installd.cpp revision 01ad5984dd202311a7e301c8c771a5d4b7c76136
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 /* apk_path, uid, pkgname, instruction_set, dexopt_needed, oat_dir, dexopt_flags, volume_uuid, 262 use_profiles */ 263 return dexopt(arg[0], atoi(arg[1]), arg[2], arg[3], atoi(arg[4]), 264 arg[5], dexopt_flags, parse_null(arg[7]), (atoi(arg[8]) == 0 ? false : true)); 265} 266 267static int do_mark_boot_complete(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 268{ 269 return mark_boot_complete(arg[0] /* instruction set */); 270} 271 272static int do_rm_dex(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 273{ 274 return rm_dex(arg[0], arg[1]); /* pkgname, instruction_set */ 275} 276 277static int do_free_cache(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) /* TODO int:free_size */ 278{ 279 return free_cache(parse_null(arg[0]), (int64_t)atoll(arg[1])); /* uuid, free_size */ 280} 281 282static int do_get_app_size(char **arg, char reply[REPLY_MAX]) { 283 int64_t codesize = 0; 284 int64_t datasize = 0; 285 int64_t cachesize = 0; 286 int64_t asecsize = 0; 287 int res = 0; 288 289 /* const char *uuid, const char *pkgname, userid_t userid, int flags, 290 const char *apkpath, const char *libdirpath, const char *fwdlock_apkpath, 291 const char *asecpath, const char *instruction_set */ 292 res = get_app_size(parse_null(arg[0]), arg[1], atoi(arg[2]), atoi(arg[3]), arg[4], arg[5], 293 arg[6], arg[7], arg[8], &codesize, &datasize, &cachesize, &asecsize); 294 295 /* 296 * Each int64_t can take up 22 characters printed out. Make sure it 297 * doesn't go over REPLY_MAX in the future. 298 */ 299 snprintf(reply, REPLY_MAX, "%" PRId64 " %" PRId64 " %" PRId64 " %" PRId64, 300 codesize, datasize, cachesize, asecsize); 301 return res; 302} 303 304static int do_move_complete_app(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 305 /* const char* from_uuid, const char *to_uuid, const char *package_name, 306 const char *data_app_name, appid_t appid, const char* seinfo, 307 int target_sdk_version */ 308 return move_complete_app(parse_null(arg[0]), parse_null(arg[1]), arg[2], arg[3], 309 atoi(arg[4]), arg[5], atoi(arg[6])); 310} 311 312static int do_mk_user_config(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 313{ 314 return make_user_config(atoi(arg[0])); /* userid */ 315} 316 317static int do_rm_user(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 318{ 319 return delete_user(parse_null(arg[0]), atoi(arg[1])); /* uuid, userid */ 320} 321 322static int do_linklib(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 323{ 324 return linklib(parse_null(arg[0]), arg[1], arg[2], atoi(arg[3])); 325} 326 327static int do_idmap(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 328{ 329 return idmap(arg[0], arg[1], atoi(arg[2])); 330} 331 332static int do_create_oat_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 333{ 334 /* oat_dir, instruction_set */ 335 return create_oat_dir(arg[0], arg[1]); 336} 337 338static int do_rm_package_dir(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 339{ 340 /* oat_dir */ 341 return rm_package_dir(arg[0]); 342} 343 344static int do_rm_profiles(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 