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 #include <libgen.h> 35 36 #include <cutils/list.h> 37 #include <cutils/sockets.h> 38 #include <cutils/iosched_policy.h> 39 #include <private/android_filesystem_config.h> 40 #include <termios.h> 41 42 #include <sys/system_properties.h> 43 44 #include "devices.h" 45 #include "init.h" 46 #include "log.h" 47 #include "property_service.h" 48 #include "bootchart.h" 49 #include "signal_handler.h" 50 #include "keychords.h" 51 #include "init_parser.h" 52 #include "util.h" 53 #include "ueventd.h" 54 55 static int property_triggers_enabled = 0; 56 57 #if BOOTCHART 58 static int bootchart_count; 59 #endif 60 61 static char console[32]; 62 static char serialno[32]; 63 static char bootmode[32]; 64 static char baseband[32]; 65 static char carrier[32]; 66 static char bootloader[32]; 67 static char hardware[32]; 68 static char modelno[32]; 69 static unsigned revision = 0; 70 static char qemu[32]; 71 72 static struct action *cur_action = NULL; 73 static struct command *cur_command = NULL; 74 static struct listnode *command_queue = NULL; 75 76 void notify_service_state(const char *name, const char *state) 77 { 78 char pname[PROP_NAME_MAX]; 79 int len = strlen(name); 80 if ((len + 10) > PROP_NAME_MAX) 81 return; 82 snprintf(pname, sizeof(pname), "init.svc.%s", name); 83 property_set(pname, state); 84 } 85 86 static int have_console; 87 static char *console_name = "/dev/console"; 88 static time_t process_needs_restart; 89 90 static const char *ENV[32]; 91 92 /* add_environment - add "key=value" to the current environment */ 93 int add_environment(const char *key, const char *val) 94 { 95 int n; 96 97 for (n = 0; n < 31; n++) { 98 if (!ENV[n]) { 99 size_t len = strlen(key) + strlen(val) + 2; 100 char *entry = malloc(len); 101 snprintf(entry, len, "%s=%s", key, val); 102 ENV[n] = entry; 103 return 0; 104 } 105 } 106 107 return 1; 108 } 109 110 static void zap_stdio(void) 111 { 112 int fd; 113 fd = open("/dev/null", O_RDWR); 114 dup2(fd, 0); 115 dup2(fd, 1); 116 dup2(fd, 2); 117 close(fd); 118 } 119 120 static void open_console() 121 { 122 int fd; 123 if ((fd = open(console_name, O_RDWR)) < 0) { 124 fd = open("/dev/null", O_RDWR); 125 } 126 dup2(fd, 0); 127 dup2(fd, 1); 128 dup2(fd, 2); 129 close(fd); 130 } 131 132 static void publish_socket(const char *name, int fd) 133 { 134 char key[64] = ANDROID_SOCKET_ENV_PREFIX; 135 char val[64]; 136 137 strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 138 name, 139 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 140 snprintf(val, sizeof(val), "%d", fd); 141 add_environment(key, val); 142 143 /* make sure we don't close-on-exec */ 144 fcntl(fd, F_SETFD, 0); 145 } 146 147 void service_start(struct service *svc, const char *dynamic_args) 148 { 149 struct stat s; 150 pid_t pid; 151 int needs_console; 152 int n; 153 154 /* starting a service removes it from the disabled or reset 155 * state and immediately takes it out of the restarting 156 * state if it was in there 157 */ 158 svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET)); 159 svc->time_started = 0; 160 161 /* running processes require no additional work -- if 162 * they're in the process of exiting, we've ensured 163 * that they will immediately restart on exit, unless 164 * they are ONESHOT 165 */ 166 if (svc->flags & SVC_RUNNING) { 167 return; 168 } 169 170 needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0; 171 if (needs_console && (!have_console)) { 172 ERROR("service '%s' requires console\n", svc->name); 