installd.cpp revision 4d0f825dd76a1972a3d081e771cde28513a1c6ff
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 <fcntl.h> 18#include <selinux/android.h> 19#include <selinux/avc.h> 20#include <sys/capability.h> 21#include <sys/fsuid.h> 22#include <sys/prctl.h> 23#include <sys/socket.h> 24#include <sys/stat.h> 25 26#include <android-base/logging.h> 27#include <cutils/fs.h> 28#include <cutils/log.h> // TODO: Move everything to base::logging. 29#include <cutils/properties.h> 30#include <cutils/sockets.h> 31#include <private/android_filesystem_config.h> 32 33#include <commands.h> 34#include <globals.h> 35#include <installd_constants.h> 36#include <installd_deps.h> // Need to fill in requirements of commands. 37#include <utils.h> 38 39#ifndef LOG_TAG 40#define LOG_TAG "installd" 41#endif 42#define SOCKET_PATH "installd" 43 44#define BUFFER_MAX 1024 /* input buffer for commands */ 45#define TOKEN_MAX 16 /* max number of arguments in buffer */ 46#define REPLY_MAX 256 /* largest reply allowed */ 47 48namespace android { 49namespace installd { 50 51// Check that installd-deps sizes match cutils sizes. 52static_assert(kPropertyKeyMax == PROPERTY_KEY_MAX, "Size mismatch."); 53static_assert(kPropertyValueMax == PROPERTY_VALUE_MAX, "Size mismatch."); 54 55//////////////////////// 56// Plug-in functions. // 57//////////////////////// 58 59int get_property(const char *key, char *value, const char *default_value) { 60 return property_get(key, value, default_value); 61} 62 63// Compute the output path of 64bool calculate_oat_file_path(char path[PKG_PATH_MAX], 65 const char *oat_dir, 66 const char *apk_path, 67 const char *instruction_set) { 68 char *file_name_start; 69 char *file_name_end; 70 71 file_name_start = strrchr(apk_path, '/'); 72 if (file_name_start == NULL) { 73 ALOGE("apk_path '%s' has no '/'s in it\n", apk_path); 74 return false; 75 } 76 file_name_end = strrchr(apk_path, '.'); 77 if (file_name_end < file_name_start) { 78 ALOGE("apk_path '%s' has no extension\n", apk_path); 79 return false; 80 } 81 82 // Calculate file_name 83 int file_name_len = file_name_end - file_name_start - 1; 84 char file_name[file_name_len + 1]; 85 memcpy(file_name, file_name_start + 1, file_name_len); 86 file_name[file_name_len] = '\0'; 87 88 // <apk_parent_dir>/oat/<isa>/<file_name>.odex 89 snprintf(path, PKG_PATH_MAX, "%s/%s/%s.odex", oat_dir, instruction_set, file_name); 90 return true; 91} 92 93/* 94 * Computes the odex file for the given apk_path and instruction_set. 95 * /system/framework/whatever.jar -> /system/framework/oat/<isa>/whatever.odex 96 * 97 * Returns false if it failed to determine the odex file path. 98 */ 99bool calculate_odex_file_path(char path[PKG_PATH_MAX], 100 const char *apk_path, 101 const char *instruction_set) { 102 if (strlen(apk_path) + strlen("oat/") + strlen(instruction_set) 103 + strlen("/") + strlen("odex") + 1 > PKG_PATH_MAX) { 104 ALOGE("apk_path '%s' may be too long to form odex file path.\n", apk_path); 105 return false; 106 } 107 108 strcpy(path, apk_path); 109 char *end = strrchr(path, '/'); 110 if (end == NULL) { 111 ALOGE("apk_path '%s' has no '/'s in it?!\n", apk_path); 112 return false; 113 } 114 const char *apk_end = apk_path + (end - path); // strrchr(apk_path, '/'); 115 116 strcpy(end + 1, "oat/"); // path = /system/framework/oat/\0 117 strcat(path, instruction_set); // path = /system/framework/oat/<isa>\0 118 strcat(path, apk_end); // path = /system/framework/oat/<isa>/whatever.jar\0 119 end = strrchr(path, '.'); 120 if (end == NULL) { 121 ALOGE("apk_path '%s' has no extension.