init.c revision 96d58f4f521ee4c1fef58efe5c009f1ea523d67c 
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 <time.h>
29#include <errno.h>
30#include <stdarg.h>
31#include <mtd/mtd-user.h>
32#include <sys/types.h>
33#include <sys/socket.h>
34#include <sys/un.h>
35#include <sys/reboot.h>
36
37#include <cutils/sockets.h>
38#include <termios.h>
39#include <linux/kd.h>
40#include <linux/keychord.h>
41
42#include <sys/system_properties.h>
43
44#include "devices.h"
45#include "init.h"
46#include "property_service.h"
47#include "bootchart.h"
48
49static int property_triggers_enabled = 0;
50
51#if BOOTCHART
52static int   bootchart_count;
53#endif
54
55static char console[32];
56static char serialno[32];
57static char bootmode[32];
58static char baseband[32];
59static char carrier[32];
60static char bootloader[32];
61static char hardware[32];
62static unsigned revision = 0;
63static char qemu[32];
64static struct input_keychord *keychords = 0;
65static int keychords_count = 0;
66static int keychords_length = 0;
67
68static void drain_action_queue(void);
69
70static void notify_service_state(const char *name, const char *state)
71{
72    char pname[PROP_NAME_MAX];
73    int len = strlen(name);
74    if ((len + 10) > PROP_NAME_MAX)
75        return;
76    snprintf(pname, sizeof(pname), "init.svc.%s", name);
77    property_set(pname, state);
78}
79
80static int have_console;
81static char *console_name = "/dev/console";
82static time_t process_needs_restart;
83
84static const char *ENV[32];
85
86/* add_environment - add "key=value" to the current environment */
87int add_environment(const char *key, const char *val)
88{
89    int n;
90
91    for (n = 0; n < 31; n++) {
92        if (!ENV[n]) {
93            size_t len = strlen(key) + strlen(val) + 2;
94            char *entry = malloc(len);
95            snprintf(entry, len, "%s=%s", key, val);
96            ENV[n] = entry;
97            return 0;
98        }
99    }
100
101    return 1;
102}
103
104static void zap_stdio(void)
105{
106    int fd;
107    fd = open("/dev/null", O_RDWR);
108    dup2(fd, 0);
109    dup2(fd, 1);
110    dup2(fd, 2);
111    close(fd);
112}
113
114static void open_console()
115{
116    int fd;
117    if ((fd = open(console_name, O_RDWR)) < 0) {
118        fd = open("/dev/null", O_RDWR);
119    }
120    dup2(fd, 0);
121    dup2(fd, 1);
122    dup2(fd, 2);
123    close(fd);
124}
125
126/*
127 * gettime() - returns the time in seconds of the system's monotonic clock or
128 * zero on error.
129 */
130static time_t gettime(void)
131{
132    struct timespec ts;
133    int ret;
134
135    ret = clock_gettime(CLOCK_MONOTONIC, &ts);
136    if (ret < 0) {
137        ERROR("clock_gettime(CLOCK_MONOTONIC) failed: %s\n", strerror(errno));
138        return 0;
139    }
140
141    return ts.tv_sec;
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
166        /* starting a service removes it from the disabled
167         * state and immediately takes it out of the restarting
168         * state if it was in there
169         */
170    svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING));
171    svc->time_started = 0;
172
173        /* running processes require no additional work -- if
174         * they're in the process of exiting, we've ensured
175         * that they will immediately restart on exit, unless
176         * they are ONESHOT
177         */
178    if (svc->flags & SVC_RUNNING) {
179        return;
180    }
181
182    needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
183    if (needs_console && (!have_console)) {
184        ERROR("service '%s' requires console\n", svc->name);
185        svc->flags |= SVC_DISABLED;
186        return;
187    }
188
189    if (stat(svc->args[0], &s) != 0) {
190        ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
191        svc->flags |= SVC_DISABLED;
192        return;
193    }
194
195    if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) {
196        ERROR("service '%s' must be one-shot to use dynamic args, disabling\n",
197               svc->args[0]);
198        svc->flags |= SVC_DISABLED;
199        return;
200    }
201
202    NOTICE("starting '%s'\n", svc->name);
203
204    pid = fork();
205
206    if (pid == 0) {
207        struct socketinfo *si;
208        struct svcenvinfo *ei;
209        char tmp[32];
210        int fd, sz;
211
212        get_property_workspace(&fd, &sz);
213        sprintf(tmp, "%d,%d", dup(fd), sz);
214        add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
215
216        for (ei = svc->envvars; ei; ei = ei->next)
217            add_environment(ei->name, ei->value);
218
219        for (si = svc->sockets; si; si = si->next) {
220            int s = create_socket(si->name,
221                                  !strcmp(si->type, "dgram") ?
