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 <sys/capability.h>
18 #include "installd.h"
19 #include <diskusage/dirsize.h>
20 #include <selinux/android.h>
21
22 /* Directory records that are used in execution of commands. */
23 dir_rec_t android_data_dir;
24 dir_rec_t android_asec_dir;
25 dir_rec_t android_app_dir;
26 dir_rec_t android_app_private_dir;
27 dir_rec_t android_app_lib_dir;
28 dir_rec_t android_media_dir;
29 dir_rec_array_t android_system_dirs;
30
install(const char * pkgname,uid_t uid,gid_t gid,const char * seinfo)31 int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo)
32 {
33 char pkgdir[PKG_PATH_MAX];
34 char libsymlink[PKG_PATH_MAX];
35 char applibdir[PKG_PATH_MAX];
36 struct stat libStat;
37
38 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
39 ALOGE("invalid uid/gid: %d %d\n", uid, gid);
40 return -1;
41 }
42
43 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
44 ALOGE("cannot create package path\n");
45 return -1;
46 }
47
48 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) {
49 ALOGE("cannot create package lib symlink origin path\n");
50 return -1;
51 }
52
53 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
54 ALOGE("cannot create package lib symlink dest path\n");
55 return -1;
56 }
57
58 if (mkdir(pkgdir, 0751) < 0) {
59 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
60 return -1;
61 }
62 if (chmod(pkgdir, 0751) < 0) {
63 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
64 unlink(pkgdir);
65 return -1;
66 }
67
68 if (lstat(libsymlink, &libStat) < 0) {
69 if (errno != ENOENT) {
70 ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
71 return -1;
72 }
73 } else {
74 if (S_ISDIR(libStat.st_mode)) {
75 if (delete_dir_contents(libsymlink, 1, 0) < 0) {
76 ALOGE("couldn't delete lib directory during install for: %s", libsymlink);
77 return -1;
78 }
79 } else if (S_ISLNK(libStat.st_mode)) {
80 if (unlink(libsymlink) < 0) {
81 ALOGE("couldn't unlink lib directory during install for: %s", libsymlink);
82 return -1;
83 }
84 }
85 }
86
87 if (symlink(applibdir, libsymlink) < 0) {
88 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir,
89 strerror(errno));
90 unlink(pkgdir);
91 return -1;
92 }
93
94 if (selinux_android_setfilecon2(pkgdir, pkgname, seinfo, uid) < 0) {
95 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
96 unlink(libsymlink);
97 unlink(pkgdir);
98 return -errno;
99 }
100
101 if (chown(pkgdir, uid, gid) < 0) {
102 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
103 unlink(libsymlink);
104 unlink(pkgdir);
105 return -1;
106 }
107
108 return 0;
109 }
110
uninstall(const char * pkgname,uid_t persona)111 int uninstall(const char *pkgname, uid_t persona)
112 {
113 char pkgdir[PKG_PATH_MAX];
114
115 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
116 return -1;
117
118 /* delete contents AND directory, no exceptions */
119 return delete_dir_contents(pkgdir, 1, NULL);
120 }
121
renamepkg(const char * oldpkgname,const char * newpkgname)122 int renamepkg(const char *oldpkgname, const char *newpkgname)
123 {
124 char oldpkgdir[PKG_PATH_MAX];
125 char newpkgdir[PKG_PATH_MAX];
126
127 if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0))
128 return -1;
129 if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0))
130 return -1;
131
132 if (rename(oldpkgdir, newpkgdir) < 0) {
133 ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno));
134 return -errno;
135 }
136 return 0;
137 }
138
fix_uid(const char * pkgname,uid_t uid,gid_t gid)139 int fix_uid(const char *pkgname, uid_t uid, gid_t gid)
140 {
141 char pkgdir[PKG_PATH_MAX];
142 struct stat s;
143 int rc = 0;
144
145 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) {
146 ALOGE("invalid uid/gid: %d %d\n", uid, gid);
147 return -1;
148 }
149
150 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) {
151 ALOGE("cannot create package path\n");
152 return -1;
153 }
154
155 if (stat(pkgdir, &s) < 0) return -1;
