1 /*
2 * Copyright (C) 2007 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 <stdlib.h>
18 #include <stdio.h>
19 #include <unistd.h>
20 #include <string.h>
21 #include <errno.h>
22
23 #include "sysdeps.h"
24
25 #define TRACE_TAG TRACE_SERVICES
26 #include "adb.h"
27 #include "file_sync_service.h"
28
29 #if ADB_HOST
30 # ifndef HAVE_WINSOCK
31 # include <netinet/in.h>
32 # include <netdb.h>
33 # include <sys/ioctl.h>
34 # endif
35 #else
36 # include <cutils/android_reboot.h>
37 #endif
38
39 typedef struct stinfo stinfo;
40
41 struct stinfo {
42 void (*func)(int fd, void *cookie);
43 int fd;
44 void *cookie;
45 };
46
47
service_bootstrap_func(void * x)48 void *service_bootstrap_func(void *x)
49 {
50 stinfo *sti = x;
51 sti->func(sti->fd, sti->cookie);
52 free(sti);
53 return 0;
54 }
55
56 #if ADB_HOST
57 ADB_MUTEX_DEFINE( dns_lock );
58
dns_service(int fd,void * cookie)59 static void dns_service(int fd, void *cookie)
60 {
61 char *hostname = cookie;
62 struct hostent *hp;
63 unsigned zero = 0;
64
65 adb_mutex_lock(&dns_lock);
66 hp = gethostbyname(hostname);
67 free(cookie);
68 if(hp == 0) {
69 writex(fd, &zero, 4);
70 } else {
71 writex(fd, hp->h_addr, 4);
72 }
73 adb_mutex_unlock(&dns_lock);
74 adb_close(fd);
75 }
76 #else
77 extern int recovery_mode;
78
recover_service(int s,void * cookie)79 static void recover_service(int s, void *cookie)
80 {
81 unsigned char buf[4096];
82 unsigned count = (unsigned) cookie;
83 int fd;
84
85 fd = adb_creat("/tmp/update", 0644);
86 if(fd < 0) {
87 adb_close(s);
88 return;
89 }
90
91 while(count > 0) {
92 unsigned xfer = (count > 4096) ? 4096 : count;
93 if(readx(s, buf, xfer)) break;
94 if(writex(fd, buf, xfer)) break;
95 count -= xfer;
96 }
97
98 if(count == 0) {
99 writex(s, "OKAY", 4);
100 } else {
101 writex(s, "FAIL", 4);
102 }
103 adb_close(fd);
104 adb_close(s);
105
106 fd = adb_creat("/tmp/update.begin", 0644);
107 adb_close(fd);
108 }
109
restart_root_service(int fd,void * cookie)110 void restart_root_service(int fd, void *cookie)
111 {
112 char buf[100];
113 char value[PROPERTY_VALUE_MAX];
114
115 if (getuid() == 0) {
116 snprintf(buf, sizeof(buf), "adbd is already running as root\n");
117 writex(fd, buf, strlen(buf));
118 adb_close(fd);
119 } else {
120 property_get("ro.debuggable", value, "");
121 if (strcmp(value, "1") != 0) {
122 snprintf(buf, sizeof(buf), "adbd cannot run as root in production builds\n");
123 writex(fd, buf, strlen(buf));
124 adb_close(fd);
125 return;
126 }
127
128 property_set("service.adb.root", "1");
129 snprintf(buf, sizeof(buf), "restarting adbd as root\n");
130 writex(fd, buf, strlen(buf));
131 adb_close(fd);
132 }
133 }
134
restart_tcp_service(int fd,void * cookie)135 void restart_tcp_service(int fd, void *cookie)
136 {
137 char buf[100];
138 char value[PROPERTY_VALUE_MAX];
139 int port = (int)cookie;
140
141 if (port <= 0) {
142 snprintf(buf, sizeof(buf), "invalid port\n");
143 writex(fd, buf, strlen(buf));
144 adb_close(fd);
145 return;
146 }
147
148 snprintf(value, sizeof(value), "%d", port);
149 property_set("service.adb.tcp.port", value);
150 snprintf(buf, sizeof(buf), "restarting in TCP mode port: %d\n", port);
151 writex(fd, buf, strlen(buf));
152 adb_close(fd);
153 }
154
restart_usb_service(int fd,void * cookie)155 void restart_usb_service(int fd, void *cookie)
156 {
157 char buf[100];
158
159 property_set("service.adb.tcp.port", "0");
160 snprintf(buf, sizeof(buf), "restarting in USB mode\n");
161 writex(fd, buf, strlen(buf));
162 adb_close(fd);
163 }
164
reboot_service(int fd,void * arg)165 void reboot_service(int fd, void *arg)
166 {
167 char buf[100];
168 int pid, ret;
169
170 sync();
171
172 /* Attempt to unmount the SD card first.
