1156 if (input_fd < 0) {
1157 ALOGE("installd cannot open '%s' for input during dexopt\n", input_file);
1158 return -1;
1159 }
1160
1161 unlink(out_path);
1162 out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644);
1163 if (out_fd < 0) {
1164 ALOGE("installd cannot open '%s' for output during dexopt\n", out_path);
1165 goto fail;
1166 }
1167 if (fchmod(out_fd,
1168 S_IRUSR|S_IWUSR|S_IRGRP |
1169 (is_public ? S_IROTH : 0)) < 0) {
1170 ALOGE("installd cannot chmod '%s' during dexopt\n", out_path);
1171 goto fail;
1172 }
1173 if (fchown(out_fd, AID_SYSTEM, uid) < 0) {
1174 ALOGE("installd cannot chown '%s' during dexopt\n", out_path);
1175 goto fail;
1176 }
1177
1178 // Create profile file if there is a package name present.
1179 if (strcmp(pkgname, "*") != 0) {
1180 create_profile_file(pkgname, uid);
1181 }
1182
1183 // Create a swap file if necessary.
1184 if (ShouldUseSwapFileForDexopt()) {
1185 // Make sure there really is enough space.
1186 size_t out_len = strlen(out_path);
1187 if (out_len + strlen(".swap") + 1 <= PKG_PATH_MAX) {
1188 strcpy(swap_file_name, out_path);
1189 strcpy(swap_file_name + strlen(out_path), ".swap");
1190 unlink(swap_file_name);
1191 swap_fd = open(swap_file_name, O_RDWR | O_CREAT | O_EXCL, 0600);
1192 if (swap_fd < 0) {
1193 // Could not create swap file. Optimistically go on and hope that we can compile
1194 // without it.
1195 ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name);
1196 } else {
1197 // Immediately unlink. We don't really want to hit flash.
1198 unlink(swap_file_name);
1199 }
1200 } else {
1201 // Swap file path is too long. Try to run without.
1202 ALOGE("installd could not create swap file for path %s during dexopt\n", out_path);
1203 }
1204 }
1205
1206 ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file);
1207
1208 pid_t pid;
1209 pid = fork();
1210 if (pid == 0) {
1211 /* child -- drop privileges before continuing */
1212 if (setgid(uid) != 0) {
1213 ALOGE("setgid(%d) failed in installd during dexopt\n", uid);
1214 exit(64);
1215 }
1216 if (setuid(uid) != 0) {
1217 ALOGE("setuid(%d) failed in installd during dexopt\n", uid);
1218 exit(65);
1219 }
1220 // drop capabilities
1221 struct __user_cap_header_struct capheader;
1222 struct __user_cap_data_struct capdata[2];
1223 memset(&capheader, 0, sizeof(capheader));
1224 memset(&capdata, 0, sizeof(capdata));
1225 capheader.version = _LINUX_CAPABILITY_VERSION_3;
1226 if (capset(&capheader, &capdata[0]) < 0) {
1227 ALOGE("capset failed: %s\n", strerror(errno));
1228 exit(66);
1229 }
1230 SetDex2OatAndPatchOatScheduling(boot_complete);
1231 if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) {
1232 ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno));
1233 exit(67);
1234 }
1235
1236 if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED
1237 || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) {
1238 run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set);
1239 } else if (dexopt_needed == DEXOPT_DEX2OAT_NEEDED) {
1240 const char *input_file_name = strrchr(input_file, '/');
1241 if (input_file_name == NULL) {
1242 input_file_name = input_file;
1243 } else {
1244 input_file_name++;
1245 }
1246 run_dex2oat(input_fd, out_fd, input_file_name, out_path, swap_fd, pkgname,
1247 instruction_set, vm_safe_mode, debuggable, boot_complete);
1248 } else {
1249 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed);
1250 exit(73);
1251 }
1252 exit(68); /* only get here on exec failure */
1253 } else {
1254 res = wait_child(pid);
1255 if (res == 0) {
1256 ALOGV("DexInv: --- END '%s' (success) ---\n", input_file);
1257 } else {
