init.c revision 469b7b2da84a62652342fd2f6006ca452cb1447d 
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 <sys/mman.h>
37#include <selinux/selinux.h>
38#include <selinux/label.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
62#ifdef HAVE_SELINUX
63struct selabel_handle *sehandle;
64#endif
65
66static int property_triggers_enabled = 0;
67
68#if BOOTCHART
69static int   bootchart_count;
70#endif
71
72static char console[32];
73static char bootmode[32];
74static char hardware[32];
75static unsigned revision = 0;
76static char qemu[32];
77
78#ifdef HAVE_SELINUX
79static int selinux_enabled = 1;
80static int selinux_enforcing = 0;
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    dup2(fd, 0);
138    dup2(fd, 1);
139    dup2(fd, 2);
140    close(fd);
141}
142
143static void publish_socket(const char *name, int fd)
144{
145    char key[64] = ANDROID_SOCKET_ENV_PREFIX;
146    char val[64];
147
148    strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
149            name,
150            sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
151    snprintf(val, sizeof(val), "%d", fd);
152    add_environment(key, val);
153
154    /* make sure we don't close-on-exec */
155    fcntl(fd, F_SETFD, 0);
156}
157
158void service_start(struct service *svc, const char *dynamic_args)
159{
160    struct stat s;
161    pid_t pid;
162    int needs_console;
163    int n;
164#ifdef HAVE_SELINUX
165    char *scon = NULL;
166    int rc;
167#endif
168        /* starting a service removes it from the disabled or reset
169         * state and immediately takes it out of the restarting
170         * state if it was in there
171         */
172    svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET));
173    svc->time_started = 0;
174
175        /* running processes require no additional work -- if
176         * they're in the process of exiting, we've ensured
177         * that they will immediately restart on exit, unless
178         * they are ONESHOT
179         */
180    if (svc->flags & SVC_RUNNING) {
181        return;
182    }
183
184    needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
185    if (needs_console && (!have_console)) {
186        ERROR("service '%s' requires console\n", svc->name);
187        svc->flags |= SVC_DISABLED;
188        return;
189    }
190
191    if (stat(svc->args[0], &s) != 0) {
192        ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
193        svc->flags |= SVC_DISABLED;
194        return;
195    }
196
197    if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) {
198        ERROR("service '%s' must be one-shot to use dynamic args, disabling\n",
199               svc->args[0]);
200        svc->flags |= SVC_DISABLED;
201        return;
202    }
203
204#ifdef HAVE_SELINUX
205    if (is_selinux_enabled() > 0) {
206        char *mycon = NULL, *fcon = NULL;
207
208        INFO("computing context for service '%s'\n", svc->args[0]);
209        rc = getcon(&mycon);
210        if (rc < 0) {
211            ERROR("could not get context while starting '%s'\n", svc->name);
212            return;
213        }
214
215        rc = getfilecon(svc->args[0], &fcon);
216        if (rc < 0) {
217            ERROR("could not get context while starting '%s'\n", svc->name);
218            freecon(mycon);
219            return;
220        }
221
222        rc = security_compute_create(mycon, fcon, string_to_security_class("process"), &scon);
223        freecon(mycon);
224        freecon(fcon);
225        if (rc < 0) {
226            ERROR("could not get context while starting '%s'\n", svc->name);
227            return;
228        }
229    }
230#endif
231
232    NOTICE("starting '%s'\n", svc->name);
233
234    pid = fork();
235
236    if (pid == 0) {
237        struct socketinfo *si;
238        struct svcenvinfo *ei;
239        char tmp[32];
240        int fd, sz;
241
242        if (properties_inited()) {
243            get_property_workspace(&fd, &sz);
244            sprintf(tmp, "%d,%d", dup(fd), sz);
245            add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
246        }
247
248        for (ei = svc->envvars; ei; ei = ei->next)
249            add_environment(ei->name, ei->value);
250
251#ifdef HAVE_SELINUX
252        setsockcreatecon(scon);
253#endif
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#ifdef HAVE_SELINUX
