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/logging.h> 20 21 #include <sys/capability.h> 22 #include <sys/prctl.h> 23 #include <selinux/android.h> 24 #include <selinux/avc.h> 25 26 #define BUFFER_MAX 1024 /* input buffer for commands */ 27 #define TOKEN_MAX 16 /* max number of arguments in buffer */ 28 #define REPLY_MAX 256 /* largest reply allowed */ 29 30 static char* parse_null(char* arg) { 31 if (strcmp(arg, "!") == 0) { 32 return nullptr; 33 } else { 34 return arg; 35 } 36 } 37 38 static int do_ping(char **arg __unused, char reply[REPLY_MAX] __unused) 39 { 40 return 0; 41 } 42 43 static int do_install(char **arg, char reply[REPLY_MAX] __unused) 44 { 45 return install(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4]); /* uuid, pkgname, uid, gid, seinfo */ 46 } 47 48 static int do_dexopt(char **arg, char reply[REPLY_MAX] __unused) 49 { 50 /* apk_path, uid, is_public, pkgname, instruction_set, 51 * dexopt_needed, vm_safe_mode, debuggable, oat_dir */ 52 return dexopt(arg[0], atoi(arg[1]), atoi(arg[2]), arg[3], arg[4], atoi(arg[5]), 53 atoi(arg[6]), atoi(arg[7]), arg[8]); 54 } 55 56 static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] __unused) 57 { 58 return mark_boot_complete(arg[0] /* instruction set */); 59 } 60 61 static int do_move_dex(char **arg, char reply[REPLY_MAX] __unused) 62 { 63 return move_dex(arg[0], arg[1], arg[2]); /* src, dst, instruction_set */ 64 } 65 66 static int do_rm_dex(char **arg, char reply[REPLY_MAX] __unused) 67 { 68 return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */ 69 } 70 71 static int do_remove(char **arg, char reply[REPLY_MAX] __unused) 72 { 73 return uninstall(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ 74 } 75 76 static int do_rename(char **arg, char reply[REPLY_MAX] __unused) 77 { 78 return renamepkg(arg[0], arg[1]); /* oldpkgname, newpkgname */ 79 } 80 81 static int do_fixuid(char **arg, char reply[REPLY_MAX] __unused) 82 { 83 return fix_uid(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3])); /* uuid, pkgname, uid, gid */ 84 } 85 86 static int do_free_cache(char **arg, char reply[REPLY_MAX] __unused) /* TODO int:free_size */ 87 { 88 return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */ 89 } 90 91 static int do_rm_cache(char **arg, char reply[REPLY_MAX] __unused) 92 { 93 return delete_cache(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ 94 } 95 96 static int do_rm_code_cache(char **arg, char reply[REPLY_MAX] __unused) 97 { 98 return delete_code_cache(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ 99 } 100 101 static int do_get_size(char **arg, char reply[REPLY_MAX]) 102 { 103 int64_t codesize = 0; 104 int64_t datasize = 0; 105 int64_t cachesize = 0; 106 int64_t asecsize = 0; 107 int res = 0; 108 109 /* uuid, pkgdir, userid, apkpath */ 110 res = get_size(parse_null(arg[0]), arg[1], atoi(arg[2]), arg[3], arg[4], arg[5], arg[6], 111 arg[7], &codesize, &datasize, &cachesize, &asecsize); 112 113 /* 114 * Each int64_t can take up 22 characters printed out. Make sure it 115 * doesn't go over REPLY_MAX in the future. 