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 <inttypes.h> 18 #include <sys/capability.h> 19 #include "installd.h" 20 #include <cutils/sched_policy.h> 21 #include <diskusage/dirsize.h> 22 #include <selinux/android.h> 23 #include <system/thread_defs.h> 24 25 /* Directory records that are used in execution of commands. */ 26 dir_rec_t android_data_dir; 27 dir_rec_t android_asec_dir; 28 dir_rec_t android_app_dir; 29 dir_rec_t android_app_private_dir; 30 dir_rec_t android_app_lib_dir; 31 dir_rec_t android_media_dir; 32 dir_rec_array_t android_system_dirs; 33 34 int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo) 35 { 36 char pkgdir[PKG_PATH_MAX]; 37 char libsymlink[PKG_PATH_MAX]; 38 char applibdir[PKG_PATH_MAX]; 39 struct stat libStat; 40 41 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { 42 ALOGE("invalid uid/gid: %d %d\n", uid, gid); 43 return -1; 44 } 45 46 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { 47 ALOGE("cannot create package path\n"); 48 return -1; 49 } 50 51 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) { 52 ALOGE("cannot create package lib symlink origin path\n"); 53 return -1; 54 } 55 56 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { 57 ALOGE("cannot create package lib symlink dest path\n"); 58 return -1; 59 } 60 61 if (mkdir(pkgdir, 0751) < 0) { 62 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); 63 return -1; 64 } 65 if (chmod(pkgdir, 0751) < 0) { 66 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 67 unlink(pkgdir); 68 return -1; 69 } 70 71 if (lstat(libsymlink, &libStat) < 0) { 72 if (errno != ENOENT) { 73 ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); 74 return -1; 75 } 76 } else { 77 if (S_ISDIR(libStat.st_mode)) { 78 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 79 ALOGE("couldn't delete lib directory during install for: %s", libsymlink); 80 return -1; 81 } 82 } else if (S_ISLNK(libStat.st_mode)) { 83 if (unlink(libsymlink) < 0) { 84 ALOGE("couldn't unlink lib directory during install for: %s", libsymlink); 85 return -1; 86 } 87 } 88 } 89 90 if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { 91 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); 92 unlink(libsymlink); 93 unlink(pkgdir); 94 return -errno; 95 } 96 97 if (symlink(applibdir, libsymlink) < 0) { 98 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir, 99 strerror(errno)); 100 unlink(pkgdir); 101 return -1; 102 } 103 104 if (chown(pkgdir, uid, gid) < 0) { 105 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 106 unlink(libsymlink); 107 unlink(pkgdir); 108 return -1; 109 } 110 111 return 0; 112 } 113 114 int uninstall(const char *pkgname, userid_t userid) 115 { 116 char pkgdir[PKG_PATH_MAX]; 117 118 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) 119 return -1; 120 121 remove_profile_file(pkgname); 122 123 /* delete contents AND directory, no exceptions */ 124 return delete_dir_contents(pkgdir, 1, NULL); 125 } 126 127 int renamepkg(const char *oldpkgname, const char *newpkgname) 128 { 129 char oldpkgdir[PKG_PATH_MAX]; 130 char newpkgdir[PKG_PATH_MAX]; 131 132 if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0)) 133 return -1; 134 if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0)) 135 return -1; 136 137 if (rename(oldpkgdir, newpkgdir) < 0) { 138 ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno)); 139 return -errno; 140 } 141 return 0; 142 } 143 144 int fix_uid(const char *pkgname, uid_t uid, gid_t gid) 145 { 146 char pkgdir[PKG_PATH_MAX]; 147 struct stat s; 148 int rc = 0; 149 150 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { 151 ALOGE("invalid uid/gid: %d %d\n", uid, gid); 152 return -1; 153 } 154 155 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { 156 ALOGE("cannot create package path\n"); 157 return -1; 158 } 159 160 if (stat(pkgdir, &s) < 0) return -1; 161 162 if (s.st_uid != 0 || s.st_gid != 0) { 163 ALOGE("fixing uid of non-root pkg: %s %" PRIu32 " %" PRIu32 "\n", pkgdir, s.st_uid, s.st_gid); 164 return -1; 165 } 166 167 if (chmod(pkgdir, 0751) < 0) { 168 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 169 unlink(pkgdir); 170 return -errno; 171 } 172 if (chown(pkgdir, uid, gid) < 0) { 173 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 174 unlink(pkgdir); 175 return -errno; 176 } 177 178 return 0; 179 } 180 181 int delete_user_data(const char *pkgname, userid_t userid) 182 { 183 char pkgdir[PKG_PATH_MAX]; 184 185 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) 186 return -1; 187 188 return delete_dir_contents(pkgdir, 0, NULL); 189 } 190 191 int make_user_data(const char *pkgname, uid_t uid, userid_t userid, const char* seinfo) 192 { 193 char pkgdir[PKG_PATH_MAX]; 194 char applibdir[PKG_PATH_MAX]; 195 char libsymlink[PKG_PATH_MAX]; 196 struct stat libStat; 197 198 // Create the data dir for the package 199 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userid)) { 200 return -1; 201 } 202 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userid)) { 203 ALOGE("cannot create package lib symlink origin path\n"); 204 return -1; 205 } 206 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { 207 ALOGE("cannot create package lib symlink dest path\n"); 208 return -1; 209 } 210 211 if (mkdir(pkgdir, 0751) < 0) { 212 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); 213 return -errno; 214 } 215 if (chmod(pkgdir, 0751) < 0) { 216 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 217 unlink(pkgdir); 218 return -errno; 219 } 220 221 if (lstat(libsymlink, &libStat) < 0) { 222 if (errno != ENOENT) { 223 ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno)); 224 unlink(pkgdir); 225 return -1; 226 } 227 } else { 228 if (S_ISDIR(libStat.st_mode)) { 229 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 230 ALOGE("couldn't delete lib directory during install for non-primary: %s", 231 libsymlink); 232 unlink(pkgdir); 233 return -1; 234 } 235 } else if (S_ISLNK(libStat.st_mode)) { 236 if (unlink(libsymlink) < 0) { 237 ALOGE("couldn't unlink lib directory during install for non-primary: %s", 238 libsymlink); 239 