1 /* 2 * Copyright (C) 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 <stdio.h> 18 #include <stdlib.h> 19 #include <string.h> 20 #include <unistd.h> 21 #include <fcntl.h> 22 #include <ctype.h> 23 #include <signal.h> 24 #include <sys/wait.h> 25 #include <sys/mount.h> 26 #include <sys/stat.h> 27 #include <sys/poll.h> 28 #include <errno.h> 29 #include <stdarg.h> 30 #include <mtd/mtd-user.h> 31 #include <sys/types.h> 32 #include <sys/socket.h> 33 #include <sys/un.h> 34 35 #include <selinux/selinux.h> 36 #include <selinux/label.h> 37 #include <selinux/android.h> 38 39 #include <libgen.h> 40 41 #include <cutils/list.h> 42 #include <cutils/sockets.h> 43 #include <cutils/iosched_policy.h> 44 #include <private/android_filesystem_config.h> 45 #include <termios.h> 46 47 #include <sys/system_properties.h> 48 49 #include "devices.h" 50 #include "init.h" 51 #include "log.h" 52 #include "property_service.h" 53 #include "bootchart.h" 54 #include "signal_handler.h" 55 #include "keychords.h" 56 #include "init_parser.h" 57 #include "util.h" 58 #include "ueventd.h" 59 #include "watchdogd.h" 60 61 struct selabel_handle *sehandle; 62 struct selabel_handle *sehandle_prop; 63 64 static int property_triggers_enabled = 0; 65 66 #if BOOTCHART 67 static int bootchart_count; 68 #endif 69 70 static char console[32]; 71 static char bootmode[32]; 72 static char hardware[32]; 73 static unsigned revision = 0; 74 static char qemu[32]; 75 76 static int selinux_enabled = 1; 77 78 static struct action *cur_action = NULL; 79 static struct command *cur_command = NULL; 80 static struct listnode *command_queue = NULL; 81 82 void notify_service_state(const char *name, const char *state) 83 { 84 char pname[PROP_NAME_MAX]; 85 int len = strlen(name); 86 if ((len + 10) > PROP_NAME_MAX) 87 return; 88 snprintf(pname, sizeof(pname), "init.svc.%s", name); 89 property_set(pname, state); 90 } 91 92 static int have_console; 93 static char *console_name = "/dev/console"; 94 static time_t process_needs_restart; 95 96 static const char *ENV[32]; 97 98 /* add_environment - add "key=value" to the current environment */ 99 int add_environment(const char *key, const char *val) 100 { 101 int n; 102 103 for (n = 0; n < 31; n++) { 104 if (!ENV[n]) { 105 size_t len = strlen(key) + strlen(val) + 2; 106 char *entry = malloc(len); 107 snprintf(entry, len, "%s=%s", key, val); 108 ENV[n] = entry; 109 return 0; 110 } 111 } 112 113 return 1; 114 } 115 116 static void zap_stdio(void) 117 { 118 int fd; 119 fd = open("/dev/null", O_RDWR); 120 dup2(fd, 0); 121 dup2(fd, 1); 122 dup2(fd, 2); 123 close(fd); 124 } 125 126 static void open_console() 127 { 128 int fd; 129 if ((fd = open(console_name, O_RDWR)) < 0) { 130 fd = open("/dev/null", O_RDWR); 131 } 132 ioctl(fd, TIOCSCTTY, 0); 133 dup2(fd, 0); 134 dup2(fd, 1); 135 dup2(fd, 2); 136 close(fd); 137 } 138 139 static void publish_socket(const char *name, int fd) 140 { 141 char key[64] = ANDROID_SOCKET_ENV_PREFIX; 142 char val[64]; 143 144 strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 145 name, 146 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 147 snprintf(val, sizeof(val), "%d", fd); 148 add_environment(key, val); 149 150 /* make sure we don't close-on-exec */ 151 fcntl(fd, F_SETFD, 0); 152 } 153 154 void service_start(struct service *svc, const char *dynamic_args) 155 { 156 struct stat s; 157 pid_t pid; 158 int needs_console; 159 int n; 160 char *scon = NULL; 161 int rc; 162 163 /* starting a service removes it from the disabled or reset 164 * state and immediately takes it out of the restarting 165 * state if it was in there 166 */ 167 svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET)); 