116 */ 117 snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64, 118 codesize, datasize, cachesize, asecsize); 119 return res; 120 } 121 122 static int do_rm_user_data(char **arg, char reply[REPLY_MAX] __unused) 123 { 124 return delete_user_data(parse_null(arg[0]), arg[1], atoi(arg[2])); /* uuid, pkgname, userid */ 125 } 126 127 static int do_cp_complete_app(char **arg, char reply[REPLY_MAX] __unused) 128 { 129 // from_uuid, to_uuid, package_name, data_app_name, appid, seinfo 130 return copy_complete_app(parse_null(arg[0]), parse_null(arg[1]), arg[2], arg[3], atoi(arg[4]), arg[5]); 131 } 132 133 static int do_mk_user_data(char **arg, char reply[REPLY_MAX] __unused) 134 { 135 return make_user_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4]); 136 /* uuid, pkgname, uid, userid, seinfo */ 137 } 138 139 static int do_mk_user_config(char **arg, char reply[REPLY_MAX] __unused) 140 { 141 return make_user_config(atoi(arg[0])); /* userid */ 142 } 143 144 static int do_rm_user(char **arg, char reply[REPLY_MAX] __unused) 145 { 146 return delete_user(parse_null(arg[0]), atoi(arg[1])); /* uuid, userid */ 147 } 148 149 static int do_movefiles(char **arg __unused, char reply[REPLY_MAX] __unused) 150 { 151 return movefiles(); 152 } 153 154 static int do_linklib(char **arg, char reply[REPLY_MAX] __unused) 155 { 156 return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); 157 } 158 159 static int do_idmap(char **arg, char reply[REPLY_MAX] __unused) 160 { 161 return idmap(arg[0], arg[1], atoi(arg[2])); 162 } 163 164 static int do_restorecon_data(char **arg, char reply[REPLY_MAX] __attribute__((unused))) 165 { 166 return restorecon_data(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); 167 /* uuid, pkgName, seinfo, uid*/ 168 } 169 170 static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] __unused) 171 { 172 /* oat_dir, instruction_set */ 173 return create_oat_dir(arg[0], arg[1]); 174 } 175 176 static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] __unused) 177 { 178 /* oat_dir */ 179 return rm_package_dir(arg[0]); 180 } 181 182 static int do_link_file(char **arg, char reply[REPLY_MAX] __unused) 183 { 184 /* relative_path, from_base, to_base */ 185 return link_file(arg[0], arg[1], arg[2]); 186 } 187 188 struct cmdinfo { 189 const char *name; 190 unsigned numargs; 191 int (*func)(char **arg, char reply[REPLY_MAX]); 192 }; 193 194 struct cmdinfo cmds[] = { 195 { "ping", 0, do_ping }, 196 { "install", 5, do_install }, 197 { "dexopt", 9, do_dexopt }, 198 { "markbootcomplete", 1, do_mark_boot_complete }, 199 { "movedex", 3, do_move_dex }, 200 { "rmdex", 2, do_rm_dex }, 201 { "remove", 3, do_remove }, 202 { "rename", 2, do_rename }, 203 { "fixuid", 4, do_fixuid }, 204 { "freecache", 2, do_free_cache }, 205 { "rmcache", 3, do_rm_cache }, 206 { "rmcodecache", 3, do_rm_code_cache }, 207 { "getsize", 8, do_get_size }, 208 { "rmuserdata", 3, do_rm_user_data }, 209 { "cpcompleteapp", 6, do_cp_complete_app }, 210 { "movefiles", 0, do_movefiles }, 211 { "linklib", 4, do_linklib }, 212 { "mkuserdata", 5, do_mk_user_data }, 213 { "mkuserconfig", 1, do_mk_user_config }, 214 { "rmuser", 2, do_rm_user }, 215 { "idmap", 3, do_idmap }, 216 { "restorecondata", 4, do_restorecon_data }, 217 { "createoatdir", 2, do_create_oat_dir }, 218 { "rmpackagedir", 1, do_rm_package_dir }, 219 { "linkfile", 3, do_link_file } 220 }; 221 222 static int readx(int s, void *_buf, int count) 223 { 224 char *buf = (char *) _buf; 225 int n = 0, r; 226 if (count < 0) return -1; 227 while (n < count) { 228 r = read(s, buf + n, count - n); 229 if (r < 0) { 230 if (errno == EINTR) continue; 231 ALOGE("read error: %s\n", strerror(errno)); 232 return -1; 233 } 234 if (r == 0) { 235 