222                                  SOCK_DGRAM : SOCK_STREAM,
223                                  si->perm, si->uid, si->gid);
224            if (s >= 0) {
225                publish_socket(si->name, s);
226            }
227        }
228
229        if (needs_console) {
230            setsid();
231            open_console();
232        } else {
233            zap_stdio();
234        }
235
236#if 0
237        for (n = 0; svc->args[n]; n++) {
238            INFO("args[%d] = '%s'\n", n, svc->args[n]);
239        }
240        for (n = 0; ENV[n]; n++) {
241            INFO("env[%d] = '%s'\n", n, ENV[n]);
242        }
243#endif
244
245        setpgid(0, getpid());
246
247    /* as requested, set our gid, supplemental gids, and uid */
248        if (svc->gid) {
249            setgid(svc->gid);
250        }
251        if (svc->nr_supp_gids) {
252            setgroups(svc->nr_supp_gids, svc->supp_gids);
253        }
254        if (svc->uid) {
255            setuid(svc->uid);
256        }
257
258        if (!dynamic_args)
259            if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0)
260                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
261        else {
262            char *arg_ptrs[SVC_MAXARGS+1];
263            int arg_idx = svc->nargs;
264            char *tmp = strdup(dynamic_args);
265            char *next = tmp;
266            char *bword;
267
268            /* Copy the static arguments */
269            memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
270
271            while((bword = strsep(&next, " "))) {
272                arg_ptrs[arg_idx++] = bword;
273                if (arg_idx == SVC_MAXARGS)
274                    break;
275            }
276            arg_ptrs[arg_idx] = '\0';
277            if (execve(svc->args[0], (char**) arg_ptrs, (char**) ENV) < 0)
278                ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
279        }
280        _exit(127);
281    }
282
283    if (pid < 0) {
284        ERROR("failed to start '%s'\n", svc->name);
285        svc->pid = 0;
286        return;
287    }
288
289    svc->time_started = gettime();
290    svc->pid = pid;
291    svc->flags |= SVC_RUNNING;
292
293    notify_service_state(svc->name, "running");
294}
295
296void service_stop(struct service *svc)
297{
298        /* we are no longer running, nor should we
299         * attempt to restart
300         */
301    svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
302
303        /* if the service has not yet started, prevent
304         * it from auto-starting with its class
305         */
306    svc->flags |= SVC_DISABLED;
307
308    if (svc->pid) {
309        NOTICE("service '%s' is being killed\n", svc->name);
310        kill(-svc->pid, SIGTERM);
311        notify_service_state(svc->name, "stopping");
312    } else {
313        notify_service_state(svc->name, "stopped");
314    }
315}
316
317void property_changed(const char *name, const char *value)
318{
319    if (property_triggers_enabled) {
320        queue_property_triggers(name, value);
321        drain_action_queue();
322    }
323}
324
325#define CRITICAL_CRASH_THRESHOLD    4       /* if we crash >4 times ... */
326#define CRITICAL_CRASH_WINDOW       (4*60)  /* ... in 4 minutes, goto recovery*/
327
328static int wait_for_one_process(int block)
329{
330    pid_t pid;
331    int status;
332    struct service *svc;
333    struct socketinfo *si;
334    time_t now;
335    struct listnode *node;
336    struct command *cmd;
337
338    while ( (pid = waitpid(-1, &status, block ? 0 : WNOHANG)) == -1 && errno == EINTR );
339    if (pid <= 0) return -1;
340    INFO("waitpid returned pid %d, status = %08x\n", pid, status);
341
342    svc = service_find_by_pid(pid);
343    if (!svc) {
344        ERROR("untracked pid %d exited\n", pid);
345        return 0;
346    }
347
348    NOTICE("process '%s', pid %d exited\n", svc->name, pid);
349
350    if (!(svc->flags & SVC_ONESHOT)) {
351        kill(-pid, SIGKILL);
352        NOTICE("process '%s' killing any children in process group\n", svc->name);
353    }
354
355    /* remove any sockets we may have created */
