| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/msw/utilsexc.cpp |
| 3 | // Purpose: wxExecute implementation for MSW |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 04/01/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) 1998-2002 wxWidgets dev team |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | // For compilers that support precompilation, includes "wx.h". |
| 21 | #include "wx/wxprec.h" |
| 22 | |
| 23 | #ifdef __BORLANDC__ |
| 24 | #pragma hdrstop |
| 25 | #endif |
| 26 | |
| 27 | #ifndef WX_PRECOMP |
| 28 | #include "wx/utils.h" |
| 29 | #include "wx/app.h" |
| 30 | #include "wx/intl.h" |
| 31 | #include "wx/log.h" |
| 32 | #if wxUSE_STREAMS |
| 33 | #include "wx/stream.h" |
| 34 | #endif |
| 35 | #include "wx/module.h" |
| 36 | #endif |
| 37 | |
| 38 | #include "wx/process.h" |
| 39 | #include "wx/thread.h" |
| 40 | #include "wx/apptrait.h" |
| 41 | #include "wx/vector.h" |
| 42 | |
| 43 | |
| 44 | #include "wx/msw/private.h" |
| 45 | |
| 46 | #include <ctype.h> |
| 47 | |
| 48 | #if !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) |
| 49 | #include <direct.h> |
| 50 | #ifndef __MWERKS__ |
| 51 | #include <dos.h> |
| 52 | #endif |
| 53 | #endif |
| 54 | |
| 55 | #if defined(__GNUWIN32__) |
| 56 | #include <sys/unistd.h> |
| 57 | #include <sys/stat.h> |
| 58 | #endif |
| 59 | |
| 60 | #if !defined(__WXMICROWIN__) && !defined(__WXWINCE__) |
| 61 | #ifndef __UNIX__ |
| 62 | #include <io.h> |
| 63 | #endif |
| 64 | |
| 65 | #ifndef __GNUWIN32__ |
| 66 | #include <shellapi.h> |
| 67 | #endif |
| 68 | #endif |
| 69 | |
| 70 | #include <stdio.h> |
| 71 | #include <stdlib.h> |
| 72 | #include <string.h> |
| 73 | #ifndef __WATCOMC__ |
| 74 | #if !(defined(_MSC_VER) && (_MSC_VER > 800)) |
| 75 | #include <errno.h> |
| 76 | #endif |
| 77 | #endif |
| 78 | #include <stdarg.h> |
| 79 | |
| 80 | #if wxUSE_IPC |
| 81 | #include "wx/dde.h" // for WX_DDE hack in wxExecute |
| 82 | #endif // wxUSE_IPC |
| 83 | |
| 84 | // implemented in utils.cpp |
| 85 | extern "C" WXDLLIMPEXP_BASE HWND |
| 86 | wxCreateHiddenWindow(LPCTSTR *pclassname, LPCTSTR classname, WNDPROC wndproc); |
| 87 | |
| 88 | // ---------------------------------------------------------------------------- |
| 89 | // constants |
| 90 | // ---------------------------------------------------------------------------- |
| 91 | |
| 92 | // this message is sent when the process we're waiting for terminates |
| 93 | #define wxWM_PROC_TERMINATED (WM_USER + 10000) |
| 94 | |
| 95 | // ---------------------------------------------------------------------------- |
| 96 | // this module globals |
| 97 | // ---------------------------------------------------------------------------- |
| 98 | |
| 99 | // we need to create a hidden window to receive the process termination |
| 100 | // notifications and for this we need a (Win) class name for it which we will |
| 101 | // register the first time it's needed |
| 102 | static const wxChar *wxMSWEXEC_WNDCLASSNAME = wxT("_wxExecute_Internal_Class"); |
| 103 | static const wxChar *gs_classForHiddenWindow = NULL; |
| 104 | |
| 105 | // event used to wake up threads waiting in wxExecuteThread |
| 106 | static HANDLE gs_heventShutdown = NULL; |
| 107 | |
| 108 | // handles of all threads monitoring the execution of asynchronously running |
| 109 | // processes |
| 110 | static wxVector<HANDLE> gs_asyncThreads; |
| 111 | |
| 112 | // ---------------------------------------------------------------------------- |
| 113 | // private types |
| 114 | // ---------------------------------------------------------------------------- |
| 115 | |
| 116 | // structure describing the process we're being waiting for |