345{ 346 /* package_name */ 347 return rm_profiles(arg[0]); 348} 349 350static int do_link_file(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) 351{ 352 /* relative_path, from_base, to_base */ 353 return link_file(arg[0], arg[1], arg[2]); 354} 355 356static int do_move_ab(char **arg, char reply[REPLY_MAX] ATTRIBUTE_UNUSED) { 357 // apk_path, instruction_set, oat_dir 358 return move_ab(arg[0], arg[1], arg[2]); 359} 360 361struct cmdinfo { 362 const char *name; 363 unsigned numargs; 364 int (*func)(char **arg, char reply[REPLY_MAX]); 365}; 366 367struct cmdinfo cmds[] = { 368 { "ping", 0, do_ping }, 369 370 { "create_app_data", 7, do_create_app_data }, 371 { "restorecon_app_data", 6, do_restorecon_app_data }, 372 { "migrate_app_data", 4, do_migrate_app_data }, 373 { "clear_app_data", 4, do_clear_app_data }, 374 { "destroy_app_data", 4, do_destroy_app_data }, 375 { "move_complete_app", 7, do_move_complete_app }, 376 { "get_app_size", 9, do_get_app_size }, 377 378 { "dexopt", 9, do_dexopt }, 379 { "markbootcomplete", 1, do_mark_boot_complete }, 380 { "rmdex", 2, do_rm_dex }, 381 { "freecache", 2, do_free_cache }, 382 { "linklib", 4, do_linklib }, 383 { "mkuserconfig", 1, do_mk_user_config }, 384 { "rmuser", 2, do_rm_user }, 385 { "idmap", 3, do_idmap }, 386 { "createoatdir", 2, do_create_oat_dir }, 387 { "rmpackagedir", 1, do_rm_package_dir }, 388 { "rmprofiles", 1, do_rm_profiles }, 389 { "linkfile", 3, do_link_file }, 390 { "move_ab", 3, do_move_ab }, 391}; 392 393static int readx(int s, void *_buf, int count) 394{ 395 char *buf = (char *) _buf; 396 int n = 0, r; 397 if (count < 0) return -1; 398 while (n < count) { 399 r = read(s, buf + n, count - n); 400 if (r < 0) { 401 if (errno == EINTR) continue; 402 ALOGE("read error: %s\n", strerror(errno)); 403 return -1; 404 } 405 if (r == 0) { 406 ALOGE("eof\n"); 407 return -1; /* EOF */ 408 } 409 n += r; 410 } 411 return 0; 412} 413 414static int writex(int s, const void *_buf, int count) 415{ 416 const char *buf = (const char *) _buf; 417 int n = 0, r; 418 if (count < 0) return -1; 419 while (n < count) { 420 r = write(s, buf + n, count - n); 421 if (r < 0) { 422 if (errno == EINTR) continue; 423 ALOGE("write error: %s\n", strerror(errno)); 424 return -1; 425 } 426 n += r; 427 } 428 return 0; 429} 430 431 432/* Tokenize the command buffer, locate a matching command, 433 * ensure that the required number of arguments are provided, 434 * call the function(), return the result. 435 */ 436static int execute(int s, char cmd[BUFFER_MAX]) 437{ 438 char reply[REPLY_MAX]; 439 char *arg[TOKEN_MAX+1]; 440 unsigned i; 441 unsigned n = 0; 442 unsigned short count; 443 int ret = -1; 444 445 // ALOGI("execute('%s')\n", cmd); 446 447 /* default reply is "" */ 448 reply[0] = 0; 449 450 /* n is number of args (not counting arg[0]) */ 451 arg[0] = cmd; 452 while (*cmd) { 453 if (isspace(*cmd)) { 454 *cmd++ = 0; 455 n++; 456 arg[n] = cmd; 457 if (n == TOKEN_MAX) { 458 ALOGE("too many arguments\n"); 459 goto done; 460 } 461 } 462 if (*cmd) { 463 cmd++; 464 } 465 } 466 467 for (i = 0; i < sizeof(cmds) / sizeof(cmds[0]); i++) { 468 if (!strcmp(cmds[i].name,arg[0])) { 469 if (n != cmds[i].numargs) { 470 