| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | dev_pt_common.c |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | This file is a test for the Pseudo Terminals: /dev/ptmx, /dev/pts/<n> |
| 12 | devices. |
| 13 | |
| 14 | --*/ |
| 15 | |
| 16 | #include "dev_pt_common.h" |
| 17 | |
| 18 | pid_t ForkPtyCommon(int* PtmFdOut, int* PtsFdOut, bool UseMasterEndpoint); |
| 19 | |
| 20 | void DumpBuffer(const char Data[], size_t DataSize) |
| 21 | |
| 22 | /*++ |
| 23 | |
| 24 | Routine Description: |
| 25 | |
| 26 | This routine will log the Data. |
| 27 | |
| 28 | Arguments: |
| 29 | |
| 30 | Data - Supplies the buffer to be filled. |
| 31 | |
| 32 | DataSize - Supplies the size of the data buffer. |
| 33 | |
| 34 | Return Value: |
| 35 | |
| 36 | None |
| 37 | |
| 38 | --*/ |
| 39 | |
| 40 | { |
| 41 | |
| 42 | size_t Index; |
| 43 | for (Index = 0; Index < DataSize; Index++) |
| 44 | { |
| 45 | printf("%d:(", Data[Index]); |
| 46 | if (Data[Index] == '\n') |
| 47 | { |
| 48 | printf("\\n"); |
| 49 | } |
| 50 | else if (Data[Index] == '\r') |
| 51 | { |
| 52 | printf("\\r"); |
| 53 | } |
| 54 | else if (Data[Index] == '\t') |
| 55 | { |
| 56 | printf("\\t"); |
| 57 | } |
| 58 | else |
| 59 | { |
| 60 | printf("%c", Data[Index]); |
| 61 | } |
| 62 | |
| 63 | printf(") "); |
| 64 | } |
| 65 | |
| 66 | return; |
| 67 | } |
| 68 | |
| 69 | int GetPtSerialNumFromDeviceString(const char PtsNameString[]) |
| 70 | |
| 71 | /*++ |
| 72 | |
| 73 | Routine Description: |
| 74 | |
| 75 | This routine will parse the PTS (Pseudo Terminal Slave) device name and |
| 76 | retrieve the Serial Number from the string. |
| 77 | |
| 78 | Arguments: |
| 79 | |
| 80 | PtsNameString - Supplies the device name of the PTS. The name should be |
| 81 | of the format "/dev/pts/<n>" where 'n' is the Serial Number. The string |
| 82 | should also be NULL terminated. |
| 83 | |
| 84 | Return Value: |
| 85 | |
| 86 | Returns the Serial Number, which is >=0 on success, -1 on failure. |
| 87 | |
| 88 | --*/ |
| 89 | |
| 90 | { |
| 91 | |
| 92 | int NumberOfItemsScanned; |
| 93 | int Result; |
| 94 | int SerialNumber; |
| 95 | |
| 96 | SerialNumber = 0; |
| 97 | |
| 98 | NumberOfItemsScanned = sscanf(PtsNameString, "/dev/pts/%d", &SerialNumber); |
| 99 | if (NumberOfItemsScanned != 1) |
| 100 | { |
| 101 | Result = -1; |
| 102 | goto ErrorExit; |
| 103 | } |
| 104 | |
| 105 | Result = SerialNumber; |
| 106 | |
| 107 | ErrorExit: |
| 108 | return Result; |
| 109 | } |
| 110 | |
| 111 | int GetRandomMessage(char Message[], size_t MessageSize, bool CompleteMessage) |
| 112 | /*++ |
| 113 | |
| 114 | Routine Description: |
| 115 | |
| 116 | This routine will fill the message buffer with random bytes for the |
| 117 | specified size. If a complete message is requested, then it will set the |
| 118 | last byte in the message with the completion character. |
| 119 | |
| 120 | Arguments: |
| 121 | |
| 122 | Message - Supplies the buffer to be filled with data. |
| 123 | |
| 124 | MessageSize - Supplies the size to be filled. Size should be >=1. |
| 125 | |
| 126 | CompleteMessage - Supplies the flag which indicates whether the message |
| 127 | should be completed with a terminating character or not. |
| 128 | |
| 129 | Return Value: |
| 130 | |
| 131 | Returns 0 on success, -1 on failure. |
| 132 | |
| 133 | --*/ |
| 134 | |
| 135 | { |
| 136 | size_t Itr; |
| 137 | size_t NumBytesToFill; |
| 138 | |
| 139 | // |
| 140 | // If the message has to be completed, last byte is reserved for the |
| 141 | // terminating character. |
| 142 | // |
| 143 | |
| 144 | if (CompleteMessage != FALSE) |
| 145 | { |
| 146 | NumBytesToFill = MessageSize - 1; |
| 147 | Message[NumBytesToFill] = '\n'; |
| 148 | } |
| 149 | else |
| 150 | { |
| 151 | NumBytesToFill = MessageSize; |
| 152 | } |
| 153 | |
| 154 | for (Itr = 0; Itr < NumBytesToFill; Itr += 1) |
| 155 | { |
| 156 | |
| 157 | // |
| 158 | // TODO_LX_PTYT: Randomize the data. |
| 159 | // |
| 160 | |
| 161 | Message[Itr] = 'A' + (Itr % 26); |
| 162 | } |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | int OpenMasterSubordinate(int* PtmFd, int* PtsFd, char* PtsDevName, int* SerialNumber) |
| 168 | |
| 169 | /*++ |
| 170 | |
| 171 | Routine Description: |
| 172 | |
| 173 | This routine will open a master and subordinate pseudo terminal. |
| 174 | It will also extract the serial number of the subordinate and |
| 175 | return it in 'SerialNumber'. |
| 176 | |
| 177 | Arguments: |
| 178 | |
| 179 | PtmFd - Supplies the pointer which will be set to the FD of the |
| 180 | master, on success. This parameter is not optional. |
| 181 | |
| 182 | PtsFd - Supplies the pointer which will be set to the FD of the |
| 183 | subordinate, on success. This parameter is not optional. |
| 184 | |
| 185 | PtsDevName - Supplies the pointer to the buffer that will hold |
| 186 | the subordinate device name, on success. This parameter is |
| 187 | optional. |
| 188 | |
| 189 | SerialNumber - Supplies the pointer which will be set to the |
| 190 | serial number of the subordinate pseudo terminal. This |