1258 ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res);
1259 goto fail;
1260 }
1261 }
1262
1263 ut.actime = input_stat.st_atime;
1264 ut.modtime = input_stat.st_mtime;
1265 utime(out_path, &ut);
1266
1267 close(out_fd);
1268 close(input_fd);
1269 if (swap_fd != -1) {
1270 close(swap_fd);
1271 }
1272 return 0;
1273
1274 fail:
1275 if (out_fd >= 0) {
1276 close(out_fd);
1277 unlink(out_path);
1278 }
1279 if (input_fd >= 0) {
1280 close(input_fd);
1281 }
1282 return -1;
1283 }
1284
mark_boot_complete(const char * instruction_set)1285 int mark_boot_complete(const char* instruction_set)
1286 {
1287 char boot_marker_path[PKG_PATH_MAX];
1288 sprintf(boot_marker_path,"%s%s/.booting", DALVIK_CACHE_PREFIX, instruction_set);
1289
1290 ALOGV("mark_boot_complete : %s", boot_marker_path);
1291 if (unlink(boot_marker_path) != 0) {
1292 ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path,
1293 strerror(errno));
1294 return -1;
1295 }
1296
1297 return 0;
1298 }
1299
mkinnerdirs(char * path,int basepos,mode_t mode,int uid,int gid,struct stat * statbuf)1300 void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
1301 struct stat* statbuf)
1302 {
1303 while (path[basepos] != 0) {
1304 if (path[basepos] == '/') {
1305 path[basepos] = 0;
1306 if (lstat(path, statbuf) < 0) {
1307 ALOGV("Making directory: %s\n", path);
1308 if (mkdir(path, mode) == 0) {
1309 chown(path, uid, gid);
1310 } else {
1311 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
1312 }
1313 }
1314 path[basepos] = '/';
1315 basepos++;
1316 }
1317 basepos++;
1318 }
1319 }
1320
movefileordir(char * srcpath,char * dstpath,int dstbasepos,int dstuid,int dstgid,struct stat * statbuf)1321 int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
1322 int dstuid, int dstgid, struct stat* statbuf)
1323 {
1324 DIR *d;
1325 struct dirent *de;
1326 int res;
1327
1328 int srcend = strlen(srcpath);
1329 int dstend = strlen(dstpath);
1330
1331 if (lstat(srcpath, statbuf) < 0) {
1332 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
1333 return 1;
1334 }
1335
1336 if ((statbuf->st_mode&S_IFDIR) == 0) {
1337 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
1338 dstuid, dstgid, statbuf);
1339 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
1340 if (rename(srcpath, dstpath) >= 0) {
1341 if (chown(dstpath, dstuid, dstgid) < 0) {
1342 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
1343 unlink(dstpath);
1344 return 1;
1345 }
1346 } else {
1347 ALOGW("Unable to rename %s to %s: %s\n",
1348 srcpath, dstpath, strerror(errno));
1349 return 1;
1350 }
1351 return 0;
1352 }
1353
1354 d = opendir(srcpath);
1355 if (d == NULL) {
1356 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
1357 return 1;
1358 }
1359
1360 res = 0;
1361
1362 while ((de = readdir(d))) {
1363 const char *name = de->d_name;
1364 /* always skip "." and ".." */
1365 if (name[0] == '.') {
1366 if (name[1] == 0) continue;
1367 if ((name[1] == '.') && (name[2] == 0)) continue;
1368 }
1369
1370 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
1371 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
1372 continue;
1373 }
1374
1375 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
1376 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
1377 continue;
1378 }
1379
1380 srcpath[srcend] = dstpath[dstend] = '/';
1381 strcpy(srcpath+srcend+1, name);
1382 strcpy(dstpath+dstend+1, name);
1383
1384 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
1385 res = 1;
1386 }
1387
1388 // Note: we will be leaving empty directories behind in srcpath,
1389 // but that is okay, the package manager will be erasing all of the
1390 // data associated with .apks that disappear.