267        freecon(scon);
268        scon = NULL;
269        setsockcreatecon(NULL);
270#endif
271
272        if (svc->ioprio_class != IoSchedClass_NONE) {
273            if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
274                ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
275                      getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
276            }
277        }
278
279        if (needs_console) {
280            setsid();
281            open_console();
282        } else {
283            zap_stdio();
284        }
285
286#if 0
287        for (n = 0; svc->args[n]; n++) {
288            INFO("args[%d] = '%s'\n", n, svc->args[n]);
289        }
290        for (n = 0; ENV[n]; n++) {
291            INFO("env[%d] = '%s'\n", n, ENV[n]);
292        }
293#endif
294
295        setpgid(0, getpid());
296
297    /* as requested, set our gid, supplemental gids, and uid */
298        if (svc->gid) {
299            if (setgid(svc->gid) != 0) {
300                ERROR("setgid failed: %s\n", strerror(errno));
301                _exit(127);
302            }
303        }
304        if (svc->nr_supp_gids) {
305            if (setgroups(svc->nr_supp_gids, svc->supp_gids) != 0) {
306                ERROR("setgroups failed: %s\n", strerror(errno));
307                _exit(127);
308            }
309        }
310        if (svc->uid) {
311            if (setuid(svc->uid) != 0) {
312                ERROR("setuid failed: %s\n", strerror(errno));
313                _exit(127);
314            }
315        }
316
317#ifdef HAVE_SELINUX
318        if (svc->seclabel) {
319            if (is_selinux_enabled() > 0 && setexeccon(svc->seclabel) < 0) {
320                ERROR("cannot setexeccon('%s'): %s\n", svc->seclabel, strerror(errno));
321                _exit(127);
322            }
323        }
324#endif
325
326        if (!dynamic_args) {
327            if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) {
328                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
329            }
330        } else {
331            char *arg_ptrs[INIT_PARSER_MAXARGS+1];
332            int arg_idx = svc->nargs;
333            char *tmp = strdup(dynamic_args);
334            char *next = tmp;
335            char *bword;
336
337            /* Copy the static arguments */
338            memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
339
340            while((bword = strsep(&next, " "))) {
341                arg_ptrs[arg_idx++] = bword;
342                if (arg_idx == INIT_PARSER_MAXARGS)
343                    break;
344            }
345            arg_ptrs[arg_idx] = '\0';
346            execve(svc->args[0], (char**) arg_ptrs, (char**) ENV);
347        }
348        _exit(127);
349    }
350
351#ifdef HAVE_SELINUX
352    freecon(scon);
353#endif
354
355    if (pid < 0) {
356        ERROR("failed to start '%s'\n", svc->name);
357        svc->pid = 0;
358        return;
359    }
360
361    svc->time_started = gettime();
362    svc->pid = pid;
363    svc->flags |= SVC_RUNNING;
364
365    if (properties_inited())
366        notify_service_state(svc->name, "running");
367}
368
369/* The how field should be either SVC_DISABLED or SVC_RESET */
370static void service_stop_or_reset(struct service *svc, int how)
371{
372        /* we are no longer running, nor should we
373         * attempt to restart
374         */
375    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
376
377    if ((how != SVC_DISABLED) && (how != SVC_RESET)) {
378        /* Hrm, an illegal flag.  Default to SVC_DISABLED */
379        how = SVC_DISABLED;
380    }
381        /* if the service has not yet started, prevent
382         * it from auto-starting with its class
383         */
384    if (how == SVC_RESET) {
385        svc->flags |= (svc->flags & SVC_RC_DISABLED) ? SVC_DISABLED : SVC_RESET;
386    } else {
387        svc->flags |= how;
388    }
389
390    if (svc->pid) {
391        NOTICE("service '%s' is being killed\n", svc->name);
392        kill(-svc->pid, SIGKILL);
393        notify_service_state(svc->name, "stopping");
394    } else {
395        notify_service_state(svc->name, "stopped");
396    }
397}
398
399void service_reset(struct service *svc)
400{
401    service_stop_or_reset(svc, SVC_RESET);
402}
403
404void service_stop(struct service *svc)
405{