| 191 | parameter is optional. |
| 192 | |
| 193 | Return Value: |
| 194 | |
| 195 | 0 on success, error code on failure. |
| 196 | --*/ |
| 197 | |
| 198 | { |
| 199 | |
| 200 | int Fdm; |
| 201 | int Fds; |
| 202 | char LocalBuffer[PTS_DEV_NAME_BUFFER_SIZE]; |
| 203 | int Result; |
| 204 | int SubordinateSerialNumber; |
| 205 | |
| 206 | // |
| 207 | // Initialize locals |
| 208 | // |
| 209 | |
| 210 | Result = -1; |
| 211 | Fdm = -1; |
| 212 | Fds = -1; |
| 213 | |
| 214 | LxtCheckErrno((Fdm = open("/dev/ptmx", O_RDWR))); |
| 215 | LxtCheckErrno(grantpt(Fdm)); |
| 216 | LxtCheckErrno(unlockpt(Fdm)); |
| 217 | LxtCheckErrno(ptsname_r(Fdm, LocalBuffer, PTS_DEV_NAME_BUFFER_SIZE)); |
| 218 | LxtCheckErrno(Fds = open(LocalBuffer, O_RDWR)); |
| 219 | if (PtsDevName != NULL) |
| 220 | { |
| 221 | strcpy(PtsDevName, LocalBuffer); |
| 222 | } |
| 223 | |
| 224 | if (SerialNumber != NULL) |
| 225 | { |
| 226 | LxtCheckErrno(SubordinateSerialNumber = GetPtSerialNumFromDeviceString(LocalBuffer)); |
| 227 | *SerialNumber = SubordinateSerialNumber; |
| 228 | } |
| 229 | |
| 230 | *PtmFd = Fdm; |
| 231 | *PtsFd = Fds; |
| 232 | Fdm = -1; |
| 233 | Fds = -1; |
| 234 | Result = 0; |
| 235 | |
| 236 | ErrorExit: |
| 237 | if (Fdm != -1) |
| 238 | { |
| 239 | close(Fdm); |
| 240 | } |
| 241 | |
| 242 | if (Fds != -1) |
| 243 | { |
| 244 | close(Fds); |
| 245 | } |
| 246 | |
| 247 | return Result; |
| 248 | } |
| 249 | |
| 250 | pid_t ForkPty(int* PtmFdOut, int* PtsFdOut) |
| 251 | |
| 252 | /*++ |
| 253 | |
| 254 | Routine Description: |
| 255 | |
| 256 | This routine sets up a new process as a foreground process using PtsFd as |
| 257 | its controlling terminal. |
| 258 | |
| 259 | Arguments: |
| 260 | |
| 261 | PtmFdOut - Supplies a pointer to receive the master file descriptor. |
| 262 | |
| 263 | PtsFdOut - Supplies a pointer to receive the subordinate file descriptor. |
| 264 | |
| 265 | Return Value: |
| 266 | |
| 267 | Returns pid of newly forked process to the parent, zero to the child and |
| 268 | <0 on error. |
| 269 | |
| 270 | --*/ |
| 271 | |
| 272 | { |
| 273 | |
| 274 | return ForkPtyCommon(PtmFdOut, PtsFdOut, false); |
| 275 | } |
| 276 | |
| 277 | int ForkPtyBackground(int* PtmFdOut, int* PtsFdOut, pid_t* ForegroundIdOut) |
| 278 | |
| 279 | /*++ |
| 280 | |
| 281 | Routine Description: |
| 282 | |
| 283 | This routine sets up a new process as a background process using PtsFd as |
| 284 | its controlling terminal. |
| 285 | |
| 286 | Arguments: |
| 287 | |
| 288 | PtmFdOut - Supplies a pointer to receive the master file descriptor. |
| 289 | |
| 290 | PtsFdOut - Supplies a pointer to receive the subordinate file descriptor. |
| 291 | |
| 292 | ForegroundId - Supplies a pointer to receive the ID of the foreground |
| 293 | process. |
| 294 | |
| 295 | Return Value: |
| 296 | |
| 297 | Returns pid of newly forked process to the parent, zero to the child and |
| 298 | <0 on error. |
| 299 | |
| 300 | --*/ |
| 301 | |
| 302 | { |
| 303 | |
| 304 | int ChildPid; |
| 305 | int GrandChildPid; |
| 306 | int GrandChildStatus; |
| 307 | int PtmFd; |
| 308 | int PtsFd; |
| 309 | int Result; |
| 310 | |
| 311 | ChildPid = -1; |
| 312 | GrandChildPid = -1; |
| 313 | PtmFd = -1; |
| 314 | PtsFd = -1; |
| 315 | |
| 316 | LxtCheckErrno(ChildPid = ForkPty(&PtmFd, &PtsFd)); |
| 317 | if (ChildPid == 0) |
| 318 | { |
| 319 | *ForegroundIdOut = getpid(); |
| 320 | LxtCheckErrno(GrandChildPid = fork()); |
| 321 | if (GrandChildPid == 0) |
| 322 | { |
| 323 | LxtCheckErrno(setpgid(0, 0)); |
| 324 | } |
| 325 | else |
| 326 | { |
| 327 | LxtCheckErrno(TEMP_FAILURE_RETRY(Result = waitpid(GrandChildPid, &GrandChildStatus, 0))); |
| 328 | LxtCheckResult(WIFEXITED(GrandChildStatus) ? 0 : -1); |
| 329 | LxtCheckResult((int)(char)WEXITSTATUS(GrandChildStatus)); |
| 330 | } |
| 331 | } |
| 332 | else |
| 333 | { |
| 334 | *ForegroundIdOut = ChildPid; |
| 335 | } |
| 336 | |
| 337 | *PtmFdOut = PtmFd; |
| 338 | PtmFd = -1; |
| 339 | *PtsFdOut = PtsFd; |
| 340 | PtsFd = -1; |
| 341 | |
| 342 | ErrorExit: |
| 343 | if (PtmFd != -1) |
| 344 | { |
| 345 | close(PtmFd); |
| 346 | } |
| 347 | |
| 348 | if (PtsFd != -1) |
| 349 | { |
| 350 | close(PtsFd); |
| 351 | } |
| 352 | |
| 353 | if ((ChildPid == 0) && (GrandChildPid > 0)) |
| 354 | { |
| 355 | exit(Result); |
| 356 | } |
| 357 | |
| 358 | return ChildPid; |
| 359 | } |
| 360 | |
| 361 | pid_t ForkPtyCommon(int* PtmFdOut, int* PtsFdOut, bool UseMasterEndpoint) |
| 362 | |
| 363 | /*++ |
| 364 | |
| 365 | Routine Description: |
| 366 | |
| 367 | This routine sets up a new process as a foreground process using PtsFd as |
| 368 | its controlling terminal. |
| 369 | |
| 370 | Arguments: |
| 371 | |
| 372 | PtmFdOut - Supplies a pointer to receive the master file descriptor. |
| 373 | |
| 374 | PtsFdOut - Supplies a pointer to receive the subordinate file descriptor. |
| 375 | |
| 376 | UseMasterEndpoint - Supplies a flag indicating whether the master or |
| 377 | subordinate endpoint should be set as the controlling terminal. |
| 378 | |
| 379 | Return Value: |
| 380 | |
