Alexey Tarasov | 12a1d04 | 2009-10-25 01:37:37 +1100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 bsdroid project |
| 3 | * Alexey Tarasov <tarasov@dodologics.com> |
| 4 | * |
| 5 | * Copyright (C) 2007 The Android Open Source Project |
| 6 | * |
| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | * you may not use this file except in compliance with the License. |
| 9 | * You may obtain a copy of the License at |
| 10 | * |
| 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | * |
| 13 | * Unless required by applicable law or agreed to in writing, software |
| 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | * See the License for the specific language governing permissions and |
| 17 | * limitations under the License. |
| 18 | */ |
| 19 | |
| 20 | #include <sys/endian.h> |
| 21 | #include <sys/ioctl.h> |
| 22 | #include <sys/types.h> |
| 23 | #include <sys/uio.h> |
| 24 | |
| 25 | #include <err.h> |
| 26 | #include <errno.h> |
| 27 | #include <poll.h> |
| 28 | #include <stdio.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <strings.h> |
| 31 | #include <string.h> |
| 32 | #include <sysexits.h> |
| 33 | #include <unistd.h> |
| 34 | #include <libusb.h> |
| 35 | #include "sysdeps.h" |
| 36 | |
| 37 | #define TRACE_TAG TRACE_USB |
| 38 | #include "adb.h" |
| 39 | |
| 40 | static adb_mutex_t usb_lock = ADB_MUTEX_INITIALIZER; |
| 41 | static libusb_context *ctx = NULL; |
| 42 | |
| 43 | struct usb_handle |
| 44 | { |
| 45 | usb_handle *prev; |
| 46 | usb_handle *next; |
| 47 | |
| 48 | libusb_device *dev; |
| 49 | libusb_device_handle *devh; |
| 50 | int interface; |
| 51 | uint8_t dev_bus; |
| 52 | uint8_t dev_addr; |
| 53 | |
| 54 | int zero_mask; |
| 55 | unsigned char end_point_address[2]; |
| 56 | char serial[128]; |
| 57 | |
| 58 | adb_cond_t notify; |
| 59 | adb_mutex_t lock; |
| 60 | }; |
| 61 | |
| 62 | static struct usb_handle handle_list = { |
| 63 | .prev = &handle_list, |
| 64 | .next = &handle_list, |
| 65 | }; |
| 66 | |
| 67 | void |
| 68 | usb_cleanup() |
| 69 | { |
| 70 | libusb_exit(ctx); |
| 71 | } |
| 72 | |
| 73 | void |
| 74 | report_bulk_libusb_error(int r) |
| 75 | { |
| 76 | switch (r) { |
| 77 | case LIBUSB_ERROR_TIMEOUT: |
| 78 | D("Transfer timeout\n"); |
| 79 | break; |
| 80 | |
| 81 | case LIBUSB_ERROR_PIPE: |
| 82 | D("Control request is not supported\n"); |
| 83 | break; |
| 84 | |
| 85 | case LIBUSB_ERROR_OVERFLOW: |
| 86 | D("Device offered more data\n"); |
| 87 | break; |
| 88 | |
| 89 | case LIBUSB_ERROR_NO_DEVICE : |
| 90 | D("Device was disconnected\n"); |
| 91 | break; |
| 92 | |
| 93 | default: |
| 94 | D("Error %d during transfer\n", r); |
| 95 | break; |
| 96 | }; |
| 97 | } |
| 98 | |
| 99 | static int |
| 100 | usb_bulk_write(usb_handle *uh, const void *data, int len) |
| 101 | { |
| 102 | int r = 0; |
| 103 | int transferred = 0; |
| 104 | |
| 105 | r = libusb_bulk_transfer(uh->devh, uh->end_point_address[1], (void *)data, len, |
| 106 | &transferred, 0); |
| 107 | |
| 108 | if (r != 0) { |
| 109 | D("usb_bulk_write(): "); |
| 110 | report_bulk_libusb_error(r); |
| 111 | return r; |
| 112 | } |
| 113 | |
| 114 | return (transferred); |