168 svc->time_started = 0; 169 170 /* running processes require no additional work -- if 171 * they're in the process of exiting, we've ensured 172 * that they will immediately restart on exit, unless 173 * they are ONESHOT 174 */ 175 if (svc->flags & SVC_RUNNING) { 176 return; 177 } 178 179 needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0; 180 if (needs_console && (!have_console)) { 181 ERROR("service '%s' requires console\n", svc->name); 182 svc->flags |= SVC_DISABLED; 183 return; 184 } 185 186 if (stat(svc->args[0], &s) != 0) { 187 ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name); 188 svc->flags |= SVC_DISABLED; 189 return; 190 } 191 192 if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) { 193 ERROR("service '%s' must be one-shot to use dynamic args, disabling\n", 194 svc->args[0]); 195 svc->flags |= SVC_DISABLED; 196 return; 197 } 198 199 if (is_selinux_enabled() > 0) { 200 if (svc->seclabel) { 201 scon = strdup(svc->seclabel); 202 if (!scon) { 203 ERROR("Out of memory while starting '%s'\n", svc->name); 204 return; 205 } 206 } else { 207 char *mycon = NULL, *fcon = NULL; 208 209 INFO("computing context for service '%s'\n", svc->args[0]); 210 rc = getcon(&mycon); 211 if (rc < 0) { 212 ERROR("could not get context while starting '%s'\n", svc->name); 213 return; 214 } 215 216 rc = getfilecon(svc->args[0], &fcon); 217 if (rc < 0) { 218 ERROR("could not get context while starting '%s'\n", svc->name); 219 freecon(mycon); 220 return; 221 } 222 223 rc = security_compute_create(mycon, fcon, string_to_security_class("process"), &scon); 224 freecon(mycon); 225 freecon(fcon); 226 if (rc < 0) { 227 ERROR("could not get context while starting '%s'\n", svc->name); 228 return; 229 } 230 } 231 } 232 233 NOTICE("starting '%s'\n", svc->name); 234 235 pid = fork(); 236 237 if (pid == 0) { 238 struct socketinfo *si; 239 struct svcenvinfo *ei; 240 char tmp[32]; 241 int fd, sz; 242 243 umask(077); 244 if (properties_inited()) { 245 get_property_workspace(&fd, &sz); 246 sprintf(tmp, "%d,%d", dup(fd), sz); 247 add_environment("ANDROID_PROPERTY_WORKSPACE", tmp); 248 } 249 250 for (ei = svc->envvars; ei; ei = ei->next) 251 add_environment(ei->name, ei->value); 252 253 setsockcreatecon(scon); 254 255 for (si = svc->sockets; si; si = si->next) { 256 int socket_type = ( 257 !strcmp(si->type, "stream") ? SOCK_STREAM : 258 (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET)); 259 int s = create_socket(si->name, socket_type, 260 si->perm, si->uid, si->gid); 261 if (s >= 0) { 262 publish_socket(si->name, s); 263 } 264 } 265 266 freecon(scon); 267 scon = NULL; 268 setsockcreatecon(NULL); 269 270 if (svc->ioprio_class != IoSchedClass_NONE) { 271 if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) { 272 ERROR("Failed to set pid %d ioprio = %d,%d: %s\n", 273 getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno)); 274 } 275 } 276 277 if (needs_console) { 278 setsid(); 279 open_console(); 280 } else { 281 zap_stdio(); 282 } 283 284 #if 0 285 for (n = 0; svc->args[n]; n++) { 286 INFO("args[%d] = '%s'\n", n, svc->args[n]); 287 } 288 for (n = 0; ENV[n]; n++) { 289 INFO("env[%d] = '%s'\n", n, ENV[n]); 290 } 291 #endif 292 293 setpgid(0, getpid()); 294 295 /* as requested, set our gid, supplemental gids, and uid */ 296 if (svc->gid) { 297 if (setgid(svc->gid) != 0) { 298 ERROR("setgid failed: %s\n", strerror(errno)); 299 _exit(127); 300 } 301 } 302 if (svc->nr_supp_gids) { 303 if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) { 304 ERROR("setgroups failed: %s\n", strerror(errno)); 305 _exit(127); 306 } 307 } 308 if (svc->uid) { 309 if (setuid(svc->uid) != 