init.c revision 605103fb553a8b872aa8dd0aef76ae8b3bfe47fa 
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#ifdef HAVE_SELINUX
36#include <selinux/selinux.h>
37#include <selinux/label.h>
38#include <selinux/android.h>
39#endif
40
41#include <libgen.h>
42
43#include <cutils/list.h>
44#include <cutils/sockets.h>
45#include <cutils/iosched_policy.h>
46#include <private/android_filesystem_config.h>
47#include <termios.h>
48
49#include <sys/system_properties.h>
50
51#include "devices.h"
52#include "init.h"
53#include "log.h"
54#include "property_service.h"
55#include "bootchart.h"
56#include "signal_handler.h"
57#include "keychords.h"
58#include "init_parser.h"
59#include "util.h"
60#include "ueventd.h"
61#include "watchdogd.h"
62
63#ifdef HAVE_SELINUX
64struct selabel_handle *sehandle;
65#endif
66
67static int property_triggers_enabled = 0;
68
69#if BOOTCHART
70static int   bootchart_count;
71#endif
72
73static char console[32];
74static char bootmode[32];
75static char hardware[32];
76static unsigned revision = 0;
77static char qemu[32];
78
79#ifdef HAVE_SELINUX
80static int selinux_enabled = 1;
81#endif
82
83static struct action *cur_action = NULL;
84static struct command *cur_command = NULL;
85static struct listnode *command_queue = NULL;
86
87void notify_service_state(const char *name, const char *state)
88{
89    char pname[PROP_NAME_MAX];
90    int len = strlen(name);
91    if ((len + 10) > PROP_NAME_MAX)
92        return;
93    snprintf(pname, sizeof(pname), "init.svc.%s", name);
94    property_set(pname, state);
95}
96
97static int have_console;
98static char *console_name = "/dev/console";
99static time_t process_needs_restart;
100
101static const char *ENV[32];
102
103/* add_environment - add "key=value" to the current environment */
104int add_environment(const char *key, const char *val)
105{
106    int n;
107
108    for (n = 0; n < 31; n++) {
109        if (!ENV[n]) {
110            size_t len = strlen(key) + strlen(val) + 2;
111            char *entry = malloc(len);
112            snprintf(entry, len, "%s=%s", key, val);
113            ENV[n] = entry;
114            return 0;
115        }
116    }
117
118    return 1;
119}
120
121static void zap_stdio(void)
122{
123    int fd;
124    fd = open("/dev/null", O_RDWR);
125    dup2(fd, 0);
126    dup2(fd, 1);
127    dup2(fd, 2);
128    close(fd);
129}
130
131static void open_console()
132{
133    int fd;
134    if ((fd = open(console_name, O_RDWR)) < 0) {
135        fd = open("/dev/null", O_RDWR);
136    }
137    ioctl(fd, TIOCSCTTY, 0);
138    dup2(fd, 0);
139    dup2(fd, 1);
140    dup2(fd, 2);
141    close(fd);
142}
143
144static void publish_socket(const char *name, int fd)
145{
146    char key[64] = ANDROID_SOCKET_ENV_PREFIX;
147    char val[64];
148
149    strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
150            name,
151            sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
152    snprintf(val, sizeof(val), "%d", fd);
153    add_environment(key, val);
154
155    /* make sure we don't close-on-exec */
156    fcntl(fd, F_SETFD, 0);
157}
158
159void service_start(struct service *svc, const char *dynamic_args)
160{
161    struct stat s;
162    pid_t pid;
163    int needs_console;
164    int n;
165#ifdef HAVE_SELINUX
166    char *scon = NULL;
167    int rc;
168#endif
169        /* starting a service removes it from the disabled or reset
170         * state and immediately takes it out of the restarting
171         * state if it was in there
172         */
173    svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET));
174    svc->time_started = 0;
175
176        /* running processes require no additional work -- if
177         * they're in the process of exiting, we've ensured
178         * that they will immediately restart on exit, unless
179         * they are ONESHOT
180         */
181    if (svc->flags & SVC_RUNNING) {
182        return;
183    }
184
185    needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
186    if (needs_console && (!have_console)) {
187        ERROR("service '%s' requires console\n", svc->name);
188        svc->flags |= SVC_DISABLED;
189        return;
190    }
191
192    if (stat(svc->args[0], &s) != 0) {
193        ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
194        svc->flags |= SVC_DISABLED;
195        return;
196    }
197
198    if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) {
