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 <sys/personality.h>
35
36#ifdef HAVE_SELINUX
37#include <selinux/selinux.h>
38#include <selinux/label.h>
39#include <selinux/android.h>
40#endif
41
42#include <libgen.h>
43
44#include <cutils/list.h>
45#include <cutils/sockets.h>
46#include <cutils/iosched_policy.h>
47#include <private/android_filesystem_config.h>
48#include <termios.h>
49
50#include <sys/system_properties.h>
51
52#include "devices.h"
53#include "init.h"
54#include "log.h"
55#include "property_service.h"
56#include "bootchart.h"
57#include "signal_handler.h"
58#include "keychords.h"
59#include "init_parser.h"
60#include "util.h"
61#include "ueventd.h"
62#include "watchdogd.h"
63
64#ifdef HAVE_SELINUX
65struct selabel_handle *sehandle;
66struct selabel_handle *sehandle_prop;
67#endif
68
69static int property_triggers_enabled = 0;
70
71#if BOOTCHART
72static int   bootchart_count;
73#endif
74
75static char console[32];
76static char bootmode[32];
77static char hardware[32];
78static unsigned revision = 0;
79static char qemu[32];
80
81#ifdef HAVE_SELINUX
82static int selinux_enabled = 1;
83#endif
84
85static struct action *cur_action = NULL;
86static struct command *cur_command = NULL;
87static struct listnode *command_queue = NULL;
88
89void notify_service_state(const char *name, const char *state)
90{
91    char pname[PROP_NAME_MAX];
92    int len = strlen(name);
93    if ((len + 10) > PROP_NAME_MAX)
94        return;
95    snprintf(pname, sizeof(pname), "init.svc.%s", name);
96    property_set(pname, state);
97}
98
99static int have_console;
100static char *console_name = "/dev/console";
101static time_t process_needs_restart;
102
103static const char *ENV[32];
104
105/* add_environment - add "key=value" to the current environment */
106int add_environment(const char *key, const char *val)
107{
108    int n;
109
110    for (n = 0; n < 31; n++) {
111        if (!ENV[n]) {
112            size_t len = strlen(key) + strlen(val) + 2;
113            char *entry = malloc(len);
114            snprintf(entry, len, "%s=%s", key, val);
115            ENV[n] = entry;
116            return 0;
117        }
118    }
119
120    return 1;
121}
122
123static void zap_stdio(void)
124{
125    int fd;
126    fd = open("/dev/null", O_RDWR);
127    dup2(fd, 0);
128    dup2(fd, 1);
129    dup2(fd, 2);
130    close(fd);
131}
132
133static void open_console()
134{
135    int fd;
136    if ((fd = open(console_name, O_RDWR)) < 0) {
137        fd = open("/dev/null", O_RDWR);
138    }
139    ioctl(fd, TIOCSCTTY, 0);
140    dup2(fd, 0);
141    dup2(fd, 1);
142    dup2(fd, 2);
143    close(fd);
144}
145
146static void publish_socket(const char *name, int fd)
147{
148    char key[64] = ANDROID_SOCKET_ENV_PREFIX;
149    char val[64];
150
151    strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
152            name,
153            sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
154    snprintf(val, sizeof(val), "%d", fd);
155    add_environment(key, val);
156
157    /* make sure we don't close-on-exec */
158    fcntl(fd, F_SETFD, 0);
159}
160
161void service_start(struct service *svc, const char *dynamic_args)
162{
163    struct stat s;
164    pid_t pid;
165    int needs_console;
166    int n;
167#ifdef HAVE_SELINUX
168    char *scon = NULL;
169    int rc;
170#endif
171        /* starting a service removes it from the disabled or reset
172         * state and immediately takes it out of the restarting
173         * state if it was in there
174         */
175    svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET));
176    svc->time_started = 0;
177
178        /* running processes require no additional work -- if
179         * they're in the process of exiting, we've ensured
180         * that they will immediately restart on exit, unless
181         * they are ONESHOT
182         */
183    if (svc->flags & SVC_RUNNING) {
184        return;
185    }
186
187    needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
188    if (needs_console && (!have_console)) {
189        ERROR("service '%s' requires console\n", svc->name);
190        svc->flags |= SVC_DISABLED;
191        return;
192    }
193
194    if (stat(svc->args[0], &s) != 0) {
195        ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