ALOGE("%s requires %d arguments (%d given)\n", 471 cmds[i].name, cmds[i].numargs, n); 472 } else { 473 ret = cmds[i].func(arg + 1, reply); 474 } 475 goto done; 476 } 477 } 478 ALOGE("unsupported command '%s'\n", arg[0]); 479 480done: 481 if (reply[0]) { 482 n = snprintf(cmd, BUFFER_MAX, "%d %s", ret, reply); 483 } else { 484 n = snprintf(cmd, BUFFER_MAX, "%d", ret); 485 } 486 if (n > BUFFER_MAX) n = BUFFER_MAX; 487 count = n; 488 489 // ALOGI("reply: '%s'\n", cmd); 490 if (writex(s, &count, sizeof(count))) return -1; 491 if (writex(s, cmd, count)) return -1; 492 return 0; 493} 494 495bool initialize_globals() { 496 const char* data_path = getenv("ANDROID_DATA"); 497 if (data_path == nullptr) { 498 ALOGE("Could not find ANDROID_DATA"); 499 return false; 500 } 501 const char* root_path = getenv("ANDROID_ROOT"); 502 if (root_path == nullptr) { 503 ALOGE("Could not find ANDROID_ROOT"); 504 return false; 505 } 506 507 return init_globals_from_data_and_root(data_path, root_path); 508} 509 510static int initialize_directories() { 511 int res = -1; 512 513 // Read current filesystem layout version to handle upgrade paths 514 char version_path[PATH_MAX]; 515 snprintf(version_path, PATH_MAX, "%s.layout_version", android_data_dir.path); 516 517 int oldVersion; 518 if (fs_read_atomic_int(version_path, &oldVersion) == -1) { 519 oldVersion = 0; 520 } 521 int version = oldVersion; 522 523 if (version < 2) { 524 SLOGD("Assuming that device has multi-user storage layout; upgrade no longer supported"); 525 version = 2; 526 } 527 528 if (ensure_config_user_dirs(0) == -1) { 529 ALOGE("Failed to setup misc for user 0"); 530 goto fail; 531 } 532 533 if (version == 2) { 534 ALOGD("Upgrading to /data/misc/user directories"); 535 536 char misc_dir[PATH_MAX]; 537 snprintf(misc_dir, PATH_MAX, "%smisc", android_data_dir.path); 538 539 char keychain_added_dir[PATH_MAX]; 540 snprintf(keychain_added_dir, PATH_MAX, "%s/keychain/cacerts-added", misc_dir); 541 542 char keychain_removed_dir[PATH_MAX]; 543 snprintf(keychain_removed_dir, PATH_MAX, "%s/keychain/cacerts-removed", misc_dir); 544 545 DIR *dir; 546 struct dirent *dirent; 547 dir = opendir("/data/user"); 548 if (dir != NULL) { 549 while ((dirent = readdir(dir))) { 550 const char *name = dirent->d_name; 551 552 // skip "." and ".." 553 if (name[0] == '.') { 554 if (name[1] == 0) continue; 555 if ((name[1] == '.') && (name[2] == 0)) continue; 556 } 557 558 uint32_t user_id = atoi(name); 559 560 // /data/misc/user/<user_id> 561 if (ensure_config_user_dirs(user_id) == -1) { 562 goto fail; 563 } 564 565 char misc_added_dir[PATH_MAX]; 566 snprintf(misc_added_dir, PATH_MAX, "%s/user/%s/cacerts-added", misc_dir, name); 567 568 char misc_removed_dir[PATH_MAX]; 569 snprintf(misc_removed_dir, PATH_MAX, "%s/user/%s/cacerts-removed", misc_dir, name); 570 571 uid_t uid = multiuser_get_uid(user_id, AID_SYSTEM); 572 gid_t gid = uid; 573 if (access(keychain_added_dir, F_OK) == 0) { 574 if (copy_dir_files(keychain_added_dir, misc_added_dir, uid, gid) != 0) { 575 ALOGE("Some files failed to copy"); 576 } 577 } 578 if (access(keychain_removed_dir, F_OK) == 0) { 579 if (copy_dir_files(keychain_removed_dir, misc_removed_dir, uid, gid) != 0) { 580 