cpython.git - https://github.com/python/cpython.git

diff options

Diffstat (limited to 'Doc/library/imageop.rst')

0 files changed, 0 insertions, 0 deletions

id='n67' href='#n67'>67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940

/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmWin32ProcessExecution.h"

#include "cmSystemTools.h"   

#include <malloc.h>
#include <io.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <windows.h>

#if defined(__BORLANDC__)
#  define STRICMP stricmp
#  define TO_INTPTR(x) ((long)(x))
#endif // Borland
#if defined(_MSC_VER) // Visual studio
#  if ( _MSC_VER >= 1300 )
#    include <stddef.h>
#    define TO_INTPTR(x) ((intptr_t)(x))
#  else // Visual Studio 6
#    define TO_INTPTR(x) ((long)(x))
#  endif // Visual studio .NET
#  define STRICMP _stricmp
#endif // Visual Studio
#if defined(__MINGW32__)
# include <stdint.h>
# define TO_INTPTR(x) ((intptr_t)(x))
# define STRICMP _stricmp
#endif // MinGW

#define POPEN_1 1
#define POPEN_2 2
#define POPEN_3 3
#define POPEN_4 4

#define cmMAX(x,y) (((x)<(y))?(y):(x))

void DisplayErrorMessage()
{
  LPVOID lpMsgBuf;
  FormatMessage( 
    FORMAT_MESSAGE_ALLOCATE_BUFFER | 
    FORMAT_MESSAGE_FROM_SYSTEM | 
    FORMAT_MESSAGE_IGNORE_INSERTS,
    NULL,
    GetLastError(),
    MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
    (LPTSTR) &lpMsgBuf,
    0,
    NULL 
    );
  // Process any inserts in lpMsgBuf.
  // ... 
  // Display the string.
  MessageBox( NULL, (LPCTSTR)lpMsgBuf, "Error", MB_OK | MB_ICONINFORMATION );
  // Free the buffer.
  LocalFree( lpMsgBuf );
}
 
// Code from a Borland web site with the following explaination : 
/* In this article, I will explain how to spawn a console application
 * and redirect its standard input/output using anonymous pipes. An
 * anonymous pipe is a pipe that goes only in one direction (read
 * pipe, write pipe, etc.). Maybe you are asking, "why would I ever
 * need to do this sort of thing?" One example would be a Windows
 * telnet server, where you spawn a shell and listen on a port and
 * send and receive data between the shell and the socket
 * client. (Windows does not really have a built-in remote
 * shell). First, we should talk about pipes. A pipe in Windows is
 * simply a method of communication, often between process. The SDK
 * defines a pipe as "a communication conduit with two ends;
 a process
 * with a handle to one end can communicate with a process having a
 * handle to the other end." In our case, we are using "anonymous"
 * pipes, one-way pipes that "transfer data between a parent process
 * and a child process or between two child processes of the same
 * parent process." It's easiest to imagine a pipe as its namesake. An
 * actual pipe running between processes that can carry data. We are
 * using anonymous pipes because the console app we are spawning is a
 * child process. We use the CreatePipe function which will create an
 * anonymous pipe and return a read handle and a write handle. We will
 * create two pipes, on for stdin and one for stdout. We will then
 * monitor the read end of the stdout pipe to check for display on our
 * child process. Every time there is something availabe for reading,
 * we will display it in our app. Consequently, we check for input in
 * our app and send it off to the write end of the stdin pipe. */ 

inline bool IsWinNT() 
//check if we're running NT 
{
  OSVERSIONINFO osv;
  osv.dwOSVersionInfoSize = sizeof(osv);
  GetVersionEx(&osv);
  return (osv.dwPlatformId == VER_PLATFORM_WIN32_NT); 
}

//--------------------------------------------------------------------------- 
bool cmWin32ProcessExecution::BorlandRunCommand(
  const char* command, const char* dir, 
  std::string& output, int& retVal, bool verbose, int /* timeout */, 
  bool hideWindows) 
{
  //verbose = true;
  //std::cerr << std::endl 
  //        << "WindowsRunCommand(" << command << ")" << std::endl 
  //        << std::flush;
  const int BUFFER_SIZE = 4096;
  char buf[BUFFER_SIZE];
 