156
157 if (s.st_uid != 0 || s.st_gid != 0) {
158 ALOGE("fixing uid of non-root pkg: %s %lu %lu\n", pkgdir, s.st_uid, s.st_gid);
159 return -1;
160 }
161
162 if (chmod(pkgdir, 0751) < 0) {
163 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
164 unlink(pkgdir);
165 return -errno;
166 }
167 if (chown(pkgdir, uid, gid) < 0) {
168 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
169 unlink(pkgdir);
170 return -errno;
171 }
172
173 return 0;
174 }
175
delete_user_data(const char * pkgname,uid_t persona)176 int delete_user_data(const char *pkgname, uid_t persona)
177 {
178 char pkgdir[PKG_PATH_MAX];
179
180 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona))
181 return -1;
182
183 /* delete contents, excluding "lib", but not the directory itself */
184 return delete_dir_contents(pkgdir, 0, "lib");
185 }
186
make_user_data(const char * pkgname,uid_t uid,uid_t persona)187 int make_user_data(const char *pkgname, uid_t uid, uid_t persona)
188 {
189 char pkgdir[PKG_PATH_MAX];
190 char applibdir[PKG_PATH_MAX];
191 char libsymlink[PKG_PATH_MAX];
192 struct stat libStat;
193
194 // Create the data dir for the package
195 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) {
196 return -1;
197 }
198 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, persona)) {
199 ALOGE("cannot create package lib symlink origin path\n");
200 return -1;
201 }
202 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) {
203 ALOGE("cannot create package lib symlink dest path\n");
204 return -1;
205 }
206
207 if (mkdir(pkgdir, 0751) < 0) {
208 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno));
209 return -errno;
210 }
211 if (chmod(pkgdir, 0751) < 0) {
212 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno));
213 unlink(pkgdir);
214 return -errno;
215 }
216
217 if (lstat(libsymlink, &libStat) < 0) {
218 if (errno != ENOENT) {
219 ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno));
220 unlink(pkgdir);
221 return -1;
222 }
223 } else {
224 if (S_ISDIR(libStat.st_mode)) {
225 if (delete_dir_contents(libsymlink, 1, 0) < 0) {
226 ALOGE("couldn't delete lib directory during install for non-primary: %s",
227 libsymlink);
228 unlink(pkgdir);
229 return -1;
230 }
231 } else if (S_ISLNK(libStat.st_mode)) {
232 if (unlink(libsymlink) < 0) {
233 ALOGE("couldn't unlink lib directory during install for non-primary: %s",
234 libsymlink);
235 unlink(pkgdir);
236 return -1;
237 }
238 }
239 }
240
241 if (symlink(applibdir, libsymlink) < 0) {
242 ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink,
243 applibdir, strerror(errno));
244 unlink(pkgdir);
245 return -1;
246 }
247
248 if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) {
249 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno));
250 unlink(libsymlink);
251 unlink(pkgdir);
252 return -errno;
253 }
254
255 if (chown(pkgdir, uid, uid) < 0) {
256 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno));
257 unlink(libsymlink);
258 unlink(pkgdir);
259 return -errno;
260 }
261
262 return 0;
263 }
264
delete_persona(uid_t persona)265 int delete_persona(uid_t persona)
266 {
267 char data_path[PKG_PATH_MAX];
268 if (create_persona_path(data_path, persona)) {
269 return -1;
270 }
271 if (delete_dir_contents(data_path, 1, NULL)) {
272 return -1;
273 }
274
275 char media_path[PATH_MAX];
276 if (create_persona_media_path(media_path, (userid_t) persona) == -1) {
277 return -1;
278 }
279 if (delete_dir_contents(media_path, 1, NULL) == -1) {
280 return -1;
281 }
282
283 return 0;
284 }
285
delete_cache(const char * pkgname,uid_t persona)286 int delete_cache(const char *pkgname, uid_t persona)
287 {
288 char cachedir[PKG_PATH_MAX];
289
290 if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, persona))
291 return -1;
292
293 /* delete contents, not the directory, no exceptions */
294 return delete_dir_contents(cachedir, 0, 0);
295 }
296
297 /* Try to ensure free_size bytes of storage are available.