173 * No need to bother checking for errors.
174 */
175 pid = fork();
176 if (pid == 0) {
177 /* ask vdc to unmount it */
178 execl("/system/bin/vdc", "/system/bin/vdc", "volume", "unmount",
179 getenv("EXTERNAL_STORAGE"), "force", NULL);
180 } else if (pid > 0) {
181 /* wait until vdc succeeds or fails */
182 waitpid(pid, &ret, 0);
183 }
184
185 ret = android_reboot(ANDROID_RB_RESTART2, 0, (char *) arg);
186 if (ret < 0) {
187 snprintf(buf, sizeof(buf), "reboot failed: %s\n", strerror(errno));
188 writex(fd, buf, strlen(buf));
189 }
190 free(arg);
191 adb_close(fd);
192 }
193
194 #endif
195
196 #if 0
197 static void echo_service(int fd, void *cookie)
198 {
199 char buf[4096];
200 int r;
201 char *p;
202 int c;
203
204 for(;;) {
205 r = read(fd, buf, 4096);
206 if(r == 0) goto done;
207 if(r < 0) {
208 if(errno == EINTR) continue;
209 else goto done;
210 }
211
212 c = r;
213 p = buf;
214 while(c > 0) {
215 r = write(fd, p, c);
216 if(r > 0) {
217 c -= r;
218 p += r;
219 continue;
220 }
221 if((r < 0) && (errno == EINTR)) continue;
222 goto done;
223 }
224 }
225 done:
226 close(fd);
227 }
228 #endif
229
create_service_thread(void (* func)(int,void *),void * cookie)230 static int create_service_thread(void (*func)(int, void *), void *cookie)
231 {
232 stinfo *sti;
233 adb_thread_t t;
234 int s[2];
235
236 if(adb_socketpair(s)) {
237 printf("cannot create service socket pair\n");
238 return -1;
239 }
240
241 sti = malloc(sizeof(stinfo));
242 if(sti == 0) fatal("cannot allocate stinfo");
243 sti->func = func;
244 sti->cookie = cookie;
245 sti->fd = s[1];
246
247 if(adb_thread_create( &t, service_bootstrap_func, sti)){
248 free(sti);
249 adb_close(s[0]);
250 adb_close(s[1]);
251 printf("cannot create service thread\n");
252 return -1;
253 }
254
255 D("service thread started, %d:%d\n",s[0], s[1]);
256 return s[0];
257 }
258
259 #if !ADB_HOST
create_subprocess(const char * cmd,const char * arg0,const char * arg1,pid_t * pid)260 static int create_subprocess(const char *cmd, const char *arg0, const char *arg1, pid_t *pid)
261 {
262 #ifdef HAVE_WIN32_PROC
263 D("create_subprocess(cmd=%s, arg0=%s, arg1=%s)\n", cmd, arg0, arg1);
264 fprintf(stderr, "error: create_subprocess not implemented on Win32 (%s %s %s)\n", cmd, arg0, arg1);
265 return -1;
266 #else /* !HAVE_WIN32_PROC */
267 char *devname;
268 int ptm;
269
270 ptm = unix_open("/dev/ptmx", O_RDWR); // | O_NOCTTY);
271 if(ptm < 0){
272 printf("[ cannot open /dev/ptmx - %s ]\n",strerror(errno));
273 return -1;
274 }
275 fcntl(ptm, F_SETFD, FD_CLOEXEC);
276
277 if(grantpt(ptm) || unlockpt(ptm) ||
278 ((devname = (char*) ptsname(ptm)) == 0)){
279 printf("[ trouble with /dev/ptmx - %s ]\n", strerror(errno));
280 adb_close(ptm);
281 return -1;
282 }
283
284 *pid = fork();
285 if(*pid < 0) {
286 printf("- fork failed: %s -\n", strerror(errno));
287 adb_close(ptm);
288 return -1;
289 }
290
291 if(*pid == 0){
292 int pts;
293
294 setsid();
295
296 pts = unix_open(devname, O_RDWR);
297 if(pts < 0) {
298 fprintf(stderr, "child failed to open pseudo-term slave: %s\n", devname);
299 exit(-1);
300 }
301
302 dup2(pts, 0);
303 dup2(pts, 1);
304 dup2(pts, 2);
305
306 adb_close(pts);
307 adb_close(ptm);
308
309 // set OOM adjustment to zero
310 char text[64];
311 snprintf(text, sizeof text, "/proc/%d/oom_adj", getpid());
312 int fd = adb_open(text, O_WRONLY);
313 if (fd >= 0) {
314 adb_write(fd, "0", 1);
315 adb_close(fd);
316 } else {
317 D("adb: unable to open %s\n", text);
318 }
319 execl(cmd, cmd, arg0, arg1, NULL);
320 fprintf(stderr, "- exec '%s' failed: %s (%d) -\n",
321 cmd, strerror(errno), errno);
322 exit(-1);
323 } else {
324 // Don't set child's OOM adjustment to zero.