//i/o buffer 
  STARTUPINFO si;
  SECURITY_ATTRIBUTES sa;
  SECURITY_DESCRIPTOR sd;
 
//security information for pipes 
  PROCESS_INFORMATION pi;
  HANDLE newstdin,newstdout,read_stdout,write_stdin;
 
//pipe handles 
  if (IsWinNT()) 
//initialize security descriptor (Windows NT) 
    {
    InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
    SetSecurityDescriptorDacl(&sd, true, NULL, false);
    sa.lpSecurityDescriptor = &sd;
 
    }
  else sa.lpSecurityDescriptor = NULL;
  sa.nLength = sizeof(SECURITY_ATTRIBUTES);
  sa.bInheritHandle = true;
 
//allow inheritable handles 
  if (!CreatePipe(&newstdin,&write_stdin,&sa,0)) 
//create stdin pipe 
    {
    return false;
    }
  if (!CreatePipe(&read_stdout,&newstdout,&sa,0)) 
//create stdout pipe 
    {
    CloseHandle(newstdin);
    CloseHandle(write_stdin);
    return false;
 
    }
  GetStartupInfo(&si);
 
//set startupinfo for the spawned process 
  /* The dwFlags member tells CreateProcess how to make the
   * process. STARTF_USESTDHANDLES validates the hStd*
   * members. STARTF_USESHOWWINDOW validates the wShowWindow
   * member. */ 
  
  si.cb = sizeof(STARTUPINFO);
  si.dwFlags = STARTF_USESTDHANDLES|STARTF_USESHOWWINDOW;
  si.hStdOutput = newstdout;
  si.hStdError = newstdout;
  si.wShowWindow = SW_SHOWDEFAULT;
  if(hideWindows)
    {
    si.wShowWindow = SW_HIDE;
    }
 
//set the new handles for the child process si.hStdInput = newstdin;
  char* commandAndArgs = strcpy(new char[strlen(command)+1], command);
  if (!CreateProcess(NULL,commandAndArgs,NULL,NULL,TRUE,
                     0, // CREATE_NEW_CONSOLE, 
                     NULL,dir,&si,&pi)) 
    {
    std::cerr << "CreateProcess failed " << commandAndArgs << std::endl;
    CloseHandle(newstdin);
    CloseHandle(newstdout);
    CloseHandle(read_stdout);
    CloseHandle(write_stdin);
    delete [] commandAndArgs;
    return false;
 
    }
  delete [] commandAndArgs;
  unsigned long exit=0;
 
//process exit code unsigned 
  unsigned long bread;
 
//bytes read unsigned 
  unsigned long avail;
 
//bytes available 
  memset(buf, 0, sizeof(buf));
  for(;;) 
//main program loop 
    {
    Sleep(10);
//check to see if there is any data to read from stdout 
    //std::cout << "Peek for data..." << std::endl;
    PeekNamedPipe(read_stdout,buf,1023,&bread,&avail,NULL);
    if (bread != 0) 
      {
      memset(buf, 0, sizeof(buf));
      if (avail > 1023) 
        {
        while (bread >= 1023) 
          {
          //std::cout << "Read data..." << std::endl;
          ReadFile(read_stdout,buf,1023,&bread,NULL);
 
          //read the stdout pipe 
          memset(buf, 0, sizeof(buf));
          output += buf;
          if (verbose)
            {
            cmSystemTools::Stdout(buf);
            }
          }
        }
      else 
        {
        ReadFile(read_stdout,buf,1023,&bread,NULL);
        output += buf;
        if(verbose) 
          {
          cmSystemTools::Stdout(buf);
          }
 
        }
 
      }
 
    //std::cout << "Check for process..." << std::endl;
    GetExitCodeProcess(pi.hProcess,&exit);
 
//while the process is running 
    if (exit != STILL_ACTIVE) break;
 