unlink(pkgdir); 240 return -1; 241 } 242 } 243 } 244 245 if (selinux_android_setfilecon(pkgdir, pkgname, seinfo, uid) < 0) { 246 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); 247 unlink(libsymlink); 248 unlink(pkgdir); 249 return -errno; 250 } 251 252 if (symlink(applibdir, libsymlink) < 0) { 253 ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink, 254 applibdir, strerror(errno)); 255 unlink(pkgdir); 256 return -1; 257 } 258 259 if (chown(pkgdir, uid, uid) < 0) { 260 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 261 unlink(libsymlink); 262 unlink(pkgdir); 263 return -errno; 264 } 265 266 return 0; 267 } 268 269 int make_user_config(userid_t userid) 270 { 271 if (ensure_config_user_dirs(userid) == -1) { 272 return -1; 273 } 274 275 return 0; 276 } 277 278 int delete_user(userid_t userid) 279 { 280 int status = 0; 281 282 char data_path[PKG_PATH_MAX]; 283 if ((create_user_path(data_path, userid) != 0) 284 || (delete_dir_contents(data_path, 1, NULL) != 0)) { 285 status = -1; 286 } 287 288 char media_path[PATH_MAX]; 289 if ((create_user_media_path(media_path, userid) != 0) 290 || (delete_dir_contents(media_path, 1, NULL) != 0)) { 291 status = -1; 292 } 293 294 char config_path[PATH_MAX]; 295 if ((create_user_config_path(config_path, userid) != 0) 296 || (delete_dir_contents(config_path, 1, NULL) != 0)) { 297 status = -1; 298 } 299 300 return status; 301 } 302 303 int delete_cache(const char *pkgname, userid_t userid) 304 { 305 char cachedir[PKG_PATH_MAX]; 306 307 if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, userid)) 308 return -1; 309 310 /* delete contents, not the directory, no exceptions */ 311 return delete_dir_contents(cachedir, 0, NULL); 312 } 313 314 int delete_code_cache(const char *pkgname, userid_t userid) 315 { 316 char codecachedir[PKG_PATH_MAX]; 317 struct stat s; 318 319 if (create_pkg_path(codecachedir, pkgname, CODE_CACHE_DIR_POSTFIX, userid)) 320 return -1; 321 322 /* it's okay if code cache is missing */ 323 if (lstat(codecachedir, &s) == -1 && errno == ENOENT) { 324 return 0; 325 } 326 327 /* delete contents, not the directory, no exceptions */ 328 return delete_dir_contents(codecachedir, 0, NULL); 329 } 330 331 /* Try to ensure free_size bytes of storage are available. 332 * Returns 0 on success. 333 * This is rather simple-minded because doing a full LRU would 334 * be potentially memory-intensive, and without atime it would 335 * also require that apps constantly modify file metadata even 336 * when just reading from the cache, which is pretty awful. 337 */ 338 int free_cache(int64_t free_size) 339 { 340 cache_t* cache; 341 int64_t avail; 342 DIR *d; 343 struct dirent *de; 344 char tmpdir[PATH_MAX]; 345 char *dirpos; 346 347 avail = data_disk_free(); 348 if (avail < 0) return -1; 349 350 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail); 351 if (avail >= free_size) return 0; 352 353 cache = start_cache_collection(); 354 355 // Collect cache files for primary user. 356 if (create_user_path(tmpdir, 0) == 0) { 357 //ALOGI("adding cache files from %s\n", tmpdir); 358 add_cache_files(cache, tmpdir, "cache"); 359 } 360 361 // Search for other users and add any cache files from them. 362 snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path, 363 SECONDARY_USER_PREFIX); 364 dirpos = tmpdir + strlen(tmpdir); 365 d = opendir(tmpdir); 366 if (d != NULL) { 367 while ((de = readdir(d))) { 368 if (de->d_type == DT_DIR) { 369 const char *name = de->d_name; 370 /* always skip "." and ".." */ 371 if (name[0] == '.') { 372 if (name[1] == 0) continue; 373 if ((name[1] == '.') && (name[2] == 0)) continue; 374 } 375 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) { 376 strcpy(dirpos, name); 377 //ALOGI("adding cache files from %s\n", tmpdir); 378 add_cache_files(cache, tmpdir, "cache"); 379 } else { 380 ALOGW("Path exceeds limit: %s%s", tmpdir, name); 381 } 382 } 383 } 384 closedir(d); 385 } 386 387 // Collect cache files on external storage for all users (if it is mounted as part 388 // of the internal storage). 389 strcpy(tmpdir, android_media_dir.path); 390 dirpos = tmpdir + strlen(tmpdir); 391 d = opendir(tmpdir); 392 if (d != NULL) { 393 while ((de = readdir(d))) { 394 if (de->d_type == DT_DIR) { 395 const char *name = de->d_name; 396 /* skip any dir that doesn't start with a number, so not a user */ 397 if (name[0] < '0' || name[0] > '9') { 398 continue; 399 } 400 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) { 401 strcpy(dirpos, name); 402 if (lookup_media_dir(tmpdir, "Android") == 0 403 && lookup_media_dir(tmpdir, "data") == 0) { 404 //ALOGI("adding cache files from %s\n", tmpdir); 405 add_cache_files(cache, tmpdir, "cache"); 406 } 407 } else { 408 ALOGW("Path exceeds limit: %s%s", tmpdir, name); 409 } 410 } 411 } 412 closedir(d); 413 } 414 415 clear_cache_files(cache, free_size); 416 finish_cache_collection(cache); 417 418 return data_disk_free() >= free_size ? 0 : -1; 419 } 420 421 int move_dex(const char *src, const char *dst, const char *instruction_set) 422 { 423 char src_dex[PKG_PATH_MAX]; 424 char dst_dex[PKG_PATH_MAX]; 425 426 if (validate_apk_path(src)) { 427 ALOGE("invalid apk path '%s' (bad prefix)\n", src); 428 return -1; 429 } 430 if (validate_apk_path(dst)) { 431 ALOGE("invalid apk path '%s' (bad prefix)\n", dst); 432 return -1; 433 } 434 435 if (create_cache_path(src_dex, src, instruction_set)) return -1; 436 if (create_cache_path(dst_dex, dst, instruction_set)) return -1; 437 438 ALOGV("move %s -> %s\n", src_dex, dst_dex); 439 if (rename(src_dex, dst_dex) < 0) { 440 ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno)); 441 return -1; 442 } else { 443 return 0; 444 } 445 } 446 447 int rm_dex(const char *path, const char *instruction_set) 448 { 449 char dex_path[PKG_PATH_MAX]; 450 451 if (validate_apk_path(path) && validate_system_app_path(path)) { 452 ALOGE("invalid apk path '%s' (bad prefix)\n", path); 453 return -1; 454 } 455 456 if (create_cache_path(dex_path, path, instruction_set)) return -1; 457 458 ALOGV("unlink %s\n", dex_path); 459 if (unlink(dex_path) < 0) { 460 if (errno != ENOENT) { 461 ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno)); 462 } 463 return -1; 464 } else { 465 return 0; 466 } 467 } 468 469 int get_size(const char *pkgname, userid_t userid, const char *apkpath, 470 const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath, 471 const char *instruction_set, int64_t *_codesize, int64_t *_datasize, 472 int64_t *_cachesize, int64_t* _asecsize) 473 { 474 DIR *d; 475 int dfd; 476 struct dirent *de; 477 struct stat s; 478 char path[PKG_PATH_MAX]; 479 480 int64_t codesize = 0; 481 int64_t datasize = 0; 482 int64_t cachesize = 0; 483 int64_t asecsize = 0; 484 485 /* count the source apk as code -- but only if it's not 486 * on the /system partition and its not on the sdcard. 