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/sockets.h> 37 #include <cutils/iosched_policy.h> 38 #include <private/android_filesystem_config.h> 39 #include <termios.h> 40 41 #include <sys/system_properties.h> 42 43 #include "devices.h" 44 #include "init.h" 45 #include "list.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 unsigned revision = 0; 69 static char qemu[32]; 70 71 static struct action *cur_action = NULL; 72 static struct command *cur_command = NULL; 73 static struct listnode *command_queue = NULL; 74 75 void notify_service_state(const char *name, const char *state) 76 { 77 char pname[PROP_NAME_MAX]; 78 int len = strlen(name); 79 if ((len + 10) > PROP_NAME_MAX) 80 return; 81 snprintf(pname, sizeof(pname), "init.svc.%s", name); 82 property_set(pname, state); 83 } 84 85 static int have_console; 86 static char *console_name = "/dev/console"; 87 static time_t process_needs_restart; 88 89 static const char *ENV[32]; 90 91 /* add_environment - add "key=value" to the current environment */ 92 int add_environment(const char *key, const char *val) 93 { 94 int n; 95 96 for (n = 0; n < 31; n++) { 97 if (!ENV[n]) { 98 size_t len = strlen(key) + strlen(val) + 2; 99 char *entry = malloc(len); 100 snprintf(entry, len, "%s=%s", key, val); 101 ENV[n] = entry; 102 return 0; 103 } 104 } 105 106 return 1; 107 } 108 109 static void zap_stdio(void) 110 { 111 int fd; 112 fd = open("/dev/null", O_RDWR); 113 dup2(fd, 0); 114 dup2(fd, 1); 115 dup2(fd, 2); 116 close(fd); 117 } 118 119 static void open_console() 120 { 121 int fd; 122 if ((fd = open(console_name, O_RDWR)) < 0) { 123 fd = open("/dev/null", O_RDWR); 124 } 125 dup2(fd, 0); 126 dup2(fd, 1); 127 dup2(fd, 2); 128 close(fd); 129 } 130 131 static void publish_socket(const char *name, int fd) 132 { 133 char key[64] = ANDROID_SOCKET_ENV_PREFIX; 134 char val[64]; 135 136 strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1, 137 name, 138 sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX)); 139 snprintf(val, sizeof(val), "%d", fd); 140 add_environment(key, val); 141 142 /* make sure we don't close-on-exec */ 143 fcntl(fd, F_SETFD, 0); 144 } 145 146 void service_start(struct service *svc, const char *dynamic_args) 147 { 148 struct stat s; 149 pid_t pid; 150 int needs_console; 151 int n; 152 153 /* starting a service removes it from the disabled 154 * state and immediately takes it out of the restarting 155 * state if it was in there 156 */ 157 svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING)); 158 svc->time_started = 0; 159 160 /* running processes require no additional work -- if 161 * they're in the process of exiting, we've ensured 162 * that they will immediately restart on exit, unless 163 * they are ONESHOT 164 */ 165 if (svc->flags & SVC_RUNNING) { 166 return; 167 } 168 169 needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0; 170 if (needs_console && (!have_console)) { 171 ERROR("service '%s' requires console\n", svc->name); 172 svc->flags |= SVC_DISABLED; 173 return; 174 } 175 176 if (stat(svc->args[0], &s) != 0) { 177 ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name); 178 svc->flags |= SVC_DISABLED; 179 return; 180 } 181 182 if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) { 183 ERROR("service '%s' must be one-shot to use dynamic args, disabling\n", 184 svc->args[0]); 185 svc->flags |= SVC_DISABLED; 186 return; 187 } 188 189 NOTICE("starting '%s'\n", svc->name); 190 191 pid = fork(); 192 193 if (pid == 0) { 194 struct socketinfo *si; 195 struct svcenvinfo *ei; 196 char tmp[32]; 197 int fd, sz; 198 199 if (properties_inited()) { 200 get_property_workspace(&fd, &sz); 201 sprintf(tmp, "%d,%d", dup(fd), sz); 202 add_environment("ANDROID_PROPERTY_WORKSPACE", tmp); 203 } 204 205 for (ei = svc->envvars; ei; ei = ei->next) 206 add_environment(ei->name, ei->value); 207 208 for (si = svc->sockets; si; si = si->next) { 209 int