    }
  WaitForSingleObject(pi.hProcess, INFINITE);
  GetExitCodeProcess(pi.hProcess,&exit);
  CloseHandle(pi.hThread);
  CloseHandle(pi.hProcess);
  CloseHandle(newstdin);
 
//clean stuff up 
  CloseHandle(newstdout);
  CloseHandle(read_stdout);
  CloseHandle(write_stdin);
  retVal = exit;
  return true;
 
}

bool cmWin32ProcessExecution::StartProcess(
  const char* cmd, const char* path, bool verbose)
{
  this->Initialize();
  this->Verbose = verbose;
  return this->PrivateOpen(cmd, path, _O_RDONLY | _O_TEXT, POPEN_3);
}

bool cmWin32ProcessExecution::Wait(int timeout)
{
  return this->PrivateClose(timeout);
}

/*
 * Internal dictionary mapping popen* file pointers to process handles,
 * for use when retrieving the process exit code.  See _PyPclose() below
 * for more information on this dictionary's use.
 */
static void *_PyPopenProcs = NULL;

static BOOL RealPopenCreateProcess(const char *cmdstring,
                                   const char *path, 
                                   const char *szConsoleSpawn,
                                   HANDLE hStdin,
                                   HANDLE hStdout,
                                   HANDLE hStderr,
                                   HANDLE *hProcess,
                                   bool hideWindows,
                                   std::string& output)
{
  PROCESS_INFORMATION piProcInfo;
  STARTUPINFO siStartInfo;
  char *s1=0,*s2=0;
  const char *s3 = " /c ";
  int i = GetEnvironmentVariable("COMSPEC",NULL,0);
  if (i)
    {
    char *comshell;

    s1 = (char *)malloc(i);
    int x = GetEnvironmentVariable("COMSPEC", s1, i);
    if (!x)
      {
      free(s1);
      return x;
      }

    /* Explicitly check if we are using COMMAND.COM.  If we are
     * then use the w9xpopen hack.
     */
    comshell = s1 + x;
    while (comshell >= s1 && *comshell != '\\')
      --comshell;
    ++comshell;

    if (GetVersion() < 0x80000000 &&
        STRICMP(comshell, "command.com") != 0) 
      {
      /* NT/2000 and not using command.com. */
      x = i + (int)strlen(s3) + (int)strlen(cmdstring) + 1;
      s2 = (char *)malloc(x);
      ZeroMemory(s2, x);
      //sprintf(s2, "%s%s%s", s1, s3, cmdstring);
      sprintf(s2, "%s", cmdstring);
      }
    else 
      {
      /*
       * Oh gag, we're on Win9x or using COMMAND.COM. Use
       * the workaround listed in KB: Q150956
       */
      char modulepath[_MAX_PATH];
      struct stat statinfo;
      GetModuleFileName(NULL, modulepath, sizeof(modulepath));
      for (i = x = 0; modulepath[i]; i++)
        if (modulepath[i] == '\\')
          x = i+1;
      modulepath[x] = '\0';
      /* Create the full-name to w9xpopen, so we can test it exists */
      strncat(modulepath, 
              szConsoleSpawn, 
              (sizeof(modulepath)/sizeof(modulepath[0]))
              -strlen(modulepath));
      if (stat(modulepath, &statinfo) != 0) 
        {
          /* Eeek - file-not-found - possibly an embedding 
             situation - see if we can locate it in sys.prefix 
          */
        strncpy(modulepath, 
                ".", 
                sizeof(modulepath)/sizeof(modulepath[0]));
        if (modulepath[strlen(modulepath)-1] != '\\')
          strcat(modulepath, "\\");
        strncat(modulepath, 
                szConsoleSpawn, 
                (sizeof(modulepath)/sizeof(modulepath[0]))
                -strlen(modulepath));
        /* No where else to look - raise an easily identifiable
           error, rather than leaving Windows to report
           "file not found" - as the user is probably blissfully
           unaware this shim EXE is used, and it will confuse them.
           (well, it confused me for a while ;-)
        */
        if (stat(modulepath, &statinfo) != 0) 
          {
          std::cout 
            << "Can not locate '" << modulepath
            << "' which is needed "
            "for popen to work with your shell "
            "or platform." << std::endl;    
          free(s1);
          free(s2);
          return FALSE;
          }
        }
      x = i + (int)strlen(s3) + (int)strlen(cmdstring) + 1 +
        (int)strlen(modulepath) + 
        (int)strlen(szConsoleSpawn) + 1;
      if(s2)
        {
        free(s2);
        }
      s2 = (char *)malloc(x);
      ZeroMemory(s2, x);
      sprintf(
        s2,
        "%s %s%s%s",
        modulepath,
        s1,
        s3,
        cmdstring);
      sprintf(
        s2,
        "%s %s",
        modulepath,
        cmdstring);
      }
    }