| 381 | Returns pid of newly forked process to the parent, zero to the child and |
| 382 | <0 on error. |
| 383 | |
| 384 | --*/ |
| 385 | |
| 386 | { |
| 387 | |
| 388 | pid_t ChildPid; |
| 389 | int PtmFd; |
| 390 | int PtsFd; |
| 391 | int Result; |
| 392 | int SerialNumber; |
| 393 | pid_t SessionId; |
| 394 | |
| 395 | // |
| 396 | // Initialize locals |
| 397 | // |
| 398 | |
| 399 | ChildPid = -1; |
| 400 | PtmFd = -1; |
| 401 | PtsFd = -1; |
| 402 | |
| 403 | // |
| 404 | // Open Master-Subordinate |
| 405 | // |
| 406 | |
| 407 | LxtCheckErrno(OpenMasterSubordinate(&PtmFd, &PtsFd, NULL, &SerialNumber)); |
| 408 | LxtLogInfo("Master opened at FD:%d", PtmFd); |
| 409 | LxtLogInfo("Subordinate Serial Number: %d", SerialNumber); |
| 410 | LxtLogInfo("Subordinate opened at FD:%d", PtsFd); |
| 411 | |
| 412 | LxtCheckErrno(ChildPid = fork()); |
| 413 | if (ChildPid == 0) |
| 414 | { |
| 415 | |
| 416 | // |
| 417 | // Move to a new session |
| 418 | // |
| 419 | |
| 420 | LxtCheckErrno(SessionId = setsid()); |
| 421 | |
| 422 | // |
| 423 | // Set the fd as the controlling terminal for the session, calling |
| 424 | // again should not fail. |
| 425 | // |
| 426 | |
| 427 | LxtCheckErrno(ioctl((UseMasterEndpoint) ? PtmFd : PtsFd, TIOCSCTTY, (char*)NULL)); |
| 428 | LxtCheckErrno(ioctl((UseMasterEndpoint) ? PtmFd : PtsFd, TIOCSCTTY, (char*)NULL)); |
| 429 | } |
| 430 | |
| 431 | *PtmFdOut = PtmFd; |
| 432 | PtmFd = -1; |
| 433 | *PtsFdOut = PtsFd; |
| 434 | PtsFd = -1; |
| 435 | |
| 436 | ErrorExit: |
| 437 | if (PtmFd != -1) |
| 438 | { |
| 439 | close(PtmFd); |
| 440 | } |
| 441 | |
| 442 | if (PtsFd != -1) |
| 443 | { |
| 444 | close(PtsFd); |
| 445 | } |
| 446 | |
| 447 | return ChildPid; |
| 448 | } |
| 449 | |
| 450 | pid_t ForkPtyMaster(int* PtmFdOut, int* PtsFdOut) |
| 451 | |
| 452 | /*++ |
| 453 | |
| 454 | Routine Description: |
| 455 | |
| 456 | This routine sets up a new process as a foreground process using PtmFd as |
| 457 | its controlling terminal. |
| 458 | |
| 459 | Arguments: |
| 460 | |
| 461 | PtmFdOut - Supplies a pointer to receive the master file descriptor. |
| 462 | |
| 463 | PtsFdOut - Supplies a pointer to receive the subordinate file descriptor. |
| 464 | |
| 465 | Return Value: |
| 466 | |
| 467 | Returns pid of newly forked process to the parent, zero to the child and |
| 468 | <0 on error. |
| 469 | |
| 470 | --*/ |
| 471 | |
| 472 | { |
| 473 | |
| 474 | return ForkPtyCommon(PtmFdOut, PtsFdOut, true); |
| 475 | } |
| 476 | |
| 477 | int RawInit(int Fd) |
| 478 | |
| 479 | /*++ |
| 480 | |
| 481 | Routine Description: |
| 482 | |
| 483 | This routine will use termios to set the FD for raw input/output. |
| 484 | |
| 485 | Arguments: |
| 486 | |
| 487 | Fd - Supplies the FD. |
| 488 | |
| 489 | Return Value: |
| 490 | |
| 491 | 0 on success, error code on failure. |
| 492 | |
| 493 | --*/ |
| 494 | |
| 495 | { |
| 496 | |
| 497 | cc_t ControlArray[NCCS]; |
| 498 | int Result; |
| 499 | |
| 500 | // |
| 501 | // After the switch to RAW mode want no timeout and a minimum of 1 char. |
| 502 | // |
| 503 | |
| 504 | Result = TerminalSettingsGetControlArray(Fd, ControlArray); |
| 505 | if (Result < 0) |
| 506 | { |
| 507 | goto ErrorExit; |
| 508 | } |
| 509 | |
| 510 | ControlArray[VTIME] = 0; |
| 511 | ControlArray[VMIN] = 1; |
| 512 | Result = TerminalSettingsSetControlArray(Fd, ControlArray); |
| 513 | if (Result < 0) |
| 514 | { |
| 515 | goto ErrorExit; |
| 516 | } |
| 517 | |
| 518 | // |
| 519 | // Disable echo, cannon and other flags. Set TOSTOP so signals are |
| 520 | // generated by default. |
| 521 | // |
| 522 | |
| 523 | Result = TerminalSettingsSetLocalFlags(Fd, TOSTOP); |
| 524 | |
| 525 | ErrorExit: |
| 526 | return Result; |
| 527 | } |
| 528 | |
| 529 | int SimpleReadWriteCheck(int PtmFd, int PtsFd) |
| 530 | |
| 531 | /*++ |
| 532 | |
| 533 | Routine Description: |
| 534 | |
| 535 | This routine performs a simple read/write check on the master-subordinate |
| 536 | pseudo terminal pair. The check is as follows: |
| 537 | - Write to the master. |
| 538 | - Read from the subordinate. Read data should match the data written |
| 539 | by master. |
| 540 | - Write to the subordinate. |
| 541 | - Read data from the master. Data read from the mater should match |
| 542 | what was written by the subordinate. |
| 543 | |
| 544 | Arguments: |
| 545 | |
| 546 | PtmFd - Supplies the FD for the master. |
| 547 | |
| 548 | PtsFd - Supplies the FD for the subordinate. |
| 549 | |
| 550 | Return Value: |
| 551 | |
| 552 | 0 on success, error code on failure. |
| 553 | |
| 554 | --*/ |
| 555 | |
| 556 | { |
| 557 | |
| 558 | return SimpleReadWriteCheckEx(PtmFd, PtsFd, SimpleReadWriteForeground); |
| 559 | } |
| 560 | |
| 561 | int SimpleReadWriteCheckEx(int PtmFd, int PtsFd, SIMPLE_READ_WRITE_MODE Mode) |
| 562 | |
| 563 | /*++ |
| 564 | |
| 565 | Routine Description: |
| 566 | |
| 567 | This routine performs a simple read/write check on the master-subordinate |
| 568 | pseudo terminal pair. The check is as follows: |
| 569 | - Write to the master. |