socket_type = ( 210 !strcmp(si->type, "stream") ? SOCK_STREAM : 211 (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET)); 212 int s = create_socket(si->name, socket_type, 213 si->perm, si->uid, si->gid); 214 if (s >= 0) { 215 publish_socket(si->name, s); 216 } 217 } 218 219 if (svc->ioprio_class != IoSchedClass_NONE) { 220 if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) { 221 ERROR("Failed to set pid %d ioprio = %d,%d: %s\n", 222 getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno)); 223 } 224 } 225 226 if (needs_console) { 227 setsid(); 228 open_console(); 229 } else { 230 zap_stdio(); 231 } 232 233 #if 0 234 for (n = 0; svc->args[n]; n++) { 235 INFO("args[%d] = '%s'\n", n, svc->args[n]); 236 } 237 for (n = 0; ENV[n]; n++) { 238 INFO("env[%d] = '%s'\n", n, ENV[n]); 239 } 240 #endif 241 242 setpgid(0, getpid()); 243 244 /* as requested, set our gid, supplemental gids, and uid */ 245 if (svc->gid) { 246 setgid(svc->gid); 247 } 248 if (svc->nr_supp_gids) { 249 setgroups(svc->nr_supp_gids, svc->supp_gids); 250 } 251 if (svc->uid) { 252 setuid(svc->uid); 253 } 254 255 if (!dynamic_args) { 256 if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) { 257 ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno)); 258 } 259 } else { 260 char *arg_ptrs[INIT_PARSER_MAXARGS+1]; 261 int arg_idx = svc->nargs; 262 char *tmp = strdup(dynamic_args); 263 char *next = tmp; 264 char *bword; 265 266 /* Copy the static arguments */ 267 memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *))); 268 269 while((bword = strsep(&next, " "))) { 270 arg_ptrs[arg_idx++] = bword; 271 if (arg_idx == INIT_PARSER_MAXARGS) 272 break; 273 } 274 arg_ptrs[arg_idx] = '\0'; 275 execve(svc->args[0], (char**) arg_ptrs, (char**) ENV); 276 } 277 _exit(127); 278 } 279 280 if (pid < 0) { 281 ERROR("failed to start '%s'\n", svc->name); 282 svc->pid = 0; 283 return; 284 } 285 286 svc->time_started = gettime(); 287 svc->pid = pid; 288 svc->flags |= SVC_RUNNING; 289 290 if (properties_inited()) 291 notify_service_state(svc->name, "running"); 292 } 293 294 void service_stop(struct service *svc) 295 { 296 /* we are no longer running, nor should we 297 * attempt to restart 298 */ 299 svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING)); 300 301 /* if the service has not yet started, prevent 302 * it from auto-starting with its class 303 */ 304 svc->flags |= SVC_DISABLED; 305 306 if (svc->pid) { 307 NOTICE("service '%s' is being killed\n", svc->name); 308 kill(-svc->pid, SIGTERM); 309 notify_service_state(svc->name, "stopping"); 310 } else { 311 notify_service_state(svc->name, "stopped"); 312 } 313 } 314 315 void property_changed(const char *name, const char *value) 316 { 317 if (property_triggers_enabled) 318 queue_property_triggers(name, value); 319 } 320 321 static void restart_service_if_needed(struct service *svc) 322 { 323 time_t next_start_time = svc->time_started + 5; 324 325 if (next_start_time <= gettime()) { 326 svc->flags &= (~SVC_RESTARTING); 327 service_start(svc, NULL); 328 return; 329 } 330 331 if ((next_start_time < process_needs_restart) || 332 (process_needs_restart == 0)) { 333 process_needs_restart = next_start_time; 334 } 335 } 336 337 static void restart_processes() 338 { 339 process_needs_restart = 0; 340 service_for_each_flags(SVC_RESTARTING, 341 restart_service_if_needed); 342 } 343 344 static void msg_start(const char *name) 345 { 346 struct service *svc; 347 char *tmp = NULL; 348 char *args = NULL; 349 350 if (!strchr(name, ':')) 351 svc = service_find_by_name(name); 352 else { 353 tmp = strdup(name); 354 args = strchr(tmp, ':'); 355 *args = '\0'; 356 args++; 357 358 svc = service_find_by_name(tmp); 359 } 360 361 if (svc) { 362 service_start(svc, args); 363 } else { 364 ERROR("no such service '%s'\n", name); 365 } 366 if (tmp) 367 free(tmp); 368 } 369 370 static void msg_stop(const char *name) 371 { 372 struct service *svc = service_find_by_name(name); 373 374 if (svc) { 375 service_stop(svc); 376 } else { 377 ERROR("no such service '%s'\n", name); 378 } 379 } 380 381 void handle_control_message(const char *msg, const char *arg) 382 { 383 if (!strcmp(msg,"start")) { 384 msg_start(arg); 385 } else if (!strcmp(msg,"stop")) { 386 msg_stop(arg); 387 } else { 388 ERROR("unknown control msg '%s'\n", msg); 389 } 390 } 391 392 static void import_kernel_nv(char *name, int in_qemu) 393 { 394 char *value = strchr(name, '='); 395 396 if (value == 0) return; 397 *value++ = 0; 398 if (*name == 0) return; 399 400 if (!in_qemu) 401 { 402 /* on a real device, white-list the kernel options */ 403 if (!strcmp(name,"qemu")) { 404 strlcpy(qemu, value, sizeof(qemu)); 405 } else if (!strcmp(name,"androidboot.console")) { 406 strlcpy(console, value, sizeof(console)); 407 } else if (!strcmp(name,"androidboot.mode")) { 408 strlcpy(bootmode, value, sizeof(bootmode)); 409 } else if (!strcmp(name,"androidboot.serialno")) { 410 strlcpy(serialno, value, sizeof(serialno)); 411 } else if (!strcmp(name,"androidboot.baseband")) { 412 strlcpy(baseband, value, sizeof(baseband)); 413 } else if (!strcmp(name,"androidboot.carrier")) { 414 strlcpy(carrier, value, sizeof(carrier)); 415 } else if (!strcmp(name,"androidboot.bootloader")) { 416 strlcpy(bootloader, value, sizeof(bootloader)); 417 } else if (!strcmp(name,"androidboot.hardware")) { 418 strlcpy(hardware, value, sizeof(hardware)); 419 } 420 } else { 421 /* in the emulator, export any kernel option with the 422 * ro.kernel. prefix */ 423 char buff[32]; 424 int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name ); 425 if (len < (int)sizeof(buff)) { 426 property_set( buff, value ); 427 } 428 } 429 } 430 431 static void import_kernel_cmdline(int in_qemu) 432 { 433 char cmdline[1024]; 434 char *ptr; 435 int fd; 436 437 fd = open("/proc/cmdline", O_RDONLY); 438 if (fd >= 0) { 439 int n = read(fd, cmdline, 1023); 440 if (n < 0) n = 0; 441 442 /* get rid of trailing newline, it happens */ 443 if (n > 0 && cmdline[n-1] == '\n') n--; 444 445 cmdline[n] = 0; 446 close(fd); 447 } else { 448 cmdline[0] = 0; 449 } 450 451 ptr = cmdline; 452 while (ptr && *ptr) { 453 char *x = strchr(ptr, ' '); 454 if (x != 0) *x++ = 0; 455 import_kernel_nv(ptr, in_qemu); 456 ptr = x; 457 } 458 459 /* don't expose the raw commandline to nonpriv processes */ 460 chmod("/proc/cmdline", 0440); 461 } 462 463 static struct command *get_first_command(struct action *act) 464 { 465 struct listnode *node; 466 node = list_head(&act->commands); 467 if (!node) 468 return NULL; 469 470 return node_to_item(node, struct command, clist); 471 } 472 473 static struct command *get_next_command(struct action *act, struct command *cmd) 474 { 475 struct listnode *node; 476 node = cmd->clist.next; 477 if (!node) 478 return NULL; 479 if (node == &act->commands) 480 return NULL; 481 482 return node_to_item(node, struct command, clist); 483 } 484 485 static int is_last_command(struct action *act, struct command *cmd) 486 { 487 return (list_tail(&act->commands) == &cmd->clist); 488 } 489 490 void execute_one_command(void) 491 { 492 int ret; 493 494 if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) { 495 cur_action = action_remove_queue_head(); 496 cur_command = NULL; 497 if (!cur_action) 498 return; 499 INFO("processing action %p (%s)\n", cur_action, cur_action->name); 500 cur_command = get_first_command(cur_action); 501 } else { 502 cur_command = get_next_command(cur_action, cur_command); 503 } 504 505 if (!cur_command) 506 return; 507 508 ret = cur_command->func(cur_command->nargs, cur_command->args); 509 INFO("command '%s' r=%d\n", cur_command->args[0], ret); 510 } 511 512 static int wait_for_coldboot_done_action(int nargs, char **args) 513 { 514 int ret; 515 INFO("wait for %s\n", coldboot_done); 516 ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT); 