356    for (si = svc->sockets; si; si = si->next) {
357        char tmp[128];
358        snprintf(tmp, sizeof(tmp), ANDROID_SOCKET_DIR"/%s", si->name);
359        unlink(tmp);
360    }
361
362    svc->pid = 0;
363    svc->flags &= (~SVC_RUNNING);
364
365        /* oneshot processes go into the disabled state on exit */
366    if (svc->flags & SVC_ONESHOT) {
367        svc->flags |= SVC_DISABLED;
368    }
369
370        /* disabled processes do not get restarted automatically */
371    if (svc->flags & SVC_DISABLED) {
372        notify_service_state(svc->name, "stopped");
373        return 0;
374    }
375
376    now = gettime();
377    if (svc->flags & SVC_CRITICAL) {
378        if (svc->time_crashed + CRITICAL_CRASH_WINDOW >= now) {
379            if (++svc->nr_crashed > CRITICAL_CRASH_THRESHOLD) {
380                ERROR("critical process '%s' exited %d times in %d minutes; "
381                      "rebooting into recovery mode\n", svc->name,
382                      CRITICAL_CRASH_THRESHOLD, CRITICAL_CRASH_WINDOW / 60);
383                sync();
384                __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
385                         LINUX_REBOOT_CMD_RESTART2, "recovery");
386                return 0;
387            }
388        } else {
389            svc->time_crashed = now;
390            svc->nr_crashed = 1;
391        }
392    }
393
394    /* Execute all onrestart commands for this service. */
395    list_for_each(node, &svc->onrestart.commands) {
396        cmd = node_to_item(node, struct command, clist);
397        cmd->func(cmd->nargs, cmd->args);
398    }
399    svc->flags |= SVC_RESTARTING;
400    notify_service_state(svc->name, "restarting");
401    return 0;
402}
403
404static void restart_service_if_needed(struct service *svc)
405{
406    time_t next_start_time = svc->time_started + 5;
407
408    if (next_start_time <= gettime()) {
409        svc->flags &= (~SVC_RESTARTING);
410        service_start(svc, NULL);
411        return;
412    }
413
414    if ((next_start_time < process_needs_restart) ||
415        (process_needs_restart == 0)) {
416        process_needs_restart = next_start_time;
417    }
418}
419
420static void restart_processes()
421{
422    process_needs_restart = 0;
423    service_for_each_flags(SVC_RESTARTING,
424                           restart_service_if_needed);
425}
426
427static int signal_fd = -1;
428
429static void sigchld_handler(int s)
430{
431    write(signal_fd, &s, 1);
432}
433
434static void msg_start(const char *name)
435{
436    struct service *svc;
437    char *tmp = NULL;
438    char *args = NULL;
439
440    if (!strchr(name, ':'))
441        svc = service_find_by_name(name);
442    else {
443        tmp = strdup(name);
444        args = strchr(tmp, ':');
445        *args = '\0';
446        args++;
447
448        svc = service_find_by_name(tmp);
449    }
450
451    if (svc) {
452        service_start(svc, args);
453    } else {
454        ERROR("no such service '%s'\n", name);
455    }
456    if (tmp)
457        free(tmp);
458}
459
460static void msg_stop(const char *name)
461{
462    struct service *svc = service_find_by_name(name);
463
464    if (svc) {
465        service_stop(svc);
466    } else {
467        ERROR("no such service '%s'\n", name);
468    }
469}
470
471void handle_control_message(const char *msg, const char *arg)
472{
473    if (!strcmp(msg,"start")) {
474        msg_start(arg);
475    } else if (!strcmp(msg,"stop")) {
476        msg_stop(arg);
477    } else {
478        ERROR("unknown control msg '%s'\n", msg);
479    }
480}
481
482#define MAX_MTD_PARTITIONS 16
483
484static struct {
485    char name[16];
486    int number;
487} mtd_part_map[MAX_MTD_PARTITIONS];
488
489static int mtd_part_count = -1;
490
491static void find_mtd_partitions(void)
492{
493    int fd;
494    char buf[1024];
495    char *pmtdbufp;
496    ssize_t pmtdsize;
497    int r;
498
499    fd = open("/proc/mtd", O_RDONLY);
500    if (fd < 0)
501        return;
502
503    buf[sizeof(buf) - 1] = '\0';
504    pmtdsize = read(fd, buf, sizeof(buf) - 1);
505    pmtdbufp = buf;
506    while (pmtdsize > 0) {