ALOGE("eof\n"); 236 return -1; /* EOF */ 237 } 238 n += r; 239 } 240 return 0; 241 } 242 243 static int writex(int s, const void *_buf, int count) 244 { 245 const char *buf = (const char *) _buf; 246 int n = 0, r; 247 if (count < 0) return -1; 248 while (n < count) { 249 r = write(s, buf + n, count - n); 250 if (r < 0) { 251 if (errno == EINTR) continue; 252 ALOGE("write error: %s\n", strerror(errno)); 253 return -1; 254 } 255 n += r; 256 } 257 return 0; 258 } 259 260 261 /* Tokenize the command buffer, locate a matching command, 262 * ensure that the required number of arguments are provided, 263 * call the function(), return the result. 264 */ 265 static int execute(int s, char cmd[BUFFER_MAX]) 266 { 267 char reply[REPLY_MAX]; 268 char *arg[TOKEN_MAX+1]; 269 unsigned i; 270 unsigned n = 0; 271 unsigned short count; 272 int ret = -1; 273 274 // ALOGI("execute('%s')\n", cmd); 275 276 /* default reply is "" */ 277 reply[0] = 0; 278 279 /* n is number of args (not counting arg[0]) */ 280 arg[0] = cmd; 281 while (*cmd) { 282 if (isspace(*cmd)) { 283 *cmd++ = 0; 284 n++; 285 arg[n] = cmd; 286 if (n == TOKEN_MAX) { 287 ALOGE("too many arguments\n"); 288 goto done; 289 } 290 } 291 if (*cmd) { 292 cmd++; 293 } 294 } 295 296 for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) { 297 if (!strcmp(cmds[i].name,arg[0])) { 298 if (n != cmds[i].numargs) { 299 ALOGE("%s requires %d arguments (%d given)\n", 300 cmds[i].name, cmds[i].numargs, n); 301 } else { 302 ret = cmds[i].func(arg + 1, reply); 303 } 304 goto done; 305 } 306 } 307 ALOGE("unsupported command '%s'\n", arg[0]); 308 309 done: 310 if (reply[0]) { 311 n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply); 312 } else { 313 n = snprintf(cmd, BUFFER_MAX, "%d", ret); 314 } 315 if (n > BUFFER_MAX) n = BUFFER_MAX; 316 count = n; 317 318 // ALOGI("reply: '%s'\n", cmd); 319 if (writex(s, &count, sizeof(count))) return -1; 320 if (writex(s, cmd, count)) return -1; 321 return 0; 322 } 323 324 /** 325 * Initialize all the global variables that are used elsewhere. Returns 0 upon 326 * success and -1 on error. 327 */ 328 void free_globals() { 329 size_t i; 330 331 for (i = 0; i < android_system_dirs.count; i++) { 332 if (android_system_dirs.dirs[i].path != NULL) { 333 free(android_system_dirs.dirs[i].path); 334 } 335 } 336 337 free(android_system_dirs.dirs); 338 } 339 340 int initialize_globals() { 341 // Get the android data directory. 342 if (get_path_from_env(&android_data_dir, "ANDROID_DATA") < 0) { 343 return -1; 344 } 345 346 // Get the android app directory. 347 if (copy_and_append(&android_app_dir, &android_data_dir, APP_SUBDIR) < 0) { 348 return -1; 349 } 350 351 // Get the android protected app directory. 352 if (copy_and_append(&android_app_private_dir, &android_data_dir, PRIVATE_APP_SUBDIR) < 0) { 353 return -1; 354 } 355 356 // Get the android app native library directory. 357 if (copy_and_append(&android_app_lib_dir, &android_data_dir, APP_LIB_SUBDIR) < 0) { 358 return -1; 359 } 360 361 // Get the sd-card ASEC mount point. 362 if (get_path_from_env(&android_asec_dir, "ASEC_MOUNTPOINT") < 0) { 363 return -1; 364 } 365 366 // Get the android media directory. 367 if (copy_and_append(&android_media_dir, &android_data_dir, MEDIA_SUBDIR) < 0) { 368 return -1; 369 } 370 371 // Get the android external app directory. 