init.c revision 2840647b15fe91069aee02ce0e203943346bf294 
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
61struct selabel_handle *sehandle;
62struct selabel_handle *sehandle_prop;
63
64static int property_triggers_enabled = 0;
65
66#if BOOTCHART
67static int   bootchart_count;
68#endif
69
70static char console[32];
71static char bootmode[32];
72static char hardware[32];
73static unsigned revision = 0;
74static char qemu[32];
75
76static int selinux_enabled = 1;
77
78static struct action *cur_action = NULL;
79static struct command *cur_command = NULL;
80static struct listnode *command_queue = NULL;
81
82void 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
92static int have_console;
93static char *console_name = "/dev/console";
94static time_t process_needs_restart;
95
96static const char *ENV[32];
97
98/* add_environment - add "key=value" to the current environment */
99int 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
116static 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
126static 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
139static 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
154void 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        char *mycon = NULL, *fcon = NULL;
201
202        INFO("computing context for service '%s'\n", svc->args[0]);
203        rc = getcon(&mycon);
204        if (rc < 0) {
205            ERROR("could not get context while starting '%s'\n", svc->name);
206            return;
207        }
208
209        rc = getfilecon(svc->args[0], &fcon);
210        if (rc < 0) {
211            ERROR("could not get context while starting '%s'\n", svc->name);
212            freecon(mycon);
213            return;
214        }
215
216        rc = security_compute_create(mycon, fcon, string_to_security_class("process"), &scon);
217        freecon(mycon);
218        freecon(fcon);
219        if (rc < 0) {
220            ERROR("could not get context while starting '%s'\n", svc->name);
221            return;
222        }
223    }
224
225    NOTICE("starting '%s'\n", svc->name);
226
227    pid = fork();
228
229    if (pid == 0) {
230        struct socketinfo *si;
231        struct svcenvinfo *ei;
232        char tmp[32];
233        int fd, sz;
234
235        umask(077);
236        if (properties_inited()) {
237            get_property_workspace(&fd, &sz);
238            sprintf(tmp, "%d,%d", dup(fd), sz);
239            add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
240        }
241
242        for (ei = svc->envvars; ei; ei = ei->next)
243            add_environment(ei->name, ei->value);
244
245        setsockcreatecon(scon);
246
247        for (si = svc->sockets; si; si = si->next) {
248            int socket_type = (
249                    !strcmp(si->type, "stream") ? SOCK_STREAM :
250                        (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET));
251            int s = create_socket(si->name, socket_type,
252                                  si->perm, si->uid, si->gid);
253            if (s >= 0) {
254                publish_socket(si->name, s);
255            }
256        }
257
258        freecon(scon);
259        scon = NULL;
260        setsockcreatecon(NULL);
261
262        if (svc->ioprio_class != IoSchedClass_NONE) {
263            if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
264                ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
265                      getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
266            }
267        }
268
269        if (needs_console) {
270            setsid();
271            open_console();
272        } else {
273            zap_stdio();
274        }
275
276#if 0
277        for (n = 0; svc->args[n]; n++) {
278            INFO("args[%d] = '%s'\n", n, svc->args[n]);
279        }
280        for (n = 0; ENV[n]; n++) {
281            INFO("env[%d] = '%s'\n", n, ENV[n]);
282        }
283#endif
284
285        setpgid(0, getpid());
286
287    /* as requested, set our gid, supplemental gids, and uid */
288        if (svc->gid) {
289            if (setgid(svc->gid) != 0) {
290                ERROR("setgid failed: %s\n", strerror(errno));
291                _exit(127);
292            }
293        }
294        if (svc->nr_supp_gids) {