517 if (ret) 518 ERROR("Timed out waiting for %s\n", coldboot_done); 519 return ret; 520 } 521 522 static int property_init_action(int nargs, char **args) 523 { 524 INFO("property init\n"); 525 property_init(); 526 return 0; 527 } 528 529 static int keychord_init_action(int nargs, char **args) 530 { 531 keychord_init(); 532 return 0; 533 } 534 535 static int console_init_action(int nargs, char **args) 536 { 537 int fd; 538 char tmp[PROP_VALUE_MAX]; 539 540 if (console[0]) { 541 snprintf(tmp, sizeof(tmp), "/dev/%s", console); 542 console_name = strdup(tmp); 543 } 544 545 fd = open(console_name, O_RDWR); 546 if (fd >= 0) 547 have_console = 1; 548 close(fd); 549 550 if( load_565rle_image(INIT_IMAGE_FILE) ) { 551 fd = open("/dev/tty0", O_WRONLY); 552 if (fd >= 0) { 553 const char *msg; 554 msg = "\n" 555 "\n" 556 "\n" 557 "\n" 558 "\n" 559 "\n" 560 "\n" // console is 40 cols x 30 lines 561 "\n" 562 "\n" 563 "\n" 564 "\n" 565 "\n" 566 "\n" 567 "\n" 568 " A N D R O I D "; 569 write(fd, msg, strlen(msg)); 570 close(fd); 571 } 572 } 573 return 0; 574 } 575 576 static int set_init_properties_action(int nargs, char **args) 577 { 578 char tmp[PROP_VALUE_MAX]; 579 580 if (qemu[0]) 581 import_kernel_cmdline(1); 582 583 if (!strcmp(bootmode,"factory")) 584 property_set("ro.factorytest", "1"); 585 else if (!strcmp(bootmode,"factory2")) 586 property_set("ro.factorytest", "2"); 587 else 588 property_set("ro.factorytest", "0"); 589 590 property_set("ro.serialno", serialno[0] ? serialno : ""); 591 property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown"); 592 property_set("ro.baseband", baseband[0] ? baseband : "unknown"); 593 property_set("ro.carrier", carrier[0] ? carrier : "unknown"); 594 property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown"); 595 596 property_set("ro.hardware", hardware); 597 snprintf(tmp, PROP_VALUE_MAX, "%d", revision); 598 property_set("ro.revision", tmp); 599 return 0; 600 } 601 602 static int property_service_init_action(int nargs, char **args) 603 { 604 /* read any property files on system or data and 605 * fire up the property service. This must happen 606 * after the ro.foo properties are set above so 607 * that /data/local.prop cannot interfere with them. 608 */ 609 start_property_service(); 610 return 0; 611 } 612 613 static int signal_init_action(int nargs, char **args) 614 { 615 signal_init(); 616 return 0; 617 } 618 619 static int check_startup_action(int nargs, char **args) 620 { 621 /* make sure we actually have all the pieces we need */ 622 if ((get_property_set_fd() < 0) || 623 (get_signal_fd() < 0)) { 624 ERROR("init startup failure\n"); 625 exit(1); 626 } 627 return 0; 628 } 629 630 static int queue_property_triggers_action(int nargs, char **args) 631 { 632 queue_all_property_triggers(); 633 /* enable property triggers */ 634 property_triggers_enabled = 1; 635 return 0; 636 } 637 638 #if BOOTCHART 639 static int bootchart_init_action(int nargs, char **args) 640 { 641 bootchart_count = bootchart_init(); 642 if (bootchart_count < 0) { 643 ERROR("bootcharting init failure\n"); 644 } else if (bootchart_count > 0) { 645 NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS); 646 } else { 647 NOTICE("bootcharting ignored\n"); 648 } 649 } 650 #endif 651 652 int main(int argc, char **argv) 653 { 654 int fd_count = 0; 655 struct pollfd ufds[4]; 656 char *tmpdev; 657 char* debuggable; 658 char tmp[32]; 659 int property_set_fd_init = 0; 660 int signal_fd_init = 0; 661 int keychord_fd_init = 0; 662 663 if (!strcmp(basename(argv[0]), "ueventd")) 664 return ueventd_main(argc, argv); 665 666 /* clear the umask */ 667 umask(0); 668 669 /* Get the basic filesystem setup we need put 670 * together in the initramdisk on / and then we'll 671 * let the rc file figure out the rest. 672 */ 673 mkdir("/dev", 0755); 674 mkdir("/proc", 0755); 675 mkdir("/sys", 0755); 676 677 mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755"); 678 mkdir("/dev/pts", 0755); 679 mkdir("/dev/socket", 0755); 680 mount("devpts", "/dev/pts", "devpts", 0, NULL); 681 mount("proc", "/proc", "proc", 0, NULL); 682 mount("sysfs", "/sys", "sysfs", 0, NULL); 683 684 /* We must have some place other than / to create the 685 * device nodes for kmsg and null, otherwise we won't 686 * be able to remount / read-only later on. 687 * Now that tmpfs is mounted on /dev, we can actually 688 * talk to the outside world. 