1 /* 2 ** Copyright 2008, The Android Open Source Project 3 ** 4 ** Licensed under the Apache License, Version 2.0 (the "License"); 5 ** you may not use this file except in compliance with the License. 6 ** You may obtain a copy of the License at 7 ** 8 ** http://www.apache.org/licenses/LICENSE-2.0 9 ** 10 ** Unless required by applicable law or agreed to in writing, software 11 ** distributed under the License is distributed on an "AS IS" BASIS, 12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ** See the License for the specific language governing permissions and 14 ** limitations under the License. 15 */ 16 17 #include <sys/capability.h> 18 #include "installd.h" 19 #include <diskusage/dirsize.h> 20 #include <selinux/android.h> 21 22 /* Directory records that are used in execution of commands. */ 23 dir_rec_t android_data_dir; 24 dir_rec_t android_asec_dir; 25 dir_rec_t android_app_dir; 26 dir_rec_t android_app_private_dir; 27 dir_rec_t android_app_lib_dir; 28 dir_rec_t android_media_dir; 29 dir_rec_array_t android_system_dirs; 30 31 int install(const char *pkgname, uid_t uid, gid_t gid, const char *seinfo) 32 { 33 char pkgdir[PKG_PATH_MAX]; 34 char libsymlink[PKG_PATH_MAX]; 35 char applibdir[PKG_PATH_MAX]; 36 struct stat libStat; 37 38 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { 39 ALOGE("invalid uid/gid: %d %d\n", uid, gid); 40 return -1; 41 } 42 43 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { 44 ALOGE("cannot create package path\n"); 45 return -1; 46 } 47 48 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, 0)) { 49 ALOGE("cannot create package lib symlink origin path\n"); 50 return -1; 51 } 52 53 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { 54 ALOGE("cannot create package lib symlink dest path\n"); 55 return -1; 56 } 57 58 if (mkdir(pkgdir, 0751) < 0) { 59 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); 60 return -1; 61 } 62 if (chmod(pkgdir, 0751) < 0) { 63 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 64 unlink(pkgdir); 65 return -1; 66 } 67 68 if (lstat(libsymlink, &libStat) < 0) { 69 if (errno != ENOENT) { 70 ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); 71 return -1; 72 } 73 } else { 74 if (S_ISDIR(libStat.st_mode)) { 75 if (delete_dir_contents(libsymlink, 1, 0) < 0) { 76 ALOGE("couldn't delete lib directory during install for: %s", libsymlink); 77 return -1; 78 } 79 } else if (S_ISLNK(libStat.st_mode)) { 80 if (unlink(libsymlink) < 0) { 81 ALOGE("couldn't unlink lib directory during install for: %s", libsymlink); 82 return -1; 83 } 84 } 85 } 86 87 if (symlink(applibdir, libsymlink) < 0) { 88 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, applibdir, 89 strerror(errno)); 90 unlink(pkgdir); 91 return -1; 92 } 93 94 if (selinux_android_setfilecon2(pkgdir, pkgname, seinfo, uid) < 0) { 95 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); 96 unlink(libsymlink); 97 unlink(pkgdir); 98 return -errno; 99 } 100 101 if (chown(pkgdir, uid, gid) < 0) { 102 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 103 unlink(libsymlink); 104 unlink(pkgdir); 105 return -1; 106 } 107 108 return 0; 109 } 110 111 int uninstall(const char *pkgname, uid_t persona) 112 { 113 char pkgdir[PKG_PATH_MAX]; 114 115 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) 116 return -1; 117 118 /* delete contents AND directory, no exceptions */ 119 return delete_dir_contents(pkgdir, 1, NULL); 120 } 121 122 int renamepkg(const char *oldpkgname, const char *newpkgname) 123 { 124 char oldpkgdir[PKG_PATH_MAX]; 125 char newpkgdir[PKG_PATH_MAX]; 126 127 if (create_pkg_path(oldpkgdir, oldpkgname, PKG_DIR_POSTFIX, 