\n", apk_path); 122 return false; 123 } 124 strcpy(end + 1, "odex"); 125 return true; 126} 127 128bool create_cache_path(char path[PKG_PATH_MAX], 129 const char *src, 130 const char *instruction_set) { 131 /* demand that we are an absolute path */ 132 if ((src == nullptr) || (src[0] != '/') || strstr(src,"..")) { 133 return false; 134 } 135 136 size_t srclen = strlen(src); 137 138 if (srclen > PKG_PATH_MAX) { // XXX: PKG_NAME_MAX? 139 return false; 140 } 141 142 size_t dstlen = 143 android_data_dir.len + 144 strlen(DALVIK_CACHE) + 145 1 + 146 strlen(instruction_set) + 147 srclen + 148 strlen(DALVIK_CACHE_POSTFIX) + 2; 149 150 if (dstlen > PKG_PATH_MAX) { 151 return false; 152 } 153 154 sprintf(path,"%s%s/%s/%s%s", 155 android_data_dir.path, 156 DALVIK_CACHE, 157 instruction_set, 158 src + 1, /* skip the leading / */ 159 DALVIK_CACHE_POSTFIX); 160 161 char* tmp = 162 path + 163 android_data_dir.len + 164 strlen(DALVIK_CACHE) + 165 1 + 166 strlen(instruction_set) + 1; 167 168 for(; *tmp; tmp++) { 169 if (*tmp == '/') { 170 *tmp = '@'; 171 } 172 } 173 174 return true; 175} 176 177 178static char* parse_null(char* arg) { 179 if (strcmp(arg, "!") == 0) { 180 return nullptr; 181 } else { 182 return arg; 183 } 184} 185 186static int do_ping(char **arg ATTRIBUTE_UNUSED, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 187{ 188 return 0; 189} 190 191static int do_create_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 192 /* const char *uuid, const char *pkgname, userid_t userid, int flags, 193 appid_t appid, const char* seinfo, int target_sdk_version */ 194 return create_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), 195 atoi(arg[4]), arg[5], atoi(arg[6])); 196} 197 198static int do_restorecon_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 199 /* const char* uuid, const char* pkgName, userid_t userid, int flags, 200 appid_t appid, const char* seinfo */ 201 return restorecon_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), atoi(arg[4]), arg[5]); 202} 203 204static int do_migrate_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 205 /* const char *uuid, const char *pkgname, userid_t userid, int flags */ 206 return migrate_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3])); 207} 208 209static int do_clear_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 210 /* const char *uuid, const char *pkgname, userid_t userid, int flags */ 211 return clear_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3])); 212} 213 214static int do_destroy_app_data(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 215 /* const char *uuid, const char *pkgname, userid_t userid, int flags */ 216 return destroy_app_data(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3])); 217} 218 219// We use otapreopt_chroot to get into the chroot. 220static constexpr const char* kOtaPreopt = "/system/bin/otapreopt_chroot"; 221 222static int do_ota_dexopt(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 223 // Time to fork and run otapreopt. 224 225 // Check that the tool exists. 226 struct stat s; 227 if (stat(kOtaPreopt, &s) != 0) { 228 LOG(ERROR) << "Otapreopt chroot tool not found."; 229 return -1; 230 } 231 232 pid_t pid = fork(); 233 if (pid == 0) { 234 const char* argv[1 + 9 + 1]; 235 argv[0] = kOtaPreopt; 236 for (size_t i = 1; i <= 9; ++i) { 237 argv[i] = arg[i - 1]; 238 } 239 argv[10] = nullptr; 240 241 execv(argv[0], (char * const *)argv); 242 PLOG(ERROR) << "execv(OTAPREOPT_CHROOT) failed"; 243 exit(99); 244 } else { 245 int res = wait_child(pid); 246 if (res == 0) { 247 ALOGV("DexInv: --- END OTAPREOPT (success) ---\n"); 248 } else { 249 ALOGE("DexInv: --- END OTAPREOPT --- status=0x%04x, process failed\n", res); 250 } 251 return res; 252 } 253} 254 255static int do_dexopt(char **arg, char reply[REPLY_MAX]) 256{ 257 int dexopt_flags = atoi(arg[6]); 258 if ((dexopt_flags & DEXOPT_OTA) != 0) { 259 return do_ota_dexopt(arg, reply); 260 } 261 return dexopt(arg[0], // apk_path 262 atoi(arg[1]), // uid 263 arg[2], // pkgname 264 arg[3], // instruction_set 265 atoi(arg[4]), // dexopt_needed 266 arg[5], // oat_dir 267 dexopt_flags, 268 arg[7], // compiler_filter 269 parse_null(arg[8])); // volume_uuid 270} 271 272static int do_merge_profiles(char **arg, char reply[REPLY_MAX]) 273{ 274 uid_t uid = static_cast<uid_t>(atoi(arg[0])); 275 const char* pkgname = arg[1]; 276 if (merge_profiles(uid, pkgname)) { 277 strncpy(reply, "true", REPLY_MAX); 278 } else { 279 strncpy(reply, "false", REPLY_MAX); 280 } 281 return 0; 282} 283 284static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 