  /* Could be an else here to try cmd.exe / command.com in the path
     Now we'll just error out.. */
  else 
    {
    std::cout << "Cannot locate a COMSPEC environment variable to "
              << "use as the shell" << std::endl; 
    free(s2);
    free(s1);
    return FALSE;
    }
  
  ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
  siStartInfo.cb = sizeof(STARTUPINFO);
  siStartInfo.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
  siStartInfo.hStdInput = hStdin;
  siStartInfo.hStdOutput = hStdout;
  siStartInfo.hStdError = hStderr;
  siStartInfo.wShowWindow = SW_SHOWDEFAULT; 
  if(hideWindows)
    {
    siStartInfo.wShowWindow = SW_HIDE;
    }

  //std::cout << "Create process: " << s2 << std::endl;
  if (CreateProcess(NULL,
                    s2,
                    NULL,
                    NULL,
                    TRUE,
                    0, //CREATE_NEW_CONSOLE,
                    NULL,
                    path,
                    &siStartInfo,
                    &piProcInfo) ) 
    {
    /* Close the handles now so anyone waiting is woken. */
    CloseHandle(piProcInfo.hThread);
    /* Return process handle */
    *hProcess = piProcInfo.hProcess;
    //std::cout << "Process created..." << std::endl;
    free(s2);
    free(s1);
    return TRUE;
    }

  output += "CreateProcessError: ";
  {
  /* Format the error message.  */
  char message[1024];
  DWORD original = GetLastError();
  DWORD length = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM |
                               FORMAT_MESSAGE_IGNORE_INSERTS, 0, original,
                               MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                               message, 1023, 0);
  if(length < 1)
    {
    /* FormatMessage failed.  Use a default message.  */
    _snprintf(message, 1023,
              "Process execution failed with error 0x%X.  "
              "FormatMessage failed with error 0x%X",
              original, GetLastError());
    }
  output += message;
  }
  output += "\n";
  output += "for command: ";
  output += s2;
  if(path)
    {
    output += "\nin dir: ";
    output += path;
    }
  output += "\n";
  free(s2);
  free(s1);
  return FALSE;
}

/* The following code is based off of KB: Q190351 */

bool cmWin32ProcessExecution::PrivateOpen(const char *cmdstring, 
                                          const char* path,
                                          int mode, 
                                          int n)
{
  HANDLE hProcess;

  SECURITY_ATTRIBUTES saAttr;
  BOOL fSuccess;
  int fd1, fd2, fd3;
  this->hChildStdinRd = 0;
  this->hChildStdinWr = 0;
  this->hChildStdoutRd = 0;
  this->hChildStdoutWr = 0;
  this->hChildStderrRd = 0;
  this->hChildStderrWr = 0;
  this->hChildStdinWrDup = 0;
  this->hChildStdoutRdDup = 0;
  this->hChildStderrRdDup = 0;
  
  saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
  saAttr.bInheritHandle = TRUE;
  saAttr.lpSecurityDescriptor = NULL;
  
  fd1 = 0;
  fd2 = 0;
  fd3 = 0;

  if (!CreatePipe(&this->hChildStdinRd, &this->hChildStdinWr, &saAttr, 0))
    {
    this->Output += "CreatePipeError\n";
    return false;
    }
    