1391
1392 srcpath[srcend] = dstpath[dstend] = 0;
1393 }
1394
1395 closedir(d);
1396 return res;
1397 }
1398
movefiles()1399 int movefiles()
1400 {
1401 DIR *d;
1402 int dfd, subfd;
1403 struct dirent *de;
1404 struct stat s;
1405 char buf[PKG_PATH_MAX+1];
1406 int bufp, bufe, bufi, readlen;
1407
1408 char srcpkg[PKG_NAME_MAX];
1409 char dstpkg[PKG_NAME_MAX];
1410 char srcpath[PKG_PATH_MAX];
1411 char dstpath[PKG_PATH_MAX];
1412 int dstuid=-1, dstgid=-1;
1413 int hasspace;
1414
1415 d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
1416 if (d == NULL) {
1417 goto done;
1418 }
1419 dfd = dirfd(d);
1420
1421 /* Iterate through all files in the directory, executing the
1422 * file movements requested there-in.
1423 */
1424 while ((de = readdir(d))) {
1425 const char *name = de->d_name;
1426
1427 if (de->d_type == DT_DIR) {
1428 continue;
1429 } else {
1430 subfd = openat(dfd, name, O_RDONLY);
1431 if (subfd < 0) {
1432 ALOGW("Unable to open update commands at %s%s\n",
1433 UPDATE_COMMANDS_DIR_PREFIX, name);
1434 continue;
1435 }
1436
1437 bufp = 0;
1438 bufe = 0;
1439 buf[PKG_PATH_MAX] = 0;
1440 srcpkg[0] = dstpkg[0] = 0;
1441 while (1) {
1442 bufi = bufp;
1443 while (bufi < bufe && buf[bufi] != '\n') {
1444 bufi++;
1445 }
1446 if (bufi < bufe) {
1447 buf[bufi] = 0;
1448 ALOGV("Processing line: %s\n", buf+bufp);
1449 hasspace = 0;
1450 while (bufp < bufi && isspace(buf[bufp])) {
1451 hasspace = 1;
1452 bufp++;
1453 }
1454 if (buf[bufp] == '#' || bufp == bufi) {
1455 // skip comments and empty lines.
1456 } else if (hasspace) {
1457 if (dstpkg[0] == 0) {
1458 ALOGW("Path before package line in %s%s: %s\n",
1459 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1460 } else if (srcpkg[0] == 0) {
1461 // Skip -- source package no longer exists.
1462 } else {
1463 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
1464 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
1465 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
1466 movefileordir(srcpath, dstpath,
1467 strlen(dstpath)-strlen(buf+bufp),
1468 dstuid, dstgid, &s);
1469 }
1470 }
1471 } else {
1472 char* div = strchr(buf+bufp, ':');
1473 if (div == NULL) {
1474 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
1475 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1476 } else {
1477 *div = 0;
1478 div++;
1479 if (strlen(buf+bufp) < PKG_NAME_MAX) {
1480 strcpy(dstpkg, buf+bufp);
1481 } else {
1482 srcpkg[0] = dstpkg[0] = 0;
1483 ALOGW("Package name too long in %s%s: %s\n",
1484 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
1485 }
1486 if (strlen(div) < PKG_NAME_MAX) {
1487 strcpy(srcpkg, div);
1488 } else {
1489 srcpkg[0] = dstpkg[0] = 0;
1490 ALOGW("Package name too long in %s%s: %s\n",
1491 UPDATE_COMMANDS_DIR_PREFIX, name, div);
1492 }
1493 if (srcpkg[0] != 0) {
1494 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
1495 if (lstat(srcpath, &s) < 0) {
1496 // Package no longer exists -- skip.
1497 srcpkg[0] = 0;
1498 }
1499 } else {
1500 srcpkg[0] = 0;
1501 ALOGW("Can't create path %s in %s%s\n",
1502 div, UPDATE_COMMANDS_DIR_PREFIX, name);
1503 }
1504 if (srcpkg[0] != 0) {
1505 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
1506 if (lstat(dstpath, &s) == 0) {
1507 dstuid = s.st_uid;
1508 dstgid = s.st_gid;
1509 } else {
1510 // Destination package doesn't
1511 // exist... due to original-package,
1512 // this is normal, so don't be
1513 // noisy about it.