196        svc->flags |= SVC_DISABLED;
197        return;
198    }
199
200    if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) {
201        ERROR("service '%s' must be one-shot to use dynamic args, disabling\n",
202               svc->args[0]);
203        svc->flags |= SVC_DISABLED;
204        return;
205    }
206
207#ifdef HAVE_SELINUX
208    if (is_selinux_enabled() > 0) {
209        char *mycon = NULL, *fcon = NULL;
210
211        INFO("computing context for service '%s'\n", svc->args[0]);
212        rc = getcon(&mycon);
213        if (rc < 0) {
214            ERROR("could not get context while starting '%s'\n", svc->name);
215            return;
216        }
217
218        rc = getfilecon(svc->args[0], &fcon);
219        if (rc < 0) {
220            ERROR("could not get context while starting '%s'\n", svc->name);
221            freecon(mycon);
222            return;
223        }
224
225        rc = security_compute_create(mycon, fcon, string_to_security_class("process"), &scon);
226        freecon(mycon);
227        freecon(fcon);
228        if (rc < 0) {
229            ERROR("could not get context while starting '%s'\n", svc->name);
230            return;
231        }
232    }
233#endif
234
235    NOTICE("starting '%s'\n", svc->name);
236
237    pid = fork();
238
239    if (pid == 0) {
240        struct socketinfo *si;
241        struct svcenvinfo *ei;
242        char tmp[32];
243        int fd, sz;
244
245        umask(077);
246#ifdef __arm__
247        /*
248         * b/7188322 - Temporarily revert to the compat memory layout
249         * to avoid breaking third party apps.
250         *
251         * THIS WILL GO AWAY IN A FUTURE ANDROID RELEASE.
252         *
253         * http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7dbaa466
254         * changes the kernel mapping from bottom up to top-down.
255         * This breaks some programs which improperly embed
256         * an out of date copy of Android's linker.
257         */
258        int current = personality(0xffffFFFF);
259        personality(current | ADDR_COMPAT_LAYOUT);
260#endif
261        if (properties_inited()) {
262            get_property_workspace(&fd, &sz);
263            sprintf(tmp, "%d,%d", dup(fd), sz);
264            add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
265        }
266
267        for (ei = svc->envvars; ei; ei = ei->next)
268            add_environment(ei->name, ei->value);
269
270#ifdef HAVE_SELINUX
271        setsockcreatecon(scon);
272#endif
273
274        for (si = svc->sockets; si; si = si->next) {
275            int socket_type = (
276                    !strcmp(si->type, "stream") ? SOCK_STREAM :
277                        (!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET));
278            int s = create_socket(si->name, socket_type,
279                                  si->perm, si->uid, si->gid);
280            if (s >= 0) {
281                publish_socket(si->name, s);
282            }
283        }
284
285#ifdef HAVE_SELINUX
286        freecon(scon);
287        scon = NULL;
288        setsockcreatecon(NULL);
289#endif
290
291        if (svc->ioprio_class != IoSchedClass_NONE) {
292            if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
293                ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
294                      getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
295            }
296        }
297
298        if (needs_console) {
299            setsid();
300            open_console();
301        } else {
302            zap_stdio();
303        }
304
305#if 0
306        for (n = 0; svc->args[n]; n++) {
307            INFO("args[%d] = '%s'\n", n, svc->args[n]);
308        }
309        for (n = 0; ENV[n]; n++) {
310            INFO("env[%d] = '%s'\n", n, ENV[n]);
311        }
312#endif
313
314        setpgid(0, getpid());
315
316    /* as requested, set our gid, supplemental gids, and uid */
317        if (svc->gid) {
318            if (setgid(svc->gid) != 0) {
319                ERROR("setgid failed: %s\n", strerror(errno));
320                _exit(127);
321            }
322        }
323        if (svc->nr_supp_gids) {
324            if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) {
325                ERROR("setgroups failed: %s\n", strerror(errno));
