init.c revision 34f6d9e910824d6af22c71e6e94a8bea5cde16c8 
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    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,"enforcing")) {
608        selinux_enforcing = atoi(value);
609    } else if (!strcmp(name,"selinux")) {
610        selinux_enabled = atoi(value);
611    }
612#endif
613
614    if (for_emulator) {
615        /* in the emulator, export any kernel option with the
616         * ro.kernel. prefix */
617        char buff[PROP_NAME_MAX];
618        int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
619
620        if (len < (int)sizeof(buff))
621            property_set( buff, value );
622        return;
623    }
624
625    if (!strcmp(name,"qemu")) {
626        strlcpy(qemu, value, sizeof(qemu));
627    } else if (!strncmp(name, "androidboot.", 12) && name_len > 12) {
628        const char *boot_prop_name = name + 12;
629        char prop[PROP_NAME_MAX];
630        int cnt;
631
632        cnt = snprintf(prop, sizeof(prop), "ro.boot.%s", boot_prop_name);
633        if (cnt < PROP_NAME_MAX)
634            property_set(prop, value);
635    }
636}
637
638static void export_kernel_boot_props(void)
639{
640    char tmp[PROP_VALUE_MAX];
641    const char *pval;
642    unsigned i;
643    struct {
644        const char *src_prop;
645        const char *dest_prop;
646        const char *def_val;
647    } prop_map[] = {
648        { "ro.boot.serialno", "ro.serialno", "", },
649        { "ro.boot.mode", "ro.bootmode", "unknown", },
650        { "ro.boot.baseband", "ro.baseband", "unknown", },
651        { "ro.boot.bootloader", "ro.bootloader", "unknown", },
652    };
653
654    for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
655        pval = property_get(prop_map[i].src_prop);
656        property_set(prop_map[i].dest_prop, pval ?: prop_map[i].def_val);
657    }
658
659    pval = property_get("ro.boot.console");
660    if (pval)
661        strlcpy(console, pval, sizeof(console));
662
663    /* save a copy for init's usage during boot */
664    strlcpy(bootmode, property_get("ro.bootmode"), sizeof(bootmode));
665
666    /* if this was given on kernel command line, override what we read
667     * before (e.g. from /proc/cpuinfo), if anything */
668    pval = property_get("ro.boot.hardware");
669    if (pval)
670        strlcpy(hardware, pval, sizeof(hardware));
671    property_set("ro.hardware", hardware);
672
673    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
674    property_set("ro.revision", tmp);
675
676    /* TODO: these are obsolete. We should delete them */
677    if (!strcmp(bootmode,"factory"))
678        property_set("ro.factorytest", "1");
679    else if (!strcmp(bootmode,"factory2"))
680        property_set("ro.factorytest", "2");
681    else
682        property_set("ro.factorytest", "0");
683}
684
685static void process_kernel_cmdline(void)
686{
687    /* don't expose the raw commandline to nonpriv processes */
688    chmod("/proc/cmdline", 0440);
689
690    /* first pass does the common stuff, and finds if we are in qemu.
691     * second pass is only necessary for qemu to export all kernel params
692     * as props.
693     */
694    import_kernel_cmdline(0, import_kernel_nv);
695    if (qemu[0])
696        import_kernel_cmdline(1, import_kernel_nv);
697
698    /* now propogate the info given on command line to internal variables
699     * used by init as well as the current required properties
700     */
701    export_kernel_boot_props();
702}
703
704static int property_service_init_action(int nargs, char **args)
705{
706    /* read any property files on system or data and
707     * fire up the property service.  This must happen
708     * after the ro.foo properties are set above so
709     * that /data/local.prop cannot interfere with them.