507        int mtdnum, mtdsize, mtderasesize;
508        char mtdname[16];
509        mtdname[0] = '\0';
510        mtdnum = -1;
511        r = sscanf(pmtdbufp, "mtd%d: %x %x %15s",
512                   &mtdnum, &mtdsize, &mtderasesize, mtdname);
513        if ((r == 4) && (mtdname[0] == '"')) {
514            char *x = strchr(mtdname + 1, '"');
515            if (x) {
516                *x = 0;
517            }
518            INFO("mtd partition %d, %s\n", mtdnum, mtdname + 1);
519            if (mtd_part_count < MAX_MTD_PARTITIONS) {
520                strcpy(mtd_part_map[mtd_part_count].name, mtdname + 1);
521                mtd_part_map[mtd_part_count].number = mtdnum;
522                mtd_part_count++;
523            } else {
524                ERROR("too many mtd partitions\n");
525            }
526        }
527        while (pmtdsize > 0 && *pmtdbufp != '\n') {
528            pmtdbufp++;
529            pmtdsize--;
530        }
531        if (pmtdsize > 0) {
532            pmtdbufp++;
533            pmtdsize--;
534        }
535    }
536    close(fd);
537}
538
539int mtd_name_to_number(const char *name)
540{
541    int n;
542    if (mtd_part_count < 0) {
543        mtd_part_count = 0;
544        find_mtd_partitions();
545    }
546    for (n = 0; n < mtd_part_count; n++) {
547        if (!strcmp(name, mtd_part_map[n].name)) {
548            return mtd_part_map[n].number;
549        }
550    }
551    return -1;
552}
553
554static void import_kernel_nv(char *name, int in_qemu)
555{
556    char *value = strchr(name, '=');
557
558    if (value == 0) return;
559    *value++ = 0;
560    if (*name == 0) return;
561
562    if (!in_qemu)
563    {
564        /* on a real device, white-list the kernel options */
565        if (!strcmp(name,"qemu")) {
566            strlcpy(qemu, value, sizeof(qemu));
567        } else if (!strcmp(name,"androidboot.console")) {
568            strlcpy(console, value, sizeof(console));
569        } else if (!strcmp(name,"androidboot.mode")) {
570            strlcpy(bootmode, value, sizeof(bootmode));
571        } else if (!strcmp(name,"androidboot.serialno")) {
572            strlcpy(serialno, value, sizeof(serialno));
573        } else if (!strcmp(name,"androidboot.baseband")) {
574            strlcpy(baseband, value, sizeof(baseband));
575        } else if (!strcmp(name,"androidboot.carrier")) {
576            strlcpy(carrier, value, sizeof(carrier));
577        } else if (!strcmp(name,"androidboot.bootloader")) {
578            strlcpy(bootloader, value, sizeof(bootloader));
579        } else if (!strcmp(name,"androidboot.hardware")) {
580            strlcpy(hardware, value, sizeof(hardware));
581        } else {
582            qemu_cmdline(name, value);
583        }
584    } else {
585        /* in the emulator, export any kernel option with the
586         * ro.kernel. prefix */
587        char  buff[32];
588        int   len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
589        if (len < (int)sizeof(buff)) {
590            property_set( buff, value );
591        }
592    }
593}
594
595static void import_kernel_cmdline(int in_qemu)
596{
597    char cmdline[1024];
598    char *ptr;
599    int fd;
600
601    fd = open("/proc/cmdline", O_RDONLY);
602    if (fd >= 0) {
603        int n = read(fd, cmdline, 1023);
604        if (n < 0) n = 0;
605
606        /* get rid of trailing newline, it happens */
607        if (n > 0 && cmdline[n-1] == '\n') n--;
608
609        cmdline[n] = 0;
610        close(fd);
611    } else {
612        cmdline[0] = 0;
613    }
614
615    ptr = cmdline;
616    while (ptr && *ptr) {
617        char *x = strchr(ptr, ' ');
618        if (x != 0) *x++ = 0;
619        import_kernel_nv(ptr, in_qemu);
620        ptr = x;
621    }
622
623        /* don't expose the raw commandline to nonpriv processes */
624    chmod("/proc/cmdline", 0440);
625}
626
627static void get_hardware_name(void)
628{
629    char data[1024];
630    int fd, n;
631    char *x, *hw, *rev;
632
633    /* Hardware string was provided on kernel command line */
634    if (hardware[0])
635        return;
636
637    fd = open("/proc/cpuinfo", O_RDONLY);