487 */ 488 if (validate_system_app_path(apkpath) && 489 strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) { 490 if (stat(apkpath, &s) == 0) { 491 codesize += stat_size(&s); 492 } 493 } 494 /* count the forward locked apk as code if it is given 495 */ 496 if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') { 497 if (stat(fwdlock_apkpath, &s) == 0) { 498 codesize += stat_size(&s); 499 } 500 } 501 /* count the cached dexfile as code */ 502 if (!create_cache_path(path, apkpath, instruction_set)) { 503 if (stat(path, &s) == 0) { 504 codesize += stat_size(&s); 505 } 506 } 507 508 /* add in size of any libraries */ 509 if (libdirpath != NULL && libdirpath[0] != '!') { 510 d = opendir(libdirpath); 511 if (d != NULL) { 512 dfd = dirfd(d); 513 codesize += calculate_dir_size(dfd); 514 closedir(d); 515 } 516 } 517 518 /* compute asec size if it is given 519 */ 520 if (asecpath != NULL && asecpath[0] != '!') { 521 if (stat(asecpath, &s) == 0) { 522 asecsize += stat_size(&s); 523 } 524 } 525 526 if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, userid)) { 527 goto done; 528 } 529 530 d = opendir(path); 531 if (d == NULL) { 532 goto done; 533 } 534 dfd = dirfd(d); 535 536 /* most stuff in the pkgdir is data, except for the "cache" 537 * directory and below, which is cache, and the "lib" directory 538 * and below, which is code... 539 */ 540 while ((de = readdir(d))) { 541 const char *name = de->d_name; 542 543 if (de->d_type == DT_DIR) { 544 int subfd; 545 int64_t statsize = 0; 546 int64_t dirsize = 0; 547 /* always skip "." and ".." */ 548 if (name[0] == '.') { 549 if (name[1] == 0) continue; 550 if ((name[1] == '.') && (name[2] == 0)) continue; 551 } 552 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 553 statsize = stat_size(&s); 554 } 555 subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); 556 if (subfd >= 0) { 557 dirsize = calculate_dir_size(subfd); 558 } 559 if(!strcmp(name,"lib")) { 560 codesize += dirsize + statsize; 561 } else if(!strcmp(name,"cache")) { 562 cachesize += dirsize + statsize; 563 } else { 564 datasize += dirsize + statsize; 565 } 566 } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) { 567 // This is the symbolic link to the application's library 568 // code. We'll count this as code instead of data, since 569 // it is not something that the app creates. 570 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 571 codesize += stat_size(&s); 572 } 573 } else { 574 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 575 datasize += stat_size(&s); 576 } 577 } 578 } 579 closedir(d); 580 done: 581 *_codesize = codesize; 582 *_datasize = datasize; 583 *_cachesize = cachesize; 584 *_asecsize = asecsize; 585 return 0; 586 } 587 588 int create_cache_path(char path[PKG_PATH_MAX], const char *src, const char *instruction_set) 589 { 590 char *tmp; 591 int srclen; 592 int dstlen; 593 594 srclen = strlen(src); 595 596 /* demand that we are an absolute path */ 597 if ((src == 0) || (src[0] != '/') || strstr(src,"..")) { 598 return -1; 599 } 600 601 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX? 602 return -1; 603 } 604 605 dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) + 606 strlen(instruction_set) + 607 strlen(DALVIK_CACHE_POSTFIX) + 2; 608 609 if (dstlen > PKG_PATH_MAX) { 610 return -1; 611 } 612 613 sprintf(path,"%s%s/%s%s", 614 DALVIK_CACHE_PREFIX, 615 instruction_set, 616 src + 1, /* skip the leading / */ 617 DALVIK_CACHE_POSTFIX); 618 619 for(tmp = path + strlen(DALVIK_CACHE_PREFIX) + strlen(instruction_set) + 1; *tmp; tmp++) { 620 if (*tmp == '/') { 621 *tmp = '@'; 622 } 623 } 624 625 return 0; 626 } 627 628 static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name, 629 const char* output_file_name) 630 { 631 /* platform-specific flags affecting optimization and verification */ 632 char dexopt_flags[PROPERTY_VALUE_MAX]; 633 property_get("dalvik.vm.dexopt-flags", dexopt_flags, ""); 634 ALOGV("dalvik.vm.dexopt-flags=%s\n", dexopt_flags); 635 636 static const char* DEX_OPT_BIN = "/system/bin/dexopt"; 637 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig 638 char zip_num[MAX_INT_LEN]; 639 char odex_num[MAX_INT_LEN]; 640 641 sprintf(zip_num, "%d", zip_fd); 642 sprintf(odex_num, "%d", odex_fd); 643 644 ALOGV("Running %s in=%s out=%s\n", DEX_OPT_BIN, input_file_name, output_file_name); 645 execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name, 646 dexopt_flags, (char*) NULL); 647 ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno)); 648 } 649 650 static void run_patchoat(int input_fd, int oat_fd, const char* input_file_name, 651 const char* output_file_name, const char *pkgname, const char *instruction_set) 652 { 653 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig 654 static const unsigned int MAX_INSTRUCTION_SET_LEN = 7; 655 656 static const char* PATCHOAT_BIN = "/system/bin/patchoat"; 657 if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) { 658 ALOGE("Instruction set %s longer than max length of %d", 659 instruction_set, MAX_INSTRUCTION_SET_LEN); 660 return; 661 } 662 663 /* input_file_name/input_fd should be the .odex/.oat file that is precompiled. I think*/ 664 char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN]; 665 char output_oat_fd_arg[strlen("--output-oat-fd=") + MAX_INT_LEN]; 666 char