372 if (get_path_from_string(&android_mnt_expand_dir, "/mnt/expand/") < 0) { 373 return -1; 374 } 375 376 // Take note of the system and vendor directories. 377 android_system_dirs.count = 4; 378 379 android_system_dirs.dirs = (dir_rec_t*) calloc(android_system_dirs.count, sizeof(dir_rec_t)); 380 if (android_system_dirs.dirs == NULL) { 381 ALOGE("Couldn't allocate array for dirs; aborting\n"); 382 return -1; 383 } 384 385 dir_rec_t android_root_dir; 386 if (get_path_from_env(&android_root_dir, "ANDROID_ROOT") < 0) { 387 ALOGE("Missing ANDROID_ROOT; aborting\n"); 388 return -1; 389 } 390 391 android_system_dirs.dirs[0].path = build_string2(android_root_dir.path, APP_SUBDIR); 392 android_system_dirs.dirs[0].len = strlen(android_system_dirs.dirs[0].path); 393 394 android_system_dirs.dirs[1].path = build_string2(android_root_dir.path, PRIV_APP_SUBDIR); 395 android_system_dirs.dirs[1].len = strlen(android_system_dirs.dirs[1].path); 396 397 android_system_dirs.dirs[2].path = strdup("/vendor/app/"); 398 android_system_dirs.dirs[2].len = strlen(android_system_dirs.dirs[2].path); 399 400 android_system_dirs.dirs[3].path = strdup("/oem/app/"); 401 android_system_dirs.dirs[3].len = strlen(android_system_dirs.dirs[3].path); 402 403 return 0; 404 } 405 406 int initialize_directories() { 407 int res = -1; 408 409 // Read current filesystem layout version to handle upgrade paths 410 char version_path[PATH_MAX]; 411 snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path); 412 413 int oldVersion; 414 if (fs_read_atomic_int(version_path, &oldVersion) == -1) { 415 oldVersion = 0; 416 } 417 int version = oldVersion; 418 419 // /data/user 420 char *user_data_dir = build_string2(android_data_dir.path, SECONDARY_USER_PREFIX); 421 // /data/data 422 char *legacy_data_dir = build_string2(android_data_dir.path, PRIMARY_USER_PREFIX); 423 // /data/user/0 424 char *primary_data_dir = build_string3(android_data_dir.path, SECONDARY_USER_PREFIX, "0"); 425 if (!user_data_dir || !legacy_data_dir || !primary_data_dir) { 426 goto fail; 427 } 428 429 // Make the /data/user directory if necessary 430 if (access(user_data_dir, R_OK) < 0) { 431 if (mkdir(user_data_dir, 0711) < 0) { 432 goto fail; 433 } 434 if (chown(user_data_dir, AID_SYSTEM, AID_SYSTEM) < 0) { 435 goto fail; 436 } 437 if (chmod(user_data_dir, 0711) < 0) { 438 goto fail; 439 } 440 } 441 // Make the /data/user/0 symlink to /data/data if necessary 442 if (access(primary_data_dir, R_OK) < 0) { 443 if (symlink(legacy_data_dir, primary_data_dir)) { 444 goto fail; 445 } 446 } 447 448 if (version == 0) { 449 // Introducing multi-user, so migrate /data/media contents into /data/media/0 450 ALOGD("Upgrading /data/media for multi-user"); 451 452 // Ensure /data/media 453 if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { 454 goto fail; 455 } 456 457 // /data/media.tmp 458 char media_tmp_dir[PATH_MAX]; 459 snprintf(media_tmp_dir, PATH_MAX, "%smedia.tmp", android_data_dir.path); 460 461 // Only copy when upgrade not already in progress 462 if (access(media_tmp_dir, F_OK) == -1) { 463 if (rename(android_media_dir.path, media_tmp_dir) == -1) { 464 ALOGE("Failed to move legacy media path: %s", strerror(errno)); 465 goto fail; 466 } 467 } 468 469 // Create /data/media again 470 if (fs_prepare_dir(android_media_dir.path, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { 471 goto fail; 472 } 473 474 if (selinux_android_restorecon(android_media_dir.path, 0)) { 475 goto fail; 476 } 477 