295            if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) {
296                ERROR("setgroups failed: %s\n", strerror(errno));
297                _exit(127);
298            }
299        }
300        if (svc->uid) {
301            if (setuid(svc->uid) != 0) {
302                ERROR("setuid failed: %s\n", strerror(errno));
303                _exit(127);
304            }
305        }
306        if (svc->seclabel) {
307            if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) {
308                ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno));
309                _exit(127);
310            }
311        }
312
313        if (!dynamic_args) {
314            if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) {
315                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
316            }
317        } else {
318            char *arg_ptrs[INIT_PARSER_MAXARGS+1];
319            int arg_idx = svc->nargs;
320            char *tmp = strdup(dynamic_args);
321            char *next = tmp;
322            char *bword;
323
324            /* Copy the static arguments */
325            memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
326
327            while((bword = strsep(&next, " "))) {
328                arg_ptrs[arg_idx++] = bword;
329                if (arg_idx == INIT_PARSER_MAXARGS)
330                    break;
331            }
332            arg_ptrs[arg_idx] = '\0';
333            execve(svc->args[0], (char**) arg_ptrs, (char**) ENV);
334        }
335        _exit(127);
336    }
337
338    freecon(scon);
339
340    if (pid < 0) {
341        ERROR("failed to start '%s'\n", svc->name);
342        svc->pid = 0;
343        return;
344    }
345
346    svc->time_started = gettime();
347    svc->pid = pid;
348    svc->flags |= SVC_RUNNING;
349
350    if (properties_inited())
351        notify_service_state(svc->name, "running");
352}
353
354/* The how field should be either SVC_DISABLED or SVC_RESET */
355static void service_stop_or_reset(struct service *svc, int how)
356{
357        /* we are no longer running, nor should we
358         * attempt to restart
359         */
360    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
361
362    if ((how != SVC_DISABLED) && (how != SVC_RESET)) {
363        /* Hrm, an illegal flag.  Default to SVC_DISABLED */
364        how = SVC_DISABLED;
365    }
366        /* if the service has not yet started, prevent
367         * it from auto-starting with its class
368         */
369    if (how == SVC_RESET) {
370        svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET;
371    } else {
372        svc->flags |= how;
373    }
374
375    if (svc->pid) {
376        NOTICE("service '%s' is being killed\n", svc->name);
377        kill(-svc->pid, SIGKILL);
378        notify_service_state(svc->name, "stopping");
379    } else {
380        notify_service_state(svc->name, "stopped");
381    }
382}
383
384void service_reset(struct service *svc)
385{
386    service_stop_or_reset(svc, SVC_RESET);
387}
388
389void service_stop(struct service *svc)
390{
391    service_stop_or_reset(svc, SVC_DISABLED);
392}
393
394void property_changed(const char *name, const char *value)
395{
396    if (property_triggers_enabled)
397        queue_property_triggers(name, value);
398}
399
400static void restart_service_if_needed(struct service *svc)
401{
402    time_t next_start_time = svc->time_started + 5;
403
404    if (next_start_time <= gettime()) {
405        svc->flags &= (~SVC_RESTARTING);
406        service_start(svc, NULL);
407        return;
408    }
409
410    if ((next_start_time < process_needs_restart) ||
411        (process_needs_restart == 0)) {
412        process_needs_restart = next_start_time;
413    }
414}
415
416static void restart_processes()
417{
418    process_needs_restart = 0;
419    service_for_each_flags(SVC_RESTARTING,
420                           restart_service_if_needed);
421}
422
423static void msg_start(const char *name)
424{
425    struct service *svc;
426    char *tmp = NULL;
427    char *args = NULL;
428
429    if (!strchr(name, ':'))
430        svc = service_find_by_name(name);
431    else {
432        tmp = strdup(name);
433        args = strchr(tmp, ':');
434        *args = '\0';
435        args++;
