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 <stddef.h> 18 #include <stdlib.h> 19 #include <stdio.h> 20 #include <unistd.h> 21 #include <string.h> 22 #include <errno.h> 23 24 #include "sysdeps.h" 25 26 #define TRACE_TAG TRACE_SERVICES 27 #include "adb.h" 28 #include "file_sync_service.h" 29 30 #if ADB_HOST 31 # ifndef HAVE_WINSOCK 32 # include <netinet/in.h> 33 # include <netdb.h> 34 # include <sys/ioctl.h> 35 # endif 36 #else 37 # include <cutils/android_reboot.h> 38 # include <cutils/properties.h> 39 #endif 40 41 typedef struct stinfo stinfo; 42 43 struct stinfo { 44 void (*func)(int fd, void *cookie); 45 int fd; 46 void *cookie; 47 }; 48 49 50 void *service_bootstrap_func(void *x) 51 { 52 stinfo *sti = x; 53 sti->func(sti->fd, sti->cookie); 54 free(sti); 55 return 0; 56 } 57 58 #if !ADB_HOST 59 60 void restart_root_service(int fd, void *cookie) 61 { 62 char buf[100]; 63 char value[PROPERTY_VALUE_MAX]; 64 65 if (getuid() == 0) { 66 snprintf(buf, sizeof(buf), "adbd is already running as root\n"); 67 writex(fd, buf, strlen(buf)); 68 adb_close(fd); 69 } else { 70 property_get("ro.debuggable", value, ""); 71 if (strcmp(value, "1") != 0) { 72 snprintf(buf, sizeof(buf), "adbd cannot run as root in production builds\n"); 73 writex(fd, buf, strlen(buf)); 74 adb_close(fd); 75 return; 76 } 77 78 property_set("service.adb.root", "1"); 79 snprintf(buf, sizeof(buf), "restarting adbd as root\n"); 80 writex(fd, buf, strlen(buf)); 81 adb_close(fd); 82 } 83 } 84 85 void restart_tcp_service(int fd, void *cookie) 86 { 87 char buf[100]; 88 char value[PROPERTY_VALUE_MAX]; 89 int port = (int)cookie; 90 91 if (port <= 0) { 92 snprintf(buf, sizeof(buf), "invalid port\n"); 93 writex(fd, buf, strlen(buf)); 94 adb_close(fd); 95 return; 96 } 97 98 snprintf(value, sizeof(value), "%d", port); 99 property_set("service.adb.tcp.port", value); 100 snprintf(buf, sizeof(buf), "restarting in TCP mode port: %d\n", port); 101 writex(fd, buf, strlen(buf)); 102 adb_close(fd); 103 } 104 105 void restart_usb_service(int fd, void *cookie) 106 { 107 char buf[100]; 108 109 property_set("service.adb.tcp.port", "0"); 110 snprintf(buf, sizeof(buf), "restarting in USB mode\n"); 111 writex(fd, buf, strlen(buf)); 112 adb_close(fd); 113 } 114 115 void reboot_service(int fd, void *arg) 116 { 117 char buf[100]; 118 char property_val[PROPERTY_VALUE_MAX]; 119 int pid, ret; 120 121 sync(); 122 123 /* Attempt to unmount the SD card first. 124 * No need to bother checking for errors. 125 */ 126 pid = fork(); 127 if (pid == 0) { 128 /* ask vdc to unmount it */ 129 execl("/system/bin/vdc", "/system/bin/vdc", "volume", "unmount", 130 getenv("EXTERNAL_STORAGE"), "force", NULL); 131 } else if (pid > 0) { 132 /* wait until vdc succeeds or fails */ 133 waitpid(pid, &ret, 0); 134 } 135 136 ret = snprintf(property_val, sizeof(property_val), "reboot,%s", (char *) arg); 137 if (ret >= (int) sizeof(property_val)) { 138 snprintf(buf, sizeof(buf), "reboot string too long. length=%d\n", ret); 139 writex(fd, buf, strlen(buf)); 140 goto cleanup; 141 } 142 143 ret = property_set(ANDROID_RB_PROPERTY, property_val); 144 if (ret < 0) { 145 snprintf(buf, sizeof(buf), "reboot failed: %d\n", ret); 146 writex(fd, buf, strlen(buf)); 147 goto cleanup; 148 } 149 // Don't return early. Give the reboot command time to take