406    service_stop_or_reset(svc, SVC_DISABLED);
407}
408
409void property_changed(const char *name, const char *value)
410{
411    if (property_triggers_enabled)
412        queue_property_triggers(name, value);
413}
414
415static void restart_service_if_needed(struct service *svc)
416{
417    time_t next_start_time = svc->time_started + 5;
418
419    if (next_start_time <= gettime()) {
420        svc->flags &= (~SVC_RESTARTING);
421        service_start(svc, NULL);
422        return;
423    }
424
425    if ((next_start_time < process_needs_restart) ||
426        (process_needs_restart == 0)) {
427        process_needs_restart = next_start_time;
428    }
429}
430
431static void restart_processes()
432{
433    process_needs_restart = 0;
434    service_for_each_flags(SVC_RESTARTING,
435                           restart_service_if_needed);
436}
437
438static void msg_start(const char *name)
439{
440    struct service *svc;
441    char *tmp = NULL;
442    char *args = NULL;
443
444    if (!strchr(name, ':'))
445        svc = service_find_by_name(name);
446    else {
447        tmp = strdup(name);
448        args = strchr(tmp, ':');
449        *args = '\0';
450        args++;
451
452        svc = service_find_by_name(tmp);
453    }
454
455    if (svc) {
456        service_start(svc, args);
457    } else {
458        ERROR("no such service '%s'\n", name);
459    }
460    if (tmp)
461        free(tmp);
462}
463
464static void msg_stop(const char *name)
465{
466    struct service *svc = service_find_by_name(name);
467
468    if (svc) {
469        service_stop(svc);
470    } else {
471        ERROR("no such service '%s'\n", name);
472    }
473}
474
475void handle_control_message(const char *msg, const char *arg)
476{
477    if (!strcmp(msg,"start")) {
478        msg_start(arg);
479    } else if (!strcmp(msg,"stop")) {
480        msg_stop(arg);
481    } else if (!strcmp(msg,"restart")) {
482        msg_stop(arg);
483        msg_start(arg);
484    } else {
485        ERROR("unknown control msg '%s'\n", msg);
486    }
487}
488
489static struct command *get_first_command(struct action *act)
490{
491    struct listnode *node;
492    node = list_head(&act->commands);
493    if (!node || list_empty(&act->commands))
494        return NULL;
495
496    return node_to_item(node, struct command, clist);
497}
498
499static struct command *get_next_command(struct action *act, struct command *cmd)
500{
501    struct listnode *node;
502    node = cmd->clist.next;
503    if (!node)
504        return NULL;
505    if (node == &act->commands)
506        return NULL;
507
508    return node_to_item(node, struct command, clist);
509}
510
511static int is_last_command(struct action *act, struct command *cmd)
512{
513    return (list_tail(&act->commands) == &cmd->clist);
514}
515
516void execute_one_command(void)
517{
518    int ret;
519
520    if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
521        cur_action = action_remove_queue_head();
522        cur_command = NULL;
523        if (!cur_action)
524            return;
525        INFO("processing action %p (%s)\n", cur_action, cur_action->name);
526        cur_command = get_first_command(cur_action);
527    } else {
528        cur_command = get_next_command(cur_action, cur_command);
529    }
530
531    if (!cur_command)
532        return;
533
534    ret = cur_command->func(cur_command->nargs, cur_command->args);
535    INFO("command '%s' r=%d\n", cur_command->args[0], ret);
536}
537
538static int wait_for_coldboot_done_action(int nargs, char **args)
539{
540    int ret;
541    INFO("wait for %s\n", coldboot_done);
542    ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT);
543    if (ret)
544        ERROR("Timed out waiting for %s\n", coldboot_done);
545    return ret;
546}
547
548static int keychord_init_action(int nargs, char **args)
549{
550    keychord_init();
551    return 0;
552}
553
554static int console_init_action(int nargs, char **args)
555{
556    int fd;
557    char tmp[PROP_VALUE_MAX];
558
559    if (console[0]) {
560        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
561        console_name = strdup(tmp);
562    }
563
564    fd = open(console_name, O_RDWR);
565    if (fd >= 0)
566        have_console = 1;
567    close(fd);
568
569    if( load_565rle_image(INIT_IMAGE_FILE) ) {
570        fd = open("/dev/tty0", O_WRONLY);