436
437        svc = service_find_by_name(tmp);
438    }
439
440    if (svc) {
441        service_start(svc, args);
442    } else {
443        ERROR("no such service '%s'\n", name);
444    }
445    if (tmp)
446        free(tmp);
447}
448
449static void msg_stop(const char *name)
450{
451    struct service *svc = service_find_by_name(name);
452
453    if (svc) {
454        service_stop(svc);
455    } else {
456        ERROR("no such service '%s'\n", name);
457    }
458}
459
460void handle_control_message(const char *msg, const char *arg)
461{
462    if (!strcmp(msg,"start")) {
463        msg_start(arg);
464    } else if (!strcmp(msg,"stop")) {
465        msg_stop(arg);
466    } else if (!strcmp(msg,"restart")) {
467        msg_stop(arg);
468        msg_start(arg);
469    } else {
470        ERROR("unknown control msg '%s'\n", msg);
471    }
472}
473
474static struct command *get_first_command(struct action *act)
475{
476    struct listnode *node;
477    node = list_head(&act->commands);
478    if (!node || list_empty(&act->commands))
479        return NULL;
480
481    return node_to_item(node, struct command, clist);
482}
483
484static struct command *get_next_command(struct action *act, struct command *cmd)
485{
486    struct listnode *node;
487    node = cmd->clist.next;
488    if (!node)
489        return NULL;
490    if (node == &act->commands)
491        return NULL;
492
493    return node_to_item(node, struct command, clist);
494}
495
496static int is_last_command(struct action *act, struct command *cmd)
497{
498    return (list_tail(&act->commands) == &cmd->clist);
499}
500
501void execute_one_command(void)
502{
503    int ret;
504
505    if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
506        cur_action = action_remove_queue_head();
507        cur_command = NULL;
508        if (!cur_action)
509            return;
510        INFO("processing action %p (%s)\n", cur_action, cur_action->name);
511        cur_command = get_first_command(cur_action);
512    } else {
513        cur_command = get_next_command(cur_action, cur_command);
514    }
515
516    if (!cur_command)
517        return;
518
519    ret = cur_command->func(cur_command->nargs, cur_command->args);
520    INFO("command '%s' r=%d\n", cur_command->args[0], ret);
521}
522
523static int wait_for_coldboot_done_action(int nargs, char **args)
524{
525    int ret;
526    INFO("wait for %s\n", coldboot_done);
527    ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT);
528    if (ret)
529        ERROR("Timed out waiting for %s\n", coldboot_done);
530    return ret;
531}
532
533static int keychord_init_action(int nargs, char **args)
534{
535    keychord_init();
536    return 0;
537}
538
539static int console_init_action(int nargs, char **args)
540{
541    int fd;
542    char tmp[PROP_VALUE_MAX];
543
544    if (console[0]) {
545        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
546        console_name = strdup(tmp);
547    }
548
549    fd = open(console_name, O_RDWR);
550    if (fd >= 0)
551        have_console = 1;
552    close(fd);
553
554    if( load_565rle_image(INIT_IMAGE_FILE) ) {
555        fd = open("/dev/tty0", O_WRONLY);
556        if (fd >= 0) {
557            const char *msg;
558                msg = "\n"
559            "\n"
560            "\n"
561            "\n"
562            "\n"
563            "\n"
564            "\n"  // console is 40 cols x 30 lines
565            "\n"
566            "\n"
567            "\n"
568            "\n"
569            "\n"
570            "\n"
571            "\n"
572            "             A N D R O I D ";
573            write(fd, msg, strlen(msg));
574            close(fd);
575        }
576    }
577    return 0;
578}
579
580static void import_kernel_nv(char *name, int for_emulator)
581{
582    char *value = strchr(name, '=');
583    int name_len = strlen(name);
584
585    if (value == 0) return;
586    *value++ = 0;
587    if (name_len == 0) return;
588
589    if (!strcmp(name,"selinux")) {
590        selinux_enabled = atoi(value);
591    }
592
593    if (for_emulator) {
594        /* in the emulator, export any kernel option with the
595         * ro.kernel. prefix */
596        char buff[PROP_NAME_MAX];
597        int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