326                _exit(127);
327            }
328        }
329        if (svc->uid) {
330            if (setuid(svc->uid) != 0) {
331                ERROR("setuid failed: %s\n", strerror(errno));
332                _exit(127);
333            }
334        }
335
336#ifdef HAVE_SELINUX
337        if (svc->seclabel) {
338            if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) {
339                ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno));
340                _exit(127);
341            }
342        }
343#endif
344
345        if (!dynamic_args) {
346            if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) {
347                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
348            }
349        } else {
350            char *arg_ptrs[INIT_PARSER_MAXARGS+1];
351            int arg_idx = svc->nargs;
352            char *tmp = strdup(dynamic_args);
353            char *next = tmp;
354            char *bword;
355
356            /* Copy the static arguments */
357            memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
358
359            while((bword = strsep(&next, " "))) {
360                arg_ptrs[arg_idx++] = bword;
361                if (arg_idx == INIT_PARSER_MAXARGS)
362                    break;
363            }
364            arg_ptrs[arg_idx] = '\0';
365            execve(svc->args[0], (char**) arg_ptrs, (char**) ENV);
366        }
367        _exit(127);
368    }
369
370#ifdef HAVE_SELINUX
371    freecon(scon);
372#endif
373
374    if (pid < 0) {
375        ERROR("failed to start '%s'\n", svc->name);
376        svc->pid = 0;
377        return;
378    }
379
380    svc->time_started = gettime();
381    svc->pid = pid;
382    svc->flags |= SVC_RUNNING;
383
384    if (properties_inited())
385        notify_service_state(svc->name, "running");
386}
387
388/* The how field should be either SVC_DISABLED or SVC_RESET */
389static void service_stop_or_reset(struct service *svc, int how)
390{
391        /* we are no longer running, nor should we
392         * attempt to restart
393         */
394    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
395
396    if ((how != SVC_DISABLED) && (how != SVC_RESET)) {
397        /* Hrm, an illegal flag.  Default to SVC_DISABLED */
398        how = SVC_DISABLED;
399    }
400        /* if the service has not yet started, prevent
401         * it from auto-starting with its class
402         */
403    if (how == SVC_RESET) {
404        svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET;
405    } else {
406        svc->flags |= how;
407    }
408
409    if (svc->pid) {
410        NOTICE("service '%s' is being killed\n", svc->name);
411        kill(-svc->pid, SIGKILL);
412        notify_service_state(svc->name, "stopping");
413    } else {
414        notify_service_state(svc->name, "stopped");
415    }
416}
417
418void service_reset(struct service *svc)
419{
420    service_stop_or_reset(svc, SVC_RESET);
421}
422
423void service_stop(struct service *svc)
424{
425    service_stop_or_reset(svc, SVC_DISABLED);
426}
427
428void property_changed(const char *name, const char *value)
429{
430    if (property_triggers_enabled)
431        queue_property_triggers(name, value);
432}
433
434static void restart_service_if_needed(struct service *svc)
435{
436    time_t next_start_time = svc->time_started + 5;
437
438    if (next_start_time <= gettime()) {
439        svc->flags &= (~SVC_RESTARTING);
440        service_start(svc, NULL);
441        return;
442    }
443
444    if ((next_start_time < process_needs_restart) ||
445        (process_needs_restart == 0)) {
446        process_needs_restart = next_start_time;
447    }
448}
449
450static void restart_processes()
451{
452    process_needs_restart = 0;
453    service_for_each_flags(SVC_RESTARTING,
454                           restart_service_if_needed);
455}
456
457static void msg_start(const char *name)
458{
459    struct service *svc;
460    char *tmp = NULL;
461    char *args = NULL;
462
463    if (!strchr(name, ':'))
464        svc = service_find_by_name(name);
465    else {
466        tmp = strdup(name);
467        args = strchr(tmp, ':');
468        *args = '\0';
469        args++;
470
471        svc = service_find_by_name(tmp);