689 */ 690 open_devnull_stdio(); 691 log_init(); 692 693 INFO("reading config file\n"); 694 init_parse_config_file("/init.rc"); 695 696 /* pull the kernel commandline and ramdisk properties file in */ 697 import_kernel_cmdline(0); 698 699 get_hardware_name(hardware, &revision); 700 snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware); 701 init_parse_config_file(tmp); 702 703 action_for_each_trigger("early-init", action_add_queue_tail); 704 705 queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done"); 706 queue_builtin_action(property_init_action, "property_init"); 707 queue_builtin_action(keychord_init_action, "keychord_init"); 708 queue_builtin_action(console_init_action, "console_init"); 709 queue_builtin_action(set_init_properties_action, "set_init_properties"); 710 711 /* execute all the boot actions to get us started */ 712 action_for_each_trigger("init", action_add_queue_tail); 713 action_for_each_trigger("early-fs", action_add_queue_tail); 714 action_for_each_trigger("fs", action_add_queue_tail); 715 action_for_each_trigger("post-fs", action_add_queue_tail); 716 717 queue_builtin_action(property_service_init_action, "property_service_init"); 718 queue_builtin_action(signal_init_action, "signal_init"); 719 queue_builtin_action(check_startup_action, "check_startup"); 720 721 /* execute all the boot actions to get us started */ 722 action_for_each_trigger("early-boot", action_add_queue_tail); 723 action_for_each_trigger("boot", action_add_queue_tail); 724 725 /* run all property triggers based on current state of the properties */ 726 queue_builtin_action(queue_property_triggers_action, "queue_propety_triggers"); 727 728 729 #if BOOTCHART 730 queue_builtin_action(bootchart_init_action, "bootchart_init"); 731 #endif 732 733 for(;;) { 734 int nr, i, timeout = -1; 735 736 execute_one_command(); 737 restart_processes(); 738 739 if (!property_set_fd_init && get_property_set_fd() > 0) { 740 ufds[fd_count].fd = get_property_set_fd(); 741 ufds[fd_count].events = POLLIN; 742 ufds[fd_count].revents = 0; 743 fd_count++; 744 property_set_fd_init = 1; 745 } 746 if (!signal_fd_init && get_signal_fd() > 0) { 747 ufds[fd_count].fd = get_signal_fd(); 748 ufds[fd_count].events = POLLIN; 749 ufds[fd_count].revents = 0; 750 fd_count++; 751 signal_fd_init = 1; 752 } 753 if (!keychord_fd_init && get_keychord_fd() > 0) { 754 ufds[fd_count].fd = get_keychord_fd(); 755 ufds[fd_count].events = POLLIN; 756 ufds[fd_count].revents = 0; 757 fd_count++; 758 keychord_fd_init = 1; 759 } 760 761 if (process_needs_restart) { 762 timeout = (process_needs_restart - gettime()) * 1000; 763 if (timeout < 0) 764 timeout = 0; 765 } 766 767 if (!action_queue_empty() || cur_action) 768 timeout = 0; 769 770 #if BOOTCHART 771 if (bootchart_count > 0) { 772 if (timeout < 0 || timeout > BOOTCHART_POLLING_MS) 773 timeout = BOOTCHART_POLLING_MS; 774 if (bootchart_step() < 0 || --bootchart_count == 0) { 775 bootchart_finish(); 776 bootchart_count = 0; 777 } 778 } 779 #endif 780 781 nr = poll(ufds, fd_count, timeout); 782 if (nr <= 0) 783 continue; 784 785 for (i = 0; i < fd_count; i++) { 786 if (ufds[i].revents == POLLIN) { 787 if (ufds[i].fd == get_property_set_fd()) 788 handle_property_set_fd(); 789 else if (ufds[i].fd == get_keychord_fd()) 790 handle_keychord(); 791 else if (ufds[i].fd == get_signal_fd()) 792 handle_signal(); 793 } 794 } 795 } 796 797 return 0; 798 } 799