478 // /data/media/0 479 char owner_media_dir[PATH_MAX]; 480 snprintf(owner_media_dir, PATH_MAX, "%s0", android_media_dir.path); 481 482 // Move any owner data into place 483 if (access(media_tmp_dir, F_OK) == 0) { 484 if (rename(media_tmp_dir, owner_media_dir) == -1) { 485 ALOGE("Failed to move owner media path: %s", strerror(errno)); 486 goto fail; 487 } 488 } 489 490 // Ensure media directories for any existing users 491 DIR *dir; 492 struct dirent *dirent; 493 char user_media_dir[PATH_MAX]; 494 495 dir = opendir(user_data_dir); 496 if (dir != NULL) { 497 while ((dirent = readdir(dir))) { 498 if (dirent->d_type == DT_DIR) { 499 const char *name = dirent->d_name; 500 501 // skip "." and ".." 502 if (name[0] == '.') { 503 if (name[1] == 0) continue; 504 if ((name[1] == '.') && (name[2] == 0)) continue; 505 } 506 507 // /data/media/<user_id> 508 snprintf(user_media_dir, PATH_MAX, "%s%s", android_media_dir.path, name); 509 if (fs_prepare_dir(user_media_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { 510 goto fail; 511 } 512 } 513 } 514 closedir(dir); 515 } 516 517 version = 1; 518 } 519 520 // /data/media/obb 521 char media_obb_dir[PATH_MAX]; 522 snprintf(media_obb_dir, PATH_MAX, "%sobb", android_media_dir.path); 523 524 if (version == 1) { 525 // Introducing /data/media/obb for sharing OBB across users; migrate 526 // any existing OBB files from owner. 527 ALOGD("Upgrading to shared /data/media/obb"); 528 529 // /data/media/0/Android/obb 530 char owner_obb_path[PATH_MAX]; 531 snprintf(owner_obb_path, PATH_MAX, "%s0/Android/obb", android_media_dir.path); 532 533 // Only move if target doesn't already exist 534 if (access(media_obb_dir, F_OK) != 0 && access(owner_obb_path, F_OK) == 0) { 535 if (rename(owner_obb_path, media_obb_dir) == -1) { 536 ALOGE("Failed to move OBB from owner: %s", strerror(errno)); 537 goto fail; 538 } 539 } 540 541 version = 2; 542 } 543 544 if (ensure_media_user_dirs(nullptr, 0) == -1) { 545 ALOGE("Failed to setup media for user 0"); 546 goto fail; 547 } 548 if (fs_prepare_dir(media_obb_dir, 0770, AID_MEDIA_RW, AID_MEDIA_RW) == -1) { 549 goto fail; 550 } 551 552 if (ensure_config_user_dirs(0) == -1) { 553 ALOGE("Failed to setup misc for user 0"); 554 goto fail; 555 } 556 557 if (version == 2) { 558 ALOGD("Upgrading to /data/misc/user directories"); 559 560 char misc_dir[PATH_MAX]; 561 snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path); 562 563 char keychain_added_dir[PATH_MAX]; 564 snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir); 565 566 char keychain_removed_dir[PATH_MAX]; 567 snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir); 568 569 DIR *dir; 570 struct dirent *dirent; 571 dir = opendir(user_data_dir); 572 if (dir != NULL) { 573 while ((dirent = readdir(dir))) { 574 const char *name = dirent->d_name; 575 576 // skip "." and ".." 577 if (name[0] == '.') { 578 if (name[1] == 0) continue; 579 if ((name[1] == '.') && (name[2] == 0)) continue; 580 } 581 582 uint32_t user_id = atoi(name); 583 584 // /data/misc/user/<user_id> 585 if (ensure_config_user_dirs(user_id) == -1) { 586 goto fail; 587 } 588 589 char misc_added_dir[PATH_MAX]; 590 snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name); 591 592 char misc_removed_dir[PATH_MAX]; 593 snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name); 594 595 uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM); 596 gid_t