173 svc->flags |= SVC_DISABLED; 174 return; 175 } 176 177 if (stat(svc->args[0], &s) != 0) { 178 ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name); 179 svc->flags |= SVC_DISABLED; 180 return; 181 } 182 183 if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) { 184 ERROR("service '%s' must be one-shot to use dynamic args, disabling\n", 185 svc->args[0]); 186 svc->flags |= SVC_DISABLED; 187 return; 188 } 189 190 NOTICE("starting '%s'\n", svc->name); 191 192 pid = fork(); 193 194 if (pid == 0) { 195 struct socketinfo *si; 196 struct svcenvinfo *ei; 197 char tmp[32]; 198 int fd, sz; 199 200 if (properties_inited()) { 201 get_property_workspace(&fd, &sz); 202 sprintf(tmp, "%d,%d", dup(fd), sz); 203 add_environment("ANDROID_PROPERTY_WORKSPACE", tmp); 204 } 205 206 for (ei = svc->envvars; ei; ei = ei->next) 207 add_environment(ei->name, ei->value); 208 209 for (si = svc->sockets; si; si = si->next) { 210 int socket_type = ( 211 !strcmp(si->type, "stream") ? SOCK_STREAM : 212 (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET)); 213 int s = create_socket(si->name, socket_type, 214 si->perm, si->uid, si->gid); 215 if (s >= 0) { 216 publish_socket(si->name, s); 217 } 218 } 219 220 if (svc->ioprio_class != IoSchedClass_NONE) { 221 if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) { 222 ERROR("Failed to set pid %d ioprio = %d,%d: %s\n", 223 getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno)); 224 } 225 } 226 227 if (needs_console) { 228 setsid(); 229 open_console(); 230 } else { 231 zap_stdio(); 232 } 233 234 #if 0 235 for (n = 0; svc->args[n]; n++) { 236 INFO("args[%d] = '%s'\n", n, svc->args[n]); 237 } 238 for (n = 0; ENV[n]; n++) { 239 INFO("env[%d] = '%s'\n", n, ENV[n]); 240 } 241 #endif 242 243 setpgid(0, getpid()); 244 245 /* as requested, set our gid, supplemental gids, and uid */ 246 if (svc->gid) { 247 if (setgid(svc->gid) != 0) { 248 ERROR("setgid failed: %s\n", strerror(errno)); 249 _exit(127); 250 } 251 } 252 if (svc->nr_supp_gids) { 253 if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) { 254 ERROR("setgroups failed: %s\n", strerror(errno)); 255 _exit(127); 256 } 257 } 258 if (svc->uid) { 259 if (setuid(svc->uid) != 0) { 260 ERROR("setuid failed: %s\n", strerror(errno)); 261 _exit(127); 262 } 263 } 264 265 if (!dynamic_args) { 266 if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) { 267 ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno)); 268 } 269 } else { 270 char *arg_ptrs[INIT_PARSER_MAXARGS+1]; 271 int arg_idx = svc->nargs; 272 char *tmp = strdup(dynamic_args); 273 char *next = tmp; 274 char *bword; 275 276 /* Copy the static arguments */ 277 memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *))); 278 279 while((bword = strsep(&next, " "))) { 280 arg_ptrs[arg_idx++] = bword; 281 if (arg_idx == INIT_PARSER_MAXARGS) 282 break; 283 } 284 arg_ptrs[arg_idx] = '\0'; 285 execve(svc->args[0], (char**) arg_ptrs, (char**) ENV); 286 } 287 _exit(127); 288 } 289 290 if (pid < 0) { 291 ERROR("failed to start '%s'\n", svc->name); 292 svc->pid = 0; 293 return; 294 } 295 296 svc->time_started = gettime(); 297 svc->pid = pid; 298 svc->flags |= SVC_RUNNING; 299 300 if (properties_inited()) 301 notify_service_state(svc->name, "running"); 302 } 303 304 /* The how field should be either SVC_DISABLED or SVC_RESET */ 305 static void service_stop_or_reset(struct service *svc, int how) 306 { 307 /* we are no longer running, nor should we 308 * attempt to restart 309 */ 310 svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING)); 