effect 150 // to avoid messing up scripts which do "adb reboot && adb wait-for-device" 151 while(1) { pause(); } 152 cleanup: 153 free(arg); 154 adb_close(fd); 155 } 156 157 #endif 158 159 static int create_service_thread(void (*func)(int, void *), void *cookie) 160 { 161 stinfo *sti; 162 adb_thread_t t; 163 int s[2]; 164 165 if(adb_socketpair(s)) { 166 printf("cannot create service socket pair\n"); 167 return -1; 168 } 169 170 sti = malloc(sizeof(stinfo)); 171 if(sti == 0) fatal("cannot allocate stinfo"); 172 sti->func = func; 173 sti->cookie = cookie; 174 sti->fd = s[1]; 175 176 if(adb_thread_create( &t, service_bootstrap_func, sti)){ 177 free(sti); 178 adb_close(s[0]); 179 adb_close(s[1]); 180 printf("cannot create service thread\n"); 181 return -1; 182 } 183 184 D("service thread started, %d:%d\n",s[0], s[1]); 185 return s[0]; 186 } 187 188 #if !ADB_HOST 189 static int create_subprocess(const char *cmd, const char *arg0, const char *arg1, pid_t *pid) 190 { 191 #ifdef HAVE_WIN32_PROC 192 D("create_subprocess(cmd=%s, arg0=%s, arg1=%s)\n", cmd, arg0, arg1); 193 fprintf(stderr, "error: create_subprocess not implemented on Win32 (%s %s %s)\n", cmd, arg0, arg1); 194 return -1; 195 #else /* !HAVE_WIN32_PROC */ 196 char *devname; 197 int ptm; 198 199 ptm = unix_open("/dev/ptmx", O_RDWR); // | O_NOCTTY); 200 if(ptm < 0){ 201 printf("[ cannot open /dev/ptmx - %s ]\n",strerror(errno)); 202 return -1; 203 } 204 fcntl(ptm, F_SETFD, FD_CLOEXEC); 205 206 if(grantpt(ptm) || unlockpt(ptm) || 207 ((devname = (char*) ptsname(ptm)) == 0)){ 208 printf("[ trouble with /dev/ptmx - %s ]\n", strerror(errno)); 209 adb_close(ptm); 210 return -1; 211 } 212 213 *pid = fork(); 214 if(*pid < 0) { 215 printf("- fork failed: %s -\n", strerror(errno)); 216 adb_close(ptm); 217 return -1; 218 } 219 220 if(*pid == 0){ 221 int pts; 222 223 setsid(); 224 225 pts = unix_open(devname, O_RDWR); 226 if(pts < 0) { 227 fprintf(stderr, "child failed to open pseudo-term slave: %s\n", devname); 228 exit(-1); 229 } 230 231 dup2(pts, 0); 232 dup2(pts, 1); 233 dup2(pts, 2); 234 235 adb_close(pts); 236 adb_close(ptm); 237 238 // set OOM adjustment to zero 239 char text[64]; 240 snprintf(text, sizeof text, "/proc/%d/oom_adj", getpid()); 241 int fd = adb_open(text, O_WRONLY); 242 if (fd >= 0) { 243 adb_write(fd, "0", 1); 244 adb_close(fd); 245 } else { 246 D("adb: unable to open %s\n", text); 247 } 248 execl(cmd, cmd, arg0, arg1, NULL); 249 fprintf(stderr, "- exec '%s' failed: %s (%d) -\n", 250 cmd, strerror(errno), errno); 251 exit(-1); 252 } else { 253 // Don't set child's OOM adjustment to zero. 254 // Let the child do it itself, as sometimes the parent starts 255 // running before the child has a /proc/pid/oom_adj. 256 // """adb: unable to open /proc/644/oom_adj""" seen in some logs. 257 return ptm; 258 } 259 #endif /* !HAVE_WIN32_PROC */ 260 } 261 #endif /* !ABD_HOST */ 262 263 #if ADB_HOST 264 #define SHELL_COMMAND "/bin/sh" 265 #else 266 #define SHELL_COMMAND "/system/bin/sh" 267 #endif 268 269 #if !ADB_HOST 270 static void subproc_waiter_service(int fd, void *cookie) 271 { 272 pid_t pid = (pid_t)cookie; 273 274 D("entered. fd=%d of pid=%d\n", fd, pid); 275 for (;;) { 276 int status; 277 pid_t p = waitpid(pid, &status, 0); 278 if (p == pid) { 279 D("fd=%d, post waitpid(pid=%d) status=%04x\n", fd, p, status); 