input_oat_fd_arg[strlen("--input-oat-fd=") + MAX_INT_LEN]; 667 const char* patched_image_location_arg = "--patched-image-location=/system/framework/boot.art"; 668 // The caller has already gotten all the locks we need. 669 const char* no_lock_arg = "--no-lock-output"; 670 sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set); 671 sprintf(output_oat_fd_arg, "--output-oat-fd=%d", oat_fd); 672 sprintf(input_oat_fd_arg, "--input-oat-fd=%d", input_fd); 673 ALOGE("Running %s isa=%s in-fd=%d (%s) out-fd=%d (%s)\n", 674 PATCHOAT_BIN, instruction_set, input_fd, input_file_name, oat_fd, output_file_name); 675 676 /* patchoat, patched-image-location, no-lock, isa, input-fd, output-fd */ 677 char* argv[7]; 678 argv[0] = (char*) PATCHOAT_BIN; 679 argv[1] = (char*) patched_image_location_arg; 680 argv[2] = (char*) no_lock_arg; 681 argv[3] = instruction_set_arg; 682 argv[4] = output_oat_fd_arg; 683 argv[5] = input_oat_fd_arg; 684 argv[6] = NULL; 685 686 execv(PATCHOAT_BIN, (char* const *)argv); 687 ALOGE("execv(%s) failed: %s\n", PATCHOAT_BIN, strerror(errno)); 688 } 689 690 static void run_dex2oat(int zip_fd, int oat_fd, const char* input_file_name, 691 const char* output_file_name, int swap_fd, const char *pkgname, const char *instruction_set, 692 bool vm_safe_mode) 693 { 694 static const unsigned int MAX_INSTRUCTION_SET_LEN = 7; 695 696 if (strlen(instruction_set) >= MAX_INSTRUCTION_SET_LEN) { 697 ALOGE("Instruction set %s longer than max length of %d", 698 instruction_set, MAX_INSTRUCTION_SET_LEN); 699 return; 700 } 701 702 char prop_buf[PROPERTY_VALUE_MAX]; 703 bool profiler = (property_get("dalvik.vm.profiler", prop_buf, "0") > 0) && (prop_buf[0] == '1'); 704 705 char dex2oat_Xms_flag[PROPERTY_VALUE_MAX]; 706 bool have_dex2oat_Xms_flag = property_get("dalvik.vm.dex2oat-Xms", dex2oat_Xms_flag, NULL) > 0; 707 708 char dex2oat_Xmx_flag[PROPERTY_VALUE_MAX]; 709 bool have_dex2oat_Xmx_flag = property_get("dalvik.vm.dex2oat-Xmx", dex2oat_Xmx_flag, NULL) > 0; 710 711 char dex2oat_compiler_filter_flag[PROPERTY_VALUE_MAX]; 712 bool have_dex2oat_compiler_filter_flag = property_get("dalvik.vm.dex2oat-filter", 713 dex2oat_compiler_filter_flag, NULL) > 0; 714 715 char dex2oat_isa_features_key[PROPERTY_KEY_MAX]; 716 sprintf(dex2oat_isa_features_key, "dalvik.vm.isa.%s.features", instruction_set); 717 char dex2oat_isa_features[PROPERTY_VALUE_MAX]; 718 bool have_dex2oat_isa_features = property_get(dex2oat_isa_features_key, 719 dex2oat_isa_features, NULL) > 0; 720 721 char dex2oat_flags[PROPERTY_VALUE_MAX]; 722 bool have_dex2oat_flags = property_get("dalvik.vm.dex2oat-flags", dex2oat_flags, NULL) > 0; 723 ALOGV("dalvik.vm.dex2oat-flags=%s\n", dex2oat_flags); 724 725 // If we booting without the real /data, don't spend time compiling. 726 char vold_decrypt[PROPERTY_VALUE_MAX]; 727 bool have_vold_decrypt = property_get("vold.decrypt", vold_decrypt, "") > 0; 728 bool skip_compilation = (have_vold_decrypt && 729 (strcmp(vold_decrypt, "trigger_restart_min_framework") == 0 || 730 (strcmp(vold_decrypt, "1") == 0))); 731 732 static const char* DEX2OAT_BIN = "/system/bin/dex2oat"; 733 734 static const char* RUNTIME_ARG = "--runtime-arg"; 735 736 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig 737 738 char zip_fd_arg[strlen("--zip-fd=") + MAX_INT_LEN]; 739 char zip_location_arg[strlen("--zip-location=") + PKG_PATH_MAX]; 740 char oat_fd_arg[strlen("--oat-fd=") + MAX_INT_LEN]; 741 char oat_location_arg[strlen("--oat-location=") + PKG_PATH_MAX]; 742 char instruction_set_arg[strlen("--instruction-set=") + MAX_INSTRUCTION_SET_LEN]; 743 char instruction_set_features_arg[strlen("--instruction-set-features=") + PROPERTY_VALUE_MAX]; 744 char profile_file_arg[strlen("--profile-file=") + PKG_PATH_MAX]; 745 char top_k_profile_threshold_arg[strlen("--top-k-profile-threshold=") + PROPERTY_VALUE_MAX]; 746 char dex2oat_Xms_arg[strlen("-Xms") + PROPERTY_VALUE_MAX]; 747 char dex2oat_Xmx_arg[strlen("-Xmx") + PROPERTY_VALUE_MAX]; 748 char dex2oat_compiler_filter_arg[strlen("--compiler-filter=") + PROPERTY_VALUE_MAX]; 749 bool have_dex2oat_swap_fd = false; 750 char dex2oat_swap_fd[strlen("--swap-fd=") + MAX_INT_LEN]; 751 752 sprintf(zip_fd_arg, "--zip-fd=%d", zip_fd); 753 sprintf(zip_location_arg, "--zip-location=%s", input_file_name); 754 sprintf(oat_fd_arg, "--oat-fd=%d", oat_fd); 755 sprintf(oat_location_arg, "--oat-location=%s", output_file_name); 756 sprintf(instruction_set_arg, "--instruction-set=%s", instruction_set); 757 sprintf(instruction_set_features_arg, "--instruction-set-features=%s", dex2oat_isa_features); 758 if (swap_fd >= 0) { 759 have_dex2oat_swap_fd = true; 760 sprintf(dex2oat_swap_fd, "--swap-fd=%d", swap_fd); 761 } 762 763 bool have_profile_file = false; 764 bool have_top_k_profile_threshold = false; 765 if (profiler && (strcmp(pkgname, "*") != 0)) { 766 char profile_file[PKG_PATH_MAX]; 767 snprintf(profile_file, sizeof(profile_file), "%s/%s", 768 DALVIK_CACHE_PREFIX "profiles", pkgname); 769 struct stat st; 770 if ((stat(profile_file, &st) == 0) && (st.st_size > 0)) { 771 sprintf(profile_file_arg, "--profile-file=%s", profile_file); 772 have_profile_file = true; 773 if (property_get("dalvik.vm.profile.top-k-thr", prop_buf, NULL) > 0) { 774 snprintf(top_k_profile_threshold_arg, sizeof(top_k_profile_threshold_arg), 775 "--top-k-profile-threshold=%s", prop_buf); 776 have_top_k_profile_threshold = true; 777 } 778 } 779 } 780 781 if (have_dex2oat_Xms_flag) { 782 sprintf(dex2oat_Xms_arg, "-Xms%s", dex2oat_Xms_flag); 783 } 784 if (have_dex2oat_Xmx_flag) { 785 sprintf(dex2oat_Xmx_arg, "-Xmx%s", dex2oat_Xmx_flag); 786 } 787 if (skip_compilation) { 788 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=verify-none"); 789 have_dex2oat_compiler_filter_flag = true; 790 } else if (vm_safe_mode) { 791 strcpy(dex2oat_compiler_filter_arg, "--compiler-filter=interpret-only"); 792 have_dex2oat_compiler_filter_flag = true; 793 } else if (have_dex2oat_compiler_filter_flag) { 794 sprintf(dex2oat_compiler_filter_arg, "--compiler-filter=%s", dex2oat_compiler_filter_flag); 795 } 796 797 ALOGV("Running %s in=%s out=%s\n", DEX2OAT_BIN, input_file_name, output_file_name); 798 799 char* argv[7 // program name, mandatory arguments and the final NULL 800 + (have_dex2oat_isa_features ? 