| 117 | struct wxExecuteData |
| 118 | { |
| 119 | public: |
| 120 | ~wxExecuteData() |
| 121 | { |
| 122 | if ( !::CloseHandle(hProcess) ) |
| 123 | { |
| 124 | wxLogLastError(wxT("CloseHandle(hProcess)")); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | HWND hWnd; // window to send wxWM_PROC_TERMINATED to |
| 129 | HANDLE hProcess; // handle of the process |
| 130 | DWORD dwProcessId; // pid of the process |
| 131 | wxProcess *handler; |
| 132 | DWORD dwExitCode; // the exit code of the process |
| 133 | bool state; // set to false when the process finishes |
| 134 | }; |
| 135 | |
| 136 | class wxExecuteModule : public wxModule |
| 137 | { |
| 138 | public: |
| 139 | virtual bool OnInit() { return true; } |
| 140 | virtual void OnExit() |
| 141 | { |
| 142 | if ( gs_heventShutdown ) |
| 143 | { |
| 144 | // stop any threads waiting for the termination of asynchronously |
| 145 | // running processes |
| 146 | if ( !::SetEvent(gs_heventShutdown) ) |
| 147 | { |
| 148 | wxLogDebug(_T("Failed to set shutdown event in wxExecuteModule")); |
| 149 | } |
| 150 | |
| 151 | ::CloseHandle(gs_heventShutdown); |
| 152 | gs_heventShutdown = NULL; |
| 153 | |
| 154 | // now wait until they terminate |
| 155 | if ( !gs_asyncThreads.empty() ) |
| 156 | { |
| 157 | const size_t numThreads = gs_asyncThreads.size(); |
| 158 | |
| 159 | if ( ::WaitForMultipleObjects |
| 160 | ( |
| 161 | numThreads, |
| 162 | &gs_asyncThreads[0], |
| 163 | TRUE, // wait for all of them to become signalled |
| 164 | 3000 // long but finite value |
| 165 | ) == WAIT_TIMEOUT ) |
| 166 | { |
| 167 | wxLogDebug(_T("Failed to stop all wxExecute monitor threads")); |
| 168 | } |
| 169 | |
| 170 | for ( size_t n = 0; n < numThreads; n++ ) |
| 171 | { |
| 172 | ::CloseHandle(gs_asyncThreads[n]); |
| 173 | } |
| 174 | |
| 175 | gs_asyncThreads.clear(); |
| 176 | } |
| 177 | } |
| 178 | |
| 179 | if ( gs_classForHiddenWindow ) |
| 180 | { |
| 181 | if ( !::UnregisterClass(wxMSWEXEC_WNDCLASSNAME, wxGetInstance()) ) |
| 182 | { |
| 183 | wxLogLastError(_T("UnregisterClass(wxExecClass)")); |
| 184 | } |
| 185 | |
| 186 | gs_classForHiddenWindow = NULL; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | private: |
| 191 | DECLARE_DYNAMIC_CLASS(wxExecuteModule) |
| 192 | }; |
| 193 | |
| 194 | IMPLEMENT_DYNAMIC_CLASS(wxExecuteModule, wxModule) |
| 195 | |
| 196 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 197 | |
| 198 | // ---------------------------------------------------------------------------- |
| 199 | // wxPipeStreams |
| 200 | // ---------------------------------------------------------------------------- |
| 201 | |
| 202 | class wxPipeInputStream: public wxInputStream |
| 203 | { |
| 204 | public: |
| 205 | wxPipeInputStream(HANDLE hInput); |
| 206 | virtual ~wxPipeInputStream(); |
| 207 | |
| 208 | // returns true if the pipe is still opened |
| 209 | bool IsOpened() const { return m_hInput != INVALID_HANDLE_VALUE; } |
| 210 | |
| 211 | // returns true if there is any data to be read from the pipe |
| 212 | virtual bool CanRead() const; |
| 213 | |
| 214 | protected: |
| 215 | size_t OnSysRead(void *buffer, size_t len); |
| 216 | |
| 217 | protected: |
| 218 | HANDLE m_hInput; |
| 219 | |
| 220 | wxDECLARE_NO_COPY_CLASS(wxPipeInputStream); |
| 221 | }; |
| 222 | |
| 223 | class wxPipeOutputStream: public wxOutputStream |
| 224 | { |
| 225 | public: |
| 226 | wxPipeOutputStream(HANDLE hOutput); |
| 227 | virtual ~wxPipeOutputStream() { Close(); } |
| 228 | bool Close(); |
| 229 | |
| 230 | protected: |
| 231 | size_t OnSysWrite(const void *buffer, size_t len); |
| 232 | |