472    }
473
474    if (svc) {
475        service_start(svc, args);
476    } else {
477        ERROR("no such service '%s'\n", name);
478    }
479    if (tmp)
480        free(tmp);
481}
482
483static void msg_stop(const char *name)
484{
485    struct service *svc = service_find_by_name(name);
486
487    if (svc) {
488        service_stop(svc);
489    } else {
490        ERROR("no such service '%s'\n", name);
491    }
492}
493
494void handle_control_message(const char *msg, const char *arg)
495{
496    if (!strcmp(msg,"start")) {
497        msg_start(arg);
498    } else if (!strcmp(msg,"stop")) {
499        msg_stop(arg);
500    } else if (!strcmp(msg,"restart")) {
501        msg_stop(arg);
502        msg_start(arg);
503    } else {
504        ERROR("unknown control msg '%s'\n", msg);
505    }
506}
507
508static struct command *get_first_command(struct action *act)
509{
510    struct listnode *node;
511    node = list_head(&act->commands);
512    if (!node || list_empty(&act->commands))
513        return NULL;
514
515    return node_to_item(node, struct command, clist);
516}
517
518static struct command *get_next_command(struct action *act, struct command *cmd)
519{
520    struct listnode *node;
521    node = cmd->clist.next;
522    if (!node)
523        return NULL;
524    if (node == &act->commands)
525        return NULL;
526
527    return node_to_item(node, struct command, clist);
528}
529
530static int is_last_command(struct action *act, struct command *cmd)
531{
532    return (list_tail(&act->commands) == &cmd->clist);
533}
534
535void execute_one_command(void)
536{
537    int ret;
538
539    if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
540        cur_action = action_remove_queue_head();
541        cur_command = NULL;
542        if (!cur_action)
543            return;
544        INFO("processing action %p (%s)\n", cur_action, cur_action->name);
545        cur_command = get_first_command(cur_action);
546    } else {
547        cur_command = get_next_command(cur_action, cur_command);
548    }
549
550    if (!cur_command)
551        return;
552
553    ret = cur_command->func(cur_command->nargs, cur_command->args);
554    INFO("command '%s' r=%d\n", cur_command->args[0], ret);
555}
556
557static int wait_for_coldboot_done_action(int nargs, char **args)
558{
559    int ret;
560    INFO("wait for %s\n", coldboot_done);
561    ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT);
562    if (ret)
563        ERROR("Timed out waiting for %s\n", coldboot_done);
564    return ret;
565}
566
567static int keychord_init_action(int nargs, char **args)
568{
569    keychord_init();
570    return 0;
571}
572
573static int console_init_action(int nargs, char **args)
574{
575    int fd;
576    char tmp[PROP_VALUE_MAX];
577
578    if (console[0]) {
579        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
580        console_name = strdup(tmp);
581    }
582
583    fd = open(console_name, O_RDWR);
584    if (fd >= 0)
585        have_console = 1;
586    close(fd);
587
588    if( load_565rle_image(INIT_IMAGE_FILE) ) {
589        fd = open("/dev/tty0", O_WRONLY);
590        if (fd >= 0) {
591            const char *msg;
592                msg = "\n"
593            "\n"
594            "\n"
595            "\n"
596            "\n"
597            "\n"
598            "\n"  // console is 40 cols x 30 lines
599            "\n"
600            "\n"
601            "\n"
602            "\n"
603            "\n"
604            "\n"
605            "\n"
606            "             A N D R O I D ";
607            write(fd, msg, strlen(msg));
608            close(fd);
609        }
610    }
611    return 0;
612}
613
614static void import_kernel_nv(char *name, int for_emulator)
615{
616    char *value = strchr(name, '=');
617    int name_len = strlen(name);
618
619    if (value == 0) return;
620    *value++ = 0;
621    if (name_len == 0) return;
622
623#ifdef HAVE_SELINUX
624    if (!strcmp(name,"selinux")) {
625        selinux_enabled = atoi(value);
626    }
627#endif
628
629    if (for_emulator) {
630        /* in the emulator, export any kernel option with the
631         * ro.kernel. prefix */
632        char buff[PROP_NAME_MAX];
633        int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
634
635        if (len < (int)sizeof(buff))