1 : 0) 801 + (have_profile_file ? 1 : 0) 802 + (have_top_k_profile_threshold ? 1 : 0) 803 + (have_dex2oat_Xms_flag ? 2 : 0) 804 + (have_dex2oat_Xmx_flag ? 2 : 0) 805 + (have_dex2oat_compiler_filter_flag ? 1 : 0) 806 + (have_dex2oat_flags ? 1 : 0) 807 + (have_dex2oat_swap_fd ? 1 : 0)]; 808 int i = 0; 809 argv[i++] = (char*)DEX2OAT_BIN; 810 argv[i++] = zip_fd_arg; 811 argv[i++] = zip_location_arg; 812 argv[i++] = oat_fd_arg; 813 argv[i++] = oat_location_arg; 814 argv[i++] = instruction_set_arg; 815 if (have_dex2oat_isa_features) { 816 argv[i++] = instruction_set_features_arg; 817 } 818 if (have_profile_file) { 819 argv[i++] = profile_file_arg; 820 } 821 if (have_top_k_profile_threshold) { 822 argv[i++] = top_k_profile_threshold_arg; 823 } 824 if (have_dex2oat_Xms_flag) { 825 argv[i++] = (char*)RUNTIME_ARG; 826 argv[i++] = dex2oat_Xms_arg; 827 } 828 if (have_dex2oat_Xmx_flag) { 829 argv[i++] = (char*)RUNTIME_ARG; 830 argv[i++] = dex2oat_Xmx_arg; 831 } 832 if (have_dex2oat_compiler_filter_flag) { 833 argv[i++] = dex2oat_compiler_filter_arg; 834 } 835 if (have_dex2oat_flags) { 836 argv[i++] = dex2oat_flags; 837 } 838 if (have_dex2oat_swap_fd) { 839 argv[i++] = dex2oat_swap_fd; 840 } 841 // Do not add after dex2oat_flags, they should override others for debugging. 842 argv[i] = NULL; 843 844 execv(DEX2OAT_BIN, (char* const *)argv); 845 ALOGE("execl(%s) failed: %s\n", DEX2OAT_BIN, strerror(errno)); 846 } 847 848 static int wait_child(pid_t pid) 849 { 850 int status; 851 pid_t got_pid; 852 853 while (1) { 854 got_pid = waitpid(pid, &status, 0); 855 if (got_pid == -1 && errno == EINTR) { 856 printf("waitpid interrupted, retrying\n"); 857 } else { 858 break; 859 } 860 } 861 if (got_pid != pid) { 862 ALOGW("waitpid failed: wanted %d, got %d: %s\n", 863 (int) pid, (int) got_pid, strerror(errno)); 864 return 1; 865 } 866 867 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 868 return 0; 869 } else { 870 return status; /* always nonzero */ 871 } 872 } 873 874 /* 875 * Whether dexopt should use a swap file when compiling an APK. If kAlwaysProvideSwapFile, do this 876 * on all devices (dex2oat will make a more informed decision itself, anyways). Otherwise, only do 877 * this on a low-mem device. 878 */ 879 static bool kAlwaysProvideSwapFile = true; 880 881 static bool ShouldUseSwapFileForDexopt() { 882 if (kAlwaysProvideSwapFile) { 883 return true; 884 } 885 886 char low_mem_buf[PROPERTY_VALUE_MAX]; 887 property_get("ro.config.low_ram", low_mem_buf, ""); 888 return (strcmp(low_mem_buf, "true") == 0); 889 } 890 891 int dexopt(const char *apk_path, uid_t uid, bool is_public, 892 const char *pkgname, const char *instruction_set, 893 bool vm_safe_mode, bool is_patchoat) 894 { 895 struct utimbuf ut; 896 struct stat input_stat, dex_stat; 897 char out_path[PKG_PATH_MAX]; 898 char persist_sys_dalvik_vm_lib[PROPERTY_VALUE_MAX]; 899 char swap_file_name[PKG_PATH_MAX]; 900 char *end; 901 const char *input_file; 902 char in_odex_path[PKG_PATH_MAX]; 903 int res, input_fd=-1, out_fd=-1, swap_fd=-1; 904 905 // Early best-effort check whether we can fit the the path into our buffers. 906 // Note: the cache path will require an additional 5 bytes for ".swap", but we'll try to run 907 // without a swap file, if necessary. 908 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) { 909 return -1; 910 } 911 912 /* The command to run depend on the value of persist.sys.dalvik.vm.lib */ 913 property_get("persist.sys.dalvik.vm.lib.2", persist_sys_dalvik_vm_lib, "libart.so"); 914 915 if (is_patchoat && strncmp(persist_sys_dalvik_vm_lib, "libart", 6) != 0) { 916 /* We may only patch if we are libart */ 917 ALOGE("Patching is only supported in libart\n"); 918 return -1; 919 } 920 921 /* Before anything else: is there a .odex file? If so, we have 922 * precompiled the apk and there is nothing to do here. 923 * 924 * We skip this if we are doing a patchoat. 925 */ 926 strcpy(out_path, apk_path); 927 end = strrchr(out_path, '.'); 928 if (end != NULL && !is_patchoat) { 929 strcpy(end, ".odex"); 930 if (stat(out_path, &dex_stat) == 0) { 931 return 0; 932 } 933 } 934 935 if (create_cache_path(out_path, apk_path, instruction_set)) { 936 return -1; 937 } 938 939 if (is_patchoat) { 940 /* /system/framework/whatever.jar -> /system/framework/<isa>/whatever.odex */ 941 strcpy(in_odex_path, apk_path); 942 end = strrchr(in_odex_path, '/'); 943 if (end == NULL) { 944 ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path); 945 return -1; 946 } 947 const char *apk_end = apk_path + (end - in_odex_path); // strrchr(apk_path, '/'); 948 strcpy(end + 1, instruction_set); // in_odex_path now is /system/framework/<isa>\0 949 strcat(in_odex_path, apk_end); 950 end = strrchr(in_odex_path, '.'); 951 if (end == NULL) { 952 return -1; 953 } 954 strcpy(end + 1, "odex"); 955 input_file = in_odex_path; 956 } else { 957 input_file = apk_path; 958 } 959 960 memset(&input_stat, 0, sizeof(input_stat)); 961 stat(input_file, &input_stat); 962 963 input_fd = open(input_file, O_RDONLY, 0); 964 if (input_fd < 0) { 965 ALOGE("installd cannot open '%s' for input during dexopt\n", input_file); 966 return -1; 967 } 968 969 unlink(out_path); 970 out_fd = open(out_path, O_RDWR | O_CREAT | O_EXCL, 0644); 971 if (out_fd < 0) { 972 ALOGE("installd cannot open '%s' for output during dexopt\n", out_path); 973 goto fail; 974 } 975 if (fchmod(out_fd, 976 S_IRUSR|S_IWUSR|S_IRGRP | 977 (is_public ? S_IROTH : 0)) < 0) { 978 ALOGE("installd cannot chmod '%s' during dexopt\n", out_path); 979 goto fail; 980 } 981 if (fchown(out_fd, AID_SYSTEM, uid) < 0) { 982 ALOGE("installd cannot chown '%s' during dexopt\n", out_path); 983 goto fail; 984 } 985 986 // Create profile file if there is a package name present. 987 if (strcmp(pkgname, "*") != 0) { 988 create_profile_file(pkgname, uid); 989 } 990 991 // Create a swap file if necessary. 