298 * Returns 0 on success.
299 * This is rather simple-minded because doing a full LRU would
300 * be potentially memory-intensive, and without atime it would
301 * also require that apps constantly modify file metadata even
302 * when just reading from the cache, which is pretty awful.
303 */
free_cache(int64_t free_size)304 int free_cache(int64_t free_size)
305 {
306 cache_t* cache;
307 int64_t avail;
308 DIR *d;
309 struct dirent *de;
310 char tmpdir[PATH_MAX];
311 char *dirpos;
312
313 avail = data_disk_free();
314 if (avail < 0) return -1;
315
316 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail);
317 if (avail >= free_size) return 0;
318
319 cache = start_cache_collection();
320
321 // Collect cache files for primary user.
322 if (create_persona_path(tmpdir, 0) == 0) {
323 //ALOGI("adding cache files from %s\n", tmpdir);
324 add_cache_files(cache, tmpdir, "cache");
325 }
326
327 // Search for other users and add any cache files from them.
328 snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path,
329 SECONDARY_USER_PREFIX);
330 dirpos = tmpdir + strlen(tmpdir);
331 d = opendir(tmpdir);
332 if (d != NULL) {
333 while ((de = readdir(d))) {
334 if (de->d_type == DT_DIR) {
335 const char *name = de->d_name;
336 /* always skip "." and ".." */
337 if (name[0] == '.') {
338 if (name[1] == 0) continue;
339 if ((name[1] == '.') && (name[2] == 0)) continue;
340 }
341 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
342 strcpy(dirpos, name);
343 //ALOGI("adding cache files from %s\n", tmpdir);
344 add_cache_files(cache, tmpdir, "cache");
345 } else {
346 ALOGW("Path exceeds limit: %s%s", tmpdir, name);
347 }
348 }
349 }
350 closedir(d);
351 }
352
353 // Collect cache files on external storage for all users (if it is mounted as part
354 // of the internal storage).
355 strcpy(tmpdir, android_media_dir.path);
356 dirpos = tmpdir + strlen(tmpdir);
357 d = opendir(tmpdir);
358 if (d != NULL) {
359 while ((de = readdir(d))) {
360 if (de->d_type == DT_DIR) {
361 const char *name = de->d_name;
362 /* skip any dir that doesn't start with a number, so not a user */
363 if (name[0] < '0' || name[0] > '9') {
364 continue;
365 }
366 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) {
367 strcpy(dirpos, name);
368 if (lookup_media_dir(tmpdir, "Android") == 0
369 && lookup_media_dir(tmpdir, "data") == 0) {
370 //ALOGI("adding cache files from %s\n", tmpdir);
371 add_cache_files(cache, tmpdir, "cache");
372 }
373 } else {
374 ALOGW("Path exceeds limit: %s%s", tmpdir, name);
375 }
376 }
377 }
378 closedir(d);
379 }
380
381 clear_cache_files(cache, free_size);
382 finish_cache_collection(cache);
383
384 return data_disk_free() >= free_size ? 0 : -1;
385 }
386
move_dex(const char * src,const char * dst)387 int move_dex(const char *src, const char *dst)
388 {
389 char src_dex[PKG_PATH_MAX];
390 char dst_dex[PKG_PATH_MAX];
391
392 if (validate_apk_path(src)) return -1;
393 if (validate_apk_path(dst)) return -1;
394
395 if (create_cache_path(src_dex, src)) return -1;
396 if (create_cache_path(dst_dex, dst)) return -1;
397
398 ALOGV("move %s -> %s\n", src_dex, dst_dex);
399 if (rename(src_dex, dst_dex) < 0) {
400 ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno));
401 return -1;
402 } else {
403 return 0;
404 }
405 }
406
rm_dex(const char * path)407 int rm_dex(const char *path)
408 {
409 char dex_path[PKG_PATH_MAX];
410
411 if (validate_apk_path(path)) return -1;
412 if (create_cache_path(dex_path, path)) return -1;
413
414 ALOGV("unlink %s\n", dex_path);
415 if (unlink(dex_path) < 0) {
416 ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno));
417 return -1;
418 } else {
419 return 0;
420 }
421 }
422
get_size(const char * pkgname,int persona,const char * apkpath,const char * libdirpath,const char * fwdlock_apkpath,const char * asecpath,int64_t * _codesize,int64_t * _datasize,int64_t * _cachesize,int64_t * _asecsize)423 int get_size(const char *pkgname, int persona, const char *apkpath,
424 const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath,
425 int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize,
426 int64_t* _asecsize)
427 {
428 DIR *d;
429 int dfd;
430 struct dirent *de;
431 struct stat s;
432 char path[PKG_PATH_MAX];
433
434 int64_t codesize = 0;
435 int64_t datasize = 0;
436 int64_t cachesize = 0;
437 int64_t asecsize = 0;
438
439 /* count the source apk as code -- but only if it's not
440 * on the /system partition and its not on the sdcard.