636            property_set( buff, value );
637        return;
638    }
639
640    if (!strcmp(name,"qemu")) {
641        strlcpy(qemu, value, sizeof(qemu));
642    } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) {
643        const char *boot_prop_name = name + 12;
644        char prop[PROP_NAME_MAX];
645        int cnt;
646
647        cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name);
648        if (cnt < PROP_NAME_MAX)
649            property_set(prop, value);
650    }
651}
652
653static void export_kernel_boot_props(void)
654{
655    char tmp[PROP_VALUE_MAX];
656    const char *pval;
657    unsigned i;
658    struct {
659        const char *src_prop;
660        const char *dest_prop;
661        const char *def_val;
662    } prop_map[] = {
663        { "ro.boot.serialno", "ro.serialno", "", },
664        { "ro.boot.mode", "ro.bootmode", "unknown", },
665        { "ro.boot.baseband", "ro.baseband", "unknown", },
666        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
667    };
668
669    for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
670        pval = property_get(prop_map[i].src_prop);
671        property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val);
672    }
673
674    pval = property_get("ro.boot.console");
675    if (pval)
676        strlcpy(console, pval, sizeof(console));
677
678    /* save a copy for init's usage during boot */
679    strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode));
680
681    /* if this was given on kernel command line, override what we read
682     * before (e.g. from /proc/cpuinfo), if anything */
683    pval = property_get("ro.boot.hardware");
684    if (pval)
685        strlcpy(hardware, pval, sizeof(hardware));
686    property_set("ro.hardware", hardware);
687
688    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
689    property_set("ro.revision", tmp);
690
691    /* TODO: these are obsolete. We should delete them */
692    if (!strcmp(bootmode,"factory"))
693        property_set("ro.factorytest", "1");
694    else if (!strcmp(bootmode,"factory2"))
695        property_set("ro.factorytest", "2");
696    else
697        property_set("ro.factorytest", "0");
698}
699
700static void process_kernel_cmdline(void)
701{
702    /* don't expose the raw commandline to nonpriv processes */
703    chmod("/proc/cmdline", 0440);
704
705    /* first pass does the common stuff, and finds if we are in qemu.
706     * second pass is only necessary for qemu to export all kernel params
707     * as props.
708     */
709    import_kernel_cmdline(0, import_kernel_nv);
710    if (qemu[0])
711        import_kernel_cmdline(1, import_kernel_nv);
712
713    /* now propogate the info given on command line to internal variables
714     * used by init as well as the current required properties
715     */
716    export_kernel_boot_props();
717}
718
719static int property_service_init_action(int nargs, char **args)
720{
721    /* read any property files on system or data and
722     * fire up the property service.  This must happen
723     * after the ro.foo properties are set above so
724     * that /data/local.prop cannot interfere with them.
725     */
726    start_property_service();
727    return 0;
728}
729
730static int signal_init_action(int nargs, char **args)
731{
732    signal_init();
733    return 0;
734}
735
736static int check_startup_action(int nargs, char **args)
737{
738    /* make sure we actually have all the pieces we need */
739    if ((get_property_set_fd() < 0) ||
740        (get_signal_fd() < 0)) {
741        ERROR("init startup failure\n");
742        exit(1);
743    }
744
745        /* signal that we hit this point */
746    unlink("/dev/.booting");
747
748    return 0;
749}
750
751static int queue_property_triggers_action(int nargs, char **args)
752{
753    queue_all_property_triggers();
754    /* enable property triggers */
755    property_triggers_enabled = 1;
756    return 0;
757}
758
759#if BOOTCHART
760static int bootchart_init_action(int nargs, char **args)
761{
762    bootchart_count = bootchart_init();
763    if (bootchart_count < 0) {
764        ERROR("bootcharting init failure\n");
765    } else if (bootchart_count > 0) {
766        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