311 312 if ((how != SVC_DISABLED) && (how != SVC_RESET)) { 313 /* Hrm, an illegal flag. Default to SVC_DISABLED */ 314 how = SVC_DISABLED; 315 } 316 /* if the service has not yet started, prevent 317 * it from auto-starting with its class 318 */ 319 if (how == SVC_RESET) { 320 svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET; 321 } else { 322 svc->flags |= how; 323 } 324 325 if (svc->pid) { 326 NOTICE("service '%s' is being killed\n", svc->name); 327 kill(-svc->pid, SIGKILL); 328 notify_service_state(svc->name, "stopping"); 329 } else { 330 notify_service_state(svc->name, "stopped"); 331 } 332 } 333 334 void service_reset(struct service *svc) 335 { 336 service_stop_or_reset(svc, SVC_RESET); 337 } 338 339 void service_stop(struct service *svc) 340 { 341 service_stop_or_reset(svc, SVC_DISABLED); 342 } 343 344 void property_changed(const char *name, const char *value) 345 { 346 if (property_triggers_enabled) 347 queue_property_triggers(name, value); 348 } 349 350 static void restart_service_if_needed(struct service *svc) 351 { 352 time_t next_start_time = svc->time_started + 5; 353 354 if (next_start_time <= gettime()) { 355 svc->flags &= (~SVC_RESTARTING); 356 service_start(svc, NULL); 357 return; 358 } 359 360 if ((next_start_time < process_needs_restart) || 361 (process_needs_restart == 0)) { 362 process_needs_restart = next_start_time; 363 } 364 } 365 366 static void restart_processes() 367 { 368 process_needs_restart = 0; 369 service_for_each_flags(SVC_RESTARTING, 370 restart_service_if_needed); 371 } 372 373 static void msg_start(const char *name) 374 { 375 struct service *svc; 376 char *tmp = NULL; 377 char *args = NULL; 378 379 if (!strchr(name, ':')) 380 svc = service_find_by_name(name); 381 else { 382 tmp = strdup(name); 383 args = strchr(tmp, ':'); 384 *args = '\0'; 385 args++; 386 387 svc = service_find_by_name(tmp); 388 } 389 390 if (svc) { 391 service_start(svc, args); 392 } else { 393 ERROR("no such service '%s'\n", name); 394 } 395 if (tmp) 396 free(tmp); 397 } 398 399 static void msg_stop(const char *name) 400 { 401 struct service *svc = service_find_by_name(name); 402 403 if (svc) { 404 service_stop(svc); 405 } else { 406 ERROR("no such service '%s'\n", name); 407 } 408 } 409 410 void handle_control_message(const char *msg, const char *arg) 411 { 412 if (!strcmp(msg,"start")) { 413 msg_start(arg); 414 } else if (!strcmp(msg,"stop")) { 415 msg_stop(arg); 416 } else if (!strcmp(msg,"restart")) { 417 msg_stop(arg); 418 msg_start(arg); 419 } else { 420 ERROR("unknown control msg '%s'\n", msg); 421 } 422 } 423 424 static void import_kernel_nv(char *name, int in_qemu) 425 { 426 char *value = strchr(name, '='); 427 428 if (value == 0) return; 429 *value++ = 0; 430 if (*name == 0) return; 431 432 if (!in_qemu) 433 { 434 /* on a real device, white-list the kernel options */ 435 if (!strcmp(name,"qemu")) { 436 strlcpy(qemu, value, sizeof(qemu)); 437 } else if (!strcmp(name,"androidboot.console")) { 438 strlcpy(console, value, sizeof(console)); 439 } else if (!strcmp(name,"androidboot.mode")) { 440 strlcpy(bootmode, value, sizeof(bootmode)); 441 } else if (!strcmp(name,"androidboot.serialno")) { 442 strlcpy(serialno, value, sizeof(serialno)); 443 } else if (!strcmp(name,"androidboot.baseband")) { 444 strlcpy(baseband, value, sizeof(baseband)); 445 } else if (!strcmp(name,"androidboot.carrier")) { 446 strlcpy(carrier, value, sizeof(carrier)); 447 } else if (!strcmp(name,"androidboot.bootloader")) { 448 strlcpy(bootloader, value, sizeof(bootloader)); 