285{ 286 return mark_boot_complete(arg[0] /* instruction set */); 287} 288 289static int do_rm_dex(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 290{ 291 return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */ 292} 293 294static int do_free_cache(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) /* TODO int:free_size */ 295{ 296 return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */ 297} 298 299static int do_get_app_size(char **arg, char reply[REPLY_MAX]) { 300 int64_t codesize = 0; 301 int64_t datasize = 0; 302 int64_t cachesize = 0; 303 int64_t asecsize = 0; 304 int res = 0; 305 306 /* const char *uuid, const char *pkgname, userid_t userid, int flags, 307 const char *apkpath, const char *libdirpath, const char *fwdlock_apkpath, 308 const char *asecpath, const char *instruction_set */ 309 res = get_app_size(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4], arg[5], 310 arg[6], arg[7], arg[8], &codesize, &datasize, &cachesize, &asecsize); 311 312 /* 313 * Each int64_t can take up 22 characters printed out. Make sure it 314 * doesn't go over REPLY_MAX in the future. 315 */ 316 snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64, 317 codesize, datasize, cachesize, asecsize); 318 return res; 319} 320 321static int do_move_complete_app(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 322 /* const char* from_uuid, const char *to_uuid, const char *package_name, 323 const char *data_app_name, appid_t appid, const char* seinfo, 324 int target_sdk_version */ 325 return move_complete_app(parse_null(arg[0]), parse_null(arg[1]), arg[2], arg[3], 326 atoi(arg[4]), arg[5], atoi(arg[6])); 327} 328 329static int do_mk_user_config(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 330{ 331 return make_user_config(atoi(arg[0])); /* userid */ 332} 333 334static int do_rm_user(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 335{ 336 return delete_user(parse_null(arg[0]), atoi(arg[1])); /* uuid, userid */ 337} 338 339static int do_linklib(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 340{ 341 return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); 342} 343 344static int do_idmap(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 345{ 346 return idmap(arg[0], arg[1], atoi(arg[2])); 347} 348 349static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 350{ 351 /* oat_dir, instruction_set */ 352 return create_oat_dir(arg[0], arg[1]); 353} 354 355static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 356{ 357 /* oat_dir */ 358 return rm_package_dir(arg[0]); 359} 360 361static int do_rm_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 362{ 363 /* package_name */ 364 return rm_profiles(arg[0]); 365} 366 367static int do_link_file(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 368{ 369 /* relative_path, from_base, to_base */ 370 return link_file(arg[0], arg[1], arg[2]); 371} 372 373static int do_move_ab(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 374 // apk_path, instruction_set, oat_dir 375 return move_ab(arg[0], arg[1], arg[2]); 376} 377 378struct cmdinfo { 379 const char *name; 380 unsigned numargs; 381 int (*func)(char **arg, char reply[REPLY_MAX]); 382}; 383 384struct cmdinfo cmds[] = { 385 { "ping", 0, do_ping }, 386 387 { "create_app_data", 7, do_create_app_data }, 388 { "restorecon_app_data", 6, do_restorecon_app_data }, 389 { "migrate_app_data", 4, do_migrate_app_data }, 390 { "clear_app_data", 4, do_clear_app_data }, 391 { "destroy_app_data", 4, do_destroy_app_data }, 392 { "move_complete_app", 7, do_move_complete_app }, 393 { "get_app_size", 9, do_get_app_size }, 394 395 { "dexopt", 9, do_dexopt }, 396 { "markbootcomplete", 1, do_mark_boot_complete }, 397 { "rmdex", 2, do_rm_dex }, 398 { "freecache", 2, do_free_cache }, 399 { "linklib", 4, do_linklib }, 400 { "mkuserconfig", 1, do_mk_user_config }, 401 { "rmuser", 2, do_rm_user }, 402 { "idmap", 3, do_idmap }, 403 { "createoatdir", 2, do_create_oat_dir }, 404 { "rmpackagedir", 1, do_rm_package_dir }, 405 { "rmprofiles", 1, do_rm_profiles }, 