710     */
711    start_property_service();
712    return 0;
713}
714
715static int signal_init_action(int nargs, char **args)
716{
717    signal_init();
718    return 0;
719}
720
721static int check_startup_action(int nargs, char **args)
722{
723    /* make sure we actually have all the pieces we need */
724    if ((get_property_set_fd() < 0) ||
725        (get_signal_fd() < 0)) {
726        ERROR("init startup failure\n");
727        exit(1);
728    }
729
730        /* signal that we hit this point */
731    unlink("/dev/.booting");
732
733    return 0;
734}
735
736static int queue_property_triggers_action(int nargs, char **args)
737{
738    queue_all_property_triggers();
739    /* enable property triggers */
740    property_triggers_enabled = 1;
741    return 0;
742}
743
744#if BOOTCHART
745static int bootchart_init_action(int nargs, char **args)
746{
747    bootchart_count = bootchart_init();
748    if (bootchart_count < 0) {
749        ERROR("bootcharting init failure\n");
750    } else if (bootchart_count > 0) {
751        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
752    } else {
753        NOTICE("bootcharting ignored\n");
754    }
755
756    return 0;
757}
758#endif
759
760#ifdef HAVE_SELINUX
761void selinux_load_policy(void)
762{
763    const char path_prefix[] = "/sepolicy";
764    struct selinux_opt seopts[] = {
765        { SELABEL_OPT_PATH, "/file_contexts" }
766    };
767    char path[PATH_MAX];
768    int fd, rc, vers;
769    struct stat sb;
770    void *map;
771
772    sehandle = NULL;
773    if (!selinux_enabled) {
774        INFO("SELinux:  Disabled by command line option\n");
775        return;
776    }
777
778    mkdir(SELINUXMNT, 0755);
779    if (mount("selinuxfs", SELINUXMNT, "selinuxfs", 0, NULL)) {
780        if (errno == ENODEV) {
781            /* SELinux not enabled in kernel */
782            return;
783        }
784        ERROR("SELinux:  Could not mount selinuxfs:  %s\n",
785              strerror(errno));
786        return;
787    }
788    set_selinuxmnt(SELINUXMNT);
789
790    vers = security_policyvers();
791    if (vers <= 0) {
792        ERROR("SELinux:  Unable to read policy version\n");
793        return;
794    }
795    INFO("SELinux:  Maximum supported policy version:  %d\n", vers);
796
797    snprintf(path, sizeof(path), "%s.%d",
798             path_prefix, vers);
799    fd = open(path, O_RDONLY);
800    while (fd < 0 && errno == ENOENT && --vers) {
801        snprintf(path, sizeof(path), "%s.%d",
802                 path_prefix, vers);
803        fd = open(path, O_RDONLY);
804    }
805    if (fd < 0) {
806        ERROR("SELinux:  Could not open %s:  %s\n",
807              path, strerror(errno));
808        return;
809    }
810    if (fstat(fd, &sb) < 0) {
811        ERROR("SELinux:  Could not stat %s:  %s\n",
812              path, strerror(errno));
813        return;
814    }
815    map = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
816    if (map == MAP_FAILED) {
817        ERROR("SELinux:  Could not map %s:  %s\n",
818              path, strerror(errno));
819        return;
820    }
821
822    rc = security_load_policy(map, sb.st_size);
823    if (rc < 0) {
824        ERROR("SELinux:  Could not load policy:  %s\n",
825              strerror(errno));
826        return;
827    }
828
829    rc = security_setenforce(selinux_enforcing);
830    if (rc < 0) {
831        ERROR("SELinux:  Could not set enforcing mode to %s:  %s\n",
832              selinux_enforcing ? "enforcing" : "permissive", strerror(errno));
833        return;
834    }
835
836    munmap(map, sb.st_size);
837    close(fd);
838    INFO("SELinux: Loaded policy from %s\n", path);
839
840    sehandle = selabel_open(SELABEL_CTX_FILE, seopts, 1);
841    if (!sehandle) {
842        ERROR("SELinux:  Could not load file_contexts:  %s\n",
843              strerror(errno));
844        return;
845    }
846    INFO("SELinux: Loaded file contexts from %s\n", seopts[0].value);
847    return;
848}
849#endif
850
851int main(int argc, char **argv)
852{
853    int fd_count = 0;
854    struct pollfd ufds[4];
855    char *tmpdev;
856    char* debuggable;
857    char tmp[32];
858    int property_set_fd_init = 0;
859    int signal_fd_init = 0;
860    int keychord_fd_init = 0;
861    bool is_charger = false;
862
863    if (!strcmp(basename(argv[0]), "ueventd"))
864        return ueventd_main(argc, argv);
865
866    /* clear the umask */
867    umask(0);
868
869        /* Get the basic filesystem setup we need put
870         * together in the initramdisk on / and then we'll
871         * let the rc file figure out the rest.
872         */
873    mkdir("/dev", 0755);
874    mkdir("/proc", 0755);
875    mkdir("/sys", 0755);
876
877    mount("tmpfs", "/dev", "tmpfs", MS_NOSUID, "mode=0755");
878    mkdir("/dev/pts", 0755);
879    mkdir("/dev/socket", 0755);
880    mount("devpts", "/dev/pts", "devpts", 0, NULL);
881    mount("proc", "/proc", "proc", 0, NULL);
882    mount("sysfs", "/sys", "sysfs", 0, NULL);
883
884        /* indicate that booting is in progress to background fw loaders, etc */
885    close(open("/dev/.booting", O_WRONLY | O_CREAT, 0000));
886
887        /* We must have some place other than / to create the
888         * device nodes for kmsg and null, otherwise we won't
889         * be able to remount / read-only later on.