638    if (fd < 0) return;
639
640    n = read(fd, data, 1023);
641    close(fd);
642    if (n < 0) return;
643
644    data[n] = 0;
645    hw = strstr(data, "\nHardware");
646    rev = strstr(data, "\nRevision");
647
648    if (hw) {
649        x = strstr(hw, ": ");
650        if (x) {
651            x += 2;
652            n = 0;
653            while (*x && !isspace(*x)) {
654                hardware[n++] = tolower(*x);
655                x++;
656                if (n == 31) break;
657            }
658            hardware[n] = 0;
659        }
660    }
661
662    if (rev) {
663        x = strstr(rev, ": ");
664        if (x) {
665            revision = strtoul(x + 2, 0, 16);
666        }
667    }
668}
669
670static void drain_action_queue(void)
671{
672    struct listnode *node;
673    struct command *cmd;
674    struct action *act;
675    int ret;
676
677    while ((act = action_remove_queue_head())) {
678        INFO("processing action %p (%s)\n", act, act->name);
679        list_for_each(node, &act->commands) {
680            cmd = node_to_item(node, struct command, clist);
681            ret = cmd->func(cmd->nargs, cmd->args);
682            INFO("command '%s' r=%d\n", cmd->args[0], ret);
683        }
684    }
685}
686
687void open_devnull_stdio(void)
688{
689    int fd;
690    static const char *name = "/dev/__null__";
691    if (mknod(name, S_IFCHR | 0600, (1 << 8) | 3) == 0) {
692        fd = open(name, O_RDWR);
693        unlink(name);
694        if (fd >= 0) {
695            dup2(fd, 0);
696            dup2(fd, 1);
697            dup2(fd, 2);
698            if (fd > 2) {
699                close(fd);
700            }
701            return;
702        }
703    }
704
705    exit(1);
706}
707
708void add_service_keycodes(struct service *svc)
709{
710    struct input_keychord *keychord;
711    int i, size;
712
713    if (svc->keycodes) {
714        /* add a new keychord to the list */
715        size = sizeof(*keychord) + svc->nkeycodes * sizeof(keychord->keycodes[0]);
716        keychords = realloc(keychords, keychords_length + size);
717        if (!keychords) {
718            ERROR("could not allocate keychords\n");
719            keychords_length = 0;
720            keychords_count = 0;
721            return;
722        }
723
724        keychord = (struct input_keychord *)((char *)keychords + keychords_length);
725        keychord->version = KEYCHORD_VERSION;
726        keychord->id = keychords_count + 1;
727        keychord->count = svc->nkeycodes;
728        svc->keychord_id = keychord->id;
729
730        for (i = 0; i < svc->nkeycodes; i++) {
731            keychord->keycodes[i] = svc->keycodes[i];
732        }
733        keychords_count++;
734        keychords_length += size;
735    }
736}
737
738int open_keychord()
739{
740    int fd, ret;
741
742    service_for_each(add_service_keycodes);
743
744    /* nothing to do if no services require keychords */
745    if (!keychords)
746        return -1;
747
748    fd = open("/dev/keychord", O_RDWR);
749    if (fd < 0) {
750        ERROR("could not open /dev/keychord\n");
751        return fd;
752    }
753    fcntl(fd, F_SETFD, FD_CLOEXEC);
754
755    ret = write(fd, keychords, keychords_length);
756    if (ret != keychords_length) {
757        ERROR("could not configure /dev/keychord %d (%d)\n", ret, errno);
758        close(fd);
759        fd = -1;
760    }
761
762    free(keychords);
763    keychords = 0;
764
765    return fd;
766}
767
768void handle_keychord(int fd)
769{
770    struct service *svc;
771    int ret;
772    __u16 id;
773
774    ret = read(fd, &id, sizeof(id));
775    if (ret != sizeof(id)) {
776        ERROR("could not read keychord id\n");
777        return;
778    }
779
780    svc = service_find_by_keychord(id);
781    if (svc) {
782        INFO("starting service %s from keychord\n", svc->name);
783        service_start(svc, NULL);
784    } else {
785        ERROR("service for keychord %d not found\n", id);
786    }
787}
788
789int main(int argc, char **argv)
790{
791    int device_fd = -1;
792    int property_set_fd = -1;
793    int signal_recv_fd = -1;