992 if (!is_patchoat && ShouldUseSwapFileForDexopt()) { 993 // Make sure there really is enough space. 994 size_t out_len = strlen(out_path); 995 if (out_len + strlen(".swap") + 1 <= PKG_PATH_MAX) { 996 strcpy(swap_file_name, out_path); 997 strcpy(swap_file_name + strlen(out_path), ".swap"); 998 unlink(swap_file_name); 999 swap_fd = open(swap_file_name, O_RDWR | O_CREAT | O_EXCL, 0600); 1000 if (swap_fd < 0) { 1001 // Could not create swap file. Optimistically go on and hope that we can compile 1002 // without it. 1003 ALOGE("installd could not create '%s' for swap during dexopt\n", swap_file_name); 1004 } else { 1005 // Immediately unlink. We don't really want to hit flash. 1006 unlink(swap_file_name); 1007 } 1008 } else { 1009 // Swap file path is too long. Try to run without. 1010 ALOGE("installd could not create swap file for path %s during dexopt\n", out_path); 1011 } 1012 } 1013 1014 ALOGV("DexInv: --- BEGIN '%s' ---\n", input_file); 1015 1016 pid_t pid; 1017 pid = fork(); 1018 if (pid == 0) { 1019 /* child -- drop privileges before continuing */ 1020 if (setgid(uid) != 0) { 1021 ALOGE("setgid(%d) failed in installd during dexopt\n", uid); 1022 exit(64); 1023 } 1024 if (setuid(uid) != 0) { 1025 ALOGE("setuid(%d) failed in installd during dexopt\n", uid); 1026 exit(65); 1027 } 1028 // drop capabilities 1029 struct __user_cap_header_struct capheader; 1030 struct __user_cap_data_struct capdata[2]; 1031 memset(&capheader, 0, sizeof(capheader)); 1032 memset(&capdata, 0, sizeof(capdata)); 1033 capheader.version = _LINUX_CAPABILITY_VERSION_3; 1034 if (capset(&capheader, &capdata[0]) < 0) { 1035 ALOGE("capset failed: %s\n", strerror(errno)); 1036 exit(66); 1037 } 1038 if (set_sched_policy(0, SP_BACKGROUND) < 0) { 1039 ALOGE("set_sched_policy failed: %s\n", strerror(errno)); 1040 exit(70); 1041 } 1042 if (setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND) < 0) { 1043 ALOGE("setpriority failed: %s\n", strerror(errno)); 1044 exit(71); 1045 } 1046 if (flock(out_fd, LOCK_EX | LOCK_NB) != 0) { 1047 ALOGE("flock(%s) failed: %s\n", out_path, strerror(errno)); 1048 exit(67); 1049 } 1050 1051 if (strncmp(persist_sys_dalvik_vm_lib, "libdvm", 6) == 0) { 1052 run_dexopt(input_fd, out_fd, input_file, out_path); 1053 } else if (strncmp(persist_sys_dalvik_vm_lib, "libart", 6) == 0) { 1054 if (is_patchoat) { 1055 run_patchoat(input_fd, out_fd, input_file, out_path, pkgname, instruction_set); 1056 } else { 1057 run_dex2oat(input_fd, out_fd, input_file, out_path, swap_fd, pkgname, 1058 instruction_set, vm_safe_mode); 1059 } 1060 } else { 1061 exit(69); /* Unexpected persist.sys.dalvik.vm.lib value */ 1062 } 1063 exit(68); /* only get here on exec failure */ 1064 } else { 1065 res = wait_child(pid); 1066 if (res == 0) { 1067 ALOGV("DexInv: --- END '%s' (success) ---\n", input_file); 1068 } else { 1069 ALOGE("DexInv: --- END '%s' --- status=0x%04x, process failed\n", input_file, res); 1070 goto fail; 1071 } 1072 } 1073 1074 ut.actime = input_stat.st_atime; 1075 ut.modtime = input_stat.st_mtime; 1076 utime(out_path, &ut); 1077 1078 close(out_fd); 1079 close(input_fd); 1080 if (swap_fd != -1) { 1081 close(swap_fd); 1082 } 1083 return 0; 1084 1085 fail: 1086 if (out_fd >= 0) { 1087 close(out_fd); 1088 unlink(out_path); 1089 } 1090 if (input_fd >= 0) { 1091 close(input_fd); 1092 } 1093 return -1; 1094 } 1095 1096 int mark_boot_complete(const char* instruction_set) 1097 { 1098 char boot_marker_path[PKG_PATH_MAX]; 1099 sprintf(boot_marker_path,"%s%s/.booting", DALVIK_CACHE_PREFIX, instruction_set); 1100 1101 ALOGV("mark_boot_complete : %s", boot_marker_path); 1102 if (unlink(boot_marker_path) != 0) { 1103 ALOGE("Unable to unlink boot marker at %s, error=%s", boot_marker_path, 1104 strerror(errno)); 1105 return -1; 1106 } 1107 1108 return 0; 1109 } 1110 1111 void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 1112 struct stat* statbuf) 1113 { 1114 while (path[basepos] != 0) { 1115 if (path[basepos] == '/') { 1116 path[basepos] = 0; 1117 if (lstat(path, statbuf) < 0) { 1118 ALOGV("Making directory: %s\n", path); 1119 if (mkdir(path, mode) == 0) { 1120 chown(path, uid, gid); 1121 } else { 1122 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 1123 } 1124 } 1125 path[basepos] = '/'; 1126 basepos++; 1127 } 1128 basepos++; 1129 } 1130 } 1131 1132 int movefileordir(char* srcpath, char* dstpath, int dstbasepos, 1133 int dstuid, int dstgid, struct stat* statbuf) 1134 { 1135 DIR *d; 1136 struct dirent *de; 1137 int res; 1138 1139 int srcend = strlen(srcpath); 1140 int dstend = strlen(dstpath); 1141 1142 if (lstat(srcpath, statbuf) < 0) { 1143 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno)); 1144 return 1; 1145 } 1146 1147 if ((statbuf->st_mode&S_IFDIR) == 0) { 1148 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH, 1149 dstuid, dstgid, statbuf); 1150 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid); 1151 if (rename(srcpath, dstpath) >= 0) { 1152 if (chown(dstpath, dstuid, dstgid) < 0) { 1153 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno)); 1154 unlink(dstpath); 1155 return 1; 1156 } 1157 } else { 1158 ALOGW("Unable to rename %s to %s: %s\n", 1159 srcpath, dstpath, strerror(errno)); 1160 return 1; 1161 } 1162 return 0; 1163 } 1164 1165 d = opendir(srcpath); 1166 if (d == NULL) { 1167 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno)); 1168 return 1; 1169 } 1170 1171 res = 0; 1172 1173 while ((de = readdir(d))) { 1174 const char *name = de->d_name; 1175 /* always skip "." and ".." */ 1176 if (name[0] == '.') { 1177 if (name[1] == 0) continue; 1178 if ((name[1] == '.') && (name[2] == 0)) continue; 1179 } 1180 1181 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) { 1182 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name); 1183 continue; 1184 } 1185 1186 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) { 1187 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name); 1188 continue; 1189 } 1190 1191 srcpath[srcend] = dstpath[dstend] = '/'; 1192 strcpy(srcpath+srcend+1, name); 1193 strcpy(dstpath+dstend+1, name); 1194 1195 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) { 1196 res = 1; 1197 } 1198 1199 // Note: we will be leaving empty directories behind in srcpath, 1200 // but that is okay, the package manager will be erasing all of the 1201 // data associated with .apks that disappear. 