441 */
442 if (validate_system_app_path(apkpath) &&
443 strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) {
444 if (stat(apkpath, &s) == 0) {
445 codesize += stat_size(&s);
446 }
447 }
448 /* count the forward locked apk as code if it is given
449 */
450 if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') {
451 if (stat(fwdlock_apkpath, &s) == 0) {
452 codesize += stat_size(&s);
453 }
454 }
455 /* count the cached dexfile as code */
456 if (!create_cache_path(path, apkpath)) {
457 if (stat(path, &s) == 0) {
458 codesize += stat_size(&s);
459 }
460 }
461
462 /* add in size of any libraries */
463 if (libdirpath != NULL && libdirpath[0] != '!') {
464 d = opendir(libdirpath);
465 if (d != NULL) {
466 dfd = dirfd(d);
467 codesize += calculate_dir_size(dfd);
468 closedir(d);
469 }
470 }
471
472 /* compute asec size if it is given
473 */
474 if (asecpath != NULL && asecpath[0] != '!') {
475 if (stat(asecpath, &s) == 0) {
476 asecsize += stat_size(&s);
477 }
478 }
479
480 if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, persona)) {
481 goto done;
482 }
483
484 d = opendir(path);
485 if (d == NULL) {
486 goto done;
487 }
488 dfd = dirfd(d);
489
490 /* most stuff in the pkgdir is data, except for the "cache"
491 * directory and below, which is cache, and the "lib" directory
492 * and below, which is code...
493 */
494 while ((de = readdir(d))) {
495 const char *name = de->d_name;
496
497 if (de->d_type == DT_DIR) {
498 int subfd;
499 int64_t statsize = 0;
500 int64_t dirsize = 0;
501 /* always skip "." and ".." */
502 if (name[0] == '.') {
503 if (name[1] == 0) continue;
504 if ((name[1] == '.') && (name[2] == 0)) continue;
505 }
506 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
507 statsize = stat_size(&s);
508 }
509 subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY);
510 if (subfd >= 0) {
511 dirsize = calculate_dir_size(subfd);
512 }
513 if(!strcmp(name,"lib")) {
514 codesize += dirsize + statsize;
515 } else if(!strcmp(name,"cache")) {
516 cachesize += dirsize + statsize;
517 } else {
518 datasize += dirsize + statsize;
519 }
520 } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) {
521 // This is the symbolic link to the application's library
522 // code. We'll count this as code instead of data, since
523 // it is not something that the app creates.
524 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
525 codesize += stat_size(&s);
526 }
527 } else {
528 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) {
529 datasize += stat_size(&s);
530 }
531 }
532 }
533 closedir(d);
534 done:
535 *_codesize = codesize;
536 *_datasize = datasize;
537 *_cachesize = cachesize;
538 *_asecsize = asecsize;
539 return 0;
540 }
541
542
543 /* a simpler version of dexOptGenerateCacheFileName() */
create_cache_path(char path[PKG_PATH_MAX],const char * src)544 int create_cache_path(char path[PKG_PATH_MAX], const char *src)
545 {
546 char *tmp;
547 int srclen;
548 int dstlen;
549
550 srclen = strlen(src);
551
552 /* demand that we are an absolute path */
553 if ((src == 0) || (src[0] != '/') || strstr(src,"..")) {
554 return -1;
555 }
556
557 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX?