1514 srcpkg[0] = 0;
1515 }
1516 } else {
1517 srcpkg[0] = 0;
1518 ALOGW("Can't create path %s in %s%s\n",
1519 div, UPDATE_COMMANDS_DIR_PREFIX, name);
1520 }
1521 }
1522 ALOGV("Transfering from %s to %s: uid=%d\n",
1523 srcpkg, dstpkg, dstuid);
1524 }
1525 }
1526 }
1527 bufp = bufi+1;
1528 } else {
1529 if (bufp == 0) {
1530 if (bufp < bufe) {
1531 ALOGW("Line too long in %s%s, skipping: %s\n",
1532 UPDATE_COMMANDS_DIR_PREFIX, name, buf);
1533 }
1534 } else if (bufp < bufe) {
1535 memcpy(buf, buf+bufp, bufe-bufp);
1536 bufe -= bufp;
1537 bufp = 0;
1538 }
1539 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
1540 if (readlen < 0) {
1541 ALOGW("Failure reading update commands in %s%s: %s\n",
1542 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
1543 break;
1544 } else if (readlen == 0) {
1545 break;
1546 }
1547 bufe += readlen;
1548 buf[bufe] = 0;
1549 ALOGV("Read buf: %s\n", buf);
1550 }
1551 }
1552 close(subfd);
1553 }
1554 }
1555 closedir(d);
1556 done:
1557 return 0;
1558 }
1559
linklib(const char * uuid,const char * pkgname,const char * asecLibDir,int userId)1560 int linklib(const char* uuid, const char* pkgname, const char* asecLibDir, int userId)
1561 {
1562 struct stat s, libStat;
1563 int rc = 0;
1564
1565 std::string _pkgdir(create_data_user_package_path(uuid, userId, pkgname));
1566 std::string _libsymlink(_pkgdir + PKG_LIB_POSTFIX);
1567
1568 const char* pkgdir = _pkgdir.c_str();
1569 const char* libsymlink = _libsymlink.c_str();
1570
1571 if (stat(pkgdir, &s) < 0) return -1;
1572
1573 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
1574 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
1575 return -1;
1576 }
1577
1578 if (chmod(pkgdir, 0700) < 0) {
1579 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1580 rc = -1;
1581 goto out;
1582 }
1583
1584 if (lstat(libsymlink, &libStat) < 0) {
1585 if (errno != ENOENT) {
1586 ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1587 rc = -1;
1588 goto out;
1589 }
1590 } else {
1591 if (S_ISDIR(libStat.st_mode)) {
1592 if (delete_dir_contents(libsymlink, 1, NULL) < 0) {
1593 rc = -1;
1594 goto out;
1595 }
1596 } else if (S_ISLNK(libStat.st_mode)) {
1597 if (unlink(libsymlink) < 0) {
1598 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
1599 rc = -1;
1600 goto out;
1601 }
1602 }
1603 }
1604
1605 if (symlink(asecLibDir, libsymlink) < 0) {
1606 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
1607 strerror(errno));
1608 rc = -errno;
1609 goto out;
1610 }
1611
1612 out:
1613 if (chmod(pkgdir, s.st_mode) < 0) {
1614 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1615 rc = -errno;
1616 }
1617
1618 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1619 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
1620 return -errno;
1621 }
1622
1623 return rc;
1624 }
1625
run_idmap(const char * target_apk,const char * overlay_apk,int idmap_fd)1626 static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd)
1627 {
1628 static const char *IDMAP_BIN = "/system/bin/idmap";
1629 static const size_t MAX_INT_LEN = 32;
1630 char idmap_str[MAX_INT_LEN];
1631
1632 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd);
1633
1634 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL);
1635 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno));
1636 }
1637
1638 // Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix)
1639 // 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)1640 static int flatten_path(const char *prefix, const char *suffix,
1641 const char *overlay_path, char *idmap_path, size_t N)
1642 {
1643 if (overlay_path == NULL || idmap_path == NULL) {
1644 return -1;