1202 1203 srcpath[srcend] = dstpath[dstend] = 0; 1204 } 1205 1206 closedir(d); 1207 return res; 1208 } 1209 1210 int movefiles() 1211 { 1212 DIR *d; 1213 int dfd, subfd; 1214 struct dirent *de; 1215 struct stat s; 1216 char buf[PKG_PATH_MAX+1]; 1217 int bufp, bufe, bufi, readlen; 1218 1219 char srcpkg[PKG_NAME_MAX]; 1220 char dstpkg[PKG_NAME_MAX]; 1221 char srcpath[PKG_PATH_MAX]; 1222 char dstpath[PKG_PATH_MAX]; 1223 int dstuid=-1, dstgid=-1; 1224 int hasspace; 1225 1226 d = opendir(UPDATE_COMMANDS_DIR_PREFIX); 1227 if (d == NULL) { 1228 goto done; 1229 } 1230 dfd = dirfd(d); 1231 1232 /* Iterate through all files in the directory, executing the 1233 * file movements requested there-in. 1234 */ 1235 while ((de = readdir(d))) { 1236 const char *name = de->d_name; 1237 1238 if (de->d_type == DT_DIR) { 1239 continue; 1240 } else { 1241 subfd = openat(dfd, name, O_RDONLY); 1242 if (subfd < 0) { 1243 ALOGW("Unable to open update commands at %s%s\n", 1244 UPDATE_COMMANDS_DIR_PREFIX, name); 1245 continue; 1246 } 1247 1248 bufp = 0; 1249 bufe = 0; 1250 buf[PKG_PATH_MAX] = 0; 1251 srcpkg[0] = dstpkg[0] = 0; 1252 while (1) { 1253 bufi = bufp; 1254 while (bufi < bufe && buf[bufi] != '\n') { 1255 bufi++; 1256 } 1257 if (bufi < bufe) { 1258 buf[bufi] = 0; 1259 ALOGV("Processing line: %s\n", buf+bufp); 1260 hasspace = 0; 1261 while (bufp < bufi && isspace(buf[bufp])) { 1262 hasspace = 1; 1263 bufp++; 1264 } 1265 if (buf[bufp] == '#' || bufp == bufi) { 1266 // skip comments and empty lines. 1267 } else if (hasspace) { 1268 if (dstpkg[0] == 0) { 1269 ALOGW("Path before package line in %s%s: %s\n", 1270 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 1271 } else if (srcpkg[0] == 0) { 1272 // Skip -- source package no longer exists. 1273 } else { 1274 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg); 1275 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) && 1276 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) { 1277 movefileordir(srcpath, dstpath, 1278 strlen(dstpath)-strlen(buf+bufp), 1279 dstuid, dstgid, &s); 1280 } 1281 } 1282 } else { 1283 char* div = strchr(buf+bufp, ':'); 1284 if (div == NULL) { 1285 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n", 1286 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 1287 } else { 1288 *div = 0; 1289 div++; 1290 if (strlen(buf+bufp) < PKG_NAME_MAX) { 1291 strcpy(dstpkg, buf+bufp); 1292 } else { 1293 srcpkg[0] = dstpkg[0] = 0; 1294 ALOGW("Package name too long in %s%s: %s\n", 1295 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 1296 } 1297 if (strlen(div) < PKG_NAME_MAX) { 1298 strcpy(srcpkg, div); 1299 } else { 1300 srcpkg[0] = dstpkg[0] = 0; 1301 ALOGW("Package name too long in %s%s: %s\n", 1302 UPDATE_COMMANDS_DIR_PREFIX, name, div); 1303 } 1304 if (srcpkg[0] != 0) { 1305 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) { 1306 if (lstat(srcpath, &s) < 0) { 1307 // Package no longer exists -- skip. 1308 srcpkg[0] = 0; 1309 } 1310 } else { 1311 srcpkg[0] = 0; 1312 ALOGW("Can't create path %s in %s%s\n", 1313 div, UPDATE_COMMANDS_DIR_PREFIX, name); 1314 } 1315 if (srcpkg[0] != 0) { 1316 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) { 1317 if (lstat(dstpath, &s) == 0) { 1318 dstuid = s.st_uid; 1319 dstgid = s.st_gid; 1320 } else { 1321 // Destination package doesn't 1322 // exist... due to original-package, 1323 // this is normal, so don't be 1324 // noisy about it. 1325 srcpkg[0] = 0; 1326 } 1327 } else { 1328 srcpkg[0] = 0; 1329 ALOGW("Can't create path %s in %s%s\n", 1330 div, UPDATE_COMMANDS_DIR_PREFIX, name); 1331 } 1332 } 1333 ALOGV("Transfering from %s to %s: uid=%d\n", 1334 srcpkg, dstpkg, dstuid); 1335 } 1336 } 1337 } 1338 bufp = bufi+1; 1339 } else { 1340 if (bufp == 0) { 1341 if (bufp < bufe) { 1342 ALOGW("Line too long in %s%s, skipping: %s\n", 1343 UPDATE_COMMANDS_DIR_PREFIX, name, buf); 1344 } 1345 } else if (bufp < bufe) { 1346 memcpy(buf, buf+bufp, bufe-bufp); 1347 bufe -= bufp; 1348 bufp = 0; 1349 } 1350 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe); 1351 if (readlen < 0) { 1352 ALOGW("Failure reading update commands in %s%s: %s\n", 1353 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno)); 1354 break; 1355 } else if (readlen == 0) { 1356 break; 1357 } 1358 bufe += readlen; 1359 buf[bufe] = 0; 1360 ALOGV("Read buf: %s\n", buf); 1361 } 1362 } 1363 close(subfd); 1364 } 1365 } 1366 closedir(d); 1367 done: 1368 return 0; 1369 } 1370 1371 int linklib(const char* pkgname, const char* asecLibDir, int userId) 1372 { 1373 char pkgdir[PKG_PATH_MAX]; 1374 char libsymlink[PKG_PATH_MAX]; 1375 struct stat s, libStat; 1376 int rc = 0; 1377 1378 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) { 1379 ALOGE("cannot create package path\n"); 1380 return -1; 1381 } 1382 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) { 1383 ALOGE("cannot create package lib symlink origin path\n"); 1384 return -1; 1385 } 1386 1387 if (stat(pkgdir, &s) < 0) return -1; 1388 1389 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1390 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno)); 1391 return -1; 1392 } 1393 1394 if (chmod(pkgdir, 0700) < 0) { 1395 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1396 rc = -1; 1397 goto out; 1398 } 1399 1400 if (lstat(libsymlink, &libStat) < 0) { 1401 if (errno != ENOENT) { 1402 ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); 1403 rc = -1; 1404 goto out; 1405 } 1406 } else { 1407 if (S_ISDIR(libStat.st_mode)) { 1408 if (delete_dir_contents(libsymlink, 1, NULL) < 0) { 1409 rc = -1; 1410 goto out; 1411 } 1412 } else if (S_ISLNK(libStat.st_mode)) { 1413 if (unlink(libsymlink) < 0) { 1414 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno)); 1415 rc = -1; 1416 goto out; 1417 } 1418 } 1419 } 1420 1421 if (symlink(asecLibDir, libsymlink) < 0) { 1422 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir, 