325 // Let the child do it itself, as sometimes the parent starts
326 // running before the child has a /proc/pid/oom_adj.
327 // """adb: unable to open /proc/644/oom_adj""" seen in some logs.
328 return ptm;
329 }
330 #endif /* !HAVE_WIN32_PROC */
331 }
332 #endif /* !ABD_HOST */
333
334 #if ADB_HOST
335 #define SHELL_COMMAND "/bin/sh"
336 #else
337 #define SHELL_COMMAND "/system/bin/sh"
338 #endif
339
340 #if !ADB_HOST
subproc_waiter_service(int fd,void * cookie)341 static void subproc_waiter_service(int fd, void *cookie)
342 {
343 pid_t pid = (pid_t)cookie;
344
345 D("entered. fd=%d of pid=%d\n", fd, pid);
346 for (;;) {
347 int status;
348 pid_t p = waitpid(pid, &status, 0);
349 if (p == pid) {
350 D("fd=%d, post waitpid(pid=%d) status=%04x\n", fd, p, status);
351 if (WIFSIGNALED(status)) {
352 D("*** Killed by signal %d\n", WTERMSIG(status));
353 break;
354 } else if (!WIFEXITED(status)) {
355 D("*** Didn't exit!!. status %d\n", status);
356 break;
357 } else if (WEXITSTATUS(status) >= 0) {
358 D("*** Exit code %d\n", WEXITSTATUS(status));
359 break;
360 }
361 }
362 }
363 D("shell exited fd=%d of pid=%d err=%d\n", fd, pid, errno);
364 if (SHELL_EXIT_NOTIFY_FD >=0) {
365 int res;
366 res = writex(SHELL_EXIT_NOTIFY_FD, &fd, sizeof(fd));
367 D("notified shell exit via fd=%d for pid=%d res=%d errno=%d\n",
368 SHELL_EXIT_NOTIFY_FD, pid, res, errno);
369 }
370 }
371
create_subproc_thread(const char * name)372 static int create_subproc_thread(const char *name)
373 {
374 stinfo *sti;
375 adb_thread_t t;
376 int ret_fd;
377 pid_t pid;
378 if(name) {
379 ret_fd = create_subprocess(SHELL_COMMAND, "-c", name, &pid);
380 } else {
381 ret_fd = create_subprocess(SHELL_COMMAND, "-", 0, &pid);
382 }
383 D("create_subprocess() ret_fd=%d pid=%d\n", ret_fd, pid);
384
385 sti = malloc(sizeof(stinfo));
386 if(sti == 0) fatal("cannot allocate stinfo");
387 sti->func = subproc_waiter_service;
388 sti->cookie = (void*)pid;
389 sti->fd = ret_fd;
390
391 if(adb_thread_create( &t, service_bootstrap_func, sti)){
392 free(sti);
393 adb_close(ret_fd);
394 printf("cannot create service thread\n");
395 return -1;
396 }
397
398 D("service thread started, fd=%d pid=%d\n",ret_fd, pid);
399 return ret_fd;
400 }
401 #endif
402
service_to_fd(const char * name)403 int service_to_fd(const char *name)
404 {
405 int ret = -1;
406
407 if(!strncmp(name, "tcp:", 4)) {
408 int port = atoi(name + 4);
409 name = strchr(name + 4, ':');
410 if(name == 0) {
411 ret = socket_loopback_client(port, SOCK_STREAM);
412 if (ret >= 0)
413 disable_tcp_nagle(ret);
414 } else {
415 #if ADB_HOST
416 adb_mutex_lock(&dns_lock);
417 ret = socket_network_client(name + 1, port, SOCK_STREAM);
418 adb_mutex_unlock(&dns_lock);
419 #else
420 return -1;
421 #endif
422 }
423 #ifndef HAVE_WINSOCK /* winsock doesn't implement unix domain sockets */
424 } else if(!strncmp(name, "local:", 6)) {
425 ret = socket_local_client(name + 6,
426 ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
427 } else if(!strncmp(name, "localreserved:", 14)) {
428 ret = socket_local_client(name + 14,
429 ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM);
430 } else if(!strncmp(name, "localabstract:", 14)) {
431 ret = socket_local_client(name + 14,
432 ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM);
433 } else if(!strncmp(name, "localfilesystem:", 16)) {
434 ret = socket_local_client(name + 16,
435 ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM);
436 #endif
437 #if ADB_HOST
438 } else if(!strncmp("dns:", name, 4)){
439 char *n = strdup(name + 4);
440 if(n == 0) return -1;
441 ret = create_service_thread(dns_service, n);
442 #else /* !ADB_HOST */