| 115 | } |
| 116 | |
| 117 | static int |
| 118 | usb_bulk_read(usb_handle *uh, void *data, int len) |
| 119 | { |
| 120 | int r = 0; |
| 121 | int transferred = 0; |
| 122 | |
| 123 | r = libusb_bulk_transfer(uh->devh, uh->end_point_address[0], data, len, |
| 124 | &transferred, 0); |
| 125 | |
| 126 | if (r != 0) { |
| 127 | D("usb_bulk_read(): "); |
| 128 | report_bulk_libusb_error(r); |
| 129 | return r; |
| 130 | } |
| 131 | |
| 132 | return (transferred); |
| 133 | } |
| 134 | |
| 135 | int |
| 136 | usb_write(struct usb_handle *uh, const void *_data, int len) |
| 137 | { |
| 138 | unsigned char *data = (unsigned char*) _data; |
| 139 | int n; |
| 140 | int need_zero = 0; |
| 141 | |
| 142 | if (uh->zero_mask == 1) { |
| 143 | if (!(len & uh->zero_mask)) { |
| 144 | need_zero = 1; |
| 145 | } |
| 146 | } |
| 147 | |
| 148 | D("usb_write(): %p:%d -> transport %p\n", _data, len, uh); |
| 149 | |
| 150 | while (len > 0) { |
| 151 | int xfer = (len > 4096) ? 4096 : len; |
| 152 | |
| 153 | n = usb_bulk_write(uh, data, xfer); |
| 154 | |
| 155 | if (n != xfer) { |
| 156 | D("usb_write(): failed for transport %p (%d bytes left)\n", uh, len); |
| 157 | return -1; |
| 158 | } |
| 159 | |
| 160 | len -= xfer; |
| 161 | data += xfer; |
| 162 | } |
| 163 | |
| 164 | if (need_zero){ |
| 165 | n = usb_bulk_write(uh, _data, 0); |
| 166 | |
| 167 | if (n < 0) { |
| 168 | D("usb_write(): failed to finish operation for transport %p\n", uh); |
| 169 | } |
| 170 | return n; |
| 171 | } |
| 172 | |
| 173 | return 0; |
| 174 | } |
| 175 | |
| 176 | int |
| 177 | usb_read(struct usb_handle *uh, void *_data, int len) |
| 178 | { |
| 179 | unsigned char *data = (unsigned char*) _data; |
| 180 | int n; |
| 181 | |
| 182 | D("usb_read(): %p:%d <- transport %p\n", _data, len, uh); |
| 183 | |
| 184 | while (len > 0) { |
| 185 | int xfer = (len > 4096) ? 4096 : len; |
| 186 | |
| 187 | n = usb_bulk_read(uh, data, xfer); |
| 188 | |
| 189 | if (n != xfer) { |
| 190 | if (n > 0) { |
| 191 | data += n; |
| 192 | len -= n; |
| 193 | continue; |
| 194 | } |
| 195 | |
| 196 | D("usb_read(): failed for transport %p (%d bytes left)\n", uh, len); |
| 197 | return -1; |
| 198 | } |
| 199 | |
| 200 | len -= xfer; |
| 201 | data += xfer; |
| 202 | } |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | int |
| 208 | usb_close(struct usb_handle *h) |
| 209 | { |
| 210 | D("usb_close(): closing transport %p\n", h); |
| 211 | adb_mutex_lock(&usb_lock); |
| 212 | |
| 213 | h->next->prev = h->prev; |
| 214 | h->prev->next = h->next; |
| 215 | h->prev = NULL; |
| 216 | h->next = NULL; |
| 217 | |
| 218 | libusb_release_interface(h->devh, h->interface); |
| 219 | libusb_close(h->devh); |
| 220 | libusb_unref_device(h->dev); |
| 221 | |
| 222 | adb_mutex_unlock(&usb_lock); |
| 223 | |
| 224 | free(h); |
| 225 | |
| 226 | return (0); |
| 227 | } |
| 228 | |
| 229 | void usb_kick(struct usb_handle *h) |
| 230 | { |
| 231 | D("usb_cick(): kicking transport %p\n", h); |
| 232 | |
| 233 | adb_mutex_lock(&h->lock); |
| 234 | unregister_usb_transport(h); |
| 235 | adb_mutex_unlock(&h->lock); |
| 236 | |
| 237 | h->next->prev = h->prev; |