571        if (fd >= 0) {
572            const char *msg;
573                msg = "\n"
574            "\n"
575            "\n"
576            "\n"
577            "\n"
578            "\n"
579            "\n"  // console is 40 cols x 30 lines
580            "\n"
581            "\n"
582            "\n"
583            "\n"
584            "\n"
585            "\n"
586            "\n"
587            "             A N D R O I D ";
588            write(fd, msg, strlen(msg));
589            close(fd);
590        }
591    }
592    return 0;
593}
594
595static void import_kernel_nv(char *name, int for_emulator)
596{
597    char *value = strchr(name, '=');
598    int name_len = strlen(name);
599
600    if (value == 0) return;
601    *value++ = 0;
602    if (name_len == 0) return;
603
604#ifdef HAVE_SELINUX
605    if (!strcmp(name,"enforcing")) {
606        selinux_enforcing = atoi(value);
607    } else 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.carrier", "ro.carrier", "unknown", },
650        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
651    };
652
653    for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
654        pval = property_get(prop_map[i].src_prop);
655        property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val);
656    }
657
658    pval = property_get("ro.boot.console");
659    if (pval)
660        strlcpy(console, pval, sizeof(console));
661
662    /* save a copy for init's usage during boot */
663    strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode));
664
665    /* if this was given on kernel command line, override what we read
666     * before (e.g. from /proc/cpuinfo), if anything */
667    pval = property_get("ro.boot.hardware");
668    if (pval)
669        strlcpy(hardware, pval, sizeof(hardware));
670    property_set("ro.hardware", hardware);
671
672    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
673    property_set("ro.revision", tmp);
674
675    /* TODO: these are obsolete. We should delete them */
676    if (!strcmp(bootmode,"factory"))
677        property_set("ro.factorytest", "1");
678    else if (!strcmp(bootmode,"factory2"))
679        property_set("ro.factorytest", "2");
680    else
681        property_set("ro.factorytest", "0");
682}
683
684static void process_kernel_cmdline(void)
685{
686    /* don't expose the raw commandline to nonpriv processes */
687    chmod("/proc/cmdline", 0440);
688
689    /* first pass does the common stuff, and finds if we are in qemu.
690     * second pass is only necessary for qemu to export all kernel params
691     * as props.
692     */
693    import_kernel_cmdline(0, import_kernel_nv);
694    if (qemu[0])
695        import_kernel_cmdline(1, import_kernel_nv);
696
697    /* now propogate the info given on command line to internal variables
698     * used by init as well as the current required properties
699     */
700    export_kernel_boot_props();
701}
702
703static int property_service_init_action(int nargs, char **args)
704{
705    /* read any property files on system or data and
706     * fire up the property service.  This must happen
707     * after the ro.foo properties are set above so
708     * that /data/local.prop cannot interfere with them.
709     */
710    start_property_service();
711    return 0;
712}
713
714static int signal_init_action(int nargs, char **args)
715{
716    signal_init();
717    return 0;
718}
719
720static int check_startup_action(int nargs, char **args)
721{
722    /* make sure we actually have all the pieces we need */
723    if ((get_property_set_fd() < 0) ||
724        (get_signal_fd() < 0)) {
725        ERROR("init startup failure\n");
726        exit(1);
727    }
728
729        /* signal that we hit this point */
730    unlink("/dev/.booting");
731
732    return 0;
733}
734
735static int queue_property_triggers_action(int nargs, char **args)
736{
737    queue_all_property_triggers();
738    /* enable property triggers */
739    property_triggers_enabled = 1;
740    return 0;
741}
742
743#if BOOTCHART
744static int bootchart_init_action(int nargs, char **args)
745{
746    bootchart_count = bootchart_init();
747    if (bootchart_count < 0) {
748        ERROR("bootcharting init failure\n");
749    } else if (bootchart_count > 0) {
750        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
751    } else {
