commands.cpp revision a5359950298f0bd5833ab72b7a26aef9fc45056f
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 32using android::base::StringPrintf; 33 34/* Directory records that are used in execution of commands. */ 35dir_rec_t android_data_dir; 36dir_rec_t android_asec_dir; 37dir_rec_t android_app_dir; 38dir_rec_t android_app_private_dir; 39dir_rec_t android_app_lib_dir; 40dir_rec_t android_media_dir; 41dir_rec_t android_mnt_expand_dir; 42dir_rec_array_t android_system_dirs; 43 44static const char* kCpPath = "/system/bin/cp"; 45 46int 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 81int 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 92int 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 109int 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 142int 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 150int 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 180int 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 272fail: 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 289int 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 298int 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 324int 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 334int 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 */ 358int 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 444int 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 470int 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 492int 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 626int 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 666static 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 683static 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 698static 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 738static 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 747static 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 976static 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 */ 1014static bool kAlwaysProvideSwapFile = false; 1015static bool kDefaultProvideSwapFile = true; 1016 1017static 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 */ 1054static 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 1084static 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 1097int dexopt(const char *apk_path, uid_t uid, const char *pkgname, const char *instruction_set, 1098 int dexopt_needed, const char* oat_dir, int dexopt_flags) 1099{ 1100 struct utimbuf ut; 1101 struct stat input_stat; 1102 char out_path[PKG_PATH_MAX]; 1103 char swap_file_name[PKG_PATH_MAX]; 1104 const char *input_file; 1105 char in_odex_path[PKG_PATH_MAX]; 1106 int res, input_fd=-1, out_fd=-1, swap_fd=-1; 1107 bool is_public = (dexopt_flags & DEXOPT_PUBLIC) != 0; 1108 bool vm_safe_mode = (dexopt_flags & DEXOPT_SAFEMODE) != 0; 1109 bool debuggable = (dexopt_flags & DEXOPT_DEBUGGABLE) != 0; 1110 bool boot_complete = (dexopt_flags & DEXOPT_BOOTCOMPLETE) != 0; 1111 1112 if ((dexopt_flags & DEXOPT_MASK) != 0) { 1113 LOG_FATAL("dexopt flags contains unknown fields\n"); 1114 } 1115 1116 // Early best-effort check whether we can fit the the path into our buffers. 1117 // Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run 1118 // without a swap file, if necessary. 