| 233 | protected: |
| 234 | HANDLE m_hOutput; |
| 235 | |
| 236 | wxDECLARE_NO_COPY_CLASS(wxPipeOutputStream); |
| 237 | }; |
| 238 | |
| 239 | // define this to let wxexec.cpp know that we know what we're doing |
| 240 | #define _WX_USED_BY_WXEXECUTE_ |
| 241 | #include "../common/execcmn.cpp" |
| 242 | |
| 243 | // ---------------------------------------------------------------------------- |
| 244 | // wxPipe represents a Win32 anonymous pipe |
| 245 | // ---------------------------------------------------------------------------- |
| 246 | |
| 247 | class wxPipe |
| 248 | { |
| 249 | public: |
| 250 | // the symbolic names for the pipe ends |
| 251 | enum Direction |
| 252 | { |
| 253 | Read, |
| 254 | Write |
| 255 | }; |
| 256 | |
| 257 | // default ctor doesn't do anything |
| 258 | wxPipe() { m_handles[Read] = m_handles[Write] = INVALID_HANDLE_VALUE; } |
| 259 | |
| 260 | // create the pipe, return true if ok, false on error |
| 261 | bool Create() |
| 262 | { |
| 263 | // default secutiry attributes |
| 264 | SECURITY_ATTRIBUTES security; |
| 265 | |
| 266 | security.nLength = sizeof(security); |
| 267 | security.lpSecurityDescriptor = NULL; |
| 268 | security.bInheritHandle = TRUE; // to pass it to the child |
| 269 | |
| 270 | if ( !::CreatePipe(&m_handles[0], &m_handles[1], &security, 0) ) |
| 271 | { |
| 272 | wxLogSysError(_("Failed to create an anonymous pipe")); |
| 273 | |
| 274 | return false; |
| 275 | } |
| 276 | |
| 277 | return true; |
| 278 | } |
| 279 | |
| 280 | // return true if we were created successfully |
| 281 | bool IsOk() const { return m_handles[Read] != INVALID_HANDLE_VALUE; } |
| 282 | |
| 283 | // return the descriptor for one of the pipe ends |
| 284 | HANDLE operator[](Direction which) const { return m_handles[which]; } |
| 285 | |
| 286 | // detach a descriptor, meaning that the pipe dtor won't close it, and |
| 287 | // return it |
| 288 | HANDLE Detach(Direction which) |
| 289 | { |
| 290 | HANDLE handle = m_handles[which]; |
| 291 | m_handles[which] = INVALID_HANDLE_VALUE; |
| 292 | |
| 293 | return handle; |
| 294 | } |
| 295 | |
| 296 | // close the pipe descriptors |
| 297 | void Close() |
| 298 | { |
| 299 | for ( size_t n = 0; n < WXSIZEOF(m_handles); n++ ) |
| 300 | { |
| 301 | if ( m_handles[n] != INVALID_HANDLE_VALUE ) |
| 302 | { |
| 303 | ::CloseHandle(m_handles[n]); |
| 304 | m_handles[n] = INVALID_HANDLE_VALUE; |
| 305 | } |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | // dtor closes the pipe descriptors |
| 310 | ~wxPipe() { Close(); } |
| 311 | |
| 312 | private: |
| 313 | HANDLE m_handles[2]; |
| 314 | }; |
| 315 | |
| 316 | #endif // wxUSE_STREAMS |
| 317 | |
| 318 | // ============================================================================ |
| 319 | // implementation |
| 320 | // ============================================================================ |
| 321 | |
| 322 | // ---------------------------------------------------------------------------- |
| 323 | // process termination detecting support |
| 324 | // ---------------------------------------------------------------------------- |
| 325 | |
| 326 | // thread function for the thread monitoring the process termination |
| 327 | static DWORD __stdcall wxExecuteThread(void *arg) |
| 328 | { |
| 329 | wxExecuteData * const data = (wxExecuteData *)arg; |
| 330 | |
| 331 | // create the shutdown event if we're the first thread starting to wait |
| 332 | if ( !gs_heventShutdown ) |
| 333 | { |
| 334 | // create a manual initially non-signalled event object |
| 335 | gs_heventShutdown = ::CreateEvent(NULL, TRUE, FALSE, NULL); |
| 336 | if ( !gs_heventShutdown ) |