| 238 | h->prev->next = h->next; |
| 239 | h->prev = NULL; |
| 240 | h->next = NULL; |
| 241 | |
| 242 | libusb_release_interface(h->devh, h->interface); |
| 243 | libusb_close(h->devh); |
| 244 | libusb_unref_device(h->dev); |
| 245 | free(h); |
| 246 | } |
| 247 | |
| 248 | int |
| 249 | check_usb_interface(libusb_interface *interface, |
| 250 | libusb_device_descriptor *desc, |
| 251 | struct usb_handle *uh) |
| 252 | { |
| 253 | int e; |
| 254 | |
| 255 | if (interface->num_altsetting == 0) { |
| 256 | D("check_usb_interface(): No interface settings\n"); |
| 257 | return -1; |
| 258 | } |
| 259 | |
| 260 | libusb_interface_descriptor *idesc = &interface->altsetting[0]; |
| 261 | |
| 262 | if (idesc->bNumEndpoints != 2) { |
| 263 | D("check_usb_interface(): Interface have not 2 endpoints, ignoring\n"); |
| 264 | return -1; |
| 265 | } |
| 266 | |
| 267 | for (e = 0; e < idesc->bNumEndpoints; e++) { |
| 268 | libusb_endpoint_descriptor *edesc = &idesc->endpoint[e]; |
| 269 | |
| 270 | if (edesc->bmAttributes != LIBUSB_TRANSFER_TYPE_BULK) { |
| 271 | D("check_usb_interface(): Endpoint (%u) is not bulk (%u), ignoring\n", |
| 272 | edesc->bmAttributes, LIBUSB_TRANSFER_TYPE_BULK); |
| 273 | return -1; |
| 274 | } |
| 275 | |
| 276 | if (edesc->bEndpointAddress & LIBUSB_ENDPOINT_IN) |
| 277 | uh->end_point_address[0] = edesc->bEndpointAddress; |
| 278 | else |
| 279 | uh->end_point_address[1] = edesc->bEndpointAddress; |
| 280 | |
| 281 | /* aproto 01 needs 0 termination */ |
| 282 | if (idesc->bInterfaceProtocol == 0x01) { |
| 283 | uh->zero_mask = edesc->wMaxPacketSize - 1; |
| 284 | D("check_usb_interface(): Forced Android interface protocol v.1\n"); |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | D("check_usb_interface(): Device: %04x:%04x " |
| 289 | "iclass: %x, isclass: %x, iproto: %x ep: %x/%x-> ", |
| 290 | desc->idVendor, desc->idProduct, idesc->bInterfaceClass, |
| 291 | idesc->bInterfaceSubClass, idesc->bInterfaceProtocol, |
| 292 | uh->end_point_address[0], uh->end_point_address[1]); |
| 293 | |
| 294 | if (!is_adb_interface(desc->idVendor, desc->idProduct, |
| 295 | idesc->bInterfaceClass, idesc->bInterfaceSubClass, |
| 296 | idesc->bInterfaceProtocol)) |
| 297 | { |
| 298 | D("not matches\n"); |
| 299 | return -1; |
| 300 | } |
| 301 | |
| 302 | D("matches\n"); |
| 303 | return 1; |
| 304 | } |
| 305 | |
| 306 | int |
| 307 | check_usb_interfaces(libusb_config_descriptor *config, |
| 308 | libusb_device_descriptor *desc, struct usb_handle *uh) |
| 309 | { |
| 310 | int i; |
| 311 | |
| 312 | for (i = 0; i < config->bNumInterfaces; ++i) { |
| 313 | if (check_usb_interface(&config->interface[i], desc, uh) != -1) { |
| 314 | /* found some interface and saved information about it */ |
| 315 | D("check_usb_interfaces(): Interface %d of %04x:%04x " |
| 316 | "matches Android device\n", i, desc->idVendor, |
| 317 | desc->idProduct); |
| 318 | |
| 319 | return i; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | return -1; |
| 324 | } |
| 325 | |
| 326 | int |
| 327 | register_device(struct usb_handle *uh, const char *serial) |
| 328 | { |