1119 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) { 1120 ALOGE("apk_path too long '%s'\n", apk_path); 1121 return -1; 1122 } 1123 1124 if (oat_dir != NULL && oat_dir[0] != '!') { 1125 if (validate_apk_path(oat_dir)) { 1126 ALOGE("invalid oat_dir '%s'\n", oat_dir); 1127 return -1; 1128 } 1129 if (calculate_oat_file_path(out_path, oat_dir, apk_path, instruction_set)) { 1130 return -1; 1131 } 1132 } else { 1133 if (create_cache_path(out_path, apk_path, instruction_set)) { 1134 return -1; 1135 } 1136 } 1137 1138 switch (dexopt_needed) { 1139 case DEXOPT_DEX2OAT_NEEDED: 1140 input_file = apk_path; 1141 break; 1142 1143 case DEXOPT_PATCHOAT_NEEDED: 1144 if (!calculate_odex_file_path(in_odex_path, apk_path, instruction_set)) { 1145 return -1; 1146 } 1147 input_file = in_odex_path; 1148 break; 1149 1150 case DEXOPT_SELF_PATCHOAT_NEEDED: 1151 input_file = out_path; 1152 break; 1153 1154 default: 1155 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed); 1156 exit(72); 1157 } 1158 1159 memset(&input_stat, 0, sizeof(input_stat)); 1160 stat(input_file, &input_stat); 1161 1162 input_fd = open(input_file, O_RDONLY, 0); 1163 if (input_fd < 0) { 1164 ALOGE("installd cannot open '%s' for input during dexopt\n", input_file); 1165 return -1; 1166 } 1167 1168 unlink(out_path); 1169 out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1170 if (out_fd < 0) { 1171 ALOGE("installd cannot open '%s' for output during dexopt\n", out_path); 1172 goto fail; 1173 } 1174 if (fchmod(out_fd, 1175 S_IRUSR|S_IWUSR|S_IRGRP | 1176 (is_public ? S_IROTH : 0)) < 0) { 1177 ALOGE("installd cannot chmod '%s' during dexopt\n", out_path); 1178 goto fail; 1179 } 1180 if (fchown(out_fd, AID_SYSTEM, uid) < 0) { 1181 ALOGE("installd cannot chown '%s' during dexopt\n", out_path); 1182 goto fail; 1183 } 1184 1185 // Create profile file if there is a package name present. 1186 if (strcmp(pkgname, "*") != 0) { 1187 create_profile_file(pkgname, uid); 1188 } 1189 1190 // Create a swap file if necessary. 1191 if (ShouldUseSwapFileForDexopt()) { 1192 // Make sure there really is enough space. 1193 size_t out_len = strlen(out_path); 1194 if (out_len + strlen(".swap") + 1 <= PKG_PATH_MAX) { 1195 strcpy(swap_file_name, out_path); 1196 strcpy(swap_file_name + strlen(out_path), ".swap"); 1197 unlink(swap_file_name); 1198 swap_fd = open(swap_file_name, O_RDWR | O_CREAT | O_EXCL, 0600); 1199 if (swap_fd < 0) { 1200 // Could not create swap file. Optimistically go on and hope that we can compile 1201 // without it. 1202 ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name); 1203 } else { 1204 // Immediately unlink. We don't really want to hit flash. 1205 unlink(swap_file_name); 1206 } 1207 } else { 1208 // Swap file path is too long. Try to run without. 1209 ALOGE("installd could not create swap file for path %s during dexopt\n", out_path); 1210 } 1211 } 1212 1213 ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file); 1214 1215 pid_t pid; 1216 pid = fork(); 1217 if (pid == 0) { 1218 /* child -- drop privileges before continuing */ 1219 if (setgid(uid) != 0) { 1220 ALOGE("setgid(%d) failed in installd during dexopt\n", uid); 1221 exit(64); 1222 } 1223 if (setuid(uid) != 0) { 1224 ALOGE("setuid(%d) failed in installd during dexopt\n", uid); 1225 exit(65); 1226 } 1227 // drop capabilities 1228 struct __user_cap_header_struct capheader; 1229 struct __user_cap_data_struct capdata[2]; 1230 memset(&capheader, 0, sizeof(capheader)); 1231 memset(&capdata, 0, sizeof(capdata)); 1232 capheader.version = _LINUX_CAPABILITY_VERSION_3; 1233 if (capset(&capheader, &capdata[0]) < 0) { 1234 ALOGE("capset failed: %s\n", strerror(errno)); 1235 exit(66); 1236 } 1237 SetDex2OatAndPatchOatScheduling(boot_complete); 1238 if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) { 1239 ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno)); 1240 exit(67); 1241 } 1242 1243 if (dexopt_needed == DEXOPT_PATCHOAT_NEEDED 1244 || dexopt_needed == DEXOPT_SELF_PATCHOAT_NEEDED) { 1245 