794    int keychord_fd = -1;
795    int fd_count;
796    int s[2];
797    int fd;
798    struct sigaction act;
799    char tmp[PROP_VALUE_MAX];
800    struct pollfd ufds[4];
801    char *tmpdev;
802    char* debuggable;
803
804    act.sa_handler = sigchld_handler;
805    act.sa_flags = SA_NOCLDSTOP;
806    act.sa_mask = 0;
807    act.sa_restorer = NULL;
808    sigaction(SIGCHLD, &act, 0);
809
810    /* clear the umask */
811    umask(0);
812
813        /* Get the basic filesystem setup we need put
814         * together in the initramdisk on / and then we'll
815         * let the rc file figure out the rest.
816         */
817    mkdir("/dev", 0755);
818    mkdir("/proc", 0755);
819    mkdir("/sys", 0755);
820
821    mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755");
822    mkdir("/dev/pts", 0755);
823    mkdir("/dev/socket", 0755);
824    mount("devpts", "/dev/pts", "devpts", 0, NULL);
825    mount("proc", "/proc", "proc", 0, NULL);
826    mount("sysfs", "/sys", "sysfs", 0, NULL);
827
828        /* We must have some place other than / to create the
829         * device nodes for kmsg and null, otherwise we won't
830         * be able to remount / read-only later on.
831         * Now that tmpfs is mounted on /dev, we can actually
832         * talk to the outside world.
833         */
834    open_devnull_stdio();
835    log_init();
836
837    INFO("reading config file\n");
838    parse_config_file("/init.rc");
839
840    /* pull the kernel commandline and ramdisk properties file in */
841    qemu_init();
842    import_kernel_cmdline(0);
843
844    get_hardware_name();
845    snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware);
846    parse_config_file(tmp);
847
848    action_for_each_trigger("early-init", action_add_queue_tail);
849    drain_action_queue();
850
851    INFO("device init\n");
852    device_fd = device_init();
853
854    property_init();
855
856    // only listen for keychords if ro.debuggable is true
857    debuggable = property_get("ro.debuggable");
858    if (debuggable && !strcmp(debuggable, "1")) {
859        keychord_fd = open_keychord();
860    }
861
862    if (console[0]) {
863        snprintf(tmp, sizeof(tmp), "/dev/%s", console);
864        console_name = strdup(tmp);
865    }
866
867    fd = open(console_name, O_RDWR);
868    if (fd >= 0)
869        have_console = 1;
870    close(fd);
871
872    if( load_565rle_image(INIT_IMAGE_FILE) ) {
873    fd = open("/dev/tty0", O_WRONLY);
874    if (fd >= 0) {
875        const char *msg;
876            msg = "\n"
877        "\n"
878        "\n"
879        "\n"
880        "\n"
881        "\n"
882        "\n"  // console is 40 cols x 30 lines
883        "\n"
884        "\n"
885        "\n"
886        "\n"
887        "\n"
888        "\n"
889        "\n"
890        "             A N D R O I D ";
891        write(fd, msg, strlen(msg));
892        close(fd);
893    }
894    }
895
896    if (qemu[0])
897        import_kernel_cmdline(1);
898
899    if (!strcmp(bootmode,"factory"))
900        property_set("ro.factorytest", "1");
901    else if (!strcmp(bootmode,"factory2"))
902        property_set("ro.factorytest", "2");
903    else
904        property_set("ro.factorytest", "0");
905
906    property_set("ro.serialno", serialno[0] ? serialno : "");
907    property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown");
908    property_set("ro.baseband", baseband[0] ? baseband : "unknown");
909    property_set("ro.carrier", carrier[0] ? carrier : "unknown");
910    property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown");
911
912    property_set("ro.hardware", hardware);
913    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
914    property_set("ro.revision", tmp);
915
916        /* execute all the boot actions to get us started */
917    action_for_each_trigger("init", action_add_queue_tail);
918    drain_action_queue();
919
920        /* read any property files on system or data and
921         * fire up the property service.  This must happen
922         * after the ro.foo properties are set above so
923         * that /data/local.prop cannot interfere with them.