  /* Create new output read handle and the input write handle. Set
   * the inheritance properties to FALSE. Otherwise, the child inherits
   * the these handles; resulting in non-closeable handles to the pipes
   * being created. */
  fSuccess = DuplicateHandle(GetCurrentProcess(), this->hChildStdinWr,
                             GetCurrentProcess(), &this->hChildStdinWrDup, 0,
                             FALSE,
                             DUPLICATE_SAME_ACCESS);
  if (!fSuccess)
    {
    this->Output += "DuplicateHandleError\n";
    return false;
    }


  /* Close the inheritable version of ChildStdin
     that we're using. */
  CloseHandle(hChildStdinWr);

  if (!CreatePipe(&this->hChildStdoutRd, &this->hChildStdoutWr, &saAttr, 0))
    {
    this->Output += "CreatePipeError\n";
    return false;
    }

  fSuccess = DuplicateHandle(GetCurrentProcess(), this->hChildStdoutRd,
                             GetCurrentProcess(), &this->hChildStdoutRdDup, 0,
                             FALSE, DUPLICATE_SAME_ACCESS);
  if (!fSuccess)
    {
    this->Output += "DuplicateHandleError\n";
    return false;
    }

  /* Close the inheritable version of ChildStdout
     that we're using. */
  CloseHandle(hChildStdoutRd);

  if (n != POPEN_4) 
    {
    if (!CreatePipe(&this->hChildStderrRd, &this->hChildStderrWr, &saAttr, 0))
      {
      this->Output += "CreatePipeError\n";
      return false;
      }
   fSuccess = DuplicateHandle(GetCurrentProcess(),
                              this->hChildStderrRd,
                              GetCurrentProcess(),
                              &this->hChildStderrRdDup, 0,
                              FALSE, DUPLICATE_SAME_ACCESS);
    if (!fSuccess)
      {
      this->Output += "DuplicateHandleError\n";
      return false;
      }
    /* Close the inheritable version of ChildStdErr that we're using. */
    CloseHandle(hChildStderrRd);

    }
          
  switch (n) 
    {
    case POPEN_1:
      switch (mode & (_O_RDONLY | _O_TEXT | _O_BINARY | _O_WRONLY)) 
        {
        case _O_WRONLY | _O_TEXT:
          /* Case for writing to child Stdin in text mode. */
          fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
          /* We don't care about these pipes anymore,
             so close them. */
          break;

        case _O_RDONLY | _O_TEXT:
          /* Case for reading from child Stdout in text mode. */
          fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
          /* We don't care about these pipes anymore,
             so close them. */
          break;

        case _O_RDONLY | _O_BINARY:
          /* Case for readinig from child Stdout in
             binary mode. */
          fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
          /* We don't care about these pipes anymore,
             so close them. */
          break;

        case _O_WRONLY | _O_BINARY:
          /* Case for writing to child Stdin in binary mode. */
          fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
          /* We don't care about these pipes anymore,
             so close them. */
          break;
        }
      break;
        
    case POPEN_2:
    case POPEN_4: 
      //if ( 1 ) 
        {
        fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
        fd2 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
        break;
        }
        
    case POPEN_3:
      //if ( 1) 
        {
        fd1 = _open_osfhandle(TO_INTPTR(this->hChildStdinWrDup), mode);
        fd2 = _open_osfhandle(TO_INTPTR(this->hChildStdoutRdDup), mode);
        fd3 = _open_osfhandle(TO_INTPTR(this->hChildStderrRdDup), mode);
        break;
        }
    }

  if (n == POPEN_4) 
    {
    if (!RealPopenCreateProcess(cmdstring,
                                path,
                                this->ConsoleSpawn.c_str(),
                                this->hChildStdinRd,
                                this->hChildStdoutWr,
                                this->hChildStdoutWr,
                                &hProcess, this->HideWindows,
                                this->Output))
      {
      if(fd1 >= 0)
        {
        close(fd1);
        }
      if(fd2 >= 0)
        {
        close(fd2);
        }
      if(fd3 >= 0)
        {
        close(fd3);
        }
      return 0;
      }
    }
  else 
    {
    if (!RealPopenCreateProcess(cmdstring,
                                path,
                                this->ConsoleSpawn.c_str(),
                                this->hChildStdinRd,
                                this->hChildStdoutWr,
                                this->hChildStderrWr,
                                &hProcess, this->HideWindows,
                                this->Output))
      {
      if(fd1 >= 0)
        {
        close(fd1);
        }
      if(fd2 >= 0)
        {
        close(fd2);
        }
      if(fd3 >= 0)
        {
        close(fd3);
        }
      return 0;
      }
    }