run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set); 1246 } else if (dexopt_needed == DEXOPT_DEX2OAT_NEEDED) { 1247 const char *input_file_name = strrchr(input_file, '/'); 1248 if (input_file_name == NULL) { 1249 input_file_name = input_file; 1250 } else { 1251 input_file_name++; 1252 } 1253 run_dex2oat(input_fd, out_fd, input_file_name, out_path, swap_fd, pkgname, 1254 instruction_set, vm_safe_mode, debuggable, boot_complete); 1255 } else { 1256 ALOGE("Invalid dexopt needed: %d\n", dexopt_needed); 1257 exit(73); 1258 } 1259 exit(68); /* only get here on exec failure */ 1260 } else { 1261 res = wait_child(pid); 1262 if (res == 0) { 1263 ALOGV("DexInv: --- END '%s' (success) ---\n", input_file); 1264 } else { 1265 ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res); 1266 goto fail; 1267 } 1268 } 1269 1270 ut.actime = input_stat.st_atime; 1271 ut.modtime = input_stat.st_mtime; 1272 utime(out_path, &ut); 1273 1274 close(out_fd); 1275 close(input_fd); 1276 if (swap_fd != -1) { 1277 close(swap_fd); 1278 } 1279 return 0; 1280 1281fail: 1282 if (out_fd >= 0) { 1283 close(out_fd); 1284 unlink(out_path); 1285 } 1286 if (input_fd >= 0) { 1287 close(input_fd); 1288 } 1289 return -1; 1290} 1291 1292int mark_boot_complete(const char* instruction_set) 1293{ 1294 char boot_marker_path[PKG_PATH_MAX]; 1295 sprintf(boot_marker_path,"%s%s/.booting", DALVIK_CACHE_PREFIX, instruction_set); 1296 1297 ALOGV("mark_boot_complete : %s", boot_marker_path); 1298 if (unlink(boot_marker_path) != 0) { 1299 ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path, 1300 strerror(errno)); 1301 return -1; 1302 } 1303 1304 return 0; 1305} 1306 1307void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1308 struct stat* statbuf) 1309{ 1310 while (path[basepos] != 0) { 1311 if (path[basepos] == '/') { 1312 path[basepos] = 0; 1313 if (lstat(path, statbuf) < 0) { 1314 ALOGV("Making directory: %s\n", path); 1315 if (mkdir(path, mode) == 0) { 1316 chown(path, uid, gid); 1317 } else { 1318 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1319 } 1320 } 1321 path[basepos] = '/'; 1322 basepos++; 1323 } 1324 basepos++; 1325 } 1326} 1327 1328int movefileordir(char* srcpath, char* dstpath, int dstbasepos, 1329 int dstuid, int dstgid, struct stat* statbuf) 1330{ 1331 DIR *d; 1332 struct dirent *de; 1333 int res; 1334 1335 int srcend = strlen(srcpath); 1336 int dstend = strlen(dstpath); 1337 1338 if (lstat(srcpath, statbuf) < 0) { 1339 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno)); 1340 return 1; 1341 } 1342 1343 if ((statbuf->st_mode&S_IFDIR) == 0) { 1344 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH, 1345 dstuid, dstgid, statbuf); 1346 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid); 1347 if (rename(srcpath, dstpath) >= 0) { 1348 if (chown(dstpath, dstuid, dstgid) < 0) { 1349 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno)); 1350 unlink(dstpath); 1351 return 1; 1352 } 1353 } else { 1354 ALOGW("Unable to rename %s to %s: %s\n", 1355 srcpath, dstpath, strerror(errno)); 1356 return 1; 1357 } 1358 return 0; 1359 } 1360 1361 d = opendir(srcpath); 1362 if (d == NULL) { 1363 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno)); 1364 return 1; 1365 } 1366 1367 res = 0; 1368 1369 while ((de = readdir(d))) { 1370 const char *name = de->d_name; 1371 /* always skip "." and ".." */ 1372 if (name[0] == '.') { 1373 if (name[1] == 0) continue; 1374 if ((name[1] == '.') && (name[2] == 0)) continue; 1375 } 1376 1377 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) { 1378 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name); 1379 continue; 1380 } 1381 1382 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) { 1383 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name); 1384 continue; 1385 } 1386 1387 srcpath[srcend] = dstpath[dstend] = '/'; 1388 strcpy(srcpath+srcend+1, name); 1389 strcpy(dstpath+dstend+1, name); 1390 1391 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) { 1392 res = 1; 1393 } 1394 1395 // Note: we will be leaving empty directories behind in srcpath, 1396 // but that is okay, the package manager will be erasing all of the 1397 // data associated with .apks that disappear. 1398 1399 srcpath[srcend] = dstpath[dstend] = 0; 1400 } 1401 1402 closedir(d); 1403 return res; 1404} 1405 1406int movefiles() 1407{ 1408 DIR *d; 1409 int dfd, subfd; 1410 struct dirent *de; 1411 struct stat s; 1412 char buf[PKG_PATH_MAX+1]; 1413 int bufp, bufe, bufi, readlen; 1414 1415 char srcpkg[PKG_NAME_MAX]; 1416 char dstpkg[PKG_NAME_MAX]; 1417 char srcpath[PKG_PATH_MAX]; 1418 char dstpath[PKG_PATH_MAX]; 1419 int dstuid=-1, dstgid=-1; 1420 int hasspace; 1421 1422 d = opendir(UPDATE_COMMANDS_DIR_PREFIX); 1423 if (d == NULL) { 1424 goto done; 1425 } 1426 dfd = dirfd(d); 1427 1428 /* Iterate through all files in the directory, executing the 1429 * file movements requested there-in. 1430 */ 1431 while ((de = readdir(d))) { 1432 const char *name = de->d_name; 1433 1434 if (de->d_type == DT_DIR) { 1435 continue; 1436 } else { 1437 subfd = openat(dfd, name, O_RDONLY); 1438 if (subfd < 0) { 1439 ALOGW("Unable to open update commands at %s%s\n", 1440 UPDATE_COMMANDS_DIR_PREFIX, name); 1441 continue; 1442 } 1443 1444 bufp = 0; 1445 bufe = 0; 1446 buf[PKG_PATH_MAX] = 0; 1447 srcpkg[0] = dstpkg[0] = 0; 1448 while (1) { 1449 bufi = bufp; 1450 while (bufi < bufe && buf[bufi] != '\n') { 1451 bufi++; 1452 } 1453 if (bufi < bufe) { 1454 buf[bufi] = 0; 1455 ALOGV("Processing line: %s\n", buf+bufp); 1456 hasspace = 0; 1457 while (bufp < bufi && isspace(buf[bufp])) { 1458 hasspace = 1; 1459 bufp++; 1460 } 1461 if (buf[bufp] == '#' || bufp == bufi) { 1462 // skip comments and empty lines. 1463 } else if (hasspace) { 1464 if (dstpkg[0] == 0) { 1465 ALOGW("Path before package line in %s%s: %s\n", 1466 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 1467 } else if (srcpkg[0] == 0) { 1468 // Skip -- source package no longer exists. 1469 } else { 1470 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg); 1471 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) && 1472 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) { 1473 movefileordir(srcpath, dstpath, 1474 strlen(dstpath)-strlen(buf+bufp), 1475 dstuid, dstgid, &s); 1476 } 1477 } 1478 } else { 1479 char* div = strchr(buf+bufp, ':'); 1480 if (div == NULL) { 1481 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n", 1482 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 1483 } else { 1484 *div = 0; 1485 div++; 1486 if (strlen(buf+bufp) < PKG_NAME_MAX) { 1487 strcpy(dstpkg, buf+bufp); 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, buf+bufp); 1492 } 1493 if (strlen(div) < PKG_NAME_MAX) { 1494 strcpy(srcpkg, div); 1495 } else { 1496 srcpkg[0] = dstpkg[0] = 0; 1497 ALOGW("Package name too long in %s%s: %s\n", 1498 UPDATE_COMMANDS_DIR_PREFIX, name, div); 1499 } 1500 if (srcpkg[0] != 0) { 1501 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) { 1502 if (lstat(srcpath, &s) < 0) { 1503 // Package no longer exists -- skip. 1504 srcpkg[0] = 0; 1505 } 1506 } else { 1507 srcpkg[0] = 0; 1508 ALOGW("Can't create path %s in %s%s\n", 1509 div, UPDATE_COMMANDS_DIR_PREFIX, name); 1510 } 1511 if (srcpkg[0] != 0) { 1512 