924         */
925    property_set_fd = start_property_service();
926
927    /* create a signalling mechanism for the sigchld handler */
928    if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == 0) {
929        signal_fd = s[0];
930        signal_recv_fd = s[1];
931        fcntl(s[0], F_SETFD, FD_CLOEXEC);
932        fcntl(s[0], F_SETFL, O_NONBLOCK);
933        fcntl(s[1], F_SETFD, FD_CLOEXEC);
934        fcntl(s[1], F_SETFL, O_NONBLOCK);
935    }
936
937    /* make sure we actually have all the pieces we need */
938    if ((device_fd < 0) ||
939        (property_set_fd < 0) ||
940        (signal_recv_fd < 0)) {
941        ERROR("init startup failure\n");
942        return 1;
943    }
944
945    /* execute all the boot actions to get us started */
946    action_for_each_trigger("early-boot", action_add_queue_tail);
947    action_for_each_trigger("boot", action_add_queue_tail);
948    drain_action_queue();
949
950        /* run all property triggers based on current state of the properties */
951    queue_all_property_triggers();
952    drain_action_queue();
953
954        /* enable property triggers */
955    property_triggers_enabled = 1;
956
957    ufds[0].fd = device_fd;
958    ufds[0].events = POLLIN;
959    ufds[1].fd = property_set_fd;
960    ufds[1].events = POLLIN;
961    ufds[2].fd = signal_recv_fd;
962    ufds[2].events = POLLIN;
963    fd_count = 3;
964
965    if (keychord_fd > 0) {
966        ufds[3].fd = keychord_fd;
967        ufds[3].events = POLLIN;
968        fd_count++;
969    } else {
970        ufds[3].events = 0;
971        ufds[3].revents = 0;
972    }
973
974#if BOOTCHART
975    bootchart_count = bootchart_init();
976    if (bootchart_count < 0) {
977        ERROR("bootcharting init failure\n");
978    } else if (bootchart_count > 0) {
979        NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
980    } else {
981        NOTICE("bootcharting ignored\n");
982    }
983#endif
984
985    for(;;) {
986        int nr, i, timeout = -1;
987
988        for (i = 0; i < fd_count; i++)
989            ufds[i].revents = 0;
990
991        drain_action_queue();
992        restart_processes();
993
994        if (process_needs_restart) {
995            timeout = (process_needs_restart - gettime()) * 1000;
996            if (timeout < 0)
997                timeout = 0;
998        }
999
1000#if BOOTCHART
1001        if (bootchart_count > 0) {
1002            if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
1003                timeout = BOOTCHART_POLLING_MS;
1004            if (bootchart_step() < 0 || --bootchart_count == 0) {
1005                bootchart_finish();
1006                bootchart_count = 0;
1007            }
1008        }
1009#endif
1010        nr = poll(ufds, fd_count, timeout);
1011        if (nr <= 0)
1012            continue;
1013
1014        if (ufds[2].revents == POLLIN) {
1015            /* we got a SIGCHLD - reap and restart as needed */
1016            read(signal_recv_fd, tmp, sizeof(tmp));
1017            while (!wait_for_one_process(0))
1018                ;
1019            continue;
1020        }
1021
1022        if (ufds[0].revents == POLLIN)
1023            handle_device_fd(device_fd);
1024
1025        if (ufds[1].revents == POLLIN)
1026            handle_property_set_fd(property_set_fd);
1027        if (ufds[3].revents == POLLIN)
1028            handle_keychord(keychord_fd);
1029    }
1030
1031    return 0;
1032}
1033