449 } else if (!strcmp(name,"androidboot.hardware")) { 450 strlcpy(hardware, value, sizeof(hardware)); 451 } else if (!strcmp(name,"androidboot.modelno")) { 452 strlcpy(modelno, value, sizeof(modelno)); 453 } 454 } else { 455 /* in the emulator, export any kernel option with the 456 * ro.kernel. prefix */ 457 char buff[32]; 458 int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name ); 459 if (len < (int)sizeof(buff)) { 460 property_set( buff, value ); 461 } 462 } 463 } 464 465 static struct command *get_first_command(struct action *act) 466 { 467 struct listnode *node; 468 node = list_head(&act->commands); 469 if (!node || list_empty(&act->commands)) 470 return NULL; 471 472 return node_to_item(node, struct command, clist); 473 } 474 475 static struct command *get_next_command(struct action *act, struct command *cmd) 476 { 477 struct listnode *node; 478 node = cmd->clist.next; 479 if (!node) 480 return NULL; 481 if (node == &act->commands) 482 return NULL; 483 484 return node_to_item(node, struct command, clist); 485 } 486 487 static int is_last_command(struct action *act, struct command *cmd) 488 { 489 return (list_tail(&act->commands) == &cmd->clist); 490 } 491 492 void execute_one_command(void) 493 { 494 int ret; 495 496 if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) { 497 cur_action = action_remove_queue_head(); 498 cur_command = NULL; 499 if (!cur_action) 500 return; 501 INFO("processing action %p (%s)\n", cur_action, cur_action->name); 502 cur_command = get_first_command(cur_action); 503 } else { 504 cur_command = get_next_command(cur_action, cur_command); 505 } 506 507 if (!cur_command) 508 return; 509 510 ret = cur_command->func(cur_command->nargs, cur_command->args); 511 INFO("command '%s' r=%d\n", cur_command->args[0], ret); 512 } 513 514 static int wait_for_coldboot_done_action(int nargs, char **args) 515 { 516 int ret; 517 INFO("wait for %s\n", coldboot_done); 518 ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT); 519 if (ret) 520 ERROR("Timed out waiting for %s\n", coldboot_done); 521 return ret; 522 } 523 524 static int property_init_action(int nargs, char **args) 525 { 526 bool load_defaults = true; 527 528 INFO("property init\n"); 529 if (!strcmp(bootmode, "charger")) 530 load_defaults = false; 531 property_init(load_defaults); 532 return 0; 533 } 534 535 static int keychord_init_action(int nargs, char **args) 536 { 537 keychord_init(); 538 return 0; 539 } 540 541 static int console_init_action(int nargs, char **args) 542 { 543 int fd; 544 char tmp[PROP_VALUE_MAX]; 545 546 if (console[0]) { 547 snprintf(tmp, sizeof(tmp), "/dev/%s", console); 548 console_name = strdup(tmp); 549 } 550 551 fd = open(console_name, O_RDWR); 552 if (fd >= 0) 553 have_console = 1; 554 close(fd); 555 556 if( load_565rle_image(INIT_IMAGE_FILE) ) { 557 fd = open("/dev/tty0", O_WRONLY); 558 if (fd >= 0) { 559 const char *msg; 560 msg = "\n" 561 "\n" 562 "\n" 563 "\n" 564 "\n" 565 "\n" 566 "\n" // console is 40 cols x 30 lines 567 "\n" 568 "\n" 569 "\n" 570 "\n" 571 "\n" 572 "\n" 573 "\n" 574 " A N D R O I D "; 575 write(fd, msg, strlen(msg)); 576 close(fd); 577 } 578 } 579 return 0; 580 } 581 582 static int set_init_properties_action(int nargs, char **args) 583 { 584 char tmp[PROP_VALUE_MAX]; 585 586 if (qemu[0]) 587 import_kernel_cmdline(1, import_kernel_nv); 588 589 if (!strcmp(bootmode,"factory")) 590 property_set("ro.factorytest", "1"); 591 else if (!strcmp(bootmode,"factory2")) 592 property_set("ro.factorytest", "2"); 593 else 594 