752        NOTICE("bootcharting ignored\n");
753    }
754
755    return 0;
756}
757#endif
758
759#ifdef HAVE_SELINUX
760void selinux_load_policy(void)
761{
762    const char path_prefix[] = "/sepolicy";
763    struct selinux_opt seopts[] = {
764        { SELABEL_OPT_PATH, "/file_contexts" }
765    };
766    char path[PATH_MAX];
767    int fd, rc, vers;
768    struct stat sb;
769    void *map;
770
771    sehandle = NULL;
772    if (!selinux_enabled) {
773        INFO("SELinux:  Disabled by command line option\n");
774        return;
775    }
776
777    mkdir(SELINUXMNT, 0755);
778    if (mount("selinuxfs", SELINUXMNT, "selinuxfs", 0, NULL)) {
779        if (errno == ENODEV) {
780            /* SELinux not enabled in kernel */
781            return;
782        }
783        ERROR("SELinux:  Could not mount selinuxfs:  %s\n",
784              strerror(errno));
785        return;
786    }
787    set_selinuxmnt(SELINUXMNT);
788
789    vers = security_policyvers();
790    if (vers <= 0) {
791        ERROR("SELinux:  Unable to read policy version\n");
792        return;
793    }
794    INFO("SELinux:  Maximum supported policy version:  %d\n", vers);
795
796    snprintf(path, sizeof(path), "%s.%d",
797             path_prefix, vers);
798    fd = open(path, O_RDONLY);
799    while (fd < 0 && errno == ENOENT && --vers) {
800        snprintf(path, sizeof(path), "%s.%d",
801                 path_prefix, vers);
802        fd = open(path, O_RDONLY);
803    }
804    if (fd < 0) {
805        ERROR("SELinux:  Could not open %s:  %s\n",
806              path, strerror(errno));
807        return;
808    }
809    if (fstat(fd, &sb) < 0) {
810        ERROR("SELinux:  Could not stat %s:  %s\n",
811              path, strerror(errno));
812        return;
813    }
814    map = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
815    if (map == MAP_FAILED) {
816        ERROR("SELinux:  Could not map %s:  %s\n",
817              path, strerror(errno));
818        return;
819    }
820
821    rc = security_load_policy(map, sb.st_size);
822    if (rc < 0) {
823        ERROR("SELinux:  Could not load policy:  %s\n",
824              strerror(errno));
825        return;
826    }
827
828    rc = security_setenforce(selinux_enforcing);
829    if (rc < 0) {
830        ERROR("SELinux:  Could not set enforcing mode to %s:  %s\n",
831              selinux_enforcing ? "enforcing" : "permissive", strerror(errno));
832        return;
833    }
834
835    munmap(map, sb.st_size);
836    close(fd);
837    INFO("SELinux: Loaded policy from %s\n", path);
838
839    sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
840    if (!sehandle) {
841        ERROR("SELinux:  Could not load file_contexts:  %s\n",
842              strerror(errno));
843        return;
844    }
845    INFO("SELinux: Loaded file contexts from %s\n", seopts[0].value);
846    return;
847}
848#endif
849
850int main(int argc, char **argv)
851{
852    int fd_count = 0;
853    struct pollfd ufds[4];
854    char *tmpdev;
855    char* debuggable;
856    char tmp[32];
857    int property_set_fd_init = 0;
858    int signal_fd_init = 0;
859    int keychord_fd_init = 0;
860    bool is_charger = false;
861
862    if (!strcmp(basename(argv[0]), "ueventd"))
863        return ueventd_main(argc, argv);
864
865    /* clear the umask */
866    umask(0);
867
868        /* Get the basic filesystem setup we need put
869         * together in the initramdisk on / and then we'll
870         * let the rc file figure out the rest.
871         */
872    mkdir("/dev", 0755);
873    mkdir("/proc", 0755);
874    mkdir("/sys", 0755);
875
876    mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
877    mkdir("/dev/pts", 0755);
878    mkdir("/dev/socket", 0755);
879    mount("devpts", "/dev/pts", "devpts", 0, NULL);
880    mount("proc", "/proc", "proc", 0, NULL);
881    mount("sysfs", "/sys", "sysfs", 0, NULL);
882
883        /* indicate that booting is in progress to background fw loaders, etc */
884    close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000));
885
886        /* We must have some place other than / to create the
887         * device nodes for kmsg and null, otherwise we won't
888         * be able to remount / read-only later on.
889         * Now that tmpfs is mounted on /dev, we can actually
890         * talk to the outside world.