406 { "linkfile", 3, do_link_file }, 407 { "move_ab", 3, do_move_ab }, 408 { "merge_profiles", 2, do_merge_profiles }, 409}; 410 411static int readx(int s, void *_buf, int count) 412{ 413 char *buf = (char *) _buf; 414 int n = 0, r; 415 if (count < 0) return -1; 416 while (n < count) { 417 r = read(s, buf + n, count - n); 418 if (r < 0) { 419 if (errno == EINTR) continue; 420 ALOGE("read error: %s\n", strerror(errno)); 421 return -1; 422 } 423 if (r == 0) { 424 ALOGE("eof\n"); 425 return -1; /* EOF */ 426 } 427 n += r; 428 } 429 return 0; 430} 431 432static int writex(int s, const void *_buf, int count) 433{ 434 const char *buf = (const char *) _buf; 435 int n = 0, r; 436 if (count < 0) return -1; 437 while (n < count) { 438 r = write(s, buf + n, count - n); 439 if (r < 0) { 440 if (errno == EINTR) continue; 441 ALOGE("write error: %s\n", strerror(errno)); 442 return -1; 443 } 444 n += r; 445 } 446 return 0; 447} 448 449 450/* Tokenize the command buffer, locate a matching command, 451 * ensure that the required number of arguments are provided, 452 * call the function(), return the result. 453 */ 454static int execute(int s, char cmd[BUFFER_MAX]) 455{ 456 char reply[REPLY_MAX]; 457 char *arg[TOKEN_MAX+1]; 458 unsigned i; 459 unsigned n = 0; 460 unsigned short count; 461 int ret = -1; 462 463 // ALOGI("execute('%s')\n", cmd); 464 465 /* default reply is "" */ 466 reply[0] = 0; 467 468 /* n is number of args (not counting arg[0]) */ 469 arg[0] = cmd; 470 while (*cmd) { 471 if (isspace(*cmd)) { 472 *cmd++ = 0; 473 n++; 474 arg[n] = cmd; 475 if (n == TOKEN_MAX) { 476 ALOGE("too many arguments\n"); 477 goto done; 478 } 479 } 480 if (*cmd) { 481 cmd++; 482 } 483 } 484 485 for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) { 486 if (!strcmp(cmds[i].name,arg[0])) { 487 if (n != cmds[i].numargs) { 488 ALOGE("%s requires %d arguments (%d given)\n", 489 cmds[i].name, cmds[i].numargs, n); 490 } else { 491 ret = cmds[i].func(arg + 1, reply); 492 } 493 goto done; 494 } 495 } 496 ALOGE("unsupported command '%s'\n", arg[0]); 497 498done: 499 if (reply[0]) { 500 n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply); 501 } else { 502 n = snprintf(cmd, BUFFER_MAX, "%d", ret); 503 } 504 if (n > BUFFER_MAX) n = BUFFER_MAX; 505 count = n; 506 507 // ALOGI("reply: '%s'\n", cmd); 508 if (writex(s, &count, sizeof(count))) return -1; 509 if (writex(s, cmd, count)) return -1; 510 return 0; 511} 512 513bool initialize_globals() { 514 const char* data_path = getenv("ANDROID_DATA"); 515 if (data_path == nullptr) { 516 ALOGE("Could not find ANDROID_DATA"); 517 return false; 518 } 519 const char* root_path = getenv("ANDROID_ROOT"); 520 if (root_path == nullptr) { 521 ALOGE("Could not find ANDROID_ROOT"); 522 return false; 523 } 524 525 return init_globals_from_data_and_root(data_path, root_path); 526} 527 528static int initialize_directories() { 529 int res = -1; 530 531 // Read current filesystem layout version to handle upgrade paths 532 char version_path[PATH_MAX]; 533 snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path); 534 535 int oldVersion; 536 if (fs_read_atomic_int(version_path, &oldVersion) == -1) { 537 oldVersion = 0; 538 } 539 int version = oldVersion; 540 541 if (version < 2) { 542 SLOGD("Assuming that device has multi-user storage layout; upgrade no longer supported"); 543 version = 2; 544 } 545 546 if (ensure_config_user_dirs(0) == -1) { 547 ALOGE("Failed to setup misc for user 0"); 548 goto fail; 549 } 550 551 if (version == 2) { 552 ALOGD("Upgrading to /data/misc/user directories"); 553 554 char misc_dir[PATH_MAX]; 555 snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path); 556 557 char keychain_added_dir[PATH_MAX]; 558 snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir); 559 560 char keychain_removed_dir[PATH_MAX]; 561 snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir); 562 563 DIR *dir; 564 struct dirent *dirent; 565 dir = opendir("/data/user"); 566 if (dir != NULL) { 567 while ((dirent = readdir(dir))) { 568 const char *name = dirent->d_name; 569 570 // skip "." and ".." 