0)) 128 return -1; 129 if (create_pkg_path(newpkgdir, newpkgname, PKG_DIR_POSTFIX, 0)) 130 return -1; 131 132 if (rename(oldpkgdir, newpkgdir) < 0) { 133 ALOGE("cannot rename dir '%s' to '%s': %s\n", oldpkgdir, newpkgdir, strerror(errno)); 134 return -errno; 135 } 136 return 0; 137 } 138 139 int fix_uid(const char *pkgname, uid_t uid, gid_t gid) 140 { 141 char pkgdir[PKG_PATH_MAX]; 142 struct stat s; 143 int rc = 0; 144 145 if ((uid < AID_SYSTEM) || (gid < AID_SYSTEM)) { 146 ALOGE("invalid uid/gid: %d %d\n", uid, gid); 147 return -1; 148 } 149 150 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, 0)) { 151 ALOGE("cannot create package path\n"); 152 return -1; 153 } 154 155 if (stat(pkgdir, &s) < 0) return -1; 156 157 if (s.st_uid != 0 || s.st_gid != 0) { 158 ALOGE("fixing uid of non-root pkg: %s %lu %lu\n", pkgdir, s.st_uid, s.st_gid); 159 return -1; 160 } 161 162 if (chmod(pkgdir, 0751) < 0) { 163 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 164 unlink(pkgdir); 165 return -errno; 166 } 167 if (chown(pkgdir, uid, gid) < 0) { 168 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 169 unlink(pkgdir); 170 return -errno; 171 } 172 173 return 0; 174 } 175 176 int delete_user_data(const char *pkgname, uid_t persona) 177 { 178 char pkgdir[PKG_PATH_MAX]; 179 180 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) 181 return -1; 182 183 /* delete contents, excluding "lib", but not the directory itself */ 184 return delete_dir_contents(pkgdir, 0, "lib"); 185 } 186 187 int make_user_data(const char *pkgname, uid_t uid, uid_t persona) 188 { 189 char pkgdir[PKG_PATH_MAX]; 190 char applibdir[PKG_PATH_MAX]; 191 char libsymlink[PKG_PATH_MAX]; 192 struct stat libStat; 193 194 // Create the data dir for the package 195 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, persona)) { 196 return -1; 197 } 198 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, persona)) { 199 ALOGE("cannot create package lib symlink origin path\n"); 200 return -1; 201 } 202 if (create_pkg_path_in_dir(applibdir, &android_app_lib_dir, pkgname, PKG_DIR_POSTFIX)) { 203 ALOGE("cannot create package lib symlink dest path\n"); 204 return -1; 205 } 206 207 if (mkdir(pkgdir, 0751) < 0) { 208 ALOGE("cannot create dir '%s': %s\n", pkgdir, strerror(errno)); 209 return -errno; 210 } 211 if (chmod(pkgdir, 0751) < 0) { 212 ALOGE("cannot chmod dir '%s': %s\n", pkgdir, strerror(errno)); 213 unlink(pkgdir); 214 return -errno; 215 } 216 217 if (lstat(libsymlink, &libStat) < 0) { 218 if (errno != ENOENT) { 219 ALOGE("couldn't stat lib dir for non-primary: %s\n", strerror(errno)); 220 unlink(pkgdir); 221 return -1; 222 } 223 } else { 224 if (S_ISDIR(libStat.st_mode)) { 225 if (delete_dir_contents(libsymlink, 1, 0) < 0) { 226 ALOGE("couldn't delete lib directory during install for non-primary: %s", 227 libsymlink); 228 unlink(pkgdir); 229 return -1; 230 } 231 } else if (S_ISLNK(libStat.st_mode)) { 232 if (unlink(libsymlink) < 0) { 233 ALOGE("couldn't unlink lib directory during install for non-primary: %s", 234 libsymlink); 235 unlink(pkgdir); 236 return -1; 237 } 238 } 239 } 240 241 if (symlink(applibdir, libsymlink) < 0) { 242 ALOGE("couldn't symlink directory for non-primary '%s' -> '%s': %s\n", libsymlink, 243 applibdir, strerror(errno)); 244 unlink(pkgdir); 245 return -1; 246 } 247 248 if (selinux_android_setfilecon(pkgdir, pkgname, uid) < 0) { 249 ALOGE("cannot setfilecon dir '%s': %s\n", pkgdir, strerror(errno)); 250 unlink(libsymlink); 251 unlink(pkgdir); 252 return -errno; 253 } 254 255 if (chown(pkgdir, uid, uid) < 0) { 256 ALOGE("cannot chown dir '%s': %s\n", pkgdir, strerror(errno)); 