891         */
892    open_devnull_stdio();
893    klog_init();
894    property_init();
895
896    get_hardware_name(hardware, &revision);
897
898    process_kernel_cmdline();
899
900#ifdef HAVE_SELINUX
901    INFO("loading selinux policy\n");
902    selinux_load_policy();
903#endif
904
905    is_charger = !strcmp(bootmode, "charger");
906
907    INFO("property init\n");
908    if (!is_charger)
909        property_load_boot_defaults();
910
911    INFO("reading config file\n");
912    init_parse_config_file("/init.rc");
913
914    action_for_each_trigger("early-init", action_add_queue_tail);
915
916    queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
917    queue_builtin_action(keychord_init_action, "keychord_init");
918    queue_builtin_action(console_init_action, "console_init");
919
920    /* execute all the boot actions to get us started */
921    action_for_each_trigger("init", action_add_queue_tail);
922
923    /* skip mounting filesystems in charger mode */
924    if (!is_charger) {
925        action_for_each_trigger("early-fs", action_add_queue_tail);
926        action_for_each_trigger("fs", action_add_queue_tail);
927        action_for_each_trigger("post-fs", action_add_queue_tail);
928        action_for_each_trigger("post-fs-data", action_add_queue_tail);
929    }
930
931    queue_builtin_action(property_service_init_action, "property_service_init");
932    queue_builtin_action(signal_init_action, "signal_init");
933    queue_builtin_action(check_startup_action, "check_startup");
934
935    if (is_charger) {
936        action_for_each_trigger("charger", action_add_queue_tail);
937    } else {
938        action_for_each_trigger("early-boot", action_add_queue_tail);
939        action_for_each_trigger("boot", action_add_queue_tail);
940    }
941
942        /* run all property triggers based on current state of the properties */
943    queue_builtin_action(queue_property_triggers_action, "queue_property_triggers");
944
945
946#if BOOTCHART
947    queue_builtin_action(bootchart_init_action, "bootchart_init");
948#endif
949
950    for(;;) {
951        int nr, i, timeout = -1;
952
953        execute_one_command();
954        restart_processes();
955
956        if (!property_set_fd_init && get_property_set_fd() > 0) {
957            ufds[fd_count].fd = get_property_set_fd();
958            ufds[fd_count].events = POLLIN;
959            ufds[fd_count].revents = 0;
960            fd_count++;
961            property_set_fd_init = 1;
962        }
963        if (!signal_fd_init && get_signal_fd() > 0) {
964            ufds[fd_count].fd = get_signal_fd();
965            ufds[fd_count].events = POLLIN;
966            ufds[fd_count].revents = 0;
967            fd_count++;
968            signal_fd_init = 1;
969        }
970        if (!keychord_fd_init && get_keychord_fd() > 0) {
971            ufds[fd_count].fd = get_keychord_fd();
972            ufds[fd_count].events = POLLIN;
973            ufds[fd_count].revents = 0;
974            fd_count++;
975            keychord_fd_init = 1;
976        }
977
978        if (process_needs_restart) {
979            timeout = (process_needs_restart - gettime()) * 1000;
980            if (timeout < 0)
981                timeout = 0;
982        }
983
984        if (!action_queue_empty() || cur_action)
985            timeout = 0;
986
987#if BOOTCHART
988        if (bootchart_count > 0) {
989            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
990                timeout = BOOTCHART_POLLING_MS;
991            if (bootchart_step() < 0 || --bootchart_count == 0) {
992                bootchart_finish();
993                bootchart_count = 0;
994            }
995        }
996#endif
997
998        nr = poll(ufds, fd_count, timeout);
999        if (nr <= 0)
1000            continue;
1001
1002        for (i = 0; i < fd_count; i++) {
1003            if (ufds[i].revents == POLLIN) {
1004                if (ufds[i].fd == get_property_set_fd())
1005                    handle_property_set_fd();
1006                else if (ufds[i].fd == get_keychord_fd())
1007                    handle_keychord();
1008                else if (ufds[i].fd == get_signal_fd())
1009                    handle_signal();
1010            }
1011        }
1012    }
1013
1014    return 0;
1015}
1016