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) { 1513 if (lstat(dstpath, &s) == 0) { 1514 dstuid = s.st_uid; 1515 dstgid = s.st_gid; 1516 } else { 1517 // Destination package doesn't 1518 // exist... due to original-package, 1519 // this is normal, so don't be 1520 // noisy about it. 1521 srcpkg[0] = 0; 1522 } 1523 } else { 1524 srcpkg[0] = 0; 1525 ALOGW("Can't create path %s in %s%s\n", 1526 div, UPDATE_COMMANDS_DIR_PREFIX, name); 1527 } 1528 } 1529 ALOGV("Transfering from %s to %s: uid=%d\n", 1530 srcpkg, dstpkg, dstuid); 1531 } 1532 } 1533 } 1534 bufp = bufi+1; 1535 } else { 1536 if (bufp == 0) { 1537 if (bufp < bufe) { 1538 ALOGW("Line too long in %s%s, skipping: %s\n", 1539 UPDATE_COMMANDS_DIR_PREFIX, name, buf); 1540 } 1541 } else if (bufp < bufe) { 1542 memcpy(buf, buf+bufp, bufe-bufp); 1543 bufe -= bufp; 1544 bufp = 0; 1545 } 1546 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe); 1547 if (readlen < 0) { 1548 ALOGW("Failure reading update commands in %s%s: %s\n", 1549 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno)); 1550 break; 1551 } else if (readlen == 0) { 1552 break; 1553 } 1554 bufe += readlen; 1555 buf[bufe] = 0; 1556 ALOGV("Read buf: %s\n", buf); 1557 } 1558 } 1559 close(subfd); 1560 } 1561 } 1562 closedir(d); 1563done: 1564 return 0; 1565} 1566 1567int linklib(const char* uuid, const char* pkgname, const char* asecLibDir, int userId) 1568{ 1569 struct stat s, libStat; 1570 int rc = 0; 1571 1572 std::string _pkgdir(create_data_user_package_path(uuid, userId, pkgname)); 1573 std::string _libsymlink(_pkgdir + PKG_LIB_POSTFIX); 1574 1575 const char* pkgdir = _pkgdir.c_str(); 1576 const char* libsymlink = _libsymlink.c_str(); 1577 1578 if (stat(pkgdir, &s) < 0) return -1; 1579 1580 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1581 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno)); 1582 return -1; 1583 } 1584 1585 if (chmod(pkgdir, 0700) < 0) { 1586 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1587 rc = -1; 1588 goto out; 1589 } 1590 1591 if (lstat(libsymlink, &libStat) < 0) { 1592 if (errno != ENOENT) { 1593 ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); 1594 rc = -1; 1595 goto out; 1596 } 1597 } else { 1598 if (S_ISDIR(libStat.st_mode)) { 1599 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1600 rc = -1; 1601 goto out; 1602 } 1603 } else if (S_ISLNK(libStat.st_mode)) { 1604 if (unlink(libsymlink) < 0) { 1605 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno)); 1606 rc = -1; 1607 goto out; 1608 } 1609 } 1610 } 1611 1612 if (symlink(asecLibDir, libsymlink) < 0) { 1613 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir, 1614 strerror(errno)); 1615 rc = -errno; 1616 goto out; 1617 } 1618 1619out: 1620 if (chmod(pkgdir, s.st_mode) < 0) { 1621 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1622 rc = -errno; 1623 } 1624 1625 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1626 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno)); 1627 return -errno; 1628 } 1629 1630 return rc; 1631} 1632 1633static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1634{ 1635 static const char *IDMAP_BIN = "/system/bin/idmap"; 1636 static const size_t MAX_INT_LEN = 32; 1637 char idmap_str[MAX_INT_LEN]; 1638 1639 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1640 1641 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1642 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1643} 1644 1645// Transform string /a/b/c.apk to (prefix)/a@b@c.apk@(suffix) 1646// eg /a/b/c.apk to /data/resource-cache/a@b@c.apk@idmap 1647static int flatten_path(const char *prefix, const char *suffix, 1648 const char *overlay_path, char *idmap_path, size_t N) 1649{ 1650 if (overlay_path == NULL || idmap_path == NULL) { 1651 return -1; 1652 } 1653 const size_t len_overlay_path = strlen(overlay_path); 1654 // will access overlay_path + 1 further below; requires absolute path 1655 if (len_overlay_path < 2 || *overlay_path != '/') { 1656 return -1; 1657 } 1658 const size_t len_idmap_root = strlen(prefix); 1659 const size_t len_suffix = strlen(suffix); 1660 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1661 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1662 // additions below would cause overflow 1663 return -1; 1664 } 1665 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1666 return -1; 1667 } 1668 memset(idmap_path, 0, N); 1669 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1670 char *ch = idmap_path + len_idmap_root; 1671 while (*ch != '\0') { 1672 if (*ch == '/') { 1673 *ch = '@'; 1674 } 1675 ++ch; 1676 } 1677 return 0; 1678} 1679 1680int idmap(const char *target_apk, const char *overlay_apk, uid_t uid) 1681{ 1682 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1683 1684 int idmap_fd = -1; 1685 char idmap_path[PATH_MAX]; 1686 1687 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1688 idmap_path, sizeof(idmap_path)) == -1) { 1689 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1690 goto fail; 1691 } 1692 1693 unlink(idmap_path); 1694 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1695 if (idmap_fd < 0) { 1696 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1697 goto fail; 1698 } 1699 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1700 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1701 goto fail; 1702 } 1703 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1704 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1705 goto fail; 1706 } 1707 1708 pid_t pid; 1709 pid = fork(); 1710 if (pid == 0) { 1711 /* child -- drop privileges before continuing */ 1712 if (setgid(uid) != 0) { 1713 ALOGE("setgid(%d) failed during idmap\n", uid); 1714 exit(1); 1715 } 1716 if (setuid(uid) != 0) { 1717 ALOGE("setuid(%d) failed during idmap\n", uid); 1718 exit(1); 1719 } 1720 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1721 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1722 exit(1); 1723 } 1724 1725 run_idmap(target_apk, overlay_apk, idmap_fd); 1726 exit(1); /* only if exec call to idmap failed */ 1727 } else { 1728 int status = wait_child(pid); 1729 if (status != 0) { 1730 ALOGE("idmap failed, status=0x%04x\n", status); 1731 goto fail; 1732 } 1733 } 1734 1735 close(idmap_fd); 1736 return 0; 1737fail: 1738 if (idmap_fd >= 0) { 1739 close(idmap_fd); 1740 unlink(idmap_path); 1741 } 1742 return -1; 1743} 1744 1745int restorecon_data(const char* uuid, const char* pkgName, 1746 const char* seinfo, uid_t uid) 1747{ 1748 struct dirent *entry; 1749 DIR *d; 1750 struct stat s; 1751 int ret = 0; 1752 1753 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1754 unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE; 1755 1756 if (!pkgName || !seinfo) { 1757 ALOGE("Package name or seinfo tag is null when trying to restorecon."); 1758 return -1; 1759 } 1760 1761 // Special case for owner on internal storage 1762 if (uuid == nullptr) { 1763 std::string path(create_data_user_package_path(nullptr, 0, pkgName)); 1764 1765 if (selinux_android_restorecon_pkgdir(path.c_str(), seinfo, uid, flags) < 0) { 1766 PLOG(ERROR) << "restorecon failed for " << path; 1767 ret |= -1; 1768 } 1769 } 1770 1771 // Relabel package directory for all secondary users. 