767    } else {
768        NOTICE("bootcharting ignored\n");
769    }
770
771    return 0;
772}
773#endif
774
775#ifdef HAVE_SELINUX
776static const struct selinux_opt seopts_prop[] = {
777        { SELABEL_OPT_PATH, "/data/system/property_contexts" },
778        { SELABEL_OPT_PATH, "/property_contexts" },
779        { 0, NULL }
780};
781
782struct selabel_handle* selinux_android_prop_context_handle(void)
783{
784    int i = 0;
785    struct selabel_handle* sehandle = NULL;
786    while ((sehandle == NULL) && seopts_prop[i].value) {
787        sehandle = selabel_open(SELABEL_CTX_ANDROID_PROP, &seopts_prop[i], 1);
788        i++;
789    }
790
791    if (!sehandle) {
792        ERROR("SELinux:  Could not load property_contexts:  %s\n",
793              strerror(errno));
794        return NULL;
795    }
796    INFO("SELinux: Loaded property contexts from %s\n", seopts_prop[i - 1].value);
797    return sehandle;
798}
799
800void selinux_init_all_handles(void)
801{
802    sehandle = selinux_android_file_context_handle();
803    sehandle_prop = selinux_android_prop_context_handle();
804}
805
806int selinux_reload_policy(void)
807{
808    if (!selinux_enabled) {
809        return -1;
810    }
811
812    INFO("SELinux: Attempting to reload policy files\n");
813
814    if (selinux_android_reload_policy() == -1) {
815        return -1;
816    }
817
818    if (sehandle)
819        selabel_close(sehandle);
820
821    if (sehandle_prop)
822        selabel_close(sehandle_prop);
823
824    selinux_init_all_handles();
825    return 0;
826}
827
828int audit_callback(void *data, security_class_t cls, char *buf, size_t len)
829{
830    snprintf(buf, len, "property=%s", !data ? "NULL" : (char *)data);
831    return 0;
832}
833
834#endif
835
836int main(int argc, char **argv)
837{
838    int fd_count = 0;
839    struct pollfd ufds[4];
840    char *tmpdev;
841    char* debuggable;
842    char tmp[32];
843    int property_set_fd_init = 0;
844    int signal_fd_init = 0;
845    int keychord_fd_init = 0;
846    bool is_charger = false;
847
848    if (!strcmp(basename(argv[0]), "ueventd"))
849        return ueventd_main(argc, argv);
850
851    if (!strcmp(basename(argv[0]), "watchdogd"))
852        return watchdogd_main(argc, argv);
853
854    /* clear the umask */
855    umask(0);
856
857        /* Get the basic filesystem setup we need put
858         * together in the initramdisk on / and then we'll
859         * let the rc file figure out the rest.
860         */
861    mkdir("/dev", 0755);
862    mkdir("/proc", 0755);
863    mkdir("/sys", 0755);
864
865    mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
866    mkdir("/dev/pts", 0755);
867    mkdir("/dev/socket", 0755);
868    mount("devpts", "/dev/pts", "devpts", 0, NULL);
869    mount("proc", "/proc", "proc", 0, NULL);
870    mount("sysfs", "/sys", "sysfs", 0, NULL);
871
872        /* indicate that booting is in progress to background fw loaders, etc */
873    close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000));
874
875        /* We must have some place other than / to create the
876         * device nodes for kmsg and null, otherwise we won't
877         * be able to remount / read-only later on.
878         * Now that tmpfs is mounted on /dev, we can actually
879         * talk to the outside world.
880         */
881    open_devnull_stdio();
882    klog_init();
883    property_init();
884
885    get_hardware_name(hardware, &revision);
886
887    process_kernel_cmdline();
888
889#ifdef HAVE_SELINUX
890    union selinux_callback cb;
891    cb.func_log = klog_write;
892    selinux_set_callback(SELINUX_CB_LOG, cb);
893
894    cb.func_audit = audit_callback;
895    selinux_set_callback(SELINUX_CB_AUDIT, cb);
896
897    INFO("loading selinux policy\n");
898    if (selinux_enabled) {
899        if (selinux_android_load_policy() < 0) {
900            selinux_enabled = 0;
901            INFO("SELinux: Disabled due to failed policy load\n");
902        } else {
903            selinux_init_all_handles();
904        }
905    } else {
906        INFO("SELinux:  Disabled by command line option\n");
907    }
908    /* These directories were necessarily created before initial policy load
909     * and therefore need their security context restored to the proper value.