558 return -1;
559 }
560
561 dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) +
562 strlen(DALVIK_CACHE_POSTFIX) + 1;
563
564 if (dstlen > PKG_PATH_MAX) {
565 return -1;
566 }
567
568 sprintf(path,"%s%s%s",
569 DALVIK_CACHE_PREFIX,
570 src + 1, /* skip the leading / */
571 DALVIK_CACHE_POSTFIX);
572
573 for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) {
574 if (*tmp == '/') {
575 *tmp = '@';
576 }
577 }
578
579 return 0;
580 }
581
run_dexopt(int zip_fd,int odex_fd,const char * input_file_name,const char * dexopt_flags)582 static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name,
583 const char* dexopt_flags)
584 {
585 static const char* DEX_OPT_BIN = "/system/bin/dexopt";
586 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig
587 char zip_num[MAX_INT_LEN];
588 char odex_num[MAX_INT_LEN];
589
590 sprintf(zip_num, "%d", zip_fd);
591 sprintf(odex_num, "%d", odex_fd);
592
593 execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name,
594 dexopt_flags, (char*) NULL);
595 ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno));
596 }
597
wait_dexopt(pid_t pid,const char * apk_path)598 static int wait_dexopt(pid_t pid, const char* apk_path)
599 {
600 int status;
601 pid_t got_pid;
602
603 /*
604 * Wait for the optimization process to finish.
605 */
606 while (1) {
607 got_pid = waitpid(pid, &status, 0);
608 if (got_pid == -1 && errno == EINTR) {
609 printf("waitpid interrupted, retrying\n");
610 } else {
611 break;
612 }
613 }
614 if (got_pid != pid) {
615 ALOGW("waitpid failed: wanted %d, got %d: %s\n",
616 (int) pid, (int) got_pid, strerror(errno));
617 return 1;
618 }
619
620 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
621 ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path);
622 return 0;
623 } else {
624 ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n",
625 apk_path, status);
626 return status; /* always nonzero */
627 }
628 }
629
dexopt(const char * apk_path,uid_t uid,int is_public)630 int dexopt(const char *apk_path, uid_t uid, int is_public)
631 {
632 struct utimbuf ut;
633 struct stat apk_stat, dex_stat;
634 char dex_path[PKG_PATH_MAX];
635 char dexopt_flags[PROPERTY_VALUE_MAX];
636 char *end;
637 int res, zip_fd=-1, odex_fd=-1;
638
639 /* Before anything else: is there a .odex file? If so, we have
640 * pre-optimized the apk and there is nothing to do here.