| 337 | { |
| 338 | wxLogDebug(_T("CreateEvent() in wxExecuteThread failed")); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | HANDLE handles[2] = { data->hProcess, gs_heventShutdown }; |
| 343 | switch ( ::WaitForMultipleObjects(2, handles, FALSE, INFINITE) ) |
| 344 | { |
| 345 | case WAIT_OBJECT_0: |
| 346 | // process terminated, get its exit code |
| 347 | if ( !::GetExitCodeProcess(data->hProcess, &data->dwExitCode) ) |
| 348 | { |
| 349 | wxLogLastError(wxT("GetExitCodeProcess")); |
| 350 | } |
| 351 | |
| 352 | wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE, |
| 353 | wxT("process should have terminated") ); |
| 354 | |
| 355 | // send a message indicating process termination to the window |
| 356 | ::SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data); |
| 357 | break; |
| 358 | |
| 359 | case WAIT_OBJECT_0 + 1: |
| 360 | // we're shutting down but the process is still running -- leave it |
| 361 | // run but clean up the associated data |
| 362 | if ( !data->state ) |
| 363 | { |
| 364 | delete data; |
| 365 | } |
| 366 | //else: exiting while synchronously executing process is still |
| 367 | // running? this shouldn't happen... |
| 368 | break; |
| 369 | |
| 370 | default: |
| 371 | wxLogDebug(_T("Waiting for the process termination failed!")); |
| 372 | } |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | // window procedure of a hidden window which is created just to receive |
| 378 | // the notification message when a process exits |
| 379 | LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, |
| 380 | WPARAM wParam, LPARAM lParam) |
| 381 | { |
| 382 | if ( message == wxWM_PROC_TERMINATED ) |
| 383 | { |
| 384 | DestroyWindow(hWnd); // we don't need it any more |
| 385 | |
| 386 | wxExecuteData * const data = (wxExecuteData *)lParam; |
| 387 | if ( data->handler ) |
| 388 | { |
| 389 | data->handler->OnTerminate((int)data->dwProcessId, |
| 390 | (int)data->dwExitCode); |
| 391 | } |
| 392 | |
| 393 | if ( data->state ) |
| 394 | { |
| 395 | // we're executing synchronously, tell the waiting thread |
| 396 | // that the process finished |
| 397 | data->state = false; |
| 398 | } |
| 399 | else |
| 400 | { |
| 401 | // asynchronous execution - we should do the clean up |
| 402 | delete data; |
| 403 | } |
| 404 | |
| 405 | return 0; |
| 406 | } |
| 407 | else |
| 408 | { |
| 409 | return ::DefWindowProc(hWnd, message, wParam, lParam); |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | // ============================================================================ |
| 414 | // implementation of IO redirection support classes |
| 415 | // ============================================================================ |
| 416 | |
| 417 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 418 | |
| 419 | // ---------------------------------------------------------------------------- |
| 420 | // wxPipeInputStreams |
| 421 | // ---------------------------------------------------------------------------- |
| 422 | |
| 423 | wxPipeInputStream::wxPipeInputStream(HANDLE hInput) |
| 424 | { |
| 425 | m_hInput = hInput; |
| 426 | } |
| 427 | |
| 428 | wxPipeInputStream::~wxPipeInputStream() |
| 429 | { |
| 430 | if ( m_hInput != INVALID_HANDLE_VALUE ) |
| 431 | ::CloseHandle(m_hInput); |
| 432 | } |
| 433 | |
| 434 | bool wxPipeInputStream::CanRead() const |
| 435 | { |
| 436 | // we can read if there's something in the put back buffer |
| 437 | // even pipe is closed |
| 438 | if ( m_wbacksize > m_wbackcur ) |
| 439 | return true; |
| 440 | |
| 441 | wxPipeInputStream * const self = wxConstCast(this, wxPipeInputStream); |
| 442 | |
| 443 | if ( !IsOpened() ) |