ALOGE("Some files failed to copy"); 581 } 582 } 583 } 584 closedir(dir); 585 586 if (access(keychain_added_dir, F_OK) == 0) { 587 delete_dir_contents(keychain_added_dir, 1, 0); 588 } 589 if (access(keychain_removed_dir, F_OK) == 0) { 590 delete_dir_contents(keychain_removed_dir, 1, 0); 591 } 592 } 593 594 version = 3; 595 } 596 597 // Persist layout version if changed 598 if (version != oldVersion) { 599 if (fs_write_atomic_int(version_path, version) == -1) { 600 ALOGE("Failed to save version to %s: %s", version_path, strerror(errno)); 601 goto fail; 602 } 603 } 604 605 // Success! 606 res = 0; 607 608fail: 609 return res; 610} 611 612static int log_callback(int type, const char *fmt, ...) { 613 va_list ap; 614 int priority; 615 616 switch (type) { 617 case SELINUX_WARNING: 618 priority = ANDROID_LOG_WARN; 619 break; 620 case SELINUX_INFO: 621 priority = ANDROID_LOG_INFO; 622 break; 623 default: 624 priority = ANDROID_LOG_ERROR; 625 break; 626 } 627 va_start(ap, fmt); 628 LOG_PRI_VA(priority, "SELinux", fmt, ap); 629 va_end(ap); 630 return 0; 631} 632 633static int installd_main(const int argc ATTRIBUTE_UNUSED, char *argv[]) { 634 char buf[BUFFER_MAX]; 635 struct sockaddr addr; 636 socklen_t alen; 637 int lsocket, s; 638 int selinux_enabled = (is_selinux_enabled() > 0); 639 640 setenv("ANDROID_LOG_TAGS", "*:v", 1); 641 android::base::InitLogging(argv); 642 643 ALOGI("installd firing up\n"); 644 645 union selinux_callback cb; 646 cb.func_log = log_callback; 647 selinux_set_callback(SELINUX_CB_LOG, cb); 648 649 if (!initialize_globals()) { 650 ALOGE("Could not initialize globals; exiting.\n"); 651 exit(1); 652 } 653 654 if (initialize_directories() < 0) { 655 ALOGE("Could not create directories; exiting.\n"); 656 exit(1); 657 } 658 659 if (selinux_enabled && selinux_status_open(true) < 0) { 660 ALOGE("Could not open selinux status; exiting.\n"); 661 exit(1); 662 } 663 664 lsocket = android_get_control_socket(SOCKET_PATH); 665 if (lsocket < 0) { 666 ALOGE("Failed to get socket from environment: %s\n", strerror(errno)); 667 exit(1); 668 } 669 if (listen(lsocket, 5)) { 670 ALOGE("Listen on socket failed: %s\n", strerror(errno)); 671 exit(1); 672 } 673 fcntl(lsocket, F_SETFD, FD_CLOEXEC); 674 675 for (;;) { 676 alen = sizeof(addr); 677 s = accept(lsocket, &addr, &alen); 678 if (s < 0) { 679 ALOGE("Accept failed: %s\n", strerror(errno)); 680 continue; 681 } 682 fcntl(s, F_SETFD, FD_CLOEXEC); 683 684 ALOGI("new connection\n"); 685 for (;;) { 686 unsigned short count; 687 if (readx(s, &count, sizeof(count))) { 688 ALOGE("failed to read size\n"); 689 break; 690 } 691 if ((count < 1) || (count >= BUFFER_MAX)) { 692 ALOGE("invalid size %d\n", count); 693 break; 694 } 695 if (readx(s, buf, count)) { 696 ALOGE("failed to read command\n"); 697 break; 698 } 699 buf[count] = 0; 700 if (selinux_enabled && selinux_status_updated() > 0) { 701 selinux_android_seapp_context_reload(); 702 } 703 if (execute(s, buf)) break; 704 } 705 ALOGI("closing connection\n"); 706 close(s); 707 } 708 709 return 0; 710} 711 712} // namespace installd 713} // namespace android 714 715int main(const int argc, char *argv[]) { 716 return android::installd::installd_main(argc, argv); 717} 718