199        ERROR("service '%s' must be one-shot to use dynamic args, disabling\n",
200               svc->args[0]);
201        svc->flags |= SVC_DISABLED;
202        return;
203    }
204
205#ifdef HAVE_SELINUX
206    if (is_selinux_enabled() > 0) {
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#endif
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#ifdef HAVE_SELINUX
254        setsockcreatecon(scon);
255#endif
256
257        for (si = svc->sockets; si; si = si->next) {
258            int socket_type = (
259                    !strcmp(si->type, "stream") ? SOCK_STREAM :
260                        (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET));
261            int s = create_socket(si->name, socket_type,
262                                  si->perm, si->uid, si->gid);
263            if (s >= 0) {
264                publish_socket(si->name, s);
265            }
266        }
267
268#ifdef HAVE_SELINUX
269        freecon(scon);
270        scon = NULL;
271        setsockcreatecon(NULL);
272#endif
273
274        if (svc->ioprio_class != IoSchedClass_NONE) {
275            if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
276                ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
277                      getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
278            }
279        }
280
281        if (needs_console) {
282            setsid();
283            open_console();
284        } else {
285            zap_stdio();
286        }
287
288#if 0
289        for (n = 0; svc->args[n]; n++) {
290            INFO("args[%d] = '%s'\n", n, svc->args[n]);
291        }
292        for (n = 0; ENV[n]; n++) {
293            INFO("env[%d] = '%s'\n", n, ENV[n]);
294        }
295#endif
296
297        setpgid(0, getpid());
298
299    /* as requested, set our gid, supplemental gids, and uid */
300        if (svc->gid) {
301            if (setgid(svc->gid) != 0) {
302                ERROR("setgid failed: %s\n", strerror(errno));
303                _exit(127);
304            }
305        }
306        if (svc->nr_supp_gids) {
307            if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) {
308                ERROR("setgroups failed: %s\n", strerror(errno));
309                _exit(127);
310            }
311        }
312        if (svc->uid) {
313            if (setuid(svc->uid) != 0) {
314                ERROR("setuid failed: %s\n", strerror(errno));
315                _exit(127);
316            }
317        }
318
319#ifdef HAVE_SELINUX
320        if (svc->seclabel) {
321            if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) {
322                ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno));
323                _exit(127);
324            }
325        }
326#endif
327
328        if (!dynamic_args) {
329            if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) {
330                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
331            }
332        } else {
333            char *arg_ptrs[INIT_PARSER_MAXARGS+1];
334            int arg_idx = svc->nargs;
335            char *tmp = strdup(dynamic_args);
336            char *next = tmp;
337            char *bword;
338
339            /* Copy the static arguments */
340            memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
341
342            while((bword = strsep(&next, " "))) {
343                arg_ptrs[arg_idx++] = bword;
344                if (arg_idx == INIT_PARSER_MAXARGS)
345                    break;
346            }
347            arg_ptrs[arg_idx] = '\0';
348            execve(svc->args[0], (char**) arg_ptrs, (char**) ENV);
349        }
350        _exit(127);
351    }
352
353#ifdef HAVE_SELINUX
354    freecon(scon);
355#endif
356
357    if (pid < 0) {
358        ERROR("failed to start '%s'\n", svc->name);
359        svc->pid = 0;
360        return;
361    }
362
363    svc->time_started = gettime();
364    svc->pid = pid;
365    svc->flags |= SVC_RUNNING;
366
367    if (properties_inited())
368        notify_service_state(svc->name, "running");
369}
370
371/* The how field should be either SVC_DISABLED or SVC_RESET */
372static void service_stop_or_reset(struct service *svc, int how)
373{
374        /* we are no longer running, nor should we
375         * attempt to restart
376         */
377    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
378
379    if ((how != SVC_DISABLED) && (how != SVC_RESET)) {