property_set("ro.factorytest", "0"); 595 596 property_set("ro.serialno", serialno[0] ? serialno : ""); 597 property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown"); 598 property_set("ro.baseband", baseband[0] ? baseband : "unknown"); 599 property_set("ro.carrier", carrier[0] ? carrier : "unknown"); 600 property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown"); 601 602 if (modelno[0]) 603 property_set("ro.boot.modelno", modelno); 604 605 property_set("ro.hardware", hardware); 606 snprintf(tmp, PROP_VALUE_MAX, "%d", revision); 607 property_set("ro.revision", tmp); 608 return 0; 609 } 610 611 static int property_service_init_action(int nargs, char **args) 612 { 613 /* read any property files on system or data and 614 * fire up the property service. This must happen 615 * after the ro.foo properties are set above so 616 * that /data/local.prop cannot interfere with them. 617 */ 618 start_property_service(); 619 return 0; 620 } 621 622 static int signal_init_action(int nargs, char **args) 623 { 624 signal_init(); 625 return 0; 626 } 627 628 static int check_startup_action(int nargs, char **args) 629 { 630 /* make sure we actually have all the pieces we need */ 631 if ((get_property_set_fd() < 0) || 632 (get_signal_fd() < 0)) { 633 ERROR("init startup failure\n"); 634 exit(1); 635 } 636 637 /* signal that we hit this point */ 638 unlink("/dev/.booting"); 639 640 return 0; 641 } 642 643 static int queue_property_triggers_action(int nargs, char **args) 644 { 645 queue_all_property_triggers(); 646 /* enable property triggers */ 647 property_triggers_enabled = 1; 648 return 0; 649 } 650 651 #if BOOTCHART 652 static int bootchart_init_action(int nargs, char **args) 653 { 654 bootchart_count = bootchart_init(); 655 if (bootchart_count < 0) { 656 ERROR("bootcharting init failure\n"); 657 } else if (bootchart_count > 0) { 658 NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS); 659 } else { 660 NOTICE("bootcharting ignored\n"); 661 } 662 663 return 0; 664 } 665 #endif 666 667 int main(int argc, char **argv) 668 { 669 int fd_count = 0; 670 struct pollfd ufds[4]; 671 char *tmpdev; 672 char* debuggable; 673 char tmp[32]; 674 int property_set_fd_init = 0; 675 int signal_fd_init = 0; 676 int keychord_fd_init = 0; 677 678 if (!strcmp(basename(argv[0]), "ueventd")) 679 return ueventd_main(argc, argv); 680 681 /* clear the umask */ 682 umask(0); 683 684 /* Get the basic filesystem setup we need put 685 * together in the initramdisk on / and then we'll 686 * let the rc file figure out the rest. 687 */ 688 mkdir("/dev", 0755); 689 mkdir("/proc", 0755); 690 mkdir("/sys", 0755); 691 692 mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755"); 693 mkdir("/dev/pts", 0755); 694 mkdir("/dev/socket", 0755); 695 mount("devpts", "/dev/pts", "devpts", 0, NULL); 696 mount("proc", "/proc", "proc", 0, NULL); 697 mount("sysfs", "/sys", "sysfs", 0, NULL); 698 699 /* indicate that booting is in progress to background fw loaders, etc */ 700 close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000)); 701 702 /* We must have some place other than / to create the 703 * device nodes for kmsg and null, otherwise we won't 704 * be able to remount / read-only later on. 705 * Now that tmpfs is mounted on /dev, we can actually 706 * talk to the outside world. 