1645 }
1646 const size_t len_overlay_path = strlen(overlay_path);
1647 // will access overlay_path + 1 further below; requires absolute path
1648 if (len_overlay_path < 2 || *overlay_path != '/') {
1649 return -1;
1650 }
1651 const size_t len_idmap_root = strlen(prefix);
1652 const size_t len_suffix = strlen(suffix);
1653 if (SIZE_MAX - len_idmap_root < len_overlay_path ||
1654 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) {
1655 // additions below would cause overflow
1656 return -1;
1657 }
1658 if (N < len_idmap_root + len_overlay_path + len_suffix) {
1659 return -1;
1660 }
1661 memset(idmap_path, 0, N);
1662 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix);
1663 char *ch = idmap_path + len_idmap_root;
1664 while (*ch != '\0') {
1665 if (*ch == '/') {
1666 *ch = '@';
1667 }
1668 ++ch;
1669 }
1670 return 0;
1671 }
1672
idmap(const char * target_apk,const char * overlay_apk,uid_t uid)1673 int idmap(const char *target_apk, const char *overlay_apk, uid_t uid)
1674 {
1675 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid);
1676
1677 int idmap_fd = -1;
1678 char idmap_path[PATH_MAX];
1679
1680 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk,
1681 idmap_path, sizeof(idmap_path)) == -1) {
1682 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk);
1683 goto fail;
1684 }
1685
1686 unlink(idmap_path);
1687 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644);
1688 if (idmap_fd < 0) {
1689 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno));
1690 goto fail;
1691 }
1692 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) {
1693 ALOGE("idmap cannot chown '%s'\n", idmap_path);
1694 goto fail;
1695 }
1696 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) {
1697 ALOGE("idmap cannot chmod '%s'\n", idmap_path);
1698 goto fail;
1699 }
1700
1701 pid_t pid;
1702 pid = fork();
1703 if (pid == 0) {
1704 /* child -- drop privileges before continuing */
1705 if (setgid(uid) != 0) {
1706 ALOGE("setgid(%d) failed during idmap\n", uid);
1707 exit(1);
1708 }
1709 if (setuid(uid) != 0) {
1710 ALOGE("setuid(%d) failed during idmap\n", uid);
1711 exit(1);
1712 }
1713 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) {
1714 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno));
1715 exit(1);
1716 }
1717
1718 run_idmap(target_apk, overlay_apk, idmap_fd);
1719 exit(1); /* only if exec call to idmap failed */
1720 } else {
1721 int status = wait_child(pid);
1722 if (status != 0) {
1723 ALOGE("idmap failed, status=0x%04x\n", status);
1724 goto fail;
1725 }
1726 }
1727
1728 close(idmap_fd);
1729 return 0;
1730 fail:
1731 if (idmap_fd >= 0) {
1732 close(idmap_fd);
1733 unlink(idmap_path);
1734 }
1735 return -1;
1736 }
1737
restorecon_data(const char * uuid,const char * pkgName,const char * seinfo,uid_t uid)1738 int restorecon_data(const char* uuid, const char* pkgName,
1739 const char* seinfo, uid_t uid)
1740 {
1741 struct dirent *entry;
1742 DIR *d;
1743 struct stat s;
1744 int ret = 0;
1745
1746 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here.
1747 unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE;
1748
1749 if (!pkgName || !seinfo) {
1750 ALOGE("Package name or seinfo tag is null when trying to restorecon.");
1751 return -1;
1752 }
1753
1754 // Special case for owner on internal storage
1755 if (uuid == nullptr) {
1756 std::string path(create_data_user_package_path(nullptr, 0, pkgName));
1757
1758 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, flags) < 0) {
1759 PLOG(ERROR) << "restorecon failed for " << path;
1760 ret |= -1;
1761 }
1762 }
1763
1764 // Relabel package directory for all secondary users.