| 570 | - Read from the subordinate. Read data should match the data written |
| 571 | by master. |
| 572 | - Write to the subordinate. |
| 573 | - Read data from the master. Data read from the mater should match |
| 574 | what was written by the subordinate. |
| 575 | |
| 576 | Arguments: |
| 577 | |
| 578 | PtmFd - Supplies the FD for the master. |
| 579 | |
| 580 | PtsFd - Supplies the FD for the subordinate. |
| 581 | |
| 582 | Mode - Supplies a value indicating whether this access is from foreground |
| 583 | or background, and whether signals are enabled. |
| 584 | |
| 585 | Return Value: |
| 586 | |
| 587 | 0 on success, error code on failure. |
| 588 | |
| 589 | --*/ |
| 590 | |
| 591 | { |
| 592 | |
| 593 | int BytesReadWrite; |
| 594 | int ExpectedResult; |
| 595 | const char* Greetings = "Hello there!!\n"; |
| 596 | size_t GreetingsLength; |
| 597 | int PacketMode; |
| 598 | int PtmFlags; |
| 599 | char ReadBuffer[1024]; |
| 600 | char* ReadBufferMaster; |
| 601 | const char* Reply = "Hi, how are you?\r"; |
| 602 | size_t ReplyLength; |
| 603 | int Result; |
| 604 | struct termios TiosMaster; |
| 605 | struct termios TiosSubordinate; |
| 606 | |
| 607 | LxtCheckErrno(PtmFlags = fcntl(PtmFd, F_GETFL, 0)); |
| 608 | |
| 609 | memset(&TiosMaster, 0, sizeof(TiosMaster)); |
| 610 | LxtCheckErrno(tcgetattr(PtmFd, &TiosMaster)); |
| 611 | memset(&TiosSubordinate, 0, sizeof(TiosSubordinate)); |
| 612 | LxtCheckErrno(tcgetattr(PtsFd, &TiosSubordinate)); |
| 613 | LxtCheckMemoryEqual(&TiosMaster, &TiosSubordinate, sizeof(TiosMaster)); |
| 614 | GreetingsLength = strlen(Greetings); |
| 615 | ReplyLength = strlen(Reply); |
| 616 | if (TiosSubordinate.c_lflag & ICANON) |
| 617 | { |
| 618 | LxtLogInfo("Canonical mode."); |
| 619 | } |
| 620 | else |
| 621 | { |
| 622 | LxtLogInfo("Raw mode."); |
| 623 | --GreetingsLength; |
| 624 | --ReplyLength; |
| 625 | } |
| 626 | |
| 627 | LxtCheckErrno(ioctl(PtmFd, TIOCGPKT, &PacketMode)); |
| 628 | if (PacketMode != 0) |
| 629 | { |
| 630 | LxtLogInfo("Packet mode enabled."); |
| 631 | ReadBufferMaster = &ReadBuffer[1]; |
| 632 | } |
| 633 | else |
| 634 | { |
| 635 | ReadBufferMaster = &ReadBuffer[0]; |
| 636 | } |
| 637 | |
| 638 | // |
| 639 | // Write the greetings message to the master. |
| 640 | // |
| 641 | |
| 642 | LxtLogInfo("Writing to master"); |
| 643 | ExpectedResult = GreetingsLength; |
| 644 | LxtCheckErrno(BytesReadWrite = write(PtmFd, Greetings, ExpectedResult)); |
| 645 | LxtCheckFnResults("write", BytesReadWrite, ExpectedResult); |
| 646 | LxtLogInfo("Master(FD:%d) --> subordinate(FD:%d):%*s", PtmFd, PtsFd, GreetingsLength, Greetings); |
| 647 | |
| 648 | // |
| 649 | // Canonical mode should echo the input back to the master with a |
| 650 | // carriage-return and newline. |
| 651 | // |
| 652 | |
| 653 | if (TiosSubordinate.c_lflag & ICANON) |
| 654 | { |
| 655 | LxtCheckErrno(BytesReadWrite = read(PtmFd, ReadBuffer, sizeof(ReadBuffer))); |
| 656 | if (PacketMode != 0) |
| 657 | { |
| 658 | LxtCheckEqual(ReadBuffer[0], 0, "%hhd"); |
| 659 | if (BytesReadWrite > 0) |
| 660 | { |
| 661 | BytesReadWrite -= 1; |
| 662 | } |
| 663 | } |
| 664 | |
| 665 | ReadBufferMaster[BytesReadWrite] = '\0'; |
| 666 | LxtLogInfo("Echo received by master(FD:%d):%s", PtmFd, ReadBufferMaster); |
| 667 | LxtLogInfo("Last character = %d [\\n = %d, \\r = %d]", ReadBufferMaster[BytesReadWrite - 1], '\n', '\r'); |
| 668 | LxtCheckFnResults("read", BytesReadWrite, (ExpectedResult + 1)); |
| 669 | if ((ReadBufferMaster[BytesReadWrite - 1] != '\n') || (ReadBufferMaster[BytesReadWrite - 2] != '\r')) |
| 670 | { |
| 671 | LxtLogError("Echo to master(FD:%d) does not end with \r\n.", PtmFd); |
| 672 | |
| 673 | Result = -1; |
| 674 | goto ErrorExit; |
| 675 | } |
| 676 | |
| 677 | ReadBufferMaster[BytesReadWrite - 2] = '\n'; |
| 678 | if (memcmp(ReadBufferMaster, Greetings, ExpectedResult) != 0) |
| 679 | { |
| 680 | LxtLogError( |
| 681 | "Echo to master(FD:%d) does not match what was " |
| 682 | "written.", |
| 683 | PtmFd); |
| 684 | |
| 685 | Result = -1; |
| 686 | goto ErrorExit; |
| 687 | } |
| 688 | } |
| 689 | |
| 690 | // |
| 691 | // Read from subordinate. |
| 692 | // |
| 693 | |
| 694 | memset(ReadBuffer, 0, sizeof(ReadBuffer)); |
| 695 | LxtLogInfo("Reading from subordinate"); |
| 696 | if (Mode == SimpleReadWriteForeground) |
| 697 | { |
| 698 | LxtCheckErrno(BytesReadWrite = read(PtsFd, ReadBuffer, sizeof(ReadBuffer))); |
| 699 | LxtLogInfo("Message received by subordinate(FD:%d):%s", PtsFd, ReadBuffer); |
| 700 | LxtLogInfo("Last character = %d [\\n = %d, \\r = %d]", ReadBuffer[BytesReadWrite - 1], '\n', '\r'); |
| 701 | LxtCheckFnResults("read", BytesReadWrite, ExpectedResult); |
| 702 | |
| 703 | // |
| 704 | // Compare the messages. |
| 705 | // |
| 706 | |
| 707 | if (memcmp(ReadBuffer, Greetings, BytesReadWrite) != 0) |
| 708 | { |
| 709 | LxtLogError( |
| 710 | "Data read from subordinate(FD:%d) does not match what was " |
| 711 | "written by master(FD:%d).", |
| 712 | PtsFd, |
| 713 | PtmFd); |
| 714 | Result = -1; |
| 715 | goto ErrorExit; |
| 716 | } |
| 717 | } |