280 if (WIFSIGNALED(status)) { 281 D("*** Killed by signal %d\n", WTERMSIG(status)); 282 break; 283 } else if (!WIFEXITED(status)) { 284 D("*** Didn't exit!!. status %d\n", status); 285 break; 286 } else if (WEXITSTATUS(status) >= 0) { 287 D("*** Exit code %d\n", WEXITSTATUS(status)); 288 break; 289 } 290 } 291 } 292 D("shell exited fd=%d of pid=%d err=%d\n", fd, pid, errno); 293 if (SHELL_EXIT_NOTIFY_FD >=0) { 294 int res; 295 res = writex(SHELL_EXIT_NOTIFY_FD, &fd, sizeof(fd)); 296 D("notified shell exit via fd=%d for pid=%d res=%d errno=%d\n", 297 SHELL_EXIT_NOTIFY_FD, pid, res, errno); 298 } 299 } 300 301 static int create_subproc_thread(const char *name) 302 { 303 stinfo *sti; 304 adb_thread_t t; 305 int ret_fd; 306 pid_t pid; 307 if(name) { 308 ret_fd = create_subprocess(SHELL_COMMAND, "-c", name, &pid); 309 } else { 310 ret_fd = create_subprocess(SHELL_COMMAND, "-", 0, &pid); 311 } 312 D("create_subprocess() ret_fd=%d pid=%d\n", ret_fd, pid); 313 314 sti = malloc(sizeof(stinfo)); 315 if(sti == 0) fatal("cannot allocate stinfo"); 316 sti->func = subproc_waiter_service; 317 sti->cookie = (void*)pid; 318 sti->fd = ret_fd; 319 320 if(adb_thread_create( &t, service_bootstrap_func, sti)){ 321 free(sti); 322 adb_close(ret_fd); 323 printf("cannot create service thread\n"); 324 return -1; 325 } 326 327 D("service thread started, fd=%d pid=%d\n",ret_fd, pid); 328 return ret_fd; 329 } 330 #endif 331 332 int service_to_fd(const char *name) 333 { 334 int ret = -1; 335 336 if(!strncmp(name, "tcp:", 4)) { 337 int port = atoi(name + 4); 338 name = strchr(name + 4, ':'); 339 if(name == 0) { 340 ret = socket_loopback_client(port, SOCK_STREAM); 341 if (ret >= 0) 342 disable_tcp_nagle(ret); 343 } else { 344 #if ADB_HOST 345 ret = socket_network_client(name + 1, port, SOCK_STREAM); 346 #else 347 return -1; 348 #endif 349 } 350 #ifndef HAVE_WINSOCK /* winsock doesn't implement unix domain sockets */ 351 } else if(!strncmp(name, "local:", 6)) { 352 ret = socket_local_client(name + 6, 353 ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); 354 } else if(!strncmp(name, "localreserved:", 14)) { 355 ret = socket_local_client(name + 14, 356 ANDROID_SOCKET_NAMESPACE_RESERVED, SOCK_STREAM); 357 } else if(!strncmp(name, "localabstract:", 14)) { 358 ret = socket_local_client(name + 14, 359 ANDROID_SOCKET_NAMESPACE_ABSTRACT, SOCK_STREAM); 360 } else if(!strncmp(name, "localfilesystem:", 16)) { 361 ret = socket_local_client(name + 16, 362 ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM); 363 #endif 364 #if !ADB_HOST 365 } else if(!strncmp("dev:", name, 4)) { 366 ret = unix_open(name + 4, O_RDWR); 367 } else if(!strncmp(name, "framebuffer:", 12)) { 368 ret = create_service_thread(framebuffer_service, 0); 369 } else if (!strncmp(name, "jdwp:", 5)) { 370 ret = create_jdwp_connection_fd(atoi(name+5)); 371 } else if (!strncmp(name, "log:", 4)) { 372 ret = create_service_thread(log_service, get_log_file_path(name + 4)); 373 } else if(!HOST && !strncmp(name, "shell:", 6)) { 374 if(name[6]) { 375 ret = create_subproc_thread(name + 6); 376 } else { 377 ret = create_subproc_thread(0); 378 } 379 } else if(!strncmp(name, "sync:", 5)) { 380 ret = create_service_thread(file_sync_service, NULL); 381 } else if(!strncmp(name, "remount:", 8)) { 382 ret = create_service_thread(remount_service, NULL); 383 } else if(!strncmp(name, "reboot:", 7)) { 384 void* arg = strdup(name + 7); 385 if(arg == 0) return -1; 386 ret = create_service_thread(reboot_service, arg); 387 } else if(!strncmp(name, "root:", 5)) { 388 ret = create_service_thread(restart_root_service, NULL); 389 } else if(!strncmp(name, "backup:", 7)) { 390 char* arg = strdup(name+7); 391 if (arg == NULL) return -1; 392 ret = backup_service(BACKUP, arg); 393 } else if(!strncmp(name, "restore:", 8)) { 394 ret = backup_service(RESTORE, NULL); 395 } else if(!strncmp(name, "tcpip:", 6)) { 396 int port; 397 if (sscanf(name + 6, "%d", &port) == 0) { 398 port = 0; 399 } 400 ret = create_service_thread(restart_tcp_service, (void *)port); 401 } else if(!strncmp(name, "usb:", 4)) { 402 ret = create_service_thread(restart_usb_service, NULL); 403 #endif 404 } 405 if (ret >= 0) { 406 close_on_exec(ret); 407 } 408 return ret; 409 } 410 411 #if ADB_HOST 412 struct state_info { 413 transport_type transport; 414 char* serial; 415 int state; 416 }; 417 418 static void wait_for_state(int fd, void* cookie) 419 { 420 struct state_info* sinfo = cookie; 421 char* err = "unknown error"; 422 423 D("wait_for_state %d\n", sinfo->state); 424 425 atransport *t = acquire_one_transport(sinfo->state, sinfo->transport, sinfo->serial, &err); 426 if(t != 0) { 427 writex(fd, "OKAY", 4); 428 } else { 429 sendfailmsg(fd, err); 430 } 431 432 if (sinfo->serial) 433 free(sinfo->serial); 434 free(sinfo); 435 adb_close(fd); 436 D("wait_for_state is done\n"); 437 } 438 439 static void connect_device(char* host, char* buffer, int buffer_size) 440 { 441 int port, fd; 442 char* portstr = strchr(host, ':'); 443 char hostbuf[100]; 444 char serial[100]; 445 int ret; 446 447 strncpy(hostbuf, host, sizeof(hostbuf) - 1); 448 if (portstr) { 449 if (portstr - host >= (ptrdiff_t)sizeof(hostbuf)) { 450 snprintf(buffer, buffer_size, "bad host name %s", host); 451 return; 452 } 453 // zero terminate the host at the point we found the colon 454 hostbuf[portstr - host] = 0; 455 if (sscanf(portstr + 1, "%d", &port) == 0) { 456 snprintf(buffer, buffer_size, "bad port number %s", portstr); 457 return; 458 } 459 } else { 460 port = DEFAULT_ADB_LOCAL_TRANSPORT_PORT; 461 } 462 463 snprintf(serial, sizeof(serial), "%s:%d", hostbuf, port); 464 465 fd = socket_network_client(hostbuf, port, SOCK_STREAM); 466 if (fd < 0) { 467 snprintf(buffer, buffer_size, "unable to connect to %s:%d", host, port); 468 return; 469 } 470 471 D("client: connected on remote on fd %d\n", fd); 472 close_on_exec(fd); 473 disable_tcp_nagle(fd); 474 475 ret = register_socket_transport(fd, serial, port, 0); 476 if (ret < 0) { 477 adb_close(fd); 478 snprintf(buffer, buffer_size, "already connected to %s", serial); 479 } else { 480 snprintf(buffer, buffer_size, "connected to %s", serial); 481 } 482 } 483 484 void connect_emulator(char* port_spec, char* buffer, int buffer_size) 485 { 486 char* port_separator = strchr(port_spec, ','); 487 if (!port_separator) { 488 snprintf(buffer, buffer_size, 489 "unable to parse '%s' as <console port>,<adb port>", 490 port_spec); 491 return; 492 } 493 494 // Zero-terminate console port and make port_separator point to 2nd port. 495 *port_separator++ = 0; 496 int console_port = strtol(port_spec, NULL, 0); 497 int adb_port = strtol(port_separator, NULL, 0); 498 if (!