| 329 | D("register_device(): Registering %p [%s] as USB transport\n", |
| 330 | uh, serial); |
| 331 | |
| 332 | struct usb_handle *usb= NULL; |
| 333 | |
| 334 | usb = calloc(1, sizeof(struct usb_handle)); |
| 335 | memcpy(usb, uh, sizeof(struct usb_handle)); |
| 336 | strcpy(usb->serial, uh->serial); |
| 337 | |
| 338 | adb_cond_init(&usb->notify, 0); |
| 339 | adb_mutex_init(&usb->lock, 0); |
| 340 | |
| 341 | adb_mutex_lock(&usb_lock); |
| 342 | |
| 343 | usb->next = &handle_list; |
| 344 | usb->prev = handle_list.prev; |
| 345 | usb->prev->next = usb; |
| 346 | usb->next->prev = usb; |
| 347 | |
| 348 | adb_mutex_unlock(&usb_lock); |
| 349 | |
Scott Anderson | 6dfaf4b | 2012-04-20 11:21:14 -0700 | [diff] [blame] | 350 | register_usb_transport(usb, serial, NULL, 1); |
Alexey Tarasov | 12a1d04 | 2009-10-25 01:37:37 +1100 | [diff] [blame] | 351 | |
| 352 | return (1); |
| 353 | } |
| 354 | |
| 355 | int |
| 356 | already_registered(usb_handle *uh) |
| 357 | { |
| 358 | struct usb_handle *usb= NULL; |
| 359 | int exists = 0; |
| 360 | |
| 361 | adb_mutex_lock(&usb_lock); |
| 362 | |
| 363 | for (usb = handle_list.next; usb != &handle_list; usb = usb->next) { |
| 364 | if ((usb->dev_bus == uh->dev_bus) && |
| 365 | (usb->dev_addr == uh->dev_addr)) |
| 366 | { |
| 367 | exists = 1; |
| 368 | break; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | adb_mutex_unlock(&usb_lock); |
| 373 | |
| 374 | return exists; |
| 375 | } |
| 376 | |
| 377 | void |
| 378 | check_device(libusb_device *dev) |
| 379 | { |
| 380 | struct usb_handle uh; |
| 381 | int i = 0; |
| 382 | int found = -1; |
| 383 | char serial[256] = {0}; |
| 384 | |
| 385 | libusb_device_descriptor desc; |
| 386 | libusb_config_descriptor *config = NULL; |
| 387 | |
| 388 | int r = libusb_get_device_descriptor(dev, &desc); |
| 389 | |
| 390 | if (r != LIBUSB_SUCCESS) { |
| 391 | D("check_device(): Failed to get device descriptor\n"); |
| 392 | return; |
| 393 | } |
| 394 | |
| 395 | if ((desc.idVendor == 0) && (desc.idProduct == 0)) |
| 396 | return; |
| 397 | |
| 398 | D("check_device(): Probing usb device %04x:%04x\n", |
| 399 | desc.idVendor, desc.idProduct); |
| 400 | |
| 401 | if (!is_adb_interface (desc.idVendor, desc.idProduct, |
| 402 | ADB_CLASS, ADB_SUBCLASS, ADB_PROTOCOL)) |
| 403 | { |
| 404 | D("check_device(): Ignored due unknown vendor id\n"); |
| 405 | return; |
| 406 | } |
| 407 | |
| 408 | uh.dev_bus = libusb_get_bus_number(dev); |
| 409 | uh.dev_addr = libusb_get_device_address(dev); |
| 410 | |
| 411 | if (already_registered(&uh)) { |
| 412 | D("check_device(): Device (bus: %d, address: %d) " |
| 413 | "is already registered\n", uh.dev_bus, uh.dev_addr); |
| 414 | return; |
| 415 | } |
| 416 | |
| 417 | D("check_device(): Device bus: %d, address: %d\n", |
| 418 | uh.dev_bus, uh.dev_addr); |
| 419 | |
| 420 | r = libusb_get_active_config_descriptor(dev, &config); |
| 421 | |
| 422 | if (r != 0) { |
| 423 | if (r == LIBUSB_ERROR_NOT_FOUND) { |
| 424 | D("check_device(): Device %4x:%4x is unconfigured\n", |
| 425 | desc.idVendor, desc.idProduct); |
| 426 | return; |
| 427 | } |
| 428 | |
| 429 | D("check_device(): Failed to get configuration for %4x:%4x\n", |