257 unlink(libsymlink); 258 unlink(pkgdir); 259 return -errno; 260 } 261 262 return 0; 263 } 264 265 int delete_persona(uid_t persona) 266 { 267 char data_path[PKG_PATH_MAX]; 268 if (create_persona_path(data_path, persona)) { 269 return -1; 270 } 271 if (delete_dir_contents(data_path, 1, NULL)) { 272 return -1; 273 } 274 275 char media_path[PATH_MAX]; 276 if (create_persona_media_path(media_path, (userid_t) persona) == -1) { 277 return -1; 278 } 279 if (delete_dir_contents(media_path, 1, NULL) == -1) { 280 return -1; 281 } 282 283 return 0; 284 } 285 286 int delete_cache(const char *pkgname, uid_t persona) 287 { 288 char cachedir[PKG_PATH_MAX]; 289 290 if (create_pkg_path(cachedir, pkgname, CACHE_DIR_POSTFIX, persona)) 291 return -1; 292 293 /* delete contents, not the directory, no exceptions */ 294 return delete_dir_contents(cachedir, 0, 0); 295 } 296 297 /* Try to ensure free_size bytes of storage are available. 298 * Returns 0 on success. 299 * This is rather simple-minded because doing a full LRU would 300 * be potentially memory-intensive, and without atime it would 301 * also require that apps constantly modify file metadata even 302 * when just reading from the cache, which is pretty awful. 303 */ 304 int free_cache(int64_t free_size) 305 { 306 cache_t* cache; 307 int64_t avail; 308 DIR *d; 309 struct dirent *de; 310 char tmpdir[PATH_MAX]; 311 char *dirpos; 312 313 avail = data_disk_free(); 314 if (avail < 0) return -1; 315 316 ALOGI("free_cache(%" PRId64 ") avail %" PRId64 "\n", free_size, avail); 317 if (avail >= free_size) return 0; 318 319 cache = start_cache_collection(); 320 321 // Collect cache files for primary user. 322 if (create_persona_path(tmpdir, 0) == 0) { 323 //ALOGI("adding cache files from %s\n", tmpdir); 324 add_cache_files(cache, tmpdir, "cache"); 325 } 326 327 // Search for other users and add any cache files from them. 328 snprintf(tmpdir, sizeof(tmpdir), "%s%s", android_data_dir.path, 329 SECONDARY_USER_PREFIX); 330 dirpos = tmpdir + strlen(tmpdir); 331 d = opendir(tmpdir); 332 if (d != NULL) { 333 while ((de = readdir(d))) { 334 if (de->d_type == DT_DIR) { 335 const char *name = de->d_name; 336 /* always skip "." and ".." */ 337 if (name[0] == '.') { 338 if (name[1] == 0) continue; 339 if ((name[1] == '.') && (name[2] == 0)) continue; 340 } 341 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) { 342 strcpy(dirpos, name); 343 //ALOGI("adding cache files from %s\n", tmpdir); 344 add_cache_files(cache, tmpdir, "cache"); 345 } else { 346 ALOGW("Path exceeds limit: %s%s", tmpdir, name); 347 } 348 } 349 } 350 closedir(d); 351 } 352 353 // Collect cache files on external storage for all users (if it is mounted as part 354 // of the internal storage). 355 strcpy(tmpdir, android_media_dir.path); 356 dirpos = tmpdir + strlen(tmpdir); 357 d = opendir(tmpdir); 358 if (d != NULL) { 359 while ((de = readdir(d))) { 360 if (de->d_type == DT_DIR) { 361 const char *name = de->d_name; 362 /* skip any dir that doesn't start with a number, so not a user */ 363 if (name[0] < '0' || name[0] > '9') { 364 continue; 365 } 366 if ((strlen(name)+(dirpos-tmpdir)) < (sizeof(tmpdir)-1)) { 367 strcpy(dirpos, name); 368 if (lookup_media_dir(tmpdir, "Android") == 0 369 && lookup_media_dir(tmpdir, "data") == 0) { 370 //ALOGI("adding cache files from %s\n", tmpdir); 371 add_cache_files(cache, tmpdir, "cache"); 372 } 373 } else { 374 ALOGW("Path exceeds limit: %s%s", tmpdir, name); 375 } 376 } 377 } 378 closedir(d); 379 } 380 381 clear_cache_files(cache, free_size); 382 finish_cache_collection(cache); 383 384 return data_disk_free() >= free_size ? 0 : -1; 385 } 386 387 int move_dex(const char *src, const char *dst) 388 { 389 char src_dex[PKG_PATH_MAX]; 390 char dst_dex[PKG_PATH_MAX]; 391 392 if (validate_apk_path(src)) return -1; 393 if (validate_apk_path(dst)) return -1; 394 395 if (create_cache_path(src_dex, src)) return -1; 396 if (create_cache_path(dst_dex, dst)) return -1; 397 398 ALOGV("move %s -> %s\n", src_dex, dst_dex); 399 if (rename(src_dex, dst_dex) < 0) { 400 ALOGE("Couldn't move %s: %s\n", src_dex, strerror(errno)); 401 return -1; 402 } else { 403 return 0; 404 } 405 } 406 407 int rm_dex(const char *path) 408 { 409 char dex_path[PKG_PATH_MAX]; 410 411 if (validate_apk_path(path)) return -1; 412 if (create_cache_path(dex_path, path)) return -1; 413 414 ALOGV("unlink %s\n", dex_path); 415 if (unlink(dex_path) < 0) { 416 ALOGE("Couldn't unlink %s: %s\n", dex_path, strerror(errno)); 417 return -1; 418 } else { 419 return 0; 420 } 421 } 422 423 int get_size(const char *pkgname, int persona, const char *apkpath, 424 const char *libdirpath, const char *fwdlock_apkpath, const char *asecpath, 425 int64_t *_codesize, int64_t *_datasize, int64_t *_cachesize, 426 int64_t* _asecsize) 427 { 428 DIR *d; 429 int dfd; 430 struct dirent *de; 431 struct stat s; 432 char path[PKG_PATH_MAX]; 433 434 int64_t codesize = 0; 435 int64_t datasize = 0; 436 int64_t cachesize = 0; 437 int64_t asecsize = 0; 438 439 /* count the source apk as code -- but only if it's not 440 * on the /system partition and its not on the sdcard. 441 */ 442 if (validate_system_app_path(apkpath) && 443 strncmp(apkpath, android_asec_dir.path, android_asec_dir.len) != 0) { 444 if (stat(apkpath, &s) == 0) { 445 codesize += stat_size(&s); 446 } 447 } 448 /* count the forward locked apk as code if it is given 449 */ 450 if (fwdlock_apkpath != NULL && fwdlock_apkpath[0] != '!') { 451 if (stat(fwdlock_apkpath, &s) == 0) { 452 codesize += stat_size(&s); 453 } 454 } 455 /* count the cached dexfile as code */ 456 if (!create_cache_path(path, apkpath)) { 457 if (stat(path, &s) == 0) { 458 codesize += stat_size(&s); 459 } 460 } 461 462 /* add in size of any libraries */ 463 if (libdirpath != NULL && libdirpath[0] != '!') { 464 d = opendir(libdirpath); 465 if (d != NULL) { 466 dfd = dirfd(d); 467 codesize += calculate_dir_size(dfd); 468 closedir(d); 469 } 470 } 471 472 /* compute asec size if it is given 473 */ 474 if (asecpath != NULL && asecpath[0] != '!') { 475 if (stat(asecpath, &s) == 0) { 476 asecsize += stat_size(&s); 477 } 478 } 479 480 if (create_pkg_path(path, pkgname, PKG_DIR_POSTFIX, persona)) { 481 goto done; 482 } 483 484 d = opendir(path); 485 if (d == NULL) { 486 goto done; 487 } 488 dfd = dirfd(d); 489 490 /* most stuff in the pkgdir is data, except for the "cache" 491 * directory and below, which is cache, and the "lib" directory 492 * and below, which is code... 493 */ 494 while ((de = readdir(d))) { 495 const char *name = de->d_name; 496 497 if (de->d_type == DT_DIR) { 498 int subfd; 499 int64_t statsize = 0; 500 int64_t dirsize = 0; 501 /* always skip "." and ".." */ 502 if (name[0] == '.') { 503 if (name[1] == 0) continue; 504 if ((name[1] == '.') && (name[2] == 0)) continue; 505 } 506 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 507 statsize = stat_size(&s); 508 } 509 subfd = openat(dfd, name, O_RDONLY | O_DIRECTORY); 510 if (subfd >= 0) { 511 dirsize = calculate_dir_size(subfd); 512 } 513 if(!strcmp(name,"lib")) { 514 codesize += dirsize + statsize; 515 } else if(!strcmp(name,"cache")) { 516 cachesize += dirsize + statsize; 517 } else { 518 datasize += dirsize + statsize; 519 } 520 } else if (de->d_type == DT_LNK && !strcmp(name,"lib")) { 521 // This is the symbolic link to the application's library 522 // code. We'll count this as code instead of data, since 523 // it is not something that the app creates. 