1765 std::string userdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX);
1766 d = opendir(userdir.c_str());
1767 if (d == NULL) {
1768 return -1;
1769 }
1770
1771 while ((entry = readdir(d))) {
1772 if (entry->d_type != DT_DIR) {
1773 continue;
1774 }
1775
1776 const char *user = entry->d_name;
1777 // Ignore "." and ".."
1778 if (!strcmp(user, ".") || !strcmp(user, "..")) {
1779 continue;
1780 }
1781
1782 // user directories start with a number
1783 if (user[0] < '0' || user[0] > '9') {
1784 ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user);
1785 continue;
1786 }
1787
1788 std::string pkgdir(StringPrintf("%s%s/%s", userdir.c_str(), user, pkgName));
1789 if (stat(pkgdir.c_str(), &s) < 0) {
1790 continue;
1791 }
1792
1793 if (selinux_android_restorecon_pkgdir(pkgdir.c_str(), seinfo, s.st_uid, flags) < 0) {
1794 PLOG(ERROR) << "restorecon failed for " << pkgdir;
1795 ret |= -1;
1796 }
1797 }
1798
1799 closedir(d);
1800 return ret;
1801 }
1802
create_oat_dir(const char * oat_dir,const char * instruction_set)1803 int create_oat_dir(const char* oat_dir, const char* instruction_set)
1804 {
1805 char oat_instr_dir[PKG_PATH_MAX];
1806
1807 if (validate_apk_path(oat_dir)) {
1808 ALOGE("invalid apk path '%s' (bad prefix)\n", oat_dir);
1809 return -1;
1810 }
1811 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1812 return -1;
1813 }
1814 if (selinux_android_restorecon(oat_dir, 0)) {
1815 ALOGE("cannot restorecon dir '%s': %s\n", oat_dir, strerror(errno));
1816 return -1;
1817 }
1818 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set);
1819 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) {
1820 return -1;
1821 }
1822 return 0;
1823 }
1824
rm_package_dir(const char * apk_path)1825 int rm_package_dir(const char* apk_path)
1826 {
1827 if (validate_apk_path(apk_path)) {
1828 ALOGE("invalid apk path '%s' (bad prefix)\n", apk_path);
1829 return -1;
1830 }
1831 return delete_dir_contents(apk_path, 1 /* also_delete_dir */ , NULL /* exclusion_predicate */);
1832 }
1833
link_file(const char * relative_path,const char * from_base,const char * to_base)1834 int link_file(const char* relative_path, const char* from_base, const char* to_base) {
1835 char from_path[PKG_PATH_MAX];
1836 char to_path[PKG_PATH_MAX];
1837 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path);
1838 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path);
1839
1840 if (validate_apk_path_subdirs(from_path)) {
1841 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path);
1842 return -1;
1843 }
1844
1845 if (validate_apk_path_subdirs(to_path)) {
1846 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path);
1847 return -1;
1848 }
1849
1850 const int ret = link(from_path, to_path);
1851 if (ret < 0) {
1852 ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno));
1853 return -1;
1854 }
1855
1856 return 0;
1857 }
1858
calculate_oat_file_path(char path[PKG_PATH_MAX],const char * oat_dir,const char * apk_path,const char * instruction_set)1859 int calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path,
1860 const char *instruction_set) {
1861 char *file_name_start;
1862 char *file_name_end;
1863
1864 file_name_start = strrchr(apk_path, '/');
1865 if (file_name_start == NULL) {
1866 ALOGE("apk_path '%s' has no '/'s in it\n", apk_path);
1867 return -1;
1868 }
1869 file_name_end = strrchr(apk_path, '.');
1870 if (file_name_end < file_name_start) {
1871 ALOGE("apk_path '%s' has no extension\n", apk_path);
1872 return -1;
1873 }
1874
1875 // Calculate file_name
1876 int file_name_len = file_name_end - file_name_start - 1;
1877 char file_name[file_name_len + 1];
1878 memcpy(file_name, file_name_start + 1, file_name_len);
1879 file_name[file_name_len] = '\0';
1880
1881 // <apk_parent_dir>/oat/<isa>/<file_name>.odex
1882 snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name);
1883 return 0;
1884 }
1885