1423 strerror(errno)); 1424 rc = -errno; 1425 goto out; 1426 } 1427 1428 out: 1429 if (chmod(pkgdir, s.st_mode) < 0) { 1430 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1431 rc = -errno; 1432 } 1433 1434 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1435 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno)); 1436 return -errno; 1437 } 1438 1439 return rc; 1440 } 1441 1442 static void run_idmap(const char *target_apk, const char *overlay_apk, int idmap_fd) 1443 { 1444 static const char *IDMAP_BIN = "/system/bin/idmap"; 1445 static const size_t MAX_INT_LEN = 32; 1446 char idmap_str[MAX_INT_LEN]; 1447 1448 snprintf(idmap_str, sizeof(idmap_str), "%d", idmap_fd); 1449 1450 execl(IDMAP_BIN, IDMAP_BIN, "--fd", target_apk, overlay_apk, idmap_str, (char*)NULL); 1451 ALOGE("execl(%s) failed: %s\n", IDMAP_BIN, strerror(errno)); 1452 } 1453 1454 // Transform string /a/b/c.apk to (prefix)/a@b (at) c.apk@(suffix) 1455 // eg /a/b/c.apk to /data/resource-cache/a@b (at) c.apk@idmap 1456 static int flatten_path(const char *prefix, const char *suffix, 1457 const char *overlay_path, char *idmap_path, size_t N) 1458 { 1459 if (overlay_path == NULL || idmap_path == NULL) { 1460 return -1; 1461 } 1462 const size_t len_overlay_path = strlen(overlay_path); 1463 // will access overlay_path + 1 further below; requires absolute path 1464 if (len_overlay_path < 2 || *overlay_path != '/') { 1465 return -1; 1466 } 1467 const size_t len_idmap_root = strlen(prefix); 1468 const size_t len_suffix = strlen(suffix); 1469 if (SIZE_MAX - len_idmap_root < len_overlay_path || 1470 SIZE_MAX - (len_idmap_root + len_overlay_path) < len_suffix) { 1471 // additions below would cause overflow 1472 return -1; 1473 } 1474 if (N < len_idmap_root + len_overlay_path + len_suffix) { 1475 return -1; 1476 } 1477 memset(idmap_path, 0, N); 1478 snprintf(idmap_path, N, "%s%s%s", prefix, overlay_path + 1, suffix); 1479 char *ch = idmap_path + len_idmap_root; 1480 while (*ch != '\0') { 1481 if (*ch == '/') { 1482 *ch = '@'; 1483 } 1484 ++ch; 1485 } 1486 return 0; 1487 } 1488 1489 int idmap(const char *target_apk, const char *overlay_apk, uid_t uid) 1490 { 1491 ALOGV("idmap target_apk=%s overlay_apk=%s uid=%d\n", target_apk, overlay_apk, uid); 1492 1493 int idmap_fd = -1; 1494 char idmap_path[PATH_MAX]; 1495 1496 if (flatten_path(IDMAP_PREFIX, IDMAP_SUFFIX, overlay_apk, 1497 idmap_path, sizeof(idmap_path)) == -1) { 1498 ALOGE("idmap cannot generate idmap path for overlay %s\n", overlay_apk); 1499 goto fail; 1500 } 1501 1502 unlink(idmap_path); 1503 idmap_fd = open(idmap_path, O_RDWR | O_CREAT | O_EXCL, 0644); 1504 if (idmap_fd < 0) { 1505 ALOGE("idmap cannot open '%s' for output: %s\n", idmap_path, strerror(errno)); 1506 goto fail; 1507 } 1508 if (fchown(idmap_fd, AID_SYSTEM, uid) < 0) { 1509 ALOGE("idmap cannot chown '%s'\n", idmap_path); 1510 goto fail; 1511 } 1512 if (fchmod(idmap_fd, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) < 0) { 1513 ALOGE("idmap cannot chmod '%s'\n", idmap_path); 1514 goto fail; 1515 } 1516 1517 pid_t pid; 1518 pid = fork(); 1519 if (pid == 0) { 1520 /* child -- drop privileges before continuing */ 1521 if (setgid(uid) != 0) { 1522 ALOGE("setgid(%d) failed during idmap\n", uid); 1523 exit(1); 1524 } 1525 if (setuid(uid) != 0) { 1526 ALOGE("setuid(%d) failed during idmap\n", uid); 1527 exit(1); 1528 } 1529 if (flock(idmap_fd, LOCK_EX | LOCK_NB) != 0) { 1530 ALOGE("flock(%s) failed during idmap: %s\n", idmap_path, strerror(errno)); 1531 exit(1); 1532 } 1533 1534 run_idmap(target_apk, overlay_apk, idmap_fd); 1535 exit(1); /* only if exec call to idmap failed */ 1536 } else { 1537 int status = wait_child(pid); 1538 if (status != 0) { 1539 ALOGE("idmap failed, status=0x%04x\n", status); 1540 goto fail; 1541 } 1542 } 1543 1544 close(idmap_fd); 1545 return 0; 1546 fail: 1547 if (idmap_fd >= 0) { 1548 close(idmap_fd); 1549 unlink(idmap_path); 1550 } 1551 return -1; 1552 } 1553 1554 int restorecon_data(const char* pkgName, const char* seinfo, uid_t uid) 1555 { 1556 struct dirent *entry; 1557 DIR *d; 1558 struct stat s; 1559 char *userdir; 1560 char *primarydir; 1561 char *pkgdir; 1562 int ret = 0; 1563 1564 // SELINUX_ANDROID_RESTORECON_DATADATA flag is set by libselinux. Not needed here. 1565 unsigned int flags = SELINUX_ANDROID_RESTORECON_RECURSE; 1566 1567 if (!pkgName || !seinfo) { 1568 ALOGE("Package name or seinfo tag is null when trying to restorecon."); 1569 return -1; 1570 } 1571 1572 if (asprintf(&primarydir, "%s%s%s", android_data_dir.path, PRIMARY_USER_PREFIX, pkgName) < 0) { 1573 return -1; 1574 } 1575 1576 // Relabel for primary user. 1577 if (selinux_android_restorecon_pkgdir(primarydir, seinfo, uid, flags) < 0) { 1578 ALOGE("restorecon failed for %s: %s\n", primarydir, strerror(errno)); 1579 ret |= -1; 1580 } 1581 1582 if (asprintf(&userdir, "%s%s", android_data_dir.path, SECONDARY_USER_PREFIX) < 0) { 1583 free(primarydir); 1584 return -1; 1585 } 1586 1587 // Relabel package directory for all secondary users. 1588 d = opendir(userdir); 1589 if (d == NULL) { 1590 free(primarydir); 1591 free(userdir); 1592 return -1; 1593 } 1594 1595 while ((entry = readdir(d))) { 1596 if (entry->d_type != DT_DIR) { 1597 continue; 1598 } 1599 1600 const char *user = entry->d_name; 1601 // Ignore "." and ".." 1602 if (!strcmp(user, ".") || !strcmp(user, "..")) { 1603 continue; 1604 } 1605 1606 // user directories start with a number 1607 if (user[0] < '0' || user[0] > '9') { 1608 ALOGE("Expecting numbered directory during restorecon. Instead got '%s'.", user); 1609 continue; 1610 } 1611 1612 if (asprintf(&pkgdir, "%s%s/%s", userdir, user, pkgName) < 0) { 1613 continue; 1614 } 1615 1616 if (stat(pkgdir, &s) < 0) { 1617 free(pkgdir); 1618 continue; 1619 } 1620 1621 if (selinux_android_restorecon_pkgdir(pkgdir, seinfo, uid, flags) < 0) { 1622 ALOGE("restorecon failed for %s: %s\n", pkgdir, strerror(errno)); 1623 ret |= -1; 1624 } 1625 free(pkgdir); 1626 } 1627 1628 closedir(d); 1629 free(primarydir); 1630 free(userdir); 1631 return ret; 1632 } 1633 1634