641 */
642 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) {
643 return -1;
644 }
645
646 /* platform-specific flags affecting optimization and verification */
647 property_get("dalvik.vm.dexopt-flags", dexopt_flags, "");
648
649 strcpy(dex_path, apk_path);
650 end = strrchr(dex_path, '.');
651 if (end != NULL) {
652 strcpy(end, ".odex");
653 if (stat(dex_path, &dex_stat) == 0) {
654 return 0;
655 }
656 }
657
658 if (create_cache_path(dex_path, apk_path)) {
659 return -1;
660 }
661
662 memset(&apk_stat, 0, sizeof(apk_stat));
663 stat(apk_path, &apk_stat);
664
665 zip_fd = open(apk_path, O_RDONLY, 0);
666 if (zip_fd < 0) {
667 ALOGE("dexopt cannot open '%s' for input\n", apk_path);
668 return -1;
669 }
670
671 unlink(dex_path);
672 odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644);
673 if (odex_fd < 0) {
674 ALOGE("dexopt cannot open '%s' for output\n", dex_path);
675 goto fail;
676 }
677 if (fchmod(odex_fd,
678 S_IRUSR|S_IWUSR|S_IRGRP |
679 (is_public ? S_IROTH : 0)) < 0) {
680 ALOGE("dexopt cannot chmod '%s'\n", dex_path);
681 goto fail;
682 }
683 if (fchown(odex_fd, AID_SYSTEM, uid) < 0) {
684 ALOGE("dexopt cannot chown '%s'\n", dex_path);
685 goto fail;
686 }
687
688 ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path);
689
690 pid_t pid;
691 pid = fork();
692 if (pid == 0) {
693 /* child -- drop privileges before continuing */
694 if (setgid(uid) != 0) {
695 ALOGE("setgid(%d) failed during dexopt\n", uid);
696 exit(64);
697 }
698 if (setuid(uid) != 0) {
699 ALOGE("setuid(%d) during dexopt\n", uid);
700 exit(65);
701 }
702 // drop capabilities
703 struct __user_cap_header_struct capheader;
704 struct __user_cap_data_struct capdata[2];
705 memset(&capheader, 0, sizeof(capheader));
706 memset(&capdata, 0, sizeof(capdata));
707 capheader.version = _LINUX_CAPABILITY_VERSION_3;
708 if (capset(&capheader, &capdata[0]) < 0) {
709 ALOGE("capset failed: %s\n", strerror(errno));
710 exit(66);
711 }
712 if (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) {
713 ALOGE("flock(%s) failed: %s\n", dex_path, strerror(errno));
714 exit(67);
715 }
716
717 run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags);
718 exit(68); /* only get here on exec failure */
719 } else {
720 res = wait_dexopt(pid, apk_path);
721 if (res != 0) {
722 ALOGE("dexopt failed on '%s' res = %d\n", dex_path, res);
723 goto fail;
724 }
725 }
726
727 ut.actime = apk_stat.st_atime;
728 ut.modtime = apk_stat.st_mtime;
729 utime(dex_path, &ut);
730
731 close(odex_fd);
732 close(zip_fd);
733 return 0;
734
735 fail:
736 if (odex_fd >= 0) {
737 close(odex_fd);
738 unlink(dex_path);
739 }
740 if (zip_fd >= 0) {
741 close(zip_fd);
742 }
743 return -1;
744 }
745
mkinnerdirs(char * path,int basepos,mode_t mode,int uid,int gid,struct stat * statbuf)746 void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid,
747 struct stat* statbuf)
748 {
749 while (path[basepos] != 0) {
750 if (path[basepos] == '/') {
751 path[basepos] = 0;
752 if (lstat(path, statbuf) < 0) {
753 ALOGV("Making directory: %s\n", path);
754 if (mkdir(path, mode) == 0) {
755 chown(path, uid, gid);
756 } else {
757 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno));
758 }
759 }
760 path[basepos] = '/';
761 basepos++;
762 }
763 basepos++;
764 }
765 }
766
movefileordir(char * srcpath,char * dstpath,int dstbasepos,int dstuid,int dstgid,struct stat * statbuf)767 int movefileordir(char* srcpath, char* dstpath, int dstbasepos,
768 int dstuid, int dstgid, struct stat* statbuf)
769 {
770 DIR *d;
771 struct dirent *de;
772 int res;
773
774 int srcend = strlen(srcpath);
775 int dstend = strlen(dstpath);
776
777 if (lstat(srcpath, statbuf) < 0) {
778 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno));
779 return 1;
780 }
781
782 if ((statbuf->st_mode&S_IFDIR) == 0) {
783 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH,
784 dstuid, dstgid, statbuf);
785 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid);
786 if (rename(srcpath, dstpath) >= 0) {
787 if (chown(dstpath, dstuid, dstgid) < 0) {
788 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno));
789 unlink(dstpath);
790 return 1;
791 }
792 } else {
793 ALOGW("Unable to rename %s to %s: %s\n",
794 srcpath, dstpath, strerror(errno));
795 return 1;
796 }
797 return 0;
798 }
799
800 d = opendir(srcpath);
801 if (d == NULL) {
802 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno));
803 return 1;
804 }
805
806 res = 0;
807
808 while ((de = readdir(d))) {
809 const char *name = de->d_name;
810 /* always skip "." and ".." */
811 if (name[0] == '.') {
812 if (name[1] == 0) continue;
813 if ((name[1] == '.') && (name[2] == 0)) continue;
814 }
815
816 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) {
817 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name);
818 continue;
819 }
820
821 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) {
822 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name);
823 continue;
824 }
825
826 srcpath[srcend] = dstpath[dstend] = '/';
827 strcpy(srcpath+srcend+1, name);
828 strcpy(dstpath+dstend+1, name);
829
830 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) {
831 res = 1;
832 }
833
834 // Note: we will be leaving empty directories behind in srcpath,
835 // but that is okay, the package manager will be erasing all of the
836 // data associated with .apks that disappear.