| 430 | desc.idVendor, desc.idProduct); |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | if (config == NULL) { |
| 435 | D("check_device(): Sanity check failed after " |
| 436 | "getting active config\n"); |
| 437 | return; |
| 438 | } |
| 439 | |
| 440 | if (config->interface != NULL) { |
| 441 | found = check_usb_interfaces(config, &desc, &uh); |
| 442 | } |
| 443 | |
| 444 | /* not needed anymore */ |
| 445 | libusb_free_config_descriptor(config); |
| 446 | |
| 447 | r = libusb_open(dev, &uh.devh); |
| 448 | uh.dev = dev; |
| 449 | |
| 450 | if (r != 0) { |
| 451 | switch (r) { |
| 452 | case LIBUSB_ERROR_NO_MEM: |
| 453 | D("check_device(): Memory allocation problem\n"); |
| 454 | break; |
| 455 | |
| 456 | case LIBUSB_ERROR_ACCESS: |
| 457 | D("check_device(): Permissions problem, " |
| 458 | "current user priveleges are messed up?\n"); |
| 459 | break; |
| 460 | |
| 461 | case LIBUSB_ERROR_NO_DEVICE: |
| 462 | D("check_device(): Device disconected, bad cable?\n"); |
| 463 | break; |
| 464 | |
| 465 | default: |
| 466 | D("check_device(): libusb triggered error %d\n", r); |
| 467 | } |
| 468 | // skip rest |
| 469 | found = -1; |
| 470 | } |
| 471 | |
| 472 | if (found >= 0) { |
| 473 | D("check_device(): Device matches Android interface\n"); |
| 474 | // read the device's serial number |
| 475 | memset(serial, 0, sizeof(serial)); |
| 476 | uh.interface = found; |
| 477 | |
| 478 | r = libusb_claim_interface(uh.devh, uh.interface); |
| 479 | |
| 480 | if (r < 0) { |
| 481 | D("check_device(): Failed to claim interface %d\n", |
| 482 | uh.interface); |
| 483 | |
| 484 | goto fail; |
| 485 | } |
| 486 | |
| 487 | if (desc.iSerialNumber) { |
| 488 | // reading serial |
| 489 | uint16_t buffer[128] = {0}; |
| 490 | uint16_t languages[128] = {0}; |
| 491 | int languageCount = 0; |
| 492 | |
| 493 | memset(languages, 0, sizeof(languages)); |
| 494 | r = libusb_control_transfer(uh.devh, |
| 495 | LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE, |
| 496 | LIBUSB_REQUEST_GET_DESCRIPTOR, LIBUSB_DT_STRING << 8, |
| 497 | 0, (uint8_t *)languages, sizeof(languages), 0); |
| 498 | |
| 499 | if (r <= 0) { |
| 500 | D("check_device(): Failed to get languages count\n"); |
| 501 | goto fail; |
| 502 | } |
| 503 | |
| 504 | languageCount = (r - 2) / 2; |
| 505 | |
| 506 | for (i = 1; i <= languageCount; ++i) { |
| 507 | memset(buffer, 0, sizeof(buffer)); |
| 508 | |
| 509 | r = libusb_control_transfer(uh.devh, |
| 510 | LIBUSB_ENDPOINT_IN | LIBUSB_REQUEST_TYPE_STANDARD | LIBUSB_RECIPIENT_DEVICE, |
| 511 | LIBUSB_REQUEST_GET_DESCRIPTOR, (LIBUSB_DT_STRING << 8) | desc.iSerialNumber, |
| 512 | languages[i], (uint8_t *)buffer, sizeof(buffer), 0); |
| 513 | |
| 514 | if (r > 0) { /* converting serial */ |
| 515 | int j = 0; |
| 516 | r /= 2; |
| 517 | |
| 518 | for (j = 1; j < r; ++j) |
| 519 | serial[j - 1] = buffer[j]; |
| 520 | |
| 521 | serial[j - 1] = '\0'; |
| 522 | break; /* languagesCount cycle */ |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | if (register_device(&uh, serial) == 0) { |
| 527 | D("check_device(): Failed to register device\n"); |
| 528 | goto fail_interface; |
