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The Android Open Source Project9066cfe2009-03-03 19:31:44 -08001//
2// Copyright 2005 The Android Open Source Project
3//
4// Main entry point for runtime.
5//
6
7#include "ServiceManager.h"
8#include "SignalHandler.h"
9
Mathias Agopian3b4062e2009-05-31 19:13:00 -070010#include <utils/threads.h>
11#include <utils/Errors.h>
12
Mathias Agopian07952722009-05-19 19:08:10 -070013#include <binder/IPCThreadState.h>
14#include <binder/ProcessState.h>
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080015#include <utils/Log.h>
16#include <cutils/zygote.h>
17
18#include <cutils/properties.h>
19
20#include <private/utils/Static.h>
21
Marco Nelissen6b038442010-02-11 14:41:20 -080022#include <surfaceflinger/ISurfaceComposer.h>
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080023
24#include <android_runtime/AndroidRuntime.h>
25
26#include <stdlib.h>
27#include <unistd.h>
28#include <fcntl.h>
29#include <stdio.h>
30#include <string.h>
31#include <getopt.h>
32#include <signal.h>
33#include <errno.h>
34#include <sys/stat.h>
35#include <linux/capability.h>
36#include <linux/ioctl.h>
37#ifdef HAVE_ANDROID_OS
38# include <linux/android_alarm.h>
39#endif
40
41#undef LOG_TAG
42#define LOG_TAG "runtime"
43
44static const char* ZYGOTE_ARGV[] = {
45 "--setuid=1000",
46 "--setgid=1000",
47 "--setgroups=1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,3001,3002,3003",
48 /* CAP_SYS_TTY_CONFIG & CAP_SYS_RESOURCE & CAP_NET_BROADCAST &
49 * CAP_NET_ADMIN & CAP_NET_RAW & CAP_NET_BIND_SERVICE & CAP_KILL &
San Mehatca63bb72009-05-21 15:34:56 -070050 * CAP_SYS_BOOT CAP_SYS_NICE
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080051 */
San Mehatca63bb72009-05-21 15:34:56 -070052 "--capabilities=96549920,96549920",
The Android Open Source Project9066cfe2009-03-03 19:31:44 -080053 "--runtime-init",
54 "--nice-name=system_server",
55 "com.android.server.SystemServer"
56};
57
58using namespace android;
59
60extern "C" status_t system_init();
61
62enum {
63 SYSTEM_PROCESS_TAG = DEFAULT_PROCESS_TAG+1
64};
65
66extern Mutex gEventQMutex;
67extern Condition gEventQCondition;
68
69namespace android {
70
71extern status_t app_init(const char* className);
72extern void set_finish_init_func(void (*func)());
73
74
75/**
76 * This class is used to kill this process (runtime) when the system_server dies.
77 */
78class GrimReaper : public IBinder::DeathRecipient {
79public:
80 GrimReaper() { }
81
82 virtual void binderDied(const wp<IBinder>& who)
83 {
84 LOGI("Grim Reaper killing runtime...");
85 kill(getpid(), SIGKILL);
86 }
87};
88
89extern void QuickTests();
90
91/*
92 * Print usage info.
93 */
94static void usage(const char* argv0)
95{
96 fprintf(stderr,
97 "Usage: runtime [-g gamma] [-l logfile] [-n] [-s]\n"
98 " [-j app-component] [-v app-verb] [-d app-data]\n"
99 "\n"
100 "-l: File to send log messages to\n"
101 "-n: Don't print to stdout/stderr\n"
102 "-s: Force single-process mode\n"
103 "-j: Custom home app component name\n"
104 "-v: Custom home app intent verb\n"
105 "-d: Custom home app intent data\n"
106 );
107 exit(1);
108}
109
110// Selected application to run.
111static const char* gInitialApplication = NULL;
112static const char* gInitialVerb = NULL;
113static const char* gInitialData = NULL;
114
115static void writeStringToParcel(Parcel& parcel, const char* str)
116{
117 if (str) {
118 parcel.writeString16(String16(str));
119 } else {
120 parcel.writeString16(NULL, 0);
121 }
122}
123
124/*
125 * Starting point for program logic.
126 *
127 * Returns with an exit status code (0 on success, nonzero on error).
128 */
129static int run(sp<ProcessState>& proc)
130{
131 // Temporary hack to call startRunning() on the activity manager.