571 if (name[0] == '.') { 572 if (name[1] == 0) continue; 573 if ((name[1] == '.') && (name[2] == 0)) continue; 574 } 575 576 uint32_t user_id = atoi(name); 577 578 // /data/misc/user/<user_id> 579 if (ensure_config_user_dirs(user_id) == -1) { 580 goto fail; 581 } 582 583 char misc_added_dir[PATH_MAX]; 584 snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name); 585 586 char misc_removed_dir[PATH_MAX]; 587 snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name); 588 589 uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM); 590 gid_t gid = uid; 591 if (access(keychain_added_dir, F_OK) == 0) { 592 if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) { 593 ALOGE("Some files failed to copy"); 594 } 595 } 596 if (access(keychain_removed_dir, F_OK) == 0) { 597 if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) { 598 ALOGE("Some files failed to copy"); 599 } 600 } 601 } 602 closedir(dir); 603 604 if (access(keychain_added_dir, F_OK) == 0) { 605 delete_dir_contents(keychain_added_dir, 1, 0); 606 } 607 if (access(keychain_removed_dir, F_OK) == 0) { 608 delete_dir_contents(keychain_removed_dir, 1, 0); 609 } 610 } 611 612 version = 3; 613 } 614 615 // Persist layout version if changed 616 if (version != oldVersion) { 617 if (fs_write_atomic_int(version_path, version) == -1) { 618 ALOGE("Failed to save version to %s: %s", version_path, strerror(errno)); 619 goto fail; 620 } 621 } 622 623 // Success! 624 res = 0; 625 626fail: 627 return res; 628} 629 630static int log_callback(int type, const char *fmt, ...) { 631 va_list ap; 632 int priority; 633 634 switch (type) { 635 case SELINUX_WARNING: 636 priority = ANDROID_LOG_WARN; 637 break; 638 case SELINUX_INFO: 639 priority = ANDROID_LOG_INFO; 640 break; 641 default: 642 priority = ANDROID_LOG_ERROR; 643 break; 644 } 645 va_start(ap, fmt); 646 LOG_PRI_VA(priority, "SELinux", fmt, ap); 647 va_end(ap); 648 return 0; 649} 650 651static int installd_main(const int argc ATTRIBUTE_UNUSED, char *argv[]) { 652 char buf[BUFFER_MAX]; 653 struct sockaddr addr; 654 socklen_t alen; 655 int lsocket, s; 656 int selinux_enabled = (is_selinux_enabled() > 0); 657 658 setenv("ANDROID_LOG_TAGS", "*:v", 1); 659 android::base::InitLogging(argv); 660 661 ALOGI("installd firing up\n"); 662 663 union selinux_callback cb; 664 cb.func_log = log_callback; 665 selinux_set_callback(SELINUX_CB_LOG, cb); 666 667 if (!initialize_globals()) { 668 ALOGE("Could not initialize globals; exiting.\n"); 669 exit(1); 670 } 671 672 if (initialize_directories() < 0) { 673 ALOGE("Could not create directories; exiting.\n"); 674 exit(1); 675 } 676 677 if (selinux_enabled && selinux_status_open(true) < 0) { 678 ALOGE("Could not open selinux status; exiting.\n"); 679 exit(1); 680 } 681 682 lsocket = android_get_control_socket(SOCKET_PATH); 683 if (lsocket < 0) { 684 ALOGE("Failed to get socket from environment: %s\n", strerror(errno)); 685 exit(1); 686 } 687 if (listen(lsocket, 5)) { 688 ALOGE("Listen on socket failed: %s\n", strerror(errno)); 689 exit(1); 690 } 691 fcntl(lsocket, F_SETFD, FD_CLOEXEC); 692 693 for (;;) { 694 alen = sizeof(addr); 695 s = accept(lsocket, &addr, &alen); 696 if (s < 0) { 697 ALOGE("Accept failed: %s\n", strerror(errno)); 698 continue; 699 } 700 fcntl(s, F_SETFD, FD_CLOEXEC); 701 702 ALOGI("new connection\n"); 703 for (;;) { 704 unsigned short count; 705 if (readx(s, &count, sizeof(count))) { 706 ALOGE("failed to read size\n"); 707 break; 708 } 709 if ((count < 1) || (count >= BUFFER_MAX)) { 710 ALOGE("invalid size %d\n", count); 711 break; 712 } 713 if (readx(s, buf, count)) { 714 ALOGE("failed to read command\n"); 715 break; 716 } 717 buf[count] = 0; 718 if (selinux_enabled && selinux_status_updated() > 0) { 719 selinux_android_seapp_context_reload(); 720 } 721 if (execute(s, buf)) break; 722 } 723 ALOGI("closing connection\n"); 724 close(s); 725 } 726 727 return 0; 728} 729 730} // namespace installd 731} // namespace android 732 733int main(const int argc, char *argv[]) { 734 return android::installd::installd_main(argc, argv); 735} 736