707 */ 708 open_devnull_stdio(); 709 klog_init(); 710 711 INFO("reading config file\n"); 712 init_parse_config_file("/init.rc"); 713 714 /* pull the kernel commandline and ramdisk properties file in */ 715 import_kernel_cmdline(0, import_kernel_nv); 716 /* don't expose the raw commandline to nonpriv processes */ 717 chmod("/proc/cmdline", 0440); 718 get_hardware_name(hardware, &revision); 719 snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware); 720 init_parse_config_file(tmp); 721 722 action_for_each_trigger("early-init", action_add_queue_tail); 723 724 queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done"); 725 queue_builtin_action(property_init_action, "property_init"); 726 queue_builtin_action(keychord_init_action, "keychord_init"); 727 queue_builtin_action(console_init_action, "console_init"); 728 queue_builtin_action(set_init_properties_action, "set_init_properties"); 729 730 /* execute all the boot actions to get us started */ 731 action_for_each_trigger("init", action_add_queue_tail); 732 733 /* skip mounting filesystems in charger mode */ 734 if (strcmp(bootmode, "charger") != 0) { 735 action_for_each_trigger("early-fs", action_add_queue_tail); 736 action_for_each_trigger("fs", action_add_queue_tail); 737 action_for_each_trigger("post-fs", action_add_queue_tail); 738 action_for_each_trigger("post-fs-data", action_add_queue_tail); 739 } 740 741 queue_builtin_action(property_service_init_action, "property_service_init"); 742 queue_builtin_action(signal_init_action, "signal_init"); 743 queue_builtin_action(check_startup_action, "check_startup"); 744 745 if (!strcmp(bootmode, "charger")) { 746 action_for_each_trigger("charger", action_add_queue_tail); 747 } else { 748 action_for_each_trigger("early-boot", action_add_queue_tail); 749 action_for_each_trigger("boot", action_add_queue_tail); 750 } 751 752 /* run all property triggers based on current state of the properties */ 753 queue_builtin_action(queue_property_triggers_action, "queue_propety_triggers"); 754 755 756 #if BOOTCHART 757 queue_builtin_action(bootchart_init_action, "bootchart_init"); 758 #endif 759 760 for(;;) { 761 int nr, i, timeout = -1; 762 763 execute_one_command(); 764 restart_processes(); 765 766 if (!property_set_fd_init && get_property_set_fd() > 0) { 767 ufds[fd_count].fd = get_property_set_fd(); 768 ufds[fd_count].events = POLLIN; 769 ufds[fd_count].revents = 0; 770 fd_count++; 771 property_set_fd_init = 1; 772 } 773 if (!signal_fd_init && get_signal_fd() > 0) { 774 ufds[fd_count].fd = get_signal_fd(); 775 ufds[fd_count].events = POLLIN; 776 ufds[fd_count].revents = 0; 777 fd_count++; 778 signal_fd_init = 1; 779 } 780 if (!keychord_fd_init && get_keychord_fd() > 0) { 781 ufds[fd_count].fd = get_keychord_fd(); 782 ufds[fd_count].events = POLLIN; 783 ufds[fd_count].revents = 0; 784 fd_count++; 785 keychord_fd_init = 1; 786 } 787 788 if (process_needs_restart) { 789 timeout = (process_needs_restart - gettime()) * 1000; 790 if (timeout < 0) 791 timeout = 0; 792 } 793 794 if (!action_queue_empty() || cur_action) 795 timeout = 0; 796 797 #if BOOTCHART 798 if (bootchart_count > 0) { 799 if (timeout < 0 || timeout > BOOTCHART_POLLING_MS) 800 timeout = BOOTCHART_POLLING_MS; 801 if (bootchart_step() < 0 || --bootchart_count == 0) { 802 bootchart_finish(); 803 bootchart_count = 0; 804 } 805 } 806 #endif 807 808 nr = poll(ufds, fd_count, timeout); 809 if (nr <= 0) 810 continue; 811 812 for (i = 0; i < fd_count; i++) { 813 if (ufds[i].revents == POLLIN) { 814 if (ufds[i].fd == get_property_set_fd()) 815 handle_property_set_fd(); 816 else if (ufds[i].fd == get_keychord_fd()) 817 handle_keychord(); 818 else if (ufds[i].fd == get_signal_fd()) 819 handle_signal(); 820 } 821 } 822 } 823 824 return 0; 825 } 826