  /*
   * Insert the files we've created into the process dictionary
   * all referencing the list with the process handle and the
   * initial number of files (see description below in _PyPclose).
   * Since if _PyPclose later tried to wait on a process when all
   * handles weren't closed, it could create a deadlock with the
   * child, we spend some energy here to try to ensure that we
   * either insert all file handles into the dictionary or none
   * at all.  It's a little clumsy with the various popen modes
   * and variable number of files involved.
   */

  /* Child is launched. Close the parents copy of those pipe
   * handles that only the child should have open.  You need to
   * make sure that no handles to the write end of the output pipe
   * are maintained in this process or else the pipe will not close
   * when the child process exits and the ReadFile will hang. */
  this->ProcessHandle = hProcess;
  if ( fd1 >= 0 )
    {
    this->pStdIn = fd1;
    }
  if ( fd2 >= 0 )
    {
    this->pStdOut = fd2;
    }
  if ( fd3 >= 0 )
    {
    this->pStdErr = fd3;
    }

  return true;
}

bool cmWin32ProcessExecution::CloseHandles()
{
  if(this->pStdErr != -1 )
    {
    // this will close this as well: this->hChildStderrRdDup
    _close(this->pStdErr);
    this->pStdErr = -1;
    this->hChildStderrRdDup = 0;
    }
  if(this->pStdIn != -1 )
    {
    // this will close this as well: this->hChildStdinWrDup
    _close(this->pStdIn);
    this->pStdIn = -1;
    this->hChildStdinWrDup = 0;
    }
  if(this->pStdOut != -1 )
    {
    // this will close this as well: this->hChildStdoutRdDup
    _close(this->pStdOut);
    this->pStdOut = -1;
    this->hChildStdoutRdDup = 0;
    }

  bool ret = true;
  if (this->hChildStdinRd && !CloseHandle(this->hChildStdinRd))
    {
    ret = false;
    }
  this->hChildStdinRd = 0;
  // now close these two
  if (this->hChildStdoutWr && !CloseHandle(this->hChildStdoutWr))
    {
    ret = false;
    }
  this->hChildStdoutWr = 0;
  if (this->hChildStderrWr && !CloseHandle(this->hChildStderrWr))
    {
    ret = false;
    }
  this->hChildStderrWr = 0;
  return ret;
}
cmWin32ProcessExecution::~cmWin32ProcessExecution()
{
  this->CloseHandles();
}

/*
 * Wrapper for fclose() to use for popen* files, so we can retrieve the
 * exit code for the child process and return as a result of the close.
 *
 * This function uses the _PyPopenProcs dictionary in order to map the
 * input file pointer to information about the process that was
 * originally created by the popen* call that created the file pointer.
 * The dictionary uses the file pointer as a key (with one entry
 * inserted for each file returned by the original popen* call) and a
 * single list object as the value for all files from a single call.
 * The list object contains the Win32 process handle at [0], and a file
 * count at [1], which is initialized to the total number of file
 * handles using that list.
 *
 * This function closes whichever handle it is passed, and decrements
 * the file count in the dictionary for the process handle pointed to
 * by this file.  On the last close (when the file count reaches zero),
 * this function will wait for the child process and then return its
 * exit code as the result of the close() operation.  This permits the
 * files to be closed in any order - it is always the close() of the
 * final handle that will return the exit code.
 */