380        /* Hrm, an illegal flag.  Default to SVC_DISABLED */
381        how = SVC_DISABLED;
382    }
383        /* if the service has not yet started, prevent
384         * it from auto-starting with its class
385         */
386    if (how == SVC_RESET) {
387        svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET;
388    } else {
389        svc->flags |= how;
390    }
391
392    if (svc->pid) {
393        NOTICE("service '%s' is being killed\n", svc->name);
394        kill(-svc->pid, SIGKILL);
395        notify_service_state(svc->name, "stopping");
396    } else {
397        notify_service_state(svc->name, "stopped");
398    }
399}
400
401void service_reset(struct service *svc)
402{
403    service_stop_or_reset(svc, SVC_RESET);
404}
405
406void service_stop(struct service *svc)
407{
408    service_stop_or_reset(svc, SVC_DISABLED);
409}
410
411void property_changed(const char *name, const char *value)
412{
413    if (property_triggers_enabled)
414        queue_property_triggers(name, value);
415}
416
417static void restart_service_if_needed(struct service *svc)
418{
419    time_t next_start_time = svc->time_started + 5;
420
421    if (next_start_time <= gettime()) {
422        svc->flags &= (~SVC_RESTARTING);
423        service_start(svc, NULL);
424        return;
425    }
426
427    if ((next_start_time < process_needs_restart) ||
428        (process_needs_restart == 0)) {
429        process_needs_restart = next_start_time;
430    }
431}
432
433static void restart_processes()
434{
435    process_needs_restart = 0;
436    service_for_each_flags(SVC_RESTARTING,
437                           restart_service_if_needed);
438}
439
440static void msg_start(const char *name)
441{
442    struct service *svc;
443    char *tmp = NULL;
444    char *args = NULL;
445
446    if (!strchr(name, ':'))
447        svc = service_find_by_name(name);
448    else {
449        tmp = strdup(name);
450        args = strchr(tmp, ':');
451        *args = '\0';
452        args++;
453
454        svc = service_find_by_name(tmp);
455    }
456
457    if (svc) {
458        service_start(svc, args);
459    } else {
460        ERROR("no such service '%s'\n", name);
461    }
462    if (tmp)
463        free(tmp);
464}
465
466static void msg_stop(const char *name)
467{
468    struct service *svc = service_find_by_name(name);
469
470    if (svc) {
471        service_stop(svc);
472    } else {
473        ERROR("no such service '%s'\n", name);
474    }
475}
476
477void handle_control_message(const char *msg, const char *arg)
478{
479    if (!strcmp(msg,"start")) {
480        msg_start(arg);
481    } else if (!strcmp(msg,"stop")) {
482        msg_stop(arg);
483    } else if (!strcmp(msg,"restart")) {
484        msg_stop(arg);
485        msg_start(arg);
486    } else {
487        ERROR("unknown control msg '%s'\n", msg);
488    }
489}
490
491static struct command *get_first_command(struct action *act)
492{
493    struct listnode *node;
494    node = list_head(&act->commands);
495    if (!node || list_empty(&act->commands))
496        return NULL;
497
498    return node_to_item(node, struct command, clist);
499}
500
501static struct command *get_next_command(struct action *act, struct command *cmd)
502{
503    struct listnode *node;
504    node = cmd->clist.next;
505    if (!node)
506        return NULL;
507    if (node == &act->commands)
508        return NULL;
509
510    return node_to_item(node, struct command, clist);
511}
512
513static int is_last_command(struct action *act, struct command *cmd)
514{
515    return (list_tail(&act->commands) == &cmd->clist);
516}
517
518void execute_one_command(void)
519{
520    int ret;
521
522    if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
523        cur_action = action_remove_queue_head();
524        cur_command = NULL;
525        if (!cur_action)
526            return;
527        INFO("processing action %p (%s)\n", cur_action, cur_action->name);
528        cur_command = get_first_command(cur_action);
529    } else {
530        cur_command = get_next_command(cur_action, cur_command);
531    }
532
533    if (!cur_command)
534        return;
535
536    ret = cur_command->func(cur_command->nargs, cur_command->args);
537    INFO("command '%s' r=%d\n", cur_command->args[0], ret);
538}
539
540static int wait_for_coldboot_done_action(int nargs, char **args)
541{
542    int ret;
543    INFO("wait for %s\n", coldboot_done);
544    ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT);
545    if (ret)
546        ERROR("Timed out waiting for %s\n", coldboot_done);
547    return ret;
548}
549
550static int keychord_init_action(int nargs, char **args)
551{
552    keychord_init();
553    return 0;
554}
555
556static int console_init_action(int nargs, char **args)
557{
558    int fd;
559    char tmp[PROP_VALUE_MAX];
560
561    if (console[0]) {
562        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
563        console_name = strdup(tmp);
564    }
565
566    fd = open(console_name, O_RDWR);
567    if (fd >= 0)
568        have_console = 1;
569    close(fd);
570
571    if( load_565rle_image(INIT_IMAGE_FILE) ) {
572        fd = open("/dev/tty0", O_WRONLY);
573        if (fd >= 0) {
574            const char *msg;
575                msg = "\n"
576            "\n"
577            "\n"
578            "\n"
579            "\n"
580            "\n"
581            "\n"  // console is 40 cols x 30 lines
582            "\n"
583            "\n"
584            "\n"
585            "\n"
586            "\n"
587            "\n"
588            "\n"
589            "             A N D R O I D ";
590            write(fd, msg, strlen(msg));
591            close(fd);
592        }
593    }
594    return 0;
595}
596
597static void import_kernel_nv(char *name, int for_emulator)
598{
599    char *value = strchr(name, '=');
600    int name_len = strlen(name);
601
602    if (value == 0) return;
603    *value++ = 0;
604    if (name_len == 0) return;
605
606#ifdef HAVE_SELINUX
607    if (!strcmp(name,"selinux")) {
608        selinux_enabled = atoi(value);
609    }
610#endif
611
612    if (for_emulator) {
613        /* in the emulator, export any kernel option with the
614         * ro.kernel. prefix */
615        char buff[PROP_NAME_MAX];
616        int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
617
618        if (len < (int)sizeof(buff))
619            property_set( buff, value );
620        return;
621    }
622
623    if (!strcmp(name,"qemu")) {
624        strlcpy(qemu, value, sizeof(qemu));
625    } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) {
626        const char *boot_prop_name = name + 12;
627        char prop[PROP_NAME_MAX];
628        int cnt;
629
630        cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name);
631        if (cnt < PROP_NAME_MAX)
632            property_set(prop, value);
633    }
634}
635
636static void export_kernel_boot_props(void)
637{
638    char tmp[PROP_VALUE_MAX];
639    const char *pval;
640    unsigned i;
641    struct {
642        const char *src_prop;
643        const char *dest_prop;
644        const char *def_val;
645    } prop_map[] = {
646        { "ro.boot.serialno", "ro.serialno", "", },
647        { "ro.boot.mode", "ro.bootmode", "unknown", },
648        { "ro.boot.baseband", "ro.baseband", "unknown", },
649        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
650    };
651
652    for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
653        pval = property_get(prop_map[i].src_prop);
654        property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val);
655    }
656
657    pval = property_get("ro.boot.console");
658    if (pval)
659        strlcpy(console, pval, sizeof(console));
660
661    /* save a copy for init's usage during boot */
662    strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode));
663
664    /* if this was given on kernel command line, override what we read
665     * before (e.g. from /proc/cpuinfo), if anything */
666    pval = property_get("ro.boot.hardware");
667    if (pval)
668        strlcpy(hardware, pval, sizeof(hardware));
669    property_set("ro.hardware", hardware);
670
671    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
672    property_set("ro.revision", tmp);
673
674    /* TODO: these are obsolete. We should delete them */
675    if (!strcmp(bootmode,"factory"))
676        property_set("ro.factorytest", "1");
677    else if (!strcmp(bootmode,"factory2"))
678        property_set("ro.factorytest", "2");
679    else
680        property_set("ro.factorytest", "0");
681}
682
683static void process_kernel_cmdline(void)
684{
685    /* don't expose the raw commandline to nonpriv processes */
686    chmod("/proc/cmdline", 0440);
687
688    /* first pass does the common stuff, and finds if we are in qemu.
689     * second pass is only necessary for qemu to export all kernel params
690     * as props.
691     */
692    import_kernel_cmdline(0, import_kernel_nv);
693    if (qemu[0])
694        import_kernel_cmdline(1, import_kernel_nv);
695
696    /* now propogate the info given on command line to internal variables
697     * used by init as well as the current required properties
698     */
699    export_kernel_boot_props();
700}
701
702static int property_service_init_action(int nargs, char **args)
703{
704    /* read any property files on system or data and
705     * fire up the property service.  This must happen
706     * after the ro.foo properties are set above so
707     * that /data/local.prop cannot interfere with them.
708     */
709    start_property_service();
710    return 0;
711}
712
713static int signal_init_action(int nargs, char **args)
714{
715    signal_init();
716    return 0;
717}
718
719static int check_startup_action(int nargs, char **args)
720{
721    /* make sure we actually have all the pieces we need */
722    if ((get_property_set_fd() < 0) ||
723        (get_signal_fd() < 0)) {
724        ERROR("init startup failure\n");
725        exit(1);
726    }
727
728        /* signal that we hit this point */
729    unlink("/dev/.booting");
730
731    return 0;
732}
733
734static int queue_property_triggers_action(int nargs, char **args)
735{
736    queue_all_property_triggers();
737    /* enable property triggers */
738    property_triggers_enabled = 1;
739    return 0;
740}
741
742#if BOOTCHART
743static int bootchart_init_action(int nargs, char **args)
744{
745    bootchart_count = bootchart_init();
746    if (bootchart_count < 0) {
747        ERROR("bootcharting init failure\n");
748    } else if (bootchart_count > 0) {
749        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
750    } else {
751        NOTICE("bootcharting ignored\n");
752    }
753
754    return 0;
755}
756#endif
757
758#ifdef HAVE_SELINUX
759void selinux_init_all_handles(void)
760{
761    sehandle = selinux_android_file_context_handle();
762}
763
764int selinux_reload_policy(void)
765{
766    if (!selinux_enabled) {
767        return -1;
768    }
769
770    INFO("SELinux: Attempting to reload policy files\n");
771
772    if (selinux_android_reload_policy() == -1) {
773        return -1;
774    }
775
776    if (sehandle)
777        selabel_close(sehandle);
778
779    selinux_init_all_handles();
780    return 0;
781}
782#endif
783
784int main(int argc, char **argv)
785{
786    int fd_count = 0;
787    struct pollfd ufds[4];
788    char *tmpdev;
789    char* debuggable;
790    char tmp[32];
791    int property_set_fd_init = 0;
792    int signal_fd_init = 0;
793    int keychord_fd_init = 0;
794    bool is_charger = false;
795
796    if (!strcmp(basename(argv[0]), "ueventd"))
797        return ueventd_main(argc, argv);
798
799    if (!strcmp(basename(argv[0]), "watchdogd"))
800        return watchdogd_main(argc, argv);
801
802    /* clear the umask */
803    umask(0);
804
805        /* Get the basic filesystem setup we need put
806         * together in the initramdisk on / and then we'll
807         * let the rc file figure out the rest.
808         */
809    mkdir("/dev", 0755);
810    mkdir("/proc", 0755);
811    mkdir("/sys", 0755);
812
813    mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
814    mkdir("/dev/pts", 0755);
815    mkdir("/dev/socket", 0755);
816    mount("devpts", "/dev/pts", "devpts", 0, NULL);
817    mount("proc", "/proc", "proc", 0, NULL);
818    mount("sysfs", "/sys", "sysfs", 0, NULL);
819
820        /* indicate that booting is in progress to background fw loaders, etc */
821    close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000));
822
823        /* We must have some place other than / to create the
824         * device nodes for kmsg and null, otherwise we won't
825         * be able to remount / read-only later on.
826         * Now that tmpfs is mounted on /dev, we can actually
827         * talk to the outside world.
828         */
829    open_devnull_stdio();
830    klog_init();
831    property_init();
832
833    get_hardware_name(hardware, &revision);
834
835    process_kernel_cmdline();
836
837#ifdef HAVE_SELINUX
838    INFO("loading selinux policy\n");
839    if (selinux_enabled) {
840        if (selinux_android_load_policy() < 0) {
841            selinux_enabled = 0;
842            INFO("SELinux: Disabled due to failed policy load\n");
843        } else {
844            selinux_init_all_handles();
845        }
846    } else {
847        INFO("SELinux:  Disabled by command line option\n");
848    }
849    /* These directories were necessarily created before initial policy load
850     * and therefore need their security context restored to the proper value.