| 718 | else if ((Mode == SimpleReadWriteBackgroundSignal) || (Mode == SimpleReadWriteBackgroundSignalNoStop)) |
| 719 | { |
| 720 | |
| 721 | LxtCheckErrnoFailure(BytesReadWrite = read(PtsFd, ReadBuffer, sizeof(ReadBuffer)), EINTR); |
| 722 | } |
| 723 | else |
| 724 | { |
| 725 | LxtCheckErrnoFailure(BytesReadWrite = read(PtsFd, ReadBuffer, sizeof(ReadBuffer)), EIO); |
| 726 | } |
| 727 | |
| 728 | // |
| 729 | // So far so good, now write a response from the subordinate. |
| 730 | // |
| 731 | |
| 732 | LxtLogInfo("Subordinate(FD:%d) --> master(FD:%d):%*s", PtsFd, PtmFd, ReplyLength, Reply); |
| 733 | |
| 734 | ExpectedResult = ReplyLength; |
| 735 | if (Mode != SimpleReadWriteBackgroundSignal) |
| 736 | { |
| 737 | LxtCheckErrno(BytesReadWrite = write(PtsFd, Reply, ExpectedResult)); |
| 738 | LxtCheckFnResults("write", BytesReadWrite, ExpectedResult); |
| 739 | } |
| 740 | else |
| 741 | { |
| 742 | LxtCheckErrnoFailure(BytesReadWrite = write(PtsFd, Reply, ExpectedResult), EINTR); |
| 743 | BytesReadWrite = ExpectedResult; |
| 744 | ExpectedResult = 0; |
| 745 | } |
| 746 | |
| 747 | // |
| 748 | // Read from master. |
| 749 | // |
| 750 | |
| 751 | LxtLogInfo("Reading from master"); |
| 752 | memset(ReadBuffer, 0, sizeof(ReadBuffer)); |
| 753 | if (Mode != SimpleReadWriteBackgroundSignal) |
| 754 | { |
| 755 | LxtCheckErrno(BytesReadWrite = read(PtmFd, ReadBuffer, sizeof(ReadBuffer))); |
| 756 | if (PacketMode != 0) |
| 757 | { |
| 758 | LxtCheckEqual(ReadBuffer[0], 0, "%hhd"); |
| 759 | if (BytesReadWrite > 0) |
| 760 | { |
| 761 | BytesReadWrite -= 1; |
| 762 | } |
| 763 | } |
| 764 | |
| 765 | ReadBufferMaster[BytesReadWrite] = '\0'; |
| 766 | LxtLogInfo("Reply received by master(FD:%d):%s", PtmFd, ReadBufferMaster); |
| 767 | LxtLogInfo("Last character = %d [\\n = %d, \\r = %d]", ReadBufferMaster[BytesReadWrite - 1], '\n', '\r'); |
| 768 | } |
| 769 | else |
| 770 | { |
| 771 | LxtCheckErrno(fcntl(PtmFd, F_SETFL, (PtmFlags | O_NONBLOCK))); |
| 772 | LxtCheckErrnoFailure(BytesReadWrite = read(PtmFd, ReadBuffer, BytesReadWrite), EAGAIN); |
| 773 | BytesReadWrite = 0; |
| 774 | } |
| 775 | |
| 776 | LxtCheckFnResults("read", BytesReadWrite, ExpectedResult); |
| 777 | |
| 778 | // |
| 779 | // Compare the messages. |
| 780 | // |
| 781 | |
| 782 | if (memcmp(ReadBufferMaster, Reply, BytesReadWrite) != 0) |
| 783 | { |
| 784 | LxtLogError( |
| 785 | "Data read from master(FD:%d) does not match what was " |
| 786 | "written by subordinate(FD:%d).", |
| 787 | PtmFd, |
| 788 | PtsFd); |
| 789 | |
| 790 | Result = -1; |
| 791 | goto ErrorExit; |
| 792 | } |
| 793 | |
| 794 | ErrorExit: |
| 795 | fcntl(PtmFd, F_SETFL, PtmFlags); |
| 796 | return Result; |
| 797 | } |
| 798 | |
| 799 | int TerminalSettingsGet(int Fd, cc_t* ControlArrayOut, tcflag_t* ControlFlagsOut, tcflag_t* InputFlagsOut, tcflag_t* LocalFlagsOut, tcflag_t* OutputFlagsOut) |
| 800 | |
| 801 | /*++ |
| 802 | |
| 803 | Routine Description: |
| 804 | |
| 805 | This routine will use termios to get the settings for the FD. |
| 806 | All of the *Out variables are optional. |
| 807 | |
| 808 | Arguments: |
| 809 | |
| 810 | Fd - Supplies the FD. |
| 811 | |
| 812 | ControlArrayOut - Supplies an optional pointer to receive the NCCS element |
| 813 | control array. |
| 814 | |
| 815 | ControlFlagsOut - Supplies an optional pointer to receive the terminal |
| 816 | control flags. |
| 817 | |
| 818 | InputFlagsOut - Supplies an optional pointer to receive the terminal input |
| 819 | flags. |
| 820 | |
| 821 | LocalFlagsOut - Supplies an optional pointer to receive the terminal local |
| 822 | flags. |
| 823 | |
| 824 | OutputFlagsOut - Supplies an optional pointer to receive the terminal |
| 825 | output flags. |
| 826 | |
| 827 | Return Value: |
| 828 | |
| 829 | 0 on success, error code on failure. |
| 830 | |
| 831 | --*/ |
| 832 | |
| 833 | { |
| 834 | |
| 835 | int Result; |
| 836 | struct termios Tios; |
| 837 | |
| 838 | Result = tcgetattr(Fd, &Tios); |
| 839 | if (Result < 0) |
| 840 | { |
| 841 | goto ErrorExit; |
| 842 | } |
| 843 | |
| 844 | if (ControlArrayOut != NULL) |
| 845 | { |
| 846 | memcpy(ControlArrayOut, Tios.c_cc, NCCS * sizeof(cc_t)); |
| 847 | } |
| 848 | |
| 849 | if (ControlFlagsOut != NULL) |
| 850 | { |
| 851 | *ControlFlagsOut = Tios.c_cflag; |
| 852 | } |
| 853 | |
| 854 | if (InputFlagsOut != NULL) |
| 855 | { |
| 856 | *InputFlagsOut = Tios.c_iflag; |
| 857 | } |
| 858 | |
| 859 | if (LocalFlagsOut != NULL) |
| 860 | { |
| 861 | *LocalFlagsOut = Tios.c_lflag; |
| 862 | } |
| 863 | |
| 864 | if (OutputFlagsOut != NULL) |
| 865 | { |
| 866 | *OutputFlagsOut = Tios.c_oflag; |
| 867 | } |
| 868 | |
| 869 | ErrorExit: |
| 870 | return Result; |
| 871 | } |
| 872 | |
| 873 | int TerminalSettingsGetControlArray(int Fd, cc_t* ControlArrayOut) |
| 874 | |
| 875 | /*++ |
| 876 | |
| 877 | Routine Description: |
| 878 | |
| 879 | This routine will use termios to get the NCCS element control array. |
| 880 | |
| 881 | Arguments: |
| 882 | |
| 883 | Fd - Supplies the FD. |
| 884 | |
| 885 | ControlArrayOut - Supplies a pointer to receive the NCCS element control |