598
599        if (len < (int)sizeof(buff))
600            property_set( buff, value );
601        return;
602    }
603
604    if (!strcmp(name,"qemu")) {
605        strlcpy(qemu, value, sizeof(qemu));
606    } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) {
607        const char *boot_prop_name = name + 12;
608        char prop[PROP_NAME_MAX];
609        int cnt;
610
611        cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name);
612        if (cnt < PROP_NAME_MAX)
613            property_set(prop, value);
614    }
615}
616
617static void export_kernel_boot_props(void)
618{
619    char tmp[PROP_VALUE_MAX];
620    const char *pval;
621    unsigned i;
622    struct {
623        const char *src_prop;
624        const char *dest_prop;
625        const char *def_val;
626    } prop_map[] = {
627        { "ro.boot.serialno", "ro.serialno", "", },
628        { "ro.boot.mode", "ro.bootmode", "unknown", },
629        { "ro.boot.baseband", "ro.baseband", "unknown", },
630        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
631    };
632
633    for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
634        pval = property_get(prop_map[i].src_prop);
635        property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val);
636    }
637
638    pval = property_get("ro.boot.console");
639    if (pval)
640        strlcpy(console, pval, sizeof(console));
641
642    /* save a copy for init's usage during boot */
643    strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode));
644
645    /* if this was given on kernel command line, override what we read
646     * before (e.g. from /proc/cpuinfo), if anything */
647    pval = property_get("ro.boot.hardware");
648    if (pval)
649        strlcpy(hardware, pval, sizeof(hardware));
650    property_set("ro.hardware", hardware);
651
652    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
653    property_set("ro.revision", tmp);
654
655    /* TODO: these are obsolete. We should delete them */
656    if (!strcmp(bootmode,"factory"))
657        property_set("ro.factorytest", "1");
658    else if (!strcmp(bootmode,"factory2"))
659        property_set("ro.factorytest", "2");
660    else
661        property_set("ro.factorytest", "0");
662}
663
664static void process_kernel_cmdline(void)
665{
666    /* don't expose the raw commandline to nonpriv processes */
667    chmod("/proc/cmdline", 0440);
668
669    /* first pass does the common stuff, and finds if we are in qemu.
670     * second pass is only necessary for qemu to export all kernel params
671     * as props.
672     */
673    import_kernel_cmdline(0, import_kernel_nv);
674    if (qemu[0])
675        import_kernel_cmdline(1, import_kernel_nv);
676
677    /* now propogate the info given on command line to internal variables
678     * used by init as well as the current required properties
679     */
680    export_kernel_boot_props();
681}
682
683static int property_service_init_action(int nargs, char **args)
684{
685    /* read any property files on system or data and
686     * fire up the property service.  This must happen
687     * after the ro.foo properties are set above so
688     * that /data/local.prop cannot interfere with them.
689     */
690    start_property_service();
691    return 0;
692}
693
694static int signal_init_action(int nargs, char **args)
695{
696    signal_init();
697    return 0;
698}
699
700static int check_startup_action(int nargs, char **args)
701{
702    /* make sure we actually have all the pieces we need */
703    if ((get_property_set_fd() < 0) ||
704        (get_signal_fd() < 0)) {
705        ERROR("init startup failure\n");
706        exit(1);
707    }
708
709        /* signal that we hit this point */
710    unlink("/dev/.booting");
711
712    return 0;
713}
714
715static int queue_property_triggers_action(int nargs, char **args)
716{
717    queue_all_property_triggers();
718    /* enable property triggers */
719    property_triggers_enabled = 1;
720    return 0;
721}
722
723#if BOOTCHART
724static int bootchart_init_action(int nargs, char **args)
725{
726    bootchart_count = bootchart_init();
727    if (bootchart_count < 0) {
728        ERROR("bootcharting init failure\n");
729    } else if (bootchart_count > 0) {