910     * This must happen before /dev is populated by ueventd.
911     */
912    restorecon("/dev");
913    restorecon("/dev/socket");
914#endif
915
916    is_charger = !strcmp(bootmode, "charger");
917
918    INFO("property init\n");
919    if (!is_charger)
920        property_load_boot_defaults();
921
922    INFO("reading config file\n");
923    init_parse_config_file("/init.rc");
924
925    action_for_each_trigger("early-init", action_add_queue_tail);
926
927    queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
928    queue_builtin_action(keychord_init_action, "keychord_init");
929    queue_builtin_action(console_init_action, "console_init");
930
931    /* execute all the boot actions to get us started */
932    action_for_each_trigger("init", action_add_queue_tail);
933
934    /* skip mounting filesystems in charger mode */
935    if (!is_charger) {
936        action_for_each_trigger("early-fs", action_add_queue_tail);
937        action_for_each_trigger("fs", action_add_queue_tail);
938        action_for_each_trigger("post-fs", action_add_queue_tail);
939        action_for_each_trigger("post-fs-data", action_add_queue_tail);
940    }
941
942    queue_builtin_action(property_service_init_action, "property_service_init");
943    queue_builtin_action(signal_init_action, "signal_init");
944    queue_builtin_action(check_startup_action, "check_startup");
945
946    if (is_charger) {
947        action_for_each_trigger("charger", action_add_queue_tail);
948    } else {
949        action_for_each_trigger("early-boot", action_add_queue_tail);
950        action_for_each_trigger("boot", action_add_queue_tail);
951    }
952
953        /* run all property triggers based on current state of the properties */
954    queue_builtin_action(queue_property_triggers_action, "queue_property_triggers");
955
956
957#if BOOTCHART
958    queue_builtin_action(bootchart_init_action, "bootchart_init");
959#endif
960
961    for(;;) {
962        int nr, i, timeout = -1;
963
964        execute_one_command();
965        restart_processes();
966
967        if (!property_set_fd_init && get_property_set_fd() > 0) {
968            ufds[fd_count].fd = get_property_set_fd();
969            ufds[fd_count].events = POLLIN;
970            ufds[fd_count].revents = 0;
971            fd_count++;
972            property_set_fd_init = 1;
973        }
974        if (!signal_fd_init && get_signal_fd() > 0) {
975            ufds[fd_count].fd = get_signal_fd();
976            ufds[fd_count].events = POLLIN;
977            ufds[fd_count].revents = 0;
978            fd_count++;
979            signal_fd_init = 1;
980        }
981        if (!keychord_fd_init && get_keychord_fd() > 0) {
982            ufds[fd_count].fd = get_keychord_fd();
983            ufds[fd_count].events = POLLIN;
984            ufds[fd_count].revents = 0;
985            fd_count++;
986            keychord_fd_init = 1;
987        }
988
989        if (process_needs_restart) {
990            timeout = (process_needs_restart - gettime()) * 1000;
991            if (timeout < 0)
992                timeout = 0;
993        }
994
995        if (!action_queue_empty() || cur_action)
996            timeout = 0;
997
998#if BOOTCHART
999        if (bootchart_count > 0) {
1000            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
1001                timeout = BOOTCHART_POLLING_MS;
1002            if (bootchart_step() < 0 || --bootchart_count == 0) {
1003                bootchart_finish();
1004                bootchart_count = 0;
1005            }
1006        }
1007#endif
1008
1009        nr = poll(ufds, fd_count, timeout);
1010        if (nr <= 0)
1011            continue;
1012
1013        for (i = 0; i < fd_count; i++) {
1014            if (ufds[i].revents == POLLIN) {
1015                if (ufds[i].fd == get_property_set_fd())
1016                    handle_property_set_fd();
1017                else if (ufds[i].fd == get_keychord_fd())
1018                    handle_keychord();
1019                else if (ufds[i].fd == get_signal_fd())
1020                    handle_signal();
1021            }
1022        }
1023    }
1024
1025    return 0;
1026}
1027