(console_port > 0 && adb_port > 0)) { 499 *(port_separator - 1) = ','; 500 snprintf(buffer, buffer_size, 501 "Invalid port numbers: Expected positive numbers, got '%s'", 502 port_spec); 503 return; 504 } 505 506 /* Check if the emulator is already known. 507 * Note: There's a small but harmless race condition here: An emulator not 508 * present just yet could be registered by another invocation right 509 * after doing this check here. However, local_connect protects 510 * against double-registration too. From here, a better error message 511 * can be produced. In the case of the race condition, the very specific 512 * error message won't be shown, but the data doesn't get corrupted. */ 513 atransport* known_emulator = find_emulator_transport_by_adb_port(adb_port); 514 if (known_emulator != NULL) { 515 snprintf(buffer, buffer_size, 516 "Emulator on port %d already registered.", adb_port); 517 return; 518 } 519 520 /* Check if more emulators can be registered. Similar unproblematic 521 * race condition as above. */ 522 int candidate_slot = get_available_local_transport_index(); 523 if (candidate_slot < 0) { 524 snprintf(buffer, buffer_size, "Cannot accept more emulators."); 525 return; 526 } 527 528 /* Preconditions met, try to connect to the emulator. */ 529 if (!local_connect_arbitrary_ports(console_port, adb_port)) { 530 snprintf(buffer, buffer_size, 531 "Connected to emulator on ports %d,%d", console_port, adb_port); 532 } else { 533 snprintf(buffer, buffer_size, 534 "Could not connect to emulator on ports %d,%d", 535 console_port, adb_port); 536 } 537 } 538 539 static void connect_service(int fd, void* cookie) 540 { 541 char buf[4096]; 542 char resp[4096]; 543 char *host = cookie; 544 545 if (!strncmp(host, "emu:", 4)) { 546 connect_emulator(host + 4, buf, sizeof(buf)); 547 } else { 548 connect_device(host, buf, sizeof(buf)); 549 } 550 551 // Send response for emulator and device 552 snprintf(resp, sizeof(resp), "%04x%s",(unsigned)strlen(buf), buf); 553 writex(fd, resp, strlen(resp)); 554 adb_close(fd); 555 } 556 #endif 557 558 #if ADB_HOST 559 asocket* host_service_to_socket(const char* name, const char *serial) 560 { 561 if (!strcmp(name,"track-devices")) { 562 return create_device_tracker(); 563 } else if (!strncmp(name, "wait-for-", strlen("wait-for-"))) { 564 struct state_info* sinfo = malloc(sizeof(struct state_info)); 565 566 if (serial) 567 sinfo->serial = strdup(serial); 568 else 569 sinfo->serial = NULL; 570 571 name += strlen("wait-for-"); 572 573 if (!strncmp(name, "local", strlen("local"))) { 574 sinfo->transport = kTransportLocal; 575 sinfo->state = CS_DEVICE; 576 } else if (!strncmp(name, "usb", strlen("usb"))) { 577 sinfo->transport = kTransportUsb; 578 sinfo->state = CS_DEVICE; 579 } else if (!strncmp(name, "any", strlen("any"))) { 580 sinfo->transport = kTransportAny; 581 sinfo->state = CS_DEVICE; 582 } else { 583 free(sinfo); 584 return NULL; 585 } 586 587 int fd = create_service_thread(wait_for_state, sinfo); 588 return create_local_socket(fd); 589 } else if (!strncmp(name, "connect:", 8)) { 590 const char *host = name + 8; 591 int fd = create_service_thread(connect_service, (void *)host); 592 return create_local_socket(fd); 593 } 594 return NULL; 595 } 596 #endif /* ADB_HOST */ 597