0) { 310 ERROR("setuid failed: %s\n", strerror(errno)); 311 _exit(127); 312 } 313 } 314 if (svc->seclabel) { 315 if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) { 316 ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno)); 317 _exit(127); 318 } 319 } 320 321 if (!dynamic_args) { 322 if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) { 323 ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno)); 324 } 325 } else { 326 char *arg_ptrs[INIT_PARSER_MAXARGS+1]; 327 int arg_idx = svc->nargs; 328 char *tmp = strdup(dynamic_args); 329 char *next = tmp; 330 char *bword; 331 332 /* Copy the static arguments */ 333 memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *))); 334 335 while((bword = strsep(&next, " "))) { 336 arg_ptrs[arg_idx++] = bword; 337 if (arg_idx == INIT_PARSER_MAXARGS) 338 break; 339 } 340 arg_ptrs[arg_idx] = '\0'; 341 execve(svc->args[0], (char**) arg_ptrs, (char**) ENV); 342 } 343 _exit(127); 344 } 345 346 freecon(scon); 347 348 if (pid < 0) { 349 ERROR("failed to start '%s'\n", svc->name); 350 svc->pid = 0; 351 return; 352 } 353 354 svc->time_started = gettime(); 355 svc->pid = pid; 356 svc->flags |= SVC_RUNNING; 357 358 if (properties_inited()) 359 notify_service_state(svc->name, "running"); 360 } 361 362 /* The how field should be either SVC_DISABLED or SVC_RESET */ 363 static void service_stop_or_reset(struct service *svc, int how) 364 { 365 /* we are no longer running, nor should we 366 * attempt to restart 367 */ 368 svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING)); 369 370 if ((how != SVC_DISABLED) && (how != SVC_RESET)) { 371 /* Hrm, an illegal flag. Default to SVC_DISABLED */ 372 how = SVC_DISABLED; 373 } 374 /* if the service has not yet started, prevent 375 * it from auto-starting with its class 376 */ 377 if (how == SVC_RESET) { 378 svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET; 379 } else { 380 svc->flags |= how; 381 } 382 383 if (svc->pid) { 384 NOTICE("service '%s' is being killed\n", svc->name); 385 kill(-svc->pid, SIGKILL); 386 notify_service_state(svc->name, "stopping"); 387 } else { 388 notify_service_state(svc->name, "stopped"); 389 } 390 } 391 392 void service_reset(struct service *svc) 393 { 394 service_stop_or_reset(svc, SVC_RESET); 395 } 396 397 void service_stop(struct service *svc) 398 { 399 service_stop_or_reset(svc, SVC_DISABLED); 400 } 401 402 void property_changed(const char *name, const char *value) 403 { 404 if (property_triggers_enabled) 405 queue_property_triggers(name, value); 406 } 407 408 static void restart_service_if_needed(struct service *svc) 409 { 410 time_t next_start_time = svc->time_started + 5; 411 412 if (next_start_time <= gettime()) { 413 svc->flags &= (~SVC_RESTARTING); 414 service_start(svc, NULL); 415 return; 416 } 417 418 if ((next_start_time < process_needs_restart) || 419 (process_needs_restart == 0)) { 420 process_needs_restart = next_start_time; 421 } 422 } 423 424 static void restart_processes() 425 { 426 process_needs_restart = 0; 427 service_for_each_flags(SVC_RESTARTING, 428 restart_service_if_needed); 429 } 430 431 static void msg_start(const char *name) 432 { 433 struct service *svc; 434 char *tmp = NULL; 435 char *args = NULL; 436 437 if (!strchr(name, ':')) 438 svc = service_find_by_name(name); 439 else { 440 tmp = strdup(name); 441 args = strchr(tmp, ':'); 442 *args = '\0'; 443 args++; 444 445 svc = service_find_by_name(tmp); 446 } 447 448 if (svc) { 449 service_start(svc, args); 450 } else { 451 ERROR("no such service '%s'\n", name); 452 } 453 if (tmp) 454 free(tmp); 455 } 456 457 static void msg_stop(const char *name) 458 { 459 struct service *svc = service_find_by_name(name); 460 461 if (svc) { 462 service_stop(svc); 463 } else { 464 ERROR("no such service '%s'\n", name); 465 } 466 } 467 468 void handle_control_message(const char *msg, const char *arg) 469 { 470 if (!strcmp(msg,"start")) { 471 msg_start(arg); 472 } else if (!strcmp(msg,"stop")) { 473 msg_stop(arg); 474 } else if (!strcmp(msg,"restart")) { 475 msg_stop(arg); 476 msg_start(arg); 477 } else { 478 ERROR("unknown control msg '%s'\n", msg); 479 } 480 } 481 482 static struct command *get_first_command(struct action *act) 483 { 484 struct listnode *node; 485 node = list_head(&act->commands); 486 if (!node || list_empty(&act->commands)) 487 return NULL; 488 489 return node_to_item(node, struct command, clist); 490 } 491 492 static struct command *get_next_command(struct action *act, struct command *cmd) 493 { 494 struct listnode *node; 495 node = cmd->clist.next; 496 if (!node) 497 return NULL; 498 if (node == &act->commands) 499 return NULL; 500 501 return node_to_item(node, struct command, clist); 502 } 503 504 static int is_last_command(struct action *act, struct command *cmd) 505 { 506 return (list_tail(&act->commands) == &cmd->clist); 507 } 508 509 void execute_one_command(void) 510 { 511 int ret; 512 513 if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) { 514 cur_action = action_remove_queue_head(); 515 cur_command = NULL; 516 if (!cur_action) 517 return; 518 INFO("processing action %p (%s)\n", cur_action, cur_action->name); 519 cur_command = get_first_command(cur_action); 520 } else { 521 cur_command = get_next_command(cur_action, cur_command); 522 } 523 524 if (!cur_command) 525 return; 526 527 ret = cur_command->func(cur_command->nargs, cur_command->args); 528 INFO("command '%s' r=%d\n", cur_command->args[0], ret); 529 } 530 531 static int wait_for_coldboot_done_action(int nargs, char **args) 532 { 533 int ret; 534 INFO("wait for %s\n", coldboot_done); 535 ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT); 536 if (ret) 537 ERROR("Timed out waiting for %s\n", coldboot_done); 538 return ret; 539 } 540 541 static int keychord_init_action(int nargs, char **args) 542 { 543 keychord_init(); 544 return 0; 545 } 546 547 static int console_init_action(int nargs, char **args) 548 { 549 int fd; 550 char tmp[PROP_VALUE_MAX]; 551 552 if (console[0]) { 553 snprintf(tmp, sizeof(tmp), "/dev/%s", console); 554 console_name = strdup(tmp); 555 } 556 557 fd = open(console_name, O_RDWR); 558 if (fd >= 0) 559 have_console = 1; 560 close(fd); 561 562 if( load_565rle_image(INIT_IMAGE_FILE) ) { 563 fd = open("/dev/tty0", O_WRONLY); 564 if (fd >= 0) { 565 const char *msg; 566 msg = "\n" 567 "\n" 568 "\n" 569 "\n" 570 "\n" 571 "\n" 572 "\n" // console is 40 cols x 30 lines 573 "\n" 574 "\n" 575 "\n" 576 "\n" 577 "\n" 578 "\n" 579 "\n" 580 " A N D R O I D "; 581 write(fd, msg, strlen(msg)); 582 close(fd); 583 } 584 } 585 return 0; 586 } 587 588 static void import_kernel_nv(char *name, int for_emulator) 589 { 590 char *value = strchr(name, '='); 591 int name_len = strlen(name); 592 593 if (value == 0) return; 594 *value++ = 0; 595 if (name_len == 0) return; 596 597 if (!strcmp(name,"selinux")) { 598 selinux_enabled = atoi(value); 599 } 600 601 if (for_emulator) { 602 /* in the emulator, export any kernel option with the 603 * ro.kernel. prefix */ 604 char buff[PROP_NAME_MAX]; 605 int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name ); 606 607 if (len < (int)sizeof(buff)) 608 property_set( buff, value ); 609 return; 610 } 611 612 if (!strcmp(name,"qemu")) { 613 strlcpy(qemu, value, sizeof(qemu)); 614 } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) { 615 