443 } else if(!strncmp("dev:", name, 4)) {
444 ret = unix_open(name + 4, O_RDWR);
445 } else if(!strncmp(name, "framebuffer:", 12)) {
446 ret = create_service_thread(framebuffer_service, 0);
447 } else if(recovery_mode && !strncmp(name, "recover:", 8)) {
448 ret = create_service_thread(recover_service, (void*) atoi(name + 8));
449 } else if (!strncmp(name, "jdwp:", 5)) {
450 ret = create_jdwp_connection_fd(atoi(name+5));
451 } else if (!strncmp(name, "log:", 4)) {
452 ret = create_service_thread(log_service, get_log_file_path(name + 4));
453 } else if(!HOST && !strncmp(name, "shell:", 6)) {
454 if(name[6]) {
455 ret = create_subproc_thread(name + 6);
456 } else {
457 ret = create_subproc_thread(0);
458 }
459 } else if(!strncmp(name, "sync:", 5)) {
460 ret = create_service_thread(file_sync_service, NULL);
461 } else if(!strncmp(name, "remount:", 8)) {
462 ret = create_service_thread(remount_service, NULL);
463 } else if(!strncmp(name, "reboot:", 7)) {
464 void* arg = strdup(name + 7);
465 if(arg == 0) return -1;
466 ret = create_service_thread(reboot_service, arg);
467 } else if(!strncmp(name, "root:", 5)) {
468 ret = create_service_thread(restart_root_service, NULL);
469 } else if(!strncmp(name, "backup:", 7)) {
470 char* arg = strdup(name+7);
471 if (arg == NULL) return -1;
472 ret = backup_service(BACKUP, arg);
473 } else if(!strncmp(name, "restore:", 8)) {
474 ret = backup_service(RESTORE, NULL);
475 } else if(!strncmp(name, "tcpip:", 6)) {
476 int port;
477 if (sscanf(name + 6, "%d", &port) == 0) {
478 port = 0;
479 }
480 ret = create_service_thread(restart_tcp_service, (void *)port);
481 } else if(!strncmp(name, "usb:", 4)) {
482 ret = create_service_thread(restart_usb_service, NULL);
483 #endif
484 #if 0
485 } else if(!strncmp(name, "echo:", 5)){
486 ret = create_service_thread(echo_service, 0);
487 #endif
488 }
489 if (ret >= 0) {
490 close_on_exec(ret);
491 }
492 return ret;
493 }
494
495 #if ADB_HOST
496 struct state_info {
497 transport_type transport;
498 char* serial;
499 int state;
500 };
501
wait_for_state(int fd,void * cookie)502 static void wait_for_state(int fd, void* cookie)
503 {
504 struct state_info* sinfo = cookie;
505 char* err = "unknown error";
506
507 D("wait_for_state %d\n", sinfo->state);
508
509 atransport *t = acquire_one_transport(sinfo->state, sinfo->transport, sinfo->serial, &err);
510 if(t != 0) {
511 writex(fd, "OKAY", 4);
512 } else {
513 sendfailmsg(fd, err);
514 }
515
516 if (sinfo->serial)
517 free(sinfo->serial);
518 free(sinfo);
519 adb_close(fd);
520 D("wait_for_state is done\n");
521 }
522 #endif
523
524 #if ADB_HOST
host_service_to_socket(const char * name,const char * serial)525 asocket* host_service_to_socket(const char* name, const char *serial)
526 {
527 if (!strcmp(name,"track-devices")) {
528 return create_device_tracker();
529 } else if (!strncmp(name, "wait-for-", strlen("wait-for-"))) {
530 struct state_info* sinfo = malloc(sizeof(struct state_info));
531
532 if (serial)
533 sinfo->serial = strdup(serial);
534 else
535 sinfo->serial = NULL;
536
537 name += strlen("wait-for-");
538
539 if (!strncmp(name, "local", strlen("local"))) {
540 sinfo->transport = kTransportLocal;
541 sinfo->state = CS_DEVICE;
542 } else if (!strncmp(name, "usb", strlen("usb"))) {
543 sinfo->transport = kTransportUsb;
544 sinfo->state = CS_DEVICE;
545 } else if (!strncmp(name, "any", strlen("any"))) {
546 sinfo->transport = kTransportAny;
547 sinfo->state = CS_DEVICE;
548 } else {
549 free(sinfo);
550 return NULL;
551 }
552
553 int fd = create_service_thread(wait_for_state, sinfo);
554 return create_local_socket(fd);
555 }
556 return NULL;
557 }
558 #endif /* ADB_HOST */
559