| 886 | array. |
| 887 | |
| 888 | Return Value: |
| 889 | |
| 890 | 0 on success, error code on failure. |
| 891 | |
| 892 | --*/ |
| 893 | |
| 894 | { |
| 895 | |
| 896 | return TerminalSettingsGet(Fd, ControlArrayOut, NULL, NULL, NULL, NULL); |
| 897 | } |
| 898 | |
| 899 | int TerminalSettingsGetControlFlags(int Fd, tcflag_t* ControlFlagsOut) |
| 900 | |
| 901 | /*++ |
| 902 | |
| 903 | Routine Description: |
| 904 | |
| 905 | This routine will use termios to get the local flags for the FD. |
| 906 | |
| 907 | Arguments: |
| 908 | |
| 909 | Fd - Supplies the FD. |
| 910 | |
| 911 | ControlFlagsOut - Supplies a pointer to receive the terminal control flags. |
| 912 | |
| 913 | Return Value: |
| 914 | |
| 915 | 0 on success, error code on failure. |
| 916 | |
| 917 | --*/ |
| 918 | |
| 919 | { |
| 920 | |
| 921 | return TerminalSettingsGet(Fd, NULL, ControlFlagsOut, NULL, NULL, NULL); |
| 922 | } |
| 923 | |
| 924 | int TerminalSettingsGetInputFlags(int Fd, tcflag_t* InputFlagsOut) |
| 925 | |
| 926 | /*++ |
| 927 | |
| 928 | Routine Description: |
| 929 | |
| 930 | This routine will use termios to get the input flags for the FD. |
| 931 | |
| 932 | Arguments: |
| 933 | |
| 934 | Fd - Supplies the FD. |
| 935 | |
| 936 | InputFlagsOut - Supplies a pointer to receive the terminal input flags. |
| 937 | |
| 938 | Return Value: |
| 939 | |
| 940 | 0 on success, error code on failure. |
| 941 | |
| 942 | --*/ |
| 943 | |
| 944 | { |
| 945 | |
| 946 | return TerminalSettingsGet(Fd, NULL, NULL, InputFlagsOut, NULL, NULL); |
| 947 | } |
| 948 | |
| 949 | int TerminalSettingsGetLocalFlags(int Fd, tcflag_t* LocalFlagsOut) |
| 950 | |
| 951 | /*++ |
| 952 | |
| 953 | Routine Description: |
| 954 | |
| 955 | This routine will use termios to get the local flags for the FD. |
| 956 | |
| 957 | Arguments: |
| 958 | |
| 959 | Fd - Supplies the FD. |
| 960 | |
| 961 | LocalFlagsOut - Supplies a pointer to receive the terminal local flags. |
| 962 | |
| 963 | Return Value: |
| 964 | |
| 965 | 0 on success, error code on failure. |
| 966 | |
| 967 | --*/ |
| 968 | |
| 969 | { |
| 970 | |
| 971 | return TerminalSettingsGet(Fd, NULL, NULL, NULL, LocalFlagsOut, NULL); |
| 972 | } |
| 973 | |
| 974 | int TerminalSettingsGetOutputFlags(int Fd, tcflag_t* OutputFlagsOut) |
| 975 | |
| 976 | /*++ |
| 977 | |
| 978 | Routine Description: |
| 979 | |
| 980 | This routine will use termios to get the output flags for the FD. |
| 981 | |
| 982 | Arguments: |
| 983 | |
| 984 | Fd - Supplies the FD. |
| 985 | |
| 986 | OutputFlagsOut - Supplies a pointer to receive the terminal output flags. |
| 987 | |
| 988 | Return Value: |
| 989 | |
| 990 | 0 on success, error code on failure. |
| 991 | |
| 992 | --*/ |
| 993 | |
| 994 | { |
| 995 | |
| 996 | return TerminalSettingsGet(Fd, NULL, NULL, NULL, NULL, OutputFlagsOut); |
| 997 | } |
| 998 | |
| 999 | int TerminalSettingsSet(int Fd, cc_t* ControlArray, tcflag_t ControlFlags, tcflag_t InputFlags, tcflag_t LocalFlags, tcflag_t OutputFlags) |
| 1000 | |
| 1001 | /*++ |
| 1002 | |
| 1003 | Routine Description: |
| 1004 | |
| 1005 | This routine will use termios to update the settings for the FD. |
| 1006 | |
| 1007 | Arguments: |
| 1008 | |
| 1009 | Fd - Supplies the FD. |
| 1010 | |
| 1011 | ControlArray - Supplies a pointer to the new NCCS element control array. |
| 1012 | |
| 1013 | ControlFlags - Supplies the new terminal control flags. |
| 1014 | |
| 1015 | InputFlagsOut - Supplies the new terminal input flags. |
| 1016 | |
| 1017 | LocalFlagsOut - Supplies the new terminal local flags. |
| 1018 | |
| 1019 | OutputFlagsOut - Supplies the new terminal output flags. |
| 1020 | |
| 1021 | Return Value: |
| 1022 | |
| 1023 | 0 on success, error code on failure. |
| 1024 | |
| 1025 | --*/ |
| 1026 | |
| 1027 | { |
| 1028 | |
| 1029 | int Result; |
| 1030 | struct termios Tios = {0}; |
| 1031 | |
| 1032 | memcpy(Tios.c_cc, ControlArray, NCCS * sizeof(cc_t)); |
| 1033 | Tios.c_cflag = ControlFlags; |
| 1034 | Tios.c_iflag = InputFlags; |
| 1035 | Tios.c_lflag = LocalFlags; |
| 1036 | Tios.c_oflag = OutputFlags; |
| 1037 | Result = tcsetattr(Fd, TCSANOW, &Tios); |
| 1038 | return Result; |
| 1039 | } |
| 1040 | |
| 1041 | int TerminalSettingsSetControlArray(int Fd, cc_t* ControlArray) |
| 1042 | |
| 1043 | /*++ |
| 1044 | |
| 1045 | Routine Description: |
| 1046 | |
| 1047 | This routine will use termios to set the control array for the FD. |
| 1048 | |
| 1049 | Arguments: |
| 1050 | |
| 1051 | Fd - Supplies the FD. |
| 1052 | |
| 1053 | ControlArray - Supplies the new control array. |
| 1054 | |
| 1055 | Return Value: |
| 1056 | |
| 1057 | 0 on success, error code on failure. |
| 1058 | |
| 1059 | --*/ |
| 1060 | |
| 1061 | { |
| 1062 | |
| 1063 | int Result; |
| 1064 | struct termios Tios = {0}; |
| 1065 | |
| 1066 | Result = TerminalSettingsGet(Fd, NULL, &Tios.c_cflag, &Tios.c_iflag, &Tios.c_lflag, &Tios.c_oflag); |
| 1067 | if (Result < 0) |
| 1068 | { |
| 1069 | goto ErrorExit; |
| 1070 | } |
| 1071 | |
| 1072 | Result = TerminalSettingsSet(Fd, ControlArray, Tios.c_cflag, Tios.c_iflag, Tios.c_lflag, Tios.c_oflag); |
| 1073 | |
| 1074 | ErrorExit: |
| 1075 | return Result; |
| 1076 | } |
| 1077 | |
| 1078 | int TerminalSettingsSetControlFlags(int Fd, tcflag_t ControlFlags) |
| 1079 | |
| 1080 | /*++ |
| 1081 | |
| 1082 | Routine Description: |
| 1083 | |
| 1084 | This routine will use termios to set the control flags for the FD. |
| 1085 | |
| 1086 | Arguments: |
| 1087 | |
| 1088 | Fd - Supplies the FD. |
| 1089 | |
| 1090 | ControlFlags - Supplies the new control flags. |
| 1091 | |
| 1092 | Return Value: |
| 1093 | |
| 1094 | 0 on success, error code on failure. |
| 1095 | |
| 1096 | --*/ |
| 1097 | |
| 1098 | { |
| 1099 | |
| 1100 | int Result; |
| 1101 | struct termios Tios = {0}; |
| 1102 | |
| 1103 | Result = TerminalSettingsGet(Fd, Tios.c_cc, NULL, &Tios.c_iflag, &Tios.c_lflag, &Tios.c_oflag); |
| 1104 | if (Result < 0) |
| 1105 | { |
| 1106 | goto ErrorExit; |
| 1107 | } |
| 1108 | |
| 1109 | Result = TerminalSettingsSet(Fd, Tios.c_cc, ControlFlags, Tios.c_iflag, Tios.c_lflag, Tios.c_oflag); |
| 1110 | |
| 1111 | ErrorExit: |
| 1112 | return Result; |
| 1113 | } |
| 1114 | |
| 1115 | int TerminalSettingsSetInputFlags(int Fd, tcflag_t InputFlags) |
| 1116 | |
| 1117 | /*++ |
| 1118 | |
| 1119 | Routine Description: |
| 1120 | |
| 1121 | This routine will use termios to set the input flags for the FD. |
| 1122 | |
| 1123 | Arguments: |
| 1124 | |
| 1125 | Fd - Supplies the FD. |
| 1126 | |
| 1127 | InputFlags - Supplies the new input flags. |
| 1128 | |
| 1129 | Return Value: |
| 1130 | |
| 1131 | 0 on success, error code on failure. |
| 1132 | |
| 1133 | --*/ |
| 1134 | |
| 1135 | { |
| 1136 | |
| 1137 | int Result; |
| 1138 | struct termios Tios = {0}; |
| 1139 | |
| 1140 | Result = TerminalSettingsGet(Fd, Tios.c_cc, &Tios.c_cflag, NULL, &Tios.c_lflag, &Tios.c_oflag); |
| 1141 | if (Result < 0) |
| 1142 | { |
| 1143 | goto ErrorExit; |
| 1144 | } |
| 1145 | |
| 1146 | Result = TerminalSettingsSet(Fd, Tios.c_cc, Tios.c_cflag, InputFlags, Tios.c_lflag, Tios.c_oflag); |
| 1147 | |
| 1148 | ErrorExit: |
| 1149 | return Result; |
| 1150 | } |
| 1151 | |
| 1152 | int TerminalSettingsSetLocalFlags(int Fd, tcflag_t LocalFlags) |
| 1153 | |
| 1154 | /*++ |
| 1155 | |
| 1156 | Routine Description: |
| 1157 | |
| 1158 | This routine will use termios to set the local flags for the FD. |
| 1159 | |
| 1160 | Arguments: |
| 1161 | |
| 1162 | Fd - Supplies the FD. |
| 1163 | |
| 1164 | LocalFlags - Supplies the new local flags. |
| 1165 | |
| 1166 | Return Value: |
| 1167 | |
| 1168 | 0 on success, error code on failure. |
| 1169 | |
| 1170 | --*/ |
| 1171 | |
| 1172 | { |
| 1173 | |
| 1174 | int Result; |
| 1175 | struct termios Tios = {0}; |
| 1176 | |
| 1177 | Result = TerminalSettingsGet(Fd, Tios.c_cc, &Tios.c_cflag, &Tios.c_iflag, NULL, &Tios.c_oflag); |
| 1178 | if (Result < 0) |
| 1179 | { |
| 1180 | goto ErrorExit; |
| 1181 | } |
| 1182 | |
| 1183 | Result = TerminalSettingsSet(Fd, Tios.c_cc, Tios.c_cflag, Tios.c_iflag, LocalFlags, Tios.c_oflag); |
| 1184 | |
| 1185 | ErrorExit: |
| 1186 | return Result; |
| 1187 | } |
| 1188 | |
| 1189 | int TerminalSettingsSetOutputFlags(int Fd, tcflag_t OutputFlags) |
| 1190 | |
| 1191 | /*++ |
| 1192 | |
| 1193 | Routine Description: |
| 1194 | |
| 1195 | This routine will use termios to set the output flags for the FD. |
| 1196 | |
| 1197 | Arguments: |
| 1198 | |
| 1199 | Fd - Supplies the FD. |
| 1200 | |
| 1201 | OutputFlags - Supplies the new output flags. |
| 1202 | |
| 1203 | Return Value: |
| 1204 | |
| 1205 | 0 on success, error code on failure. |
| 1206 | |
| 1207 | --*/ |
| 1208 | |
| 1209 | { |
| 1210 | |
| 1211 | int Result; |
| 1212 | struct termios Tios = {0}; |
| 1213 | |
| 1214 | Result = TerminalSettingsGet(Fd, Tios.c_cc, &Tios.c_cflag, &Tios.c_iflag, &Tios.c_lflag, NULL); |
| 1215 | if (Result < 0) |
| 1216 | { |
| 1217 | goto ErrorExit; |
| 1218 | } |
| 1219 | |
| 1220 | Result = TerminalSettingsSet(Fd, Tios.c_cc, Tios.c_cflag, Tios.c_iflag, Tios.c_lflag, OutputFlags); |
| 1221 | |
| 1222 | ErrorExit: |
| 1223 | return Result; |
| 1224 | } |
| 1225 | |
| 1226 | int WriteReadFdCommon(int WriteFd, size_t WriteSizes[], size_t NumWriteSizes, int ReadFd, size_t ReadSizes[], size_t NumReadSizes) |
| 1227 | |
| 1228 | /*++ |
| 1229 | |
| 1230 | Routine Description: |
| 1231 | |
| 1232 | This routine performs write operation of given sizes to the WriteFd and |
| 1233 | reads from the ReadFd for the specified sizes. Each write is expected to |
| 1234 | succeed for the given size and each read is expected to succeed for the |
| 1235 | given size. This routine will also validate that the data read aligns up |
| 1236 | with the data written. All the writes will be performed before any of the |
| 1237 | reads. |
| 1238 | |
| 1239 | Arguments: |
| 1240 | |
| 1241 | WriteFd - Supplies the FD on which the write operation should be called. |
| 1242 | |
| 1243 | WriteSizes - Supplies the array of sizes for the write operation.. |
| 1244 | |
| 1245 | NumWriteSizes - Supplies the number of elements in the write size array. |