const char *boot_prop_name = name + 12; 616 char prop[PROP_NAME_MAX]; 617 int cnt; 618 619 cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name); 620 if (cnt < PROP_NAME_MAX) 621 property_set(prop, value); 622 } 623 } 624 625 static void export_kernel_boot_props(void) 626 { 627 char tmp[PROP_VALUE_MAX]; 628 const char *pval; 629 unsigned i; 630 struct { 631 const char *src_prop; 632 const char *dest_prop; 633 const char *def_val; 634 } prop_map[] = { 635 { "ro.boot.serialno", "ro.serialno", "", }, 636 { "ro.boot.mode", "ro.bootmode", "unknown", }, 637 { "ro.boot.baseband", "ro.baseband", "unknown", }, 638 { "ro.boot.bootloader", "ro.bootloader", "unknown", }, 639 }; 640 641 for (i = 0; i < ARRAY_SIZE(prop_map); i++) { 642 pval = property_get(prop_map[i].src_prop); 643 property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val); 644 } 645 646 pval = property_get("ro.boot.console"); 647 if (pval) 648 strlcpy(console, pval, sizeof(console)); 649 650 /* save a copy for init's usage during boot */ 651 strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode)); 652 653 /* if this was given on kernel command line, override what we read 654 * before (e.g. from /proc/cpuinfo), if anything */ 655 pval = property_get("ro.boot.hardware"); 656 if (pval) 657 strlcpy(hardware, pval, sizeof(hardware)); 658 property_set("ro.hardware", hardware); 659 660 snprintf(tmp, PROP_VALUE_MAX, "%d", revision); 661 property_set("ro.revision", tmp); 662 663 /* TODO: these are obsolete. We should delete them */ 664 if (!strcmp(bootmode,"factory")) 665 property_set("ro.factorytest", "1"); 666 else if (!strcmp(bootmode,"factory2")) 667 property_set("ro.factorytest", "2"); 668 else 669 property_set("ro.factorytest", "0"); 670 } 671 672 static void process_kernel_cmdline(void) 673 { 674 /* don't expose the raw commandline to nonpriv processes */ 675 chmod("/proc/cmdline", 0440); 676 677 /* first pass does the common stuff, and finds if we are in qemu. 678 * second pass is only necessary for qemu to export all kernel params 679 * as props. 680 */ 681 import_kernel_cmdline(0, import_kernel_nv); 682 if (qemu[0]) 683 import_kernel_cmdline(1, import_kernel_nv); 684 685 /* now propogate the info given on command line to internal variables 686 * used by init as well as the current required properties 687 */ 688 export_kernel_boot_props(); 689 } 690 691 static int property_service_init_action(int nargs, char **args) 692 { 693 /* read any property files on system or data and 694 * fire up the property service. This must happen 695 * after the ro.foo properties are set above so 696 * that /data/local.prop cannot interfere with them. 697 */ 698 start_property_service(); 699 return 0; 700 } 701 702 static int signal_init_action(int nargs, char **args) 703 { 704 signal_init(); 705 return 0; 706 } 707 708 static int check_startup_action(int nargs, char **args) 709 { 710 /* make sure we actually have all the pieces we need */ 711 if ((get_property_set_fd() < 0) || 712 (get_signal_fd() < 0)) { 713 ERROR("init startup failure\n"); 714 exit(1); 715 } 716 717 /* signal that we hit this point */ 718 unlink("/dev/.booting"); 719 720 return 0; 721 } 722 723 static int queue_property_triggers_action(int nargs, char **args) 724 { 725 queue_all_property_triggers(); 726 /* enable property triggers */ 727 property_triggers_enabled = 1; 728 return 0; 729 } 730 731 #if BOOTCHART 732 static int bootchart_init_action(int nargs, char **args) 733 { 734 bootchart_count = bootchart_init(); 735 if (bootchart_count < 0) { 736 ERROR("bootcharting init failure\n"); 737 } else if (bootchart_count > 0) { 738 NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS); 