890         * Now that tmpfs is mounted on /dev, we can actually
891         * talk to the outside world.
892         */
893    open_devnull_stdio();
894    klog_init();
895    property_init();
896
897    get_hardware_name(hardware, &revision);
898
899    process_kernel_cmdline();
900
901#ifdef HAVE_SELINUX
902    INFO("loading selinux policy\n");
903    selinux_load_policy();
904#endif
905
906    is_charger = !strcmp(bootmode, "charger");
907
908    INFO("property init\n");
909    if (!is_charger)
910        property_load_boot_defaults();
911
912    INFO("reading config file\n");
913    init_parse_config_file("/init.rc");
914
915    action_for_each_trigger("early-init", action_add_queue_tail);
916
917    queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
918    queue_builtin_action(keychord_init_action, "keychord_init");
919    queue_builtin_action(console_init_action, "console_init");
920
921    /* execute all the boot actions to get us started */
922    action_for_each_trigger("init", action_add_queue_tail);
923
924    /* skip mounting filesystems in charger mode */
925    if (!is_charger) {
926        action_for_each_trigger("early-fs", action_add_queue_tail);
927        action_for_each_trigger("fs", action_add_queue_tail);
928        action_for_each_trigger("post-fs", action_add_queue_tail);
929        action_for_each_trigger("post-fs-data", action_add_queue_tail);
930    }
931
932    queue_builtin_action(property_service_init_action, "property_service_init");
933    queue_builtin_action(signal_init_action, "signal_init");
934    queue_builtin_action(check_startup_action, "check_startup");
935
936    if (is_charger) {
937        action_for_each_trigger("charger", action_add_queue_tail);
938    } else {
939        action_for_each_trigger("early-boot", action_add_queue_tail);
940        action_for_each_trigger("boot", action_add_queue_tail);
941    }
942
943        /* run all property triggers based on current state of the properties */
944    queue_builtin_action(queue_property_triggers_action, "queue_property_triggers");
945
946
947#if BOOTCHART
948    queue_builtin_action(bootchart_init_action, "bootchart_init");
949#endif
950
951    for(;;) {
952        int nr, i, timeout = -1;
953
954        execute_one_command();
955        restart_processes();
956
957        if (!property_set_fd_init && get_property_set_fd() > 0) {
958            ufds[fd_count].fd = get_property_set_fd();
959            ufds[fd_count].events = POLLIN;
960            ufds[fd_count].revents = 0;
961            fd_count++;
962            property_set_fd_init = 1;
963        }
964        if (!signal_fd_init && get_signal_fd() > 0) {
965            ufds[fd_count].fd = get_signal_fd();
966            ufds[fd_count].events = POLLIN;
967            ufds[fd_count].revents = 0;
968            fd_count++;
969            signal_fd_init = 1;
970        }
971        if (!keychord_fd_init && get_keychord_fd() > 0) {
972            ufds[fd_count].fd = get_keychord_fd();
973            ufds[fd_count].events = POLLIN;
974            ufds[fd_count].revents = 0;
975            fd_count++;
976            keychord_fd_init = 1;
977        }
978
979        if (process_needs_restart) {
980            timeout = (process_needs_restart - gettime()) * 1000;
981            if (timeout < 0)
982                timeout = 0;
983        }
984
985        if (!action_queue_empty() || cur_action)
986            timeout = 0;
987
988#if BOOTCHART
989        if (bootchart_count > 0) {
990            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
991                timeout = BOOTCHART_POLLING_MS;
992            if (bootchart_step() < 0 || --bootchart_count == 0) {
993                bootchart_finish();
994                bootchart_count = 0;
995            }
996        }
997#endif
998
999        nr = poll(ufds, fd_count, timeout);
1000        if (nr <= 0)
1001            continue;
1002
1003        for (i = 0; i < fd_count; i++) {
1004            if (ufds[i].revents == POLLIN) {
1005                if (ufds[i].fd == get_property_set_fd())
1006                    handle_property_set_fd();
1007                else if (ufds[i].fd == get_keychord_fd())
1008                    handle_keychord();
1009                else if (ufds[i].fd == get_signal_fd())
1010                    handle_signal();
1011            }
1012        }
1013    }
1014
1015    return 0;
1016}
1017