| 529 | } |
| 530 | |
| 531 | libusb_ref_device(dev); |
| 532 | } |
| 533 | } |
| 534 | |
| 535 | return; |
| 536 | |
| 537 | fail_interface: |
| 538 | libusb_release_interface(uh.devh, uh.interface); |
| 539 | |
| 540 | fail: |
| 541 | libusb_close(uh.devh); |
| 542 | uh.devh = NULL; |
| 543 | } |
| 544 | |
| 545 | int |
| 546 | check_device_connected(struct usb_handle *uh) |
| 547 | { |
| 548 | int r = libusb_kernel_driver_active(uh->devh, uh->interface); |
| 549 | |
| 550 | if (r == LIBUSB_ERROR_NO_DEVICE) |
| 551 | return 0; |
| 552 | |
| 553 | if (r < 0) |
| 554 | return -1; |
| 555 | |
| 556 | return 1; |
| 557 | } |
| 558 | |
| 559 | void |
| 560 | kick_disconnected() |
| 561 | { |
| 562 | struct usb_handle *usb= NULL; |
| 563 | |
| 564 | adb_mutex_lock(&usb_lock); |
| 565 | |
| 566 | for (usb = handle_list.next; usb != &handle_list; usb = usb->next) { |
| 567 | |
| 568 | if (check_device_connected(usb) == 0) { |
| 569 | D("kick_disconnected(): Transport %p is not online anymore\n", |
| 570 | usb); |
| 571 | |
| 572 | usb_kick(usb); |
| 573 | } |
| 574 | } |
| 575 | |
| 576 | adb_mutex_unlock(&usb_lock); |
| 577 | } |
| 578 | |
| 579 | void |
| 580 | scan_usb_devices() |
| 581 | { |
| 582 | D("scan_usb_devices(): started\n"); |
| 583 | |
| 584 | libusb_device **devs= NULL; |
| 585 | libusb_device *dev= NULL; |
| 586 | ssize_t cnt = libusb_get_device_list(ctx, &devs); |
| 587 | |
| 588 | if (cnt < 0) { |
| 589 | D("scan_usb_devices(): Failed to get device list (error: %d)\n", |
| 590 | cnt); |
| 591 | |
| 592 | return; |
| 593 | } |
| 594 | |
| 595 | int i = 0; |
| 596 | |
| 597 | while ((dev = devs[i++]) != NULL) { |
| 598 | check_device(dev); |
| 599 | } |
| 600 | |
| 601 | libusb_free_device_list(devs, 1); |
| 602 | } |
| 603 | |
| 604 | void * |
| 605 | device_poll_thread(void* unused) |
| 606 | { |
| 607 | D("device_poll_thread(): Created USB scan thread\n"); |
| 608 | |
| 609 | for (;;) { |
| 610 | sleep(5); |
| 611 | kick_disconnected(); |
| 612 | scan_usb_devices(); |
| 613 | } |
| 614 | |
| 615 | /* never reaching this point */ |
| 616 | return (NULL); |
| 617 | } |
| 618 | |
| 619 | static void |
| 620 | sigalrm_handler(int signo) |
| 621 | { |
| 622 | /* nothing */ |
| 623 | } |
| 624 | |
| 625 | void |
| 626 | usb_init() |
| 627 | { |
| 628 | D("usb_init(): started\n"); |
| 629 | adb_thread_t tid; |
| 630 | struct sigaction actions; |
| 631 | |
| 632 | int r = libusb_init(&ctx); |
| 633 | |
| 634 | if (r != LIBUSB_SUCCESS) { |
| 635 | err(EX_IOERR, "Failed to init libusb\n"); |
| 636 | } |
| 637 | |
| 638 | memset(&actions, 0, sizeof(actions)); |
| 639 | |
| 640 | sigemptyset(&actions.sa_mask); |
| 641 | |
| 642 | actions.sa_flags = 0; |
| 643 | actions.sa_handler = sigalrm_handler; |
| 644 | |
| 645 | sigaction(SIGALRM, &actions, NULL); |
| 646 | |
| 647 | /* initial device scan */ |
| 648 | scan_usb_devices(); |
| 649 | |
| 650 | /* starting USB event polling thread */ |
| 651 | if (adb_thread_create(&tid, device_poll_thread, NULL)) { |
| 652 | err(EX_IOERR, "cannot create USB scan thread\n"); |
| 653 | } |
| 654 | |
| 655 | D("usb_init(): finished\n"); |
| 656 | } |
| 657 | |