| 1246 | |
| 1247 | ReadFd - Supplies the FD on which the read operation should be called. |
| 1248 | |
| 1249 | ReadSizes - Supplies the array of sizes for the read operation.. |
| 1250 | |
| 1251 | NumReadSizes - Supplies the number of elements in the read size array. |
| 1252 | |
| 1253 | Return Value: |
| 1254 | |
| 1255 | 0 on success, error code on failure. |
| 1256 | --*/ |
| 1257 | |
| 1258 | { |
| 1259 | |
| 1260 | char* AccumulatedReadBuffer; |
| 1261 | char* AccumulatedWriteBuffer; |
| 1262 | ssize_t BytesReadWrite; |
| 1263 | size_t Itr; |
| 1264 | size_t Offset; |
| 1265 | char* ReadBuffer; |
| 1266 | int Result; |
| 1267 | size_t TotalReadSize; |
| 1268 | size_t TotalWriteSize; |
| 1269 | char* WriteBuffer; |
| 1270 | |
| 1271 | AccumulatedReadBuffer = NULL; |
| 1272 | AccumulatedWriteBuffer = NULL; |
| 1273 | ReadBuffer = NULL; |
| 1274 | WriteBuffer = NULL; |
| 1275 | TotalWriteSize = 0; |
| 1276 | TotalReadSize = 0; |
| 1277 | |
| 1278 | // |
| 1279 | // Calculate the size of total number of bytes to be written and read. |
| 1280 | // |
| 1281 | |
| 1282 | for (Itr = 0; Itr < NumWriteSizes; Itr += 1) |
| 1283 | { |
| 1284 | TotalWriteSize += WriteSizes[Itr]; |
| 1285 | } |
| 1286 | |
| 1287 | for (Itr = 0; Itr < NumReadSizes; Itr += 1) |
| 1288 | { |
| 1289 | TotalReadSize += ReadSizes[Itr]; |
| 1290 | } |
| 1291 | |
| 1292 | // |
| 1293 | // Allocate memory to hold the data for the accumulated writes and reads. |
| 1294 | // |
| 1295 | |
| 1296 | AccumulatedWriteBuffer = calloc(TotalWriteSize, 1); |
| 1297 | if (AccumulatedWriteBuffer == NULL) |
| 1298 | { |
| 1299 | LxtLogError("Failed to allocate memory for Write Buffer"); |
| 1300 | Result = LXT_RESULT_FAILURE; |
| 1301 | goto ErrorExit; |
| 1302 | } |
| 1303 | |
| 1304 | AccumulatedReadBuffer = calloc(TotalReadSize, 1); |
| 1305 | if (AccumulatedReadBuffer == NULL) |
| 1306 | { |
| 1307 | LxtLogError("Failed to allocate memory for Read Buffer"); |
| 1308 | Result = LXT_RESULT_FAILURE; |
| 1309 | goto ErrorExit; |
| 1310 | } |
| 1311 | |
| 1312 | // |
| 1313 | // First perform all the writes. |
| 1314 | // |
| 1315 | |
| 1316 | Offset = 0; |
| 1317 | for (Itr = 0; Itr < NumWriteSizes; Itr += 1) |
| 1318 | { |
| 1319 | WriteBuffer = calloc(WriteSizes[Itr], 1); |
| 1320 | if (WriteBuffer == NULL) |
| 1321 | { |
| 1322 | Result = ENOMEM; |
| 1323 | goto ErrorExit; |
| 1324 | } |
| 1325 | |
| 1326 | LxtCheckErrno(GetRandomMessage(WriteBuffer, WriteSizes[Itr], FALSE)); |
| 1327 | LxtCheckErrno(BytesReadWrite = write(WriteFd, WriteBuffer, WriteSizes[Itr])); |
| 1328 | |
| 1329 | LxtCheckFnResults("write", BytesReadWrite, (ssize_t)WriteSizes[Itr]); |
| 1330 | memcpy(&AccumulatedWriteBuffer[Offset], WriteBuffer, WriteSizes[Itr]); |
| 1331 | |
| 1332 | Offset += WriteSizes[Itr]; |
| 1333 | free(WriteBuffer); |
| 1334 | WriteBuffer = NULL; |
| 1335 | } |
| 1336 | |
| 1337 | // |
| 1338 | // On Ubuntu16 pty processing is asynchronous so pause a second to give the |
| 1339 | // writes time to be processed. |
| 1340 | // |
| 1341 | |
| 1342 | sleep(1); |
| 1343 | |
| 1344 | // |
| 1345 | // Now read the data previously written. |
| 1346 | // |
| 1347 | |
| 1348 | Offset = 0; |
| 1349 | for (Itr = 0; Itr < NumReadSizes; Itr += 1) |
| 1350 | { |
| 1351 | ReadBuffer = calloc(ReadSizes[Itr], 1); |
| 1352 | if (ReadBuffer == NULL) |
| 1353 | { |
| 1354 | Result = ENOMEM; |
| 1355 | goto ErrorExit; |
| 1356 | } |
| 1357 | |
| 1358 | LxtCheckErrno(BytesReadWrite = read(ReadFd, ReadBuffer, ReadSizes[Itr])); |
| 1359 | |
| 1360 | LxtCheckFnResults("read", BytesReadWrite, (ssize_t)ReadSizes[Itr]); |
| 1361 | memcpy(&AccumulatedReadBuffer[Offset], ReadBuffer, ReadSizes[Itr]); |
| 1362 | Offset += ReadSizes[Itr]; |
| 1363 | free(ReadBuffer); |
| 1364 | ReadBuffer = NULL; |
| 1365 | } |
| 1366 | |
| 1367 | // |
| 1368 | // Data read should align up with the previously written data. |
| 1369 | // |
| 1370 | |
| 1371 | if (memcmp(AccumulatedWriteBuffer, AccumulatedReadBuffer, min(TotalWriteSize, TotalReadSize)) != 0) |
| 1372 | { |
| 1373 | |
| 1374 | LxtLogError( |
| 1375 | "Data read from FD:%d does not match what was " |
| 1376 | "written by FD:%d.", |
| 1377 | ReadFd, |
| 1378 | WriteFd); |
| 1379 | |
| 1380 | Result = -1; |
| 1381 | goto ErrorExit; |
| 1382 | } |
| 1383 | |
| 1384 | /* |
| 1385 | LxtLogInfo("Data Written: "); |
| 1386 | DumpBuffer(AccumulatedWriteBuffer, TotalWriteSize); |
| 1387 | LxtLogInfo("Data Read: "); |
| 1388 | DumpBuffer(AccumulatedReadBuffer, TotalReadSize); |
| 1389 | */ |
| 1390 | |
| 1391 | ErrorExit: |
| 1392 | |
| 1393 | if (AccumulatedReadBuffer != NULL) |
| 1394 | { |
| 1395 | free(AccumulatedReadBuffer); |
| 1396 | } |
| 1397 | |
| 1398 | if (AccumulatedWriteBuffer != NULL) |
| 1399 | { |
| 1400 | free(AccumulatedWriteBuffer); |
| 1401 | } |
| 1402 | |
| 1403 | if (ReadBuffer != NULL) |
| 1404 | { |
| 1405 | free(ReadBuffer); |
| 1406 | } |
| 1407 | |
| 1408 | if (WriteBuffer != NULL) |
| 1409 | { |
| 1410 | free(WriteBuffer); |
| 1411 | } |
| 1412 | |
| 1413 | return Result; |
| 1414 | } |