739 } else { 740 NOTICE("bootcharting ignored\n"); 741 } 742 743 return 0; 744 } 745 #endif 746 747 static const struct selinux_opt seopts_prop[] = { 748 { SELABEL_OPT_PATH, "/data/security/property_contexts" }, 749 { SELABEL_OPT_PATH, "/property_contexts" }, 750 { 0, NULL } 751 }; 752 753 struct selabel_handle* selinux_android_prop_context_handle(void) 754 { 755 int i = 0; 756 struct selabel_handle* sehandle = NULL; 757 while ((sehandle == NULL) && seopts_prop[i].value) { 758 sehandle = selabel_open(SELABEL_CTX_ANDROID_PROP, &seopts_prop[i], 1); 759 i++; 760 } 761 762 if (!sehandle) { 763 ERROR("SELinux: Could not load property_contexts: %s\n", 764 strerror(errno)); 765 return NULL; 766 } 767 INFO("SELinux: Loaded property contexts from %s\n", seopts_prop[i - 1].value); 768 return sehandle; 769 } 770 771 void selinux_init_all_handles(void) 772 { 773 sehandle = selinux_android_file_context_handle(); 774 sehandle_prop = selinux_android_prop_context_handle(); 775 } 776 777 int selinux_reload_policy(void) 778 { 779 if (!selinux_enabled) { 780 return -1; 781 } 782 783 INFO("SELinux: Attempting to reload policy files\n"); 784 785 if (selinux_android_reload_policy() == -1) { 786 return -1; 787 } 788 789 if (sehandle) 790 selabel_close(sehandle); 791 792 if (sehandle_prop) 793 selabel_close(sehandle_prop); 794 795 selinux_init_all_handles(); 796 return 0; 797 } 798 799 int audit_callback(void *data, security_class_t cls, char *buf, size_t len) 800 { 801 snprintf(buf, len, "property=%s", !data ? "NULL" : (char *)data); 802 return 0; 803 } 804 805 int main(int argc, char **argv) 806 { 807 int fd_count = 0; 808 struct pollfd ufds[4]; 809 char *tmpdev; 810 char* debuggable; 811 char tmp[32]; 812 int property_set_fd_init = 0; 813 int signal_fd_init = 0; 814 int keychord_fd_init = 0; 815 bool is_charger = false; 816 817 if (!strcmp(basename(argv[0]), "ueventd")) 818 return ueventd_main(argc, argv); 819 820 if (!strcmp(basename(argv[0]), "watchdogd")) 821 return watchdogd_main(argc, argv); 822 823 /* clear the umask */ 824 umask(0); 825 826 /* Get the basic filesystem setup we need put 827 * together in the initramdisk on / and then we'll 828 * let the rc file figure out the rest. 829 */ 830 mkdir("/dev", 0755); 831 mkdir("/proc", 0755); 832 mkdir("/sys", 0755); 833 834 mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"); 835 mkdir("/dev/pts", 0755); 836 mkdir("/dev/socket", 0755); 837 mount("devpts", "/dev/pts", "devpts", 0, NULL); 838 mount("proc", "/proc", "proc", 0, NULL); 839 mount("sysfs", "/sys", "sysfs", 0, NULL); 840 841 /* indicate that booting is in progress to background fw loaders, etc */ 842 close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000)); 843 844 /* We must have some place other than / to create the 845 * device nodes for kmsg and null, otherwise we won't 846 * be able to remount / read-only later on. 847 * Now that tmpfs is mounted on /dev, we can actually 848 * talk to the outside world. 849 */ 850 open_devnull_stdio(); 851 klog_init(); 852 property_init(); 853 854 get_hardware_name(hardware, &revision); 855 856 process_kernel_cmdline(); 857 858 union selinux_callback cb; 859 cb.func_log = klog_write; 860 selinux_set_callback(SELINUX_CB_LOG, cb); 861 862 cb.func_audit = audit_callback; 863 selinux_set_callback(SELINUX_CB_AUDIT, cb); 864 865 INFO("loading selinux policy\n"); 866 if (selinux_enabled) { 867 if (selinux_android_load_policy() < 0) { 868 selinux_enabled = 0; 869 INFO("SELinux: Disabled due to failed policy load\n"); 870 } else { 871 selinux_init_all_handles(); 872 } 873 } else { 874 INFO("SELinux: Disabled by command line option\n"); 875 } 876 /* These directories were necessarily created before initial policy load 877 * and therefore need their security context restored to the proper value. 