851     * This must happen before /dev is populated by ueventd.
852     */
853    restorecon("/dev");
854    restorecon("/dev/socket");
855#endif
856
857    is_charger = !strcmp(bootmode, "charger");
858
859    INFO("property init\n");
860    if (!is_charger)
861        property_load_boot_defaults();
862
863    INFO("reading config file\n");
864    init_parse_config_file("/init.rc");
865
866    action_for_each_trigger("early-init", action_add_queue_tail);
867
868    queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
869    queue_builtin_action(keychord_init_action, "keychord_init");
870    queue_builtin_action(console_init_action, "console_init");
871
872    /* execute all the boot actions to get us started */
873    action_for_each_trigger("init", action_add_queue_tail);
874
875    /* skip mounting filesystems in charger mode */
876    if (!is_charger) {
877        action_for_each_trigger("early-fs", action_add_queue_tail);
878        action_for_each_trigger("fs", action_add_queue_tail);
879        action_for_each_trigger("post-fs", action_add_queue_tail);
880        action_for_each_trigger("post-fs-data", action_add_queue_tail);
881    }
882
883    queue_builtin_action(property_service_init_action, "property_service_init");
884    queue_builtin_action(signal_init_action, "signal_init");
885    queue_builtin_action(check_startup_action, "check_startup");
886
887    if (is_charger) {
888        action_for_each_trigger("charger", action_add_queue_tail);
889    } else {
890        action_for_each_trigger("early-boot", action_add_queue_tail);
891        action_for_each_trigger("boot", action_add_queue_tail);
892    }
893
894        /* run all property triggers based on current state of the properties */
895    queue_builtin_action(queue_property_triggers_action, "queue_property_triggers");
896
897
898#if BOOTCHART
899    queue_builtin_action(bootchart_init_action, "bootchart_init");
900#endif
901
902    for(;;) {
903        int nr, i, timeout = -1;
904
905        execute_one_command();
906        restart_processes();
907
908        if (!property_set_fd_init && get_property_set_fd() > 0) {
909            ufds[fd_count].fd = get_property_set_fd();
910            ufds[fd_count].events = POLLIN;
911            ufds[fd_count].revents = 0;
912            fd_count++;
913            property_set_fd_init = 1;
914        }
915        if (!signal_fd_init && get_signal_fd() > 0) {
916            ufds[fd_count].fd = get_signal_fd();
917            ufds[fd_count].events = POLLIN;
918            ufds[fd_count].revents = 0;
919            fd_count++;
920            signal_fd_init = 1;
921        }
922        if (!keychord_fd_init && get_keychord_fd() > 0) {
923            ufds[fd_count].fd = get_keychord_fd();
924            ufds[fd_count].events = POLLIN;
925            ufds[fd_count].revents = 0;
926            fd_count++;
927            keychord_fd_init = 1;
928        }
929
930        if (process_needs_restart) {
931            timeout = (process_needs_restart - gettime()) * 1000;
932            if (timeout < 0)
933                timeout = 0;
934        }
935
936        if (!action_queue_empty() || cur_action)
937            timeout = 0;
938
939#if BOOTCHART
940        if (bootchart_count > 0) {
941            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
942                timeout = BOOTCHART_POLLING_MS;
943            if (bootchart_step() < 0 || --bootchart_count == 0) {
944                bootchart_finish();
945                bootchart_count = 0;
946            }
947        }
948#endif
949
950        nr = poll(ufds, fd_count, timeout);
951        if (nr <= 0)
952            continue;
953
954        for (i = 0; i < fd_count; i++) {
955            if (ufds[i].revents == POLLIN) {
956                if (ufds[i].fd == get_property_set_fd())
957                    handle_property_set_fd();
958                else if (ufds[i].fd == get_keychord_fd())
959                    handle_keychord();
960                else if (ufds[i].fd == get_signal_fd())
961                    handle_signal();
962            }
963        }
964    }
965
966    return 0;
967}
968