gid = uid; 597 if (access(keychain_added_dir, F_OK) == 0) { 598 if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) { 599 ALOGE("Some files failed to copy"); 600 } 601 } 602 if (access(keychain_removed_dir, F_OK) == 0) { 603 if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) { 604 ALOGE("Some files failed to copy"); 605 } 606 } 607 } 608 closedir(dir); 609 610 if (access(keychain_added_dir, F_OK) == 0) { 611 delete_dir_contents(keychain_added_dir, 1, 0); 612 } 613 if (access(keychain_removed_dir, F_OK) == 0) { 614 delete_dir_contents(keychain_removed_dir, 1, 0); 615 } 616 } 617 618 version = 3; 619 } 620 621 // Persist layout version if changed 622 if (version != oldVersion) { 623 if (fs_write_atomic_int(version_path, version) == -1) { 624 ALOGE("Failed to save version to %s: %s", version_path, strerror(errno)); 625 goto fail; 626 } 627 } 628 629 // Success! 630 res = 0; 631 632 fail: 633 free(user_data_dir); 634 free(legacy_data_dir); 635 free(primary_data_dir); 636 return res; 637 } 638 639 static int log_callback(int type, const char *fmt, ...) { 640 va_list ap; 641 int priority; 642 643 switch (type) { 644 case SELINUX_WARNING: 645 priority = ANDROID_LOG_WARN; 646 break; 647 case SELINUX_INFO: 648 priority = ANDROID_LOG_INFO; 649 break; 650 default: 651 priority = ANDROID_LOG_ERROR; 652 break; 653 } 654 va_start(ap, fmt); 655 LOG_PRI_VA(priority, "SELinux", fmt, ap); 656 va_end(ap); 657 return 0; 658 } 659 660 int main(const int argc __unused, char *argv[]) { 661 char buf[BUFFER_MAX]; 662 struct sockaddr addr; 663 socklen_t alen; 664 int lsocket, s; 665 int selinux_enabled = (is_selinux_enabled() > 0); 666 667 setenv("ANDROID_LOG_TAGS", "*:v", 1); 668 android::base::InitLogging(argv); 669 670 ALOGI("installd firing up\n"); 671 672 union selinux_callback cb; 673 cb.func_log = log_callback; 674 selinux_set_callback(SELINUX_CB_LOG, cb); 675 676 if (initialize_globals() < 0) { 677 ALOGE("Could not initialize globals; exiting.\n"); 678 exit(1); 679 } 680 681 if (initialize_directories() < 0) { 682 ALOGE("Could not create directories; exiting.\n"); 683 exit(1); 684 } 685 686 if (selinux_enabled && selinux_status_open(true) < 0) { 687 ALOGE("Could not open selinux status; exiting.\n"); 688 exit(1); 689 } 690 691 lsocket = android_get_control_socket(SOCKET_PATH); 692 if (lsocket < 0) { 693 ALOGE("Failed to get socket from environment: %s\n", strerror(errno)); 694 exit(1); 695 } 696 if (listen(lsocket, 5)) { 697 ALOGE("Listen on socket failed: %s\n", strerror(errno)); 698 exit(1); 699 } 700 fcntl(lsocket, F_SETFD, FD_CLOEXEC); 701 702 for (;;) { 703 alen = sizeof(addr); 704 s = accept(lsocket, &addr, &alen); 705 if (s < 0) { 706 ALOGE("Accept failed: %s\n", strerror(errno)); 707 continue; 708 } 709 fcntl(s, F_SETFD, FD_CLOEXEC); 710 711 ALOGI("new connection\n"); 712 for (;;) { 713 unsigned short count; 714 if (readx(s, &count, sizeof(count))) { 715 ALOGE("failed to read size\n"); 716 break; 717 } 718 if ((count < 1) || (count >= BUFFER_MAX)) { 719 ALOGE("invalid size %d\n", count); 720 break; 721 } 722 if (readx(s, buf, count)) { 723 ALOGE("failed to read command\n"); 724 break; 725 } 726 buf[count] = 0; 727 if (selinux_enabled && selinux_status_updated() > 0) { 728 selinux_android_seapp_context_reload(); 729 } 730 if (execute(s, buf)) break; 731 } 732 ALOGI("closing connection\n"); 733 close(s); 734 } 735 736 return 0; 737 } 738