524 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 525 codesize += stat_size(&s); 526 } 527 } else { 528 if (fstatat(dfd, name, &s, AT_SYMLINK_NOFOLLOW) == 0) { 529 datasize += stat_size(&s); 530 } 531 } 532 } 533 closedir(d); 534 done: 535 *_codesize = codesize; 536 *_datasize = datasize; 537 *_cachesize = cachesize; 538 *_asecsize = asecsize; 539 return 0; 540 } 541 542 543 /* a simpler version of dexOptGenerateCacheFileName() */ 544 int create_cache_path(char path[PKG_PATH_MAX], const char *src) 545 { 546 char *tmp; 547 int srclen; 548 int dstlen; 549 550 srclen = strlen(src); 551 552 /* demand that we are an absolute path */ 553 if ((src == 0) || (src[0] != '/') || strstr(src,"..")) { 554 return -1; 555 } 556 557 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX? 558 return -1; 559 } 560 561 dstlen = srclen + strlen(DALVIK_CACHE_PREFIX) + 562 strlen(DALVIK_CACHE_POSTFIX) + 1; 563 564 if (dstlen > PKG_PATH_MAX) { 565 return -1; 566 } 567 568 sprintf(path,"%s%s%s", 569 DALVIK_CACHE_PREFIX, 570 src + 1, /* skip the leading / */ 571 DALVIK_CACHE_POSTFIX); 572 573 for(tmp = path + strlen(DALVIK_CACHE_PREFIX); *tmp; tmp++) { 574 if (*tmp == '/') { 575 *tmp = '@'; 576 } 577 } 578 579 return 0; 580 } 581 582 static void run_dexopt(int zip_fd, int odex_fd, const char* input_file_name, 583 const char* dexopt_flags) 584 { 585 static const char* DEX_OPT_BIN = "/system/bin/dexopt"; 586 static const int MAX_INT_LEN = 12; // '-'+10dig+'\0' -OR- 0x+8dig 587 char zip_num[MAX_INT_LEN]; 588 char odex_num[MAX_INT_LEN]; 589 590 sprintf(zip_num, "%d", zip_fd); 591 sprintf(odex_num, "%d", odex_fd); 592 593 execl(DEX_OPT_BIN, DEX_OPT_BIN, "--zip", zip_num, odex_num, input_file_name, 594 dexopt_flags, (char*) NULL); 595 ALOGE("execl(%s) failed: %s\n", DEX_OPT_BIN, strerror(errno)); 596 } 597 598 static int wait_dexopt(pid_t pid, const char* apk_path) 599 { 600 int status; 601 pid_t got_pid; 602 603 /* 604 * Wait for the optimization process to finish. 605 */ 606 while (1) { 607 got_pid = waitpid(pid, &status, 0); 608 if (got_pid == -1 && errno == EINTR) { 609 printf("waitpid interrupted, retrying\n"); 610 } else { 611 break; 612 } 613 } 614 if (got_pid != pid) { 615 ALOGW("waitpid failed: wanted %d, got %d: %s\n", 616 (int) pid, (int) got_pid, strerror(errno)); 617 return 1; 618 } 619 620 if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { 621 ALOGV("DexInv: --- END '%s' (success) ---\n", apk_path); 622 return 0; 623 } else { 624 ALOGW("DexInv: --- END '%s' --- status=0x%04x, process failed\n", 625 apk_path, status); 626 return status; /* always nonzero */ 627 } 628 } 629 630 int dexopt(const char *apk_path, uid_t uid, int is_public) 631 { 632 struct utimbuf ut; 633 struct stat apk_stat, dex_stat; 634 char dex_path[PKG_PATH_MAX]; 635 char dexopt_flags[PROPERTY_VALUE_MAX]; 636 char *end; 637 int res, zip_fd=-1, odex_fd=-1; 638 639 /* Before anything else: is there a .odex file? If so, we have 640 * pre-optimized the apk and there is nothing to do here. 641 */ 642 if (strlen(apk_path) >= (PKG_PATH_MAX - 8)) { 643 return -1; 644 } 645 646 /* platform-specific flags affecting optimization and verification */ 647 property_get("dalvik.vm.dexopt-flags", dexopt_flags, ""); 648 649 strcpy(dex_path, apk_path); 650 end = strrchr(dex_path, '.'); 651 if (end != NULL) { 652 strcpy(end, ".odex"); 653 if (stat(dex_path, &dex_stat) == 0) { 654 return 0; 655 } 656 } 657 658 if (create_cache_path(dex_path, apk_path)) { 659 return -1; 660 } 661 662 memset(&apk_stat, 0, sizeof(apk_stat)); 663 stat(apk_path, &apk_stat); 664 665 zip_fd = open(apk_path, O_RDONLY, 0); 666 if (zip_fd < 0) { 667 ALOGE("dexopt cannot open '%s' for input\n", apk_path); 668 return -1; 669 } 670 671 unlink(dex_path); 672 odex_fd = open(dex_path, O_RDWR | O_CREAT | O_EXCL, 0644); 673 if (odex_fd < 0) { 674 ALOGE("dexopt cannot open '%s' for output\n", dex_path); 675 goto fail; 676 } 677 if (fchmod(odex_fd, 678 S_IRUSR|S_IWUSR|S_IRGRP | 679 (is_public ? S_IROTH : 0)) < 0) { 680 ALOGE("dexopt cannot chmod '%s'\n", dex_path); 681 goto fail; 682 } 683 if (fchown(odex_fd, AID_SYSTEM, uid) < 0) { 684 ALOGE("dexopt cannot chown '%s'\n", dex_path); 685 goto fail; 686 } 687 688 ALOGV("DexInv: --- BEGIN '%s' ---\n", apk_path); 689 690 pid_t pid; 691 pid = fork(); 692 if (pid == 0) { 693 /* child -- drop privileges before continuing */ 694 if (setgid(uid) != 0) { 695 ALOGE("setgid(%d) failed during dexopt\n", uid); 696 exit(64); 697 } 698 if (setuid(uid) != 0) { 699 ALOGE("setuid(%d) during dexopt\n", uid); 700 exit(65); 701 } 702 // drop capabilities 703 struct __user_cap_header_struct capheader; 704 struct __user_cap_data_struct capdata[2]; 705 memset(&capheader, 0, sizeof(capheader)); 706 memset(&capdata, 0, sizeof(capdata)); 707 capheader.version = _LINUX_CAPABILITY_VERSION_3; 708 if (capset(&capheader, &capdata[0]) < 0) { 709 ALOGE("capset failed: %s\n", strerror(errno)); 710 exit(66); 711 } 712 if (flock(odex_fd, LOCK_EX | LOCK_NB) != 0) { 713 ALOGE("flock(%s) failed: %s\n", dex_path, strerror(errno)); 714 exit(67); 715 } 716 717 run_dexopt(zip_fd, odex_fd, apk_path, dexopt_flags); 718 exit(68); /* only get here on exec failure */ 719 } else { 720 res = wait_dexopt(pid, apk_path); 721 if (res != 0) { 722 ALOGE("dexopt failed on '%s' res = %d\n", dex_path, res); 723 goto fail; 724 } 725 } 726 727 ut.actime = apk_stat.st_atime; 728 ut.modtime = apk_stat.st_mtime; 729 utime(dex_path, &ut); 730 731 close(odex_fd); 732 close(zip_fd); 733 return 0; 734 735 fail: 736 if (odex_fd >= 0) { 737 close(odex_fd); 738 unlink(dex_path); 739 } 740 if (zip_fd >= 0) { 741 close(zip_fd); 742 } 743 return -1; 744 } 745 746 void mkinnerdirs(char* path, int basepos, mode_t mode, int uid, int gid, 747 struct stat* statbuf) 748 { 749 while (path[basepos] != 0) { 750 if (path[basepos] == '/') { 751 path[basepos] = 0; 752 if (lstat(path, statbuf) < 0) { 753 ALOGV("Making directory: %s\n", path); 754 if (mkdir(path, mode) == 0) { 755 chown(path, uid, gid); 756 } else { 757 ALOGW("Unable to make directory %s: %s\n", path, strerror(errno)); 758 } 759 } 760 path[basepos] = '/'; 761 basepos++; 762 } 763 basepos++; 764 } 765 } 766 767 int movefileordir(char* srcpath, char* dstpath, int dstbasepos, 768 int dstuid, int dstgid, struct stat* statbuf) 769 { 770 DIR *d; 771 struct dirent *de; 772 int res; 773 774 int srcend = strlen(srcpath); 775 int dstend = strlen(dstpath); 776 777 if (lstat(srcpath, statbuf) < 0) { 778 ALOGW("Unable to stat %s: %s\n", srcpath, strerror(errno)); 779 return 1; 780 } 781 782 if ((statbuf->st_mode&S_IFDIR) == 0) { 783 mkinnerdirs(dstpath, dstbasepos, S_IRWXU|S_IRWXG|S_IXOTH, 784 dstuid, dstgid, statbuf); 785 ALOGV("Renaming %s to %s (uid %d)\n", srcpath, dstpath, dstuid); 786 if (rename(srcpath, dstpath) >= 0) { 787 if (chown(dstpath, dstuid, dstgid) < 0) { 788 ALOGE("cannot chown %s: %s\n", dstpath, strerror(errno)); 789 unlink(dstpath); 790 return 1; 791 } 792 } else { 793 ALOGW("Unable to rename %s to %s: %s\n", 794 srcpath, dstpath, strerror(errno)); 795 return 1; 796 } 797 return 0; 798 } 799 800 d = opendir(srcpath); 801 if (d == NULL) { 802 ALOGW("Unable to opendir %s: %s\n", srcpath, strerror(errno)); 803 return 1; 804 } 805 806 res = 0; 807 808 while ((de = readdir(d))) { 809 const char *name = de->d_name; 810 /* always skip "." and ".." */ 811 if (name[0] == '.') { 812 if (name[1] == 0) continue; 813 if ((name[1] == '.') && (name[2] == 0)) continue; 814 } 815 816 if ((srcend+strlen(name)) >= (PKG_PATH_MAX-2)) { 817 ALOGW("Source path too long; skipping: %s/%s\n", srcpath, name); 818 continue; 819 } 820 821 if ((dstend+strlen(name)) >= (PKG_PATH_MAX-2)) { 822 ALOGW("Destination path too long; skipping: %s/%s\n", dstpath, name); 823 continue; 824 } 825 826 srcpath[srcend] = dstpath[dstend] = '/'; 827 strcpy(srcpath+srcend+1, name); 828 strcpy(dstpath+dstend+1, name); 829 830 if (movefileordir(srcpath, dstpath, dstbasepos, dstuid, dstgid, statbuf) != 0) { 831 res = 1; 832 } 833 834 // Note: we will be leaving empty directories behind in srcpath, 835 // but that is okay, the package manager will be erasing all of the 836 // data associated with .apks that disappear. 837 838 srcpath[srcend] = dstpath[dstend] = 0; 839 } 840 841 closedir(d); 842 return res; 843 } 844 845 int movefiles() 846 { 847 DIR *d; 848 int dfd, subfd; 849 struct dirent *de; 850 struct stat s; 851 char buf[PKG_PATH_MAX+1]; 852 int bufp, bufe, bufi, readlen; 853 854 char srcpkg[PKG_NAME_MAX]; 855 char dstpkg[PKG_NAME_MAX]; 856 char srcpath[PKG_PATH_MAX]; 857 char dstpath[PKG_PATH_MAX]; 858 int dstuid=-1, dstgid=-1; 859 int hasspace; 860 861 d = opendir(UPDATE_COMMANDS_DIR_PREFIX); 862 if (d == NULL) { 863 goto done; 864 } 865 dfd = dirfd(d); 866 867 /* Iterate through all files in the directory, executing the 868 * file movements requested there-in. 869 */ 870 while ((de = readdir(d))) { 871 const char *name = de->d_name; 872 873 if (de->d_type == DT_DIR) { 874 continue; 875 } else { 876 subfd = openat(dfd, name, O_RDONLY); 877 if (subfd < 0) { 878 ALOGW("Unable to open update commands at %s%s\n", 879 UPDATE_COMMANDS_DIR_PREFIX, name); 880 continue; 881 } 882 883 bufp = 0; 884 bufe = 0; 885 buf[PKG_PATH_MAX] = 0; 886 srcpkg[0] = dstpkg[0] = 0; 887 while (1) { 888 bufi = bufp; 889 while (bufi < bufe && buf[bufi] != '\n') { 890 bufi++; 891 } 892 if (bufi < bufe) { 893 buf[bufi] = 0; 894 ALOGV("Processing line: %s\n", buf+bufp); 895 hasspace = 0; 896 while (bufp < bufi && isspace(buf[bufp])) { 897 hasspace = 1; 898 bufp++; 899 } 900 if (buf[bufp] == '#' || bufp == bufi) { 901 // skip comments and empty lines. 902 } else if (hasspace) { 903 if (dstpkg[0] == 0) { 904 ALOGW("Path before package line in %s%s: %s\n", 905 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 906 } else if (srcpkg[0] == 0) { 907 // Skip -- source package no longer exists. 908 } else { 909 ALOGV("Move file: %s (from %s to %s)\n", buf+bufp, srcpkg, dstpkg); 910 if (!create_move_path(srcpath, srcpkg, buf+bufp, 0) && 911 !create_move_path(dstpath, dstpkg, buf+bufp, 0)) { 912 movefileordir(srcpath, dstpath, 913 strlen(dstpath)-strlen(buf+bufp), 914 dstuid, dstgid, &s); 915 } 916 } 917 } else { 918 char* div = strchr(buf+bufp, ':'); 919 if (div == NULL) { 920 ALOGW("Bad package spec in %s%s; no ':' sep: %s\n", 921 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 922 } else { 923 *div = 0; 924 div++; 925 if (strlen(buf+bufp) < PKG_NAME_MAX) { 926 strcpy(dstpkg, buf+bufp); 927 } else { 928 srcpkg[0] = dstpkg[0] = 0; 929 ALOGW("Package name too long in %s%s: %s\n", 930 UPDATE_COMMANDS_DIR_PREFIX, name, buf+bufp); 931 } 932 if (strlen(div) < PKG_NAME_MAX) { 933 strcpy(srcpkg, div); 934 } else { 935 srcpkg[0] = dstpkg[0] = 0; 936 ALOGW("Package name too long in %s%s: %s\n", 937 UPDATE_COMMANDS_DIR_PREFIX, name, div); 938 } 939 if (srcpkg[0] != 0) { 940 if (!create_pkg_path(srcpath, srcpkg, PKG_DIR_POSTFIX, 0)) { 941 if (lstat(srcpath, &s) < 0) { 942 // Package no longer exists -- skip. 943 srcpkg[0] = 0; 944 } 945 } else { 946 srcpkg[0] = 0; 947 ALOGW("Can't create path %s in %s%s\n", 948 div, UPDATE_COMMANDS_DIR_PREFIX, name); 949 } 950 if (srcpkg[0] != 0) { 951 if (!create_pkg_path(dstpath, dstpkg, PKG_DIR_POSTFIX, 0)) { 952 if (lstat(dstpath, &s) == 0) { 953 dstuid = s.st_uid; 954 dstgid = s.st_gid; 955 } else { 956 // Destination package doesn't 957 // exist... due to original-package, 958 // this is normal, so don't be 959 // noisy about it. 960 srcpkg[0] = 0; 961 } 962 } else { 963 srcpkg[0] = 0; 964 ALOGW("Can't create path %s in %s%s\n", 965 div, UPDATE_COMMANDS_DIR_PREFIX, name); 966 } 967 } 968 ALOGV("Transfering from %s to %s: uid=%d\n", 969 srcpkg, dstpkg, dstuid); 970 } 971 } 972 } 973 bufp = bufi+1; 974 } else { 975 if (bufp == 0) { 976 if (bufp < bufe) { 977 ALOGW("Line too long in %s%s, skipping: %s\n", 978 UPDATE_COMMANDS_DIR_PREFIX, name, buf); 979 } 980 } else if (bufp < bufe) { 981 memcpy(buf, buf+bufp, bufe-bufp); 982 bufe -= bufp; 983 bufp = 0; 984 } 985 readlen = read(subfd, buf+bufe, PKG_PATH_MAX-bufe); 986 if (readlen < 0) { 987 ALOGW("Failure reading update commands in %s%s: %s\n", 988 UPDATE_COMMANDS_DIR_PREFIX, name, strerror(errno)); 989 break; 990 } else if (readlen == 0) { 991 break; 992 } 993 bufe += readlen; 994 buf[bufe] = 0; 995 ALOGV("Read buf: %s\n", buf); 996 } 997 } 998 close(subfd); 999 } 1000 } 1001 closedir(d); 1002 done: 1003 return 0; 1004 } 1005 1006 int linklib(const char* pkgname, const char* asecLibDir, int userId) 1007 { 1008 char pkgdir[PKG_PATH_MAX]; 1009 char libsymlink[PKG_PATH_MAX]; 1010 struct stat s, libStat; 1011 int rc = 0; 1012 1013 if (create_pkg_path(pkgdir, pkgname, PKG_DIR_POSTFIX, userId)) { 1014 ALOGE("cannot create package path\n"); 1015 return -1; 1016 } 1017 if (create_pkg_path(libsymlink, pkgname, PKG_LIB_POSTFIX, userId)) { 1018 ALOGE("cannot create package lib symlink origin path\n"); 1019 return -1; 1020 } 1021 1022 if (stat(pkgdir, &s) < 0) return -1; 1023 1024 if (chown(pkgdir, AID_INSTALL, AID_INSTALL) < 0) { 1025 ALOGE("failed to chown '%s': %s\n", pkgdir, strerror(errno)); 1026 return -1; 1027 } 1028 1029 if (chmod(pkgdir, 0700) < 0) { 1030 ALOGE("linklib() 1: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1031 rc = -1; 1032 goto out; 1033 } 1034 1035 if (lstat(libsymlink, &libStat) < 0) { 1036 if (errno != ENOENT) { 1037 ALOGE("couldn't stat lib dir: %s\n", strerror(errno)); 1038 rc = -1; 1039 goto out; 1040 } 1041 } else { 1042 if (S_ISDIR(libStat.st_mode)) { 1043 if (delete_dir_contents(libsymlink, 1, 0) < 0) { 1044 rc = -1; 1045 goto out; 1046 } 1047 } else if (S_ISLNK(libStat.st_mode)) { 1048 if (unlink(libsymlink) < 0) { 1049 ALOGE("couldn't unlink lib dir: %s\n", strerror(errno)); 1050 rc = -1; 1051 goto out; 1052 } 1053 } 1054 } 1055 1056 if (symlink(asecLibDir, libsymlink) < 0) { 1057 ALOGE("couldn't symlink directory '%s' -> '%s': %s\n", libsymlink, asecLibDir, 1058 strerror(errno)); 1059 rc = -errno; 1060 goto out; 1061 } 1062 1063 out: 1064 if (chmod(pkgdir, s.st_mode) < 0) { 1065 ALOGE("linklib() 2: failed to chmod '%s': %s\n", pkgdir, strerror(errno)); 1066 rc = -errno; 1067 } 1068 1069 if (chown(pkgdir, s.st_uid, s.st_gid) < 0) { 1070 ALOGE("failed to chown '%s' : %s\n", pkgdir, strerror(errno)); 1071 return -errno; 1072 } 1073 1074 return rc; 1075 } 1076