730        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
731    } else {
732        NOTICE("bootcharting ignored\n");
733    }
734
735    return 0;
736}
737#endif
738
739static const struct selinux_opt seopts_prop[] = {
740        { SELABEL_OPT_PATH, "/data/system/property_contexts" },
741        { SELABEL_OPT_PATH, "/property_contexts" },
742        { 0, NULL }
743};
744
745struct selabel_handle* selinux_android_prop_context_handle(void)
746{
747    int i = 0;
748    struct selabel_handle* sehandle = NULL;
749    while ((sehandle == NULL) && seopts_prop[i].value) {
750        sehandle = selabel_open(SELABEL_CTX_ANDROID_PROP, &seopts_prop[i], 1);
751        i++;
752    }
753
754    if (!sehandle) {
755        ERROR("SELinux:  Could not load property_contexts:  %s\n",
756              strerror(errno));
757        return NULL;
758    }
759    INFO("SELinux: Loaded property contexts from %s\n", seopts_prop[i - 1].value);
760    return sehandle;
761}
762
763void selinux_init_all_handles(void)
764{
765    sehandle = selinux_android_file_context_handle();
766    sehandle_prop = selinux_android_prop_context_handle();
767}
768
769int selinux_reload_policy(void)
770{
771    if (!selinux_enabled) {
772        return -1;
773    }
774
775    INFO("SELinux: Attempting to reload policy files\n");
776
777    if (selinux_android_reload_policy() == -1) {
778        return -1;
779    }
780
781    if (sehandle)
782        selabel_close(sehandle);
783
784    if (sehandle_prop)
785        selabel_close(sehandle_prop);
786
787    selinux_init_all_handles();
788    return 0;
789}
790
791int audit_callback(void *data, security_class_t cls, char *buf, size_t len)
792{
793    snprintf(buf, len, "property=%s", !data ? "NULL" : (char *)data);
794    return 0;
795}
796
797int main(int argc, char **argv)
798{
799    int fd_count = 0;
800    struct pollfd ufds[4];
801    char *tmpdev;
802    char* debuggable;
803    char tmp[32];
804    int property_set_fd_init = 0;
805    int signal_fd_init = 0;
806    int keychord_fd_init = 0;
807    bool is_charger = false;
808
809    if (!strcmp(basename(argv[0]), "ueventd"))
810        return ueventd_main(argc, argv);
811
812    if (!strcmp(basename(argv[0]), "watchdogd"))
813        return watchdogd_main(argc, argv);
814
815    /* clear the umask */
816    umask(0);
817
818        /* Get the basic filesystem setup we need put
819         * together in the initramdisk on / and then we'll
820         * let the rc file figure out the rest.
821         */
822    mkdir("/dev", 0755);
823    mkdir("/proc", 0755);
824    mkdir("/sys", 0755);
825
826    mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
827    mkdir("/dev/pts", 0755);
828    mkdir("/dev/socket", 0755);
829    mount("devpts", "/dev/pts", "devpts", 0, NULL);
830    mount("proc", "/proc", "proc", 0, NULL);
831    mount("sysfs", "/sys", "sysfs", 0, NULL);
832
833        /* indicate that booting is in progress to background fw loaders, etc */
834    close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000));
835
836        /* We must have some place other than / to create the
837         * device nodes for kmsg and null, otherwise we won't
838         * be able to remount / read-only later on.
839         * Now that tmpfs is mounted on /dev, we can actually
840         * talk to the outside world.
841         */
842    open_devnull_stdio();
843    klog_init();
844    property_init();
845
846    get_hardware_name(hardware, &revision);
847
848    process_kernel_cmdline();
849
850    union selinux_callback cb;
851    cb.func_log = klog_write;
852    selinux_set_callback(SELINUX_CB_LOG, cb);
853
854    cb.func_audit = audit_callback;
855    selinux_set_callback(SELINUX_CB_AUDIT, cb);
856
857    INFO("loading selinux policy\n");
858    if (selinux_enabled) {
859        if (selinux_android_load_policy() < 0) {
860            selinux_enabled = 0;
861            INFO("SELinux: Disabled due to failed policy load\n");
862        } else {
863            selinux_init_all_handles();
864        }
865    } else {
866        INFO("SELinux:  Disabled by command line option\n");
867    }
868    /* These directories were necessarily created before initial policy load
869     * and therefore need their security context restored to the proper value.