1772 std::string userdir(create_data_path(uuid) + "/" + SECONDARY_USER_PREFIX); 1773 d = opendir(userdir.c_str()); 1774 if (d == NULL) { 1775 return -1; 1776 } 1777 1778 while ((entry = readdir(d))) { 1779 if (entry->d_type != DT_DIR) { 1780 continue; 1781 } 1782 1783 const char *user = entry->d_name; 1784 // Ignore "." and ".." 1785 if (!strcmp(user, ".") || !strcmp(user, "..")) { 1786 continue; 1787 } 1788 1789 // user directories start with a number 1790 if (user[0] < '0' || user[0] > '9') { 1791 ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user); 1792 continue; 1793 } 1794 1795 std::string pkgdir(StringPrintf("%s%s/%s", userdir.c_str(), user, pkgName)); 1796 if (stat(pkgdir.c_str(), &s) < 0) { 1797 continue; 1798 } 1799 1800 if (selinux_android_restorecon_pkgdir(pkgdir.c_str(), seinfo, s.st_uid, flags) < 0) { 1801 PLOG(ERROR) << "restorecon failed for " << pkgdir; 1802 ret |= -1; 1803 } 1804 } 1805 1806 closedir(d); 1807 return ret; 1808} 1809 1810int create_oat_dir(const char* oat_dir, const char* instruction_set) 1811{ 1812 char oat_instr_dir[PKG_PATH_MAX]; 1813 1814 if (validate_apk_path(oat_dir)) { 1815 ALOGE("invalid apk path '%s' (bad prefix)\n", oat_dir); 1816 return -1; 1817 } 1818 if (fs_prepare_dir(oat_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1819 return -1; 1820 } 1821 if (selinux_android_restorecon(oat_dir, 0)) { 1822 ALOGE("cannot restorecon dir '%s': %s\n", oat_dir, strerror(errno)); 1823 return -1; 1824 } 1825 snprintf(oat_instr_dir, PKG_PATH_MAX, "%s/%s", oat_dir, instruction_set); 1826 if (fs_prepare_dir(oat_instr_dir, S_IRWXU | S_IRWXG | S_IXOTH, AID_SYSTEM, AID_INSTALL)) { 1827 return -1; 1828 } 1829 return 0; 1830} 1831 1832int rm_package_dir(const char* apk_path) 1833{ 1834 if (validate_apk_path(apk_path)) { 1835 ALOGE("invalid apk path '%s' (bad prefix)\n", apk_path); 1836 return -1; 1837 } 1838 return delete_dir_contents(apk_path, 1 /* also_delete_dir */ , NULL /* exclusion_predicate */); 1839} 1840 1841int link_file(const char* relative_path, const char* from_base, const char* to_base) { 1842 char from_path[PKG_PATH_MAX]; 1843 char to_path[PKG_PATH_MAX]; 1844 snprintf(from_path, PKG_PATH_MAX, "%s/%s", from_base, relative_path); 1845 snprintf(to_path, PKG_PATH_MAX, "%s/%s", to_base, relative_path); 1846 1847 if (validate_apk_path_subdirs(from_path)) { 1848 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", from_path); 1849 return -1; 1850 } 1851 1852 if (validate_apk_path_subdirs(to_path)) { 1853 ALOGE("invalid app data sub-path '%s' (bad prefix)\n", to_path); 1854 return -1; 1855 } 1856 1857 const int ret = link(from_path, to_path); 1858 if (ret < 0) { 1859 ALOGE("link(%s, %s) failed : %s", from_path, to_path, strerror(errno)); 1860 return -1; 1861 } 1862 1863 return 0; 1864} 1865 1866int calculate_oat_file_path(char path[PKG_PATH_MAX], const char *oat_dir, const char *apk_path, 1867 const char *instruction_set) { 1868 char *file_name_start; 1869 char *file_name_end; 1870 1871 file_name_start = strrchr(apk_path, '/'); 1872 if (file_name_start == NULL) { 1873 ALOGE("apk_path '%s' has no '/'s in it\n", apk_path); 1874 return -1; 1875 } 1876 file_name_end = strrchr(apk_path, '.'); 1877 if (file_name_end < file_name_start) { 1878 ALOGE("apk_path '%s' has no extension\n", apk_path); 1879 return -1; 1880 } 1881 1882 // Calculate file_name 1883 int file_name_len = file_name_end - file_name_start - 1; 1884 char file_name[file_name_len + 1]; 1885 memcpy(file_name, file_name_start + 1, file_name_len); 1886 file_name[file_name_len] = '\0'; 1887 1888 // <apk_parent_dir>/oat/<isa>/<file_name>.odex 1889 snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name); 1890 return 0; 1891} 1892