837
838 srcpath[srcend] = dstpath[dstend] = 0;
839 }
840
841 closedir(d);
842 return res;
843 }
844
movefiles()845 int movefiles()
846 {
847 DIR *d;
848 int dfd, subfd;
849 struct dirent *de;
850 struct stat s;
851 char buf[PKG_PATH_MAX+1];
852 int bufp, bufe, bufi, readlen;
853
854 char srcpkg[PKG_NAME_MAX];
855 char dstpkg[PKG_NAME_MAX];
856 char srcpath[PKG_PATH_MAX];
857 char dstpath[PKG_PATH_MAX];
858 int dstuid=-1, dstgid=-1;
859 int hasspace;
860
861 d = opendir(UPDATE_COMMANDS_DIR_PREFIX);
862 if (d == NULL) {
863 goto done;
864 }
865 dfd = dirfd(d);
866
867 /* Iterate through all files in the directory, executing the
868 * file movements requested there-in.
869 */
870 while ((de = readdir(d))) {
871 const char *name = de->d_name;
872
873 if (de->d_type == DT_DIR) {
874 continue;
875 } else {
876 subfd = openat(dfd, name, O_RDONLY);
877 if (subfd < 0) {
878 ALOGW("Unable to open update commands at %s%s\n",
879 UPDATE_COMMANDS_DIR_PREFIX, name);
880 continue;
881 }
882
883 bufp = 0;
884 bufe = 0;
885 buf[PKG_PATH_MAX] = 0;
886 srcpkg[0] = dstpkg[0] = 0;
887 while (1) {
888 bufi = bufp;
889 while (bufi < bufe && buf[bufi] != '\n') {
890 bufi++;
891 }
892 if (bufi < bufe) {
893 buf[bufi] = 0;
894 ALOGV("Processing line: %s\n", buf+bufp);
895 hasspace = 0;
896 while (bufp < bufi && isspace(buf[bufp])) {
897 hasspace = 1;
898 bufp++;
899 }
900 if (buf[bufp] == '#' || bufp == bufi) {
901 // skip comments and empty lines.
902 } else if (hasspace) {
903 if (dstpkg[0] == 0) {
904 ALOGW("Path before package line in %s%s: %s\n",
905 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
906 } else if (srcpkg[0] == 0) {
907 // Skip -- source package no longer exists.
908 } else {
909 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg);
910 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) &&
911 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) {
912 movefileordir(srcpath, dstpath,
913 strlen(dstpath)-strlen(buf+bufp),
914 dstuid, dstgid, &s);
915 }
916 }
917 } else {
918 char* div = strchr(buf+bufp, ':');
919 if (div == NULL) {
920 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n",
921 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
922 } else {
923 *div = 0;
924 div++;
925 if (strlen(buf+bufp) < PKG_NAME_MAX) {
926 strcpy(dstpkg, buf+bufp);
927 } else {
928 srcpkg[0] = dstpkg[0] = 0;
929 ALOGW("Package name too long in %s%s: %s\n",
930 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp);
931 }
932 if (strlen(div) < PKG_NAME_MAX) {
933 strcpy(srcpkg, div);
934 } else {
935 srcpkg[0] = dstpkg[0] = 0;
936 ALOGW("Package name too long in %s%s: %s\n",
937 UPDATE_COMMANDS_DIR_PREFIX, name, div);
938 }
939 if (srcpkg[0] != 0) {
940 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) {
941 if (lstat(srcpath, &s) < 0) {
942 // Package no longer exists -- skip.