878 * This must happen before /dev is populated by ueventd. 879 */ 880 restorecon("/dev"); 881 restorecon("/dev/socket"); 882 restorecon("/dev/__properties__"); 883 884 is_charger = !strcmp(bootmode, "charger"); 885 886 INFO("property init\n"); 887 if (!is_charger) 888 property_load_boot_defaults(); 889 890 INFO("reading config file\n"); 891 init_parse_config_file("/init.rc"); 892 893 action_for_each_trigger("early-init", action_add_queue_tail); 894 895 queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done"); 896 queue_builtin_action(keychord_init_action, "keychord_init"); 897 queue_builtin_action(console_init_action, "console_init"); 898 899 /* execute all the boot actions to get us started */ 900 action_for_each_trigger("init", action_add_queue_tail); 901 902 /* skip mounting filesystems in charger mode */ 903 if (!is_charger) { 904 action_for_each_trigger("early-fs", action_add_queue_tail); 905 action_for_each_trigger("fs", action_add_queue_tail); 906 action_for_each_trigger("post-fs", action_add_queue_tail); 907 action_for_each_trigger("post-fs-data", action_add_queue_tail); 908 } 909 910 queue_builtin_action(property_service_init_action, "property_service_init"); 911 queue_builtin_action(signal_init_action, "signal_init"); 912 queue_builtin_action(check_startup_action, "check_startup"); 913 914 if (is_charger) { 915 action_for_each_trigger("charger", action_add_queue_tail); 916 } else { 917 action_for_each_trigger("early-boot", action_add_queue_tail); 918 action_for_each_trigger("boot", action_add_queue_tail); 919 } 920 921 /* run all property triggers based on current state of the properties */ 922 queue_builtin_action(queue_property_triggers_action, "queue_property_triggers"); 923 924 925 #if BOOTCHART 926 queue_builtin_action(bootchart_init_action, "bootchart_init"); 927 #endif 928 929 for(;;) { 930 int nr, i, timeout = -1; 931 932 execute_one_command(); 933 restart_processes(); 934 935 if (!property_set_fd_init && get_property_set_fd() > 0) { 936 ufds[fd_count].fd = get_property_set_fd(); 937 ufds[fd_count].events = POLLIN; 938 ufds[fd_count].revents = 0; 939 fd_count++; 940 property_set_fd_init = 1; 941 } 942 if (!signal_fd_init && get_signal_fd() > 0) { 943 ufds[fd_count].fd = get_signal_fd(); 944 ufds[fd_count].events = POLLIN; 945 ufds[fd_count].revents = 0; 946 fd_count++; 947 signal_fd_init = 1; 948 } 949 if (!keychord_fd_init && get_keychord_fd() > 0) { 950 ufds[fd_count].fd = get_keychord_fd(); 951 ufds[fd_count].events = POLLIN; 952 ufds[fd_count].revents = 0; 953 fd_count++; 954 keychord_fd_init = 1; 955 } 956 957 if (process_needs_restart) { 958 timeout = (process_needs_restart - gettime()) * 1000; 959 if (timeout < 0) 960 timeout = 0; 961 } 962 963 if (!action_queue_empty() || cur_action) 964 timeout = 0; 965 966 #if BOOTCHART 967 if (bootchart_count > 0) { 968 if (timeout < 0 || timeout > BOOTCHART_POLLING_MS) 969 timeout = BOOTCHART_POLLING_MS; 970 if (bootchart_step() < 0 || --bootchart_count == 0) { 971 bootchart_finish(); 972 bootchart_count = 0; 973 } 974 } 975 #endif 976 977 nr = poll(ufds, fd_count, timeout); 978 if (nr <= 0) 979 continue; 980 981 for (i = 0; i < fd_count; i++) { 982 if (ufds[i].revents == POLLIN) { 983 if (ufds[i].fd == get_property_set_fd()) 984 handle_property_set_fd(); 985 else if (ufds[i].fd == get_keychord_fd()) 986 handle_keychord(); 987 else if (ufds[i].fd == get_signal_fd()) 988 handle_signal(); 989 } 990 } 991 } 992 993 return 0; 994 } 995