132 sp<IServiceManager> sm = defaultServiceManager();
133 sp<IBinder> am;
134 while ((am = sm->getService(String16("activity"))) == NULL) {
135 LOGI("Waiting for activity manager...");
136 }
137 Parcel data, reply;
138 // XXX Need to also supply a package name for this to work again.
139 // IActivityManager::getInterfaceDescriptor() is the token for invoking on this interface;
140 // hardcoding it here avoids having to link with the full Activity Manager library
141 data.writeInterfaceToken(String16("android.app.IActivityManager"));
142 writeStringToParcel(data, NULL);
143 writeStringToParcel(data, gInitialApplication);
144 writeStringToParcel(data, gInitialVerb);
145 writeStringToParcel(data, gInitialData);
146LOGI("run() sending FIRST_CALL_TRANSACTION to activity manager");
147 am->transact(IBinder::FIRST_CALL_TRANSACTION, data, &reply);
148
149 if (proc->supportsProcesses()) {
150 // Now we link to the Activity Manager waiting for it to die. If it does kill ourself.
151 // initd will restart this process and bring the system back up.
152 sp<GrimReaper> grim = new GrimReaper();
153 am->linkToDeath(grim, grim.get(), 0);
154
155 // Now join the thread pool. Note this is needed so that the message enqueued in the driver
156 // for the linkToDeath gets processed.
157 IPCThreadState::self()->joinThreadPool();
158 } else {
159 // Keep this thread running forever...
160 while (1) {
161 usleep(100000);
162 }
163 }
164 return 1;
165}
166
167
168}; // namespace android
169
170
171/*
172 * Post-system-process initialization.
173 *
174 * This function continues initialization after the system process
175 * has been initialized. It needs to be separate because the system
176 * initialization needs to care of starting the Android runtime if it is not
177 * running in its own process, which doesn't return until the runtime is
178 * being shut down. So it will call back to here from inside of Dalvik,
179 * to allow us to continue booting up.
180 */
181static void finish_system_init(sp<ProcessState>& proc)
182{
183 // If we are running multiprocess, we now need to have the
184 // thread pool started here. We don't do this in boot_init()
185 // because when running single process we need to start the
186 // thread pool after the Android runtime has been started (so
187 // the pool uses Dalvik threads).
188 if (proc->supportsProcesses()) {
189 proc->startThreadPool();
190 }
191}
192
193
194// This function can be used to enforce security to different
195// root contexts. For now, we just give every access.
196static bool contextChecker(
197 const String16& name, const sp<IBinder>& caller, void* userData)
198{
199 return true;
200}
201
202/*
203 * Initialization of boot services.
204 *
205 * This is where we perform initialization of all of our low-level
206 * boot services. Most importantly, here we become the context
207 * manager and use that to publish the service manager that will provide
208 * access to all other services.
209 */
210static void boot_init()
211{
212 LOGI("Entered boot_init()!\n");
213
214 sp<ProcessState> proc(ProcessState::self());
215 LOGD("ProcessState: %p\n", proc.get());
216 proc->becomeContextManager(contextChecker, NULL);
217
218 if (proc->supportsProcesses()) {
219 LOGI("Binder driver opened. Multiprocess enabled.\n");
220 } else {
221 LOGI("Binder driver not found. Processes not supported.\n");
222 }
223
224 sp<BServiceManager> sm = new BServiceManager;
225 proc->setContextObject(sm);
226}
227
228/*
229 * Redirect stdin/stdout/stderr to /dev/null.
230 */
231static void redirectStdFds(void)
232{
233 int fd = open("/dev/null", O_RDWR, 0);
234 if (fd < 0) {
235 LOGW("Unable to open /dev/null: %s\n", strerror(errno));
236 } else {
237 dup2(fd, 0);
238 dup2(fd, 1);
239 dup2(fd, 2);
240 close(fd);
241 }
242}
243
244static int hasDir(const char* dir)
245{
246 struct stat s;
247 int res = stat(dir, &s);
248 if (res == 0) {
249 return S_ISDIR(s.st_mode);
250 }
251 return 0;
252}
253
254static void validateTime()
255{
256#if HAVE_ANDROID_OS
257 int fd;
258 int res;
259 time_t min_time = 1167652800; // jan 1 2007, type 'date -ud "1/1 12:00" +%s' to get value for current year
260 struct timespec ts;
261
262 fd = open("/dev/alarm", O_RDWR);
263 if(fd < 0) {
264 LOGW("Unable to open alarm driver: %s\n", strerror(errno));
265 return;
266 }
267 res = ioctl(fd, ANDROID_ALARM_GET_TIME(ANDROID_ALARM_RTC_WAKEUP), &ts);
268 if(res < 0) {
269 LOGW("Unable to read rtc, %s\n", strerror(errno));
270 }
271 else if(ts.tv_sec >= min_time) {
272 goto done;
273 }
274 LOGW("Invalid time detected, %ld set to %ld\n", ts.tv_sec, min_time);
275 ts.tv_sec = min_time;
276 ts.tv_nsec = 0;
277 res = ioctl(fd, ANDROID_ALARM_SET_RTC, &ts);
278 if(res < 0) {
279 LOGW("Unable to set rtc to %ld: %s\n", ts.tv_sec, strerror(errno));
280 }
281done:
282 close(fd);
283#endif
284}
285
286#ifndef HAVE_ANDROID_OS
287class QuickRuntime : public AndroidRuntime
288{
289public:
290 QuickRuntime() {}
291
292 virtual void onStarted()
293 {
294 printf("QuickRuntime: onStarted\n");
295 }
296};
297#endif
298
299static status_t start_process(const char* name);
300
301static void restart_me(pid_t child, void* userData)
302{
303 start_process((const char*)userData);
304}
305
306static status_t start_process(const char* name)
307{
308 String8 path(name);
309 Vector<const char*> args;
310 String8 leaf(path.getPathLeaf());
311 String8 parentDir(path.getPathDir());
312 args.insertAt(leaf.string(), 0);
313 args.add(parentDir.string());
314 args.add(NULL);
315 pid_t child = fork();
316 if (child < 0) {
317 status_t err = errno;
318 LOGE("*** fork of child %s failed: %s", leaf.string(), strerror(err));
319 return -errno;
320 } else if (child == 0) {
321 LOGI("Executing: %s", path.string());
322 execv(path.string(), const_cast<char**>(args.array()));
323 int err = errno;
324 LOGE("Exec failed: %s\n", strerror(err));
325 _exit(err);
326 } else {
327 SignalHandler::setChildHandler(child, DEFAULT_PROCESS_TAG,
328 restart_me, (void*)name);
329 }
330 return -errno;
331}
332
333/*
334 * Application entry point.
335 *
336 * Parse arguments, set some values, and pass control off to Run().
337 *
338 * This is redefined to "SDL_main" on SDL simulator builds, and
339 * "runtime_main" on wxWidgets builds.
340 */
341extern "C"
342int main(int argc, char* const argv[])
343{
344 bool singleProcess = false;
345 const char* logFile = NULL;
346 int ic;
347 int result = 1;
348 pid_t systemPid;
349
350 sp<ProcessState> proc;
351
352#ifndef HAVE_ANDROID_OS
353 /* Set stdout/stderr to unbuffered for MinGW/MSYS. */
354 //setvbuf(stdout, NULL, _IONBF, 0);
355 //setvbuf(stderr, NULL, _IONBF, 0);
356
357 LOGI("commandline args:\n");
358 for (int i = 0; i < argc; i++)
359 LOGI(" %2d: '%s'\n", i, argv[i]);
360#endif
361
362 while (1) {
363 ic = getopt(argc, argv, "g:j:v:d:l:ns");
364 if (ic < 0)
365 break;
366
367 switch (ic) {
368 case 'g':
369 break;
370 case 'j':
371 gInitialApplication = optarg;
372 break;
373 case 'v':
374 gInitialVerb = optarg;
375 break;
376 case 'd':
377 gInitialData = optarg;
378 break;
379 case 'l':
380 logFile = optarg;
381 break;
382 case 'n':
383 redirectStdFds();
384 break;
385 case 's':
386 singleProcess = true;
387 break;
388 case '?':
389 default:
390 LOGE("runtime: unrecognized flag -%c\n", ic);
391 usage(argv[0]);
392 break;
393 }
394 }
395 if (optind < argc) {
396 LOGE("runtime: extra stuff: %s\n", argv[optind]);
397 usage(argv[0]);
398 }
399
400 if (singleProcess) {
401 ProcessState::setSingleProcess(true);
402 }
403
404 if (logFile != NULL) {
405 android_logToFile(NULL, logFile);
406 }
407
408 /*
409 * Set up ANDROID_* environment variables.
410 *
411 * TODO: the use of $ANDROID_PRODUCT_OUT will go away soon.
412 */
413 static const char* kSystemDir = "/system";
414 static const char* kDataDir = "/data";
415 static const char* kAppSubdir = "/app";
416 const char* out = NULL;
417#ifndef HAVE_ANDROID_OS
418 //out = getenv("ANDROID_PRODUCT_OUT");
419#endif
420 if (out == NULL)
421 out = "";
422
423 char* systemDir = (char*) malloc(strlen(out) + strlen(kSystemDir) +1);
424 char* dataDir = (char*) malloc(strlen(out) + strlen(kDataDir) +1);
425
426 sprintf(systemDir, "%s%s", out, kSystemDir);
427 sprintf(dataDir, "%s%s", out, kDataDir);
428 setenv("ANDROID_ROOT", systemDir, 1);
429 setenv("ANDROID_DATA", dataDir, 1);
430
431 char* assetDir = (char*) malloc(strlen(systemDir) + strlen(kAppSubdir) +1);
432 sprintf(assetDir, "%s%s", systemDir, kAppSubdir);
433
434 LOGI("Startup: sys='%s' asset='%s' data='%s'\n",
435 systemDir, assetDir, dataDir);
436 free(systemDir);
437 free(dataDir);
438
439#ifdef HAVE_ANDROID_OS
440 /* set up a process group for easier killing on the device */
441 setpgid(0, getpid());
442#endif
443
444 // Change to asset dir. This is only necessary if we've changed to
445 // a different directory, but there's little harm in doing it regardless.
446 //
447 // Expecting assets to live in the current dir is not a great idea,
448 // because some of our code or one of our libraries could change the
449 // directory out from under us. Preserve the behavior for now.
450 if (chdir(assetDir) != 0) {
451 LOGW("WARNING: could not change dir to '%s': %s\n",
452 assetDir, strerror(errno));
453 }
454 free(assetDir);
455
456#if 0
457 // Hack to keep libc from beating the filesystem to death. It's
458 // hitting /etc/localtime frequently,
459 //
460 // This statement locks us into Pacific time. We could do better,
461 // but there's not much point until we're sure that the library
462 // can't be changed to do more along the lines of what we want.
463#ifndef XP_WIN
464 setenv("TZ", "PST+8PDT,M4.1.0/2,M10.5.0/2", true);
465#endif
466#endif
467
468 /* track our progress through the boot sequence */
469 const int LOG_BOOT_PROGRESS_START = 3000;
470 LOG_EVENT_LONG(LOG_BOOT_PROGRESS_START,
471 ns2ms(systemTime(SYSTEM_TIME_MONOTONIC)));
472
473 validateTime();
474
475 proc = ProcessState::self();
476
477 boot_init();
478
479 /* If we are in multiprocess mode, have zygote spawn the system
480 * server process and call system_init(). If we are running in
481 * single process mode just call system_init() directly.
482 */
483 if (proc->supportsProcesses()) {
484 // If stdio logging is on, system_server should not inherit our stdio
485 // The dalvikvm instance will copy stdio to the log on its own
486 char propBuf[PROPERTY_VALUE_MAX];
487 bool logStdio = false;
488 property_get("log.redirect-stdio", propBuf, "");
489 logStdio = (strcmp(propBuf, "true") == 0);
490
491 zygote_run_oneshot((int)(!logStdio),
492 sizeof(ZYGOTE_ARGV) / sizeof(ZYGOTE_ARGV[0]),
493 ZYGOTE_ARGV);
494
495 //start_process("/system/bin/mediaserver");
496
497 } else {
498#ifndef HAVE_ANDROID_OS
499 QuickRuntime* runt = new QuickRuntime();
500 runt->start("com/android/server/SystemServer",
501 false /* spontaneously fork system server from zygote */);
502#endif
503 }
504
505 //printf("+++ post-zygote\n");
506
507 finish_system_init(proc);
508 run(proc);
509
510bail:
511 if (proc != NULL) {
512 proc->setContextObject(NULL);
513 }
514
515 return 0;
516}