943 srcpkg[0] = 0;
944 }
945 } else {
946 srcpkg[0] = 0;
947 ALOGW("Can't create path %s in %s%s\n",
948 div, UPDATE_COMMANDS_DIR_PREFIX, name);
949 }
950 if (srcpkg[0] != 0) {
951 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) {
952 if (lstat(dstpath, &s) == 0) {
953 dstuid = s.st_uid;
954 dstgid = s.st_gid;
955 } else {
956 // Destination package doesn't
957 // exist... due to original-package,
958 // this is normal, so don't be
959 // noisy about it.
960 srcpkg[0] = 0;
961 }
962 } else {
963 srcpkg[0] = 0;
964 ALOGW("Can't create path %s in %s%s\n",
965 div, UPDATE_COMMANDS_DIR_PREFIX, name);
966 }
967 }
968 ALOGV("Transfering from %s to %s: uid=%d\n",
969 srcpkg, dstpkg, dstuid);
970 }
971 }
972 }
973 bufp = bufi+1;
974 } else {
975 if (bufp == 0) {
976 if (bufp < bufe) {
977 ALOGW("Line too long in %s%s, skipping: %s\n",
978 UPDATE_COMMANDS_DIR_PREFIX, name, buf);
979 }
980 } else if (bufp < bufe) {
981 memcpy(buf, buf+bufp, bufe-bufp);
982 bufe -= bufp;
983 bufp = 0;
984 }
985 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe);
986 if (readlen < 0) {
987 ALOGW("Failure reading update commands in %s%s: %s\n",
988 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno));
989 break;
990 } else if (readlen == 0) {
991 break;
992 }
993 bufe += readlen;
994 buf[bufe] = 0;
995 ALOGV("Read buf: %s\n", buf);
996 }
997 }
998 close(subfd);
999 }
1000 }
1001 closedir(d);
1002 done:
1003 return 0;
1004 }
1005
linklib(const char * pkgname,const char * asecLibDir,int userId)1006 int linklib(const char* pkgname, const char* asecLibDir, int userId)
1007 {
1008 char pkgdir[PKG_PATH_MAX];
1009 char libsymlink[PKG_PATH_MAX];
1010 struct stat s, libStat;
1011 int rc = 0;
1012
1013 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) {
1014 ALOGE("cannot create package path\n");
1015 return -1;
1016 }
1017 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) {
1018 ALOGE("cannot create package lib symlink origin path\n");
1019 return -1;
1020 }
1021
1022 if (stat(pkgdir, &s) < 0) return -1;
1023
1024 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) {
1025 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno));
1026 return -1;
1027 }
1028
1029 if (chmod(pkgdir, 0700) < 0) {
1030 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1031 rc = -1;
1032 goto out;
1033 }
1034
1035 if (lstat(libsymlink, &libStat) < 0) {
1036 if (errno != ENOENT) {
1037 ALOGE("couldn't stat lib dir: %s\n", strerror(errno));
1038 rc = -1;
1039 goto out;
1040 }
1041 } else {
1042 if (S_ISDIR(libStat.st_mode)) {
1043 if (delete_dir_contents(libsymlink, 1, 0) < 0) {
1044 rc = -1;
1045 goto out;
1046 }
1047 } else if (S_ISLNK(libStat.st_mode)) {
1048 if (unlink(libsymlink) < 0) {
1049 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno));
1050 rc = -1;
1051 goto out;
1052 }
1053 }
1054 }
1055
1056 if (symlink(asecLibDir, libsymlink) < 0) {
1057 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir,
1058 strerror(errno));
1059 rc = -errno;
1060 goto out;
1061 }
1062
1063 out:
1064 if (chmod(pkgdir, s.st_mode) < 0) {
1065 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno));
1066 rc = -errno;
1067 }
1068
1069 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) {
1070 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno));
1071 return -errno;
1072 }
1073
1074 return rc;
1075 }
1076