870     * This must happen before /dev is populated by ueventd.
871     */
872    restorecon("/dev");
873    restorecon("/dev/socket");
874
875    is_charger = !strcmp(bootmode, "charger");
876
877    INFO("property init\n");
878    if (!is_charger)
879        property_load_boot_defaults();
880
881    INFO("reading config file\n");
882    init_parse_config_file("/init.rc");
883
884    action_for_each_trigger("early-init", action_add_queue_tail);
885
886    queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
887    queue_builtin_action(keychord_init_action, "keychord_init");
888    queue_builtin_action(console_init_action, "console_init");
889
890    /* execute all the boot actions to get us started */
891    action_for_each_trigger("init", action_add_queue_tail);
892
893    /* skip mounting filesystems in charger mode */
894    if (!is_charger) {
895        action_for_each_trigger("early-fs", action_add_queue_tail);
896        action_for_each_trigger("fs", action_add_queue_tail);
897        action_for_each_trigger("post-fs", action_add_queue_tail);
898        action_for_each_trigger("post-fs-data", action_add_queue_tail);
899    }
900
901    queue_builtin_action(property_service_init_action, "property_service_init");
902    queue_builtin_action(signal_init_action, "signal_init");
903    queue_builtin_action(check_startup_action, "check_startup");
904
905    if (is_charger) {
906        action_for_each_trigger("charger", action_add_queue_tail);
907    } else {
908        action_for_each_trigger("early-boot", action_add_queue_tail);
909        action_for_each_trigger("boot", action_add_queue_tail);
910    }
911
912        /* run all property triggers based on current state of the properties */
913    queue_builtin_action(queue_property_triggers_action, "queue_property_triggers");
914
915
916#if BOOTCHART
917    queue_builtin_action(bootchart_init_action, "bootchart_init");
918#endif
919
920    for(;;) {
921        int nr, i, timeout = -1;
922
923        execute_one_command();
924        restart_processes();
925
926        if (!property_set_fd_init && get_property_set_fd() > 0) {
927            ufds[fd_count].fd = get_property_set_fd();
928            ufds[fd_count].events = POLLIN;
929            ufds[fd_count].revents = 0;
930            fd_count++;
931            property_set_fd_init = 1;
932        }
933        if (!signal_fd_init && get_signal_fd() > 0) {
934            ufds[fd_count].fd = get_signal_fd();
935            ufds[fd_count].events = POLLIN;
936            ufds[fd_count].revents = 0;
937            fd_count++;
938            signal_fd_init = 1;
939        }
940        if (!keychord_fd_init && get_keychord_fd() > 0) {
941            ufds[fd_count].fd = get_keychord_fd();
942            ufds[fd_count].events = POLLIN;
943            ufds[fd_count].revents = 0;
944            fd_count++;
945            keychord_fd_init = 1;
946        }
947
948        if (process_needs_restart) {
949            timeout = (process_needs_restart - gettime()) * 1000;
950            if (timeout < 0)
951                timeout = 0;
952        }
953
954        if (!action_queue_empty() || cur_action)
955            timeout = 0;
956
957#if BOOTCHART
958        if (bootchart_count > 0) {
959            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
960                timeout = BOOTCHART_POLLING_MS;
961            if (bootchart_step() < 0 || --bootchart_count == 0) {
962                bootchart_finish();
963                bootchart_count = 0;
964            }
965        }
966#endif
967
968        nr = poll(ufds, fd_count, timeout);
969        if (nr <= 0)
970            continue;
971
972        for (i = 0; i < fd_count; i++) {
973            if (ufds[i].revents == POLLIN) {
974                if (ufds[i].fd == get_property_set_fd())
975                    handle_property_set_fd();
976                else if (ufds[i].fd == get_keychord_fd())
977                    handle_keychord();
978                else if (ufds[i].fd == get_signal_fd())
979                    handle_signal();
980            }
981        }
982    }
983
984    return 0;
985}
986