 /* RED_FLAG 31-Aug-2000 Tim
  * This is always called (today!) between a pair of
  * Py_BEGIN_ALLOW_THREADS/ Py_END_ALLOW_THREADS
  * macros.  So the thread running this has no valid thread state, as
  * far as Python is concerned.  However, this calls some Python API
  * functions that cannot be called safely without a valid thread
  * state, in particular PyDict_GetItem.
  * As a temporary hack (although it may last for years ...), we
  * *rely* on not having a valid thread state in this function, in
  * order to create our own "from scratch".
  * This will deadlock if _PyPclose is ever called by a thread
  * holding the global lock.
  */

bool cmWin32ProcessExecution::PrivateClose(int /* timeout */)
{
  HANDLE hProcess = this->ProcessHandle;

  int result = -1;
  DWORD exit_code;

  std::string output = "";
  bool done = false;
  while(!done)
    {
    Sleep(10);
    bool have_some = false;
    struct _stat fsout;
    struct _stat fserr;
    int rout = _fstat(this->pStdOut, &fsout);
    int rerr = _fstat(this->pStdErr, &fserr);
    if ( rout && rerr )
      {
      break;
      }
    if (fserr.st_size > 0)
      {
      char buffer[1024];
      int len = read(this->pStdErr, buffer, 1023);
      buffer[len] = 0;
      if ( this->Verbose )
        {
        cmSystemTools::Stdout(buffer);
        }
      output += buffer;
      have_some = true;
      }
    if (fsout.st_size > 0)
      {
      char buffer[1024];
      int len = read(this->pStdOut, buffer, 1023);
      buffer[len] = 0;
      if ( this->Verbose )
        {
        cmSystemTools::Stdout(buffer);
        }
      output += buffer;
      have_some = true;
      }
    unsigned long exitCode;
    if ( ! have_some )
      {
      GetExitCodeProcess(hProcess,&exitCode);
      if (exitCode != STILL_ACTIVE)
        {
        break;
        }
      }
    }  

  
  if (WaitForSingleObject(hProcess, INFINITE) != WAIT_FAILED &&
      GetExitCodeProcess(hProcess, &exit_code)) 
    {
    result = exit_code;
    } 
  else 
    {
    /* Indicate failure - this will cause the file object
     * to raise an I/O error and translate the last Win32
     * error code from errno.  We do have a problem with
     * last errors that overlap the normal errno table,
     * but that's a consistent problem with the file object.
     */
    if (result != EOF) 
      {
      /* If the error wasn't from the fclose(), then
       * set errno for the file object error handling.
       */
      errno = GetLastError();
      }
    result = -1;
    }

  /* Free up the native handle at this point */
  CloseHandle(hProcess);
  this->ExitValue = result;
  this->Output += output;
  bool ret = this->CloseHandles();
  if ( result < 0 || !ret)
    {
    return false;
    }
  return true;
}

int cmWin32ProcessExecution::Windows9xHack(const char* command)
{
  BOOL bRet;
  STARTUPINFO si;
  PROCESS_INFORMATION pi;
  DWORD exit_code=0;

  if (!command) 
    {
    cmSystemTools::Error("Windows9xHack: Command not specified");
    return 1;
  }

  /* Make child process use this app's standard files. */
  ZeroMemory(&si, sizeof si);
  si.cb = sizeof si;
  si.dwFlags = STARTF_USESTDHANDLES;
  si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
  si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
  si.hStdError = GetStdHandle(STD_ERROR_HANDLE);

  
  char * app = 0;
  char* cmd = new char[ strlen(command) + 1 ];
  strcpy(cmd, command);

  bRet = CreateProcess(
    app, cmd,
    0, 0,
    TRUE, 0,
    0, 0,
    &si, &pi
    );
  delete [] cmd;

  if (bRet) 
    {
    if (WaitForSingleObject(pi.hProcess, INFINITE) != WAIT_FAILED) 
      {
      GetExitCodeProcess(pi.hProcess, &exit_code);
      }
    CloseHandle(pi.hProcess);
    CloseHandle(pi.hThread);
    return exit_code;
    }

  return 1;
}


context:
space:
mode: