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
notify_service_state(const char * name,const char * state)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 */
add_environment(const char * key,const char * val)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
zap_stdio(void)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
open_console()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
publish_socket(const char * name,int fd)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
service_start(struct service * svc,const char * dynamic_args)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 */
service_stop_or_reset(struct service * svc,int how)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
service_reset(struct service * svc)392 void service_reset(struct service *svc)
393 {
394 service_stop_or_reset(svc, SVC_RESET);
395 }
396
service_stop(struct service * svc)397 void service_stop(struct service *svc)
398 {
399 service_stop_or_reset(svc, SVC_DISABLED);
400 }
401
property_changed(const char * name,const char * value)402 void property_changed(const char *name, const char *value)
403 {
404 if (property_triggers_enabled)
405 queue_property_triggers(name, value);
406 }
407
restart_service_if_needed(struct service * svc)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
restart_processes()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
msg_start(const char * name)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
msg_stop(const char * name)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
handle_control_message(const char * msg,const char * arg)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
get_first_command(struct action * act)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
get_next_command(struct action * act,struct command * cmd)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
is_last_command(struct action * act,struct command * cmd)504 static int is_last_command(struct action *act, struct command *cmd)
505 {
506 return (list_tail(&act->commands) == &cmd->clist);
507 }
508
execute_one_command(void)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
wait_for_coldboot_done_action(int nargs,char ** args)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
keychord_init_action(int nargs,char ** args)541 static int keychord_init_action(int nargs, char **args)
542 {
543 keychord_init();
544 return 0;
545 }
546
console_init_action(int nargs,char ** args)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
import_kernel_nv(char * name,int for_emulator)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
export_kernel_boot_props(void)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
process_kernel_cmdline(void)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
property_service_init_action(int nargs,char ** args)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
signal_init_action(int nargs,char ** args)702 static int signal_init_action(int nargs, char **args)
703 {
704 signal_init();
705 return 0;
706 }
707
check_startup_action(int nargs,char ** args)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
queue_property_triggers_action(int nargs,char ** args)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
bootchart_init_action(int nargs,char ** args)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
selinux_android_prop_context_handle(void)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
selinux_init_all_handles(void)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
selinux_reload_policy(void)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
audit_callback(void * data,security_class_t cls,char * buf,size_t len)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
main(int argc,char ** argv)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