| 444 | { |
| 445 | // set back to mark Eof as it may have been unset by Ungetch() |
| 446 | self->m_lasterror = wxSTREAM_EOF; |
| 447 | return false; |
| 448 | } |
| 449 | |
| 450 | DWORD nAvailable; |
| 451 | |
| 452 | // function name is misleading, it works with anon pipes as well |
| 453 | DWORD rc = ::PeekNamedPipe |
| 454 | ( |
| 455 | m_hInput, // handle |
| 456 | NULL, 0, // ptr to buffer and its size |
| 457 | NULL, // [out] bytes read |
| 458 | &nAvailable, // [out] bytes available |
| 459 | NULL // [out] bytes left |
| 460 | ); |
| 461 | |
| 462 | if ( !rc ) |
| 463 | { |
| 464 | if ( ::GetLastError() != ERROR_BROKEN_PIPE ) |
| 465 | { |
| 466 | // unexpected error |
| 467 | wxLogLastError(_T("PeekNamedPipe")); |
| 468 | } |
| 469 | |
| 470 | // don't try to continue reading from a pipe if an error occurred or if |
| 471 | // it had been closed |
| 472 | ::CloseHandle(m_hInput); |
| 473 | |
| 474 | self->m_hInput = INVALID_HANDLE_VALUE; |
| 475 | self->m_lasterror = wxSTREAM_EOF; |
| 476 | |
| 477 | nAvailable = 0; |
| 478 | } |
| 479 | |
| 480 | return nAvailable != 0; |
| 481 | } |
| 482 | |
| 483 | size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) |
| 484 | { |
| 485 | if ( !IsOpened() ) |
| 486 | { |
| 487 | m_lasterror = wxSTREAM_EOF; |
| 488 | |
| 489 | return 0; |
| 490 | } |
| 491 | |
| 492 | DWORD bytesRead; |
| 493 | if ( !::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) |
| 494 | { |
| 495 | m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE |
| 496 | ? wxSTREAM_EOF |
| 497 | : wxSTREAM_READ_ERROR; |
| 498 | } |
| 499 | |
| 500 | // bytesRead is set to 0, as desired, if an error occurred |
| 501 | return bytesRead; |
| 502 | } |
| 503 | |
| 504 | // ---------------------------------------------------------------------------- |
| 505 | // wxPipeOutputStream |
| 506 | // ---------------------------------------------------------------------------- |
| 507 | |
| 508 | wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput) |
| 509 | { |
| 510 | m_hOutput = hOutput; |
| 511 | |
| 512 | // unblock the pipe to prevent deadlocks when we're writing to the pipe |
| 513 | // from which the child process can't read because it is writing in its own |
| 514 | // end of it |
| 515 | DWORD mode = PIPE_READMODE_BYTE | PIPE_NOWAIT; |
| 516 | if ( !::SetNamedPipeHandleState |
| 517 | ( |
| 518 | m_hOutput, |
| 519 | &mode, |
| 520 | NULL, // collection count (we don't set it) |
| 521 | NULL // timeout (we don't set it neither) |
| 522 | ) ) |
| 523 | { |
| 524 | wxLogLastError(_T("SetNamedPipeHandleState(PIPE_NOWAIT)")); |
| 525 | } |
| 526 | } |
| 527 | |
| 528 | bool wxPipeOutputStream::Close() |
| 529 | { |
| 530 | return ::CloseHandle(m_hOutput) != 0; |
| 531 | } |
| 532 | |
| 533 | |
| 534 | size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len) |
| 535 | { |
| 536 | m_lasterror = wxSTREAM_NO_ERROR; |
| 537 | |
| 538 | DWORD totalWritten = 0; |
| 539 | while ( len > 0 ) |
| 540 | { |
| 541 | DWORD chunkWritten; |
| 542 | if ( !::WriteFile(m_hOutput, buffer, len, &chunkWritten, NULL) ) |
| 543 | { |
| 544 | m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE |
| 545 | ? wxSTREAM_EOF |
| 546 | : wxSTREAM_WRITE_ERROR; |
| 547 | break; |
| 548 | } |
| 549 | |
| 550 | if ( !chunkWritten ) |
| 551 | break; |
| 552 | |
| 553 | buffer = (char *)buffer + chunkWritten; |
| 554 | totalWritten += chunkWritten; |
| 555 | len -= chunkWritten; |
| 556 | } |
| 557 | |
| 558 | return totalWritten; |
| 559 | } |
| 560 | |
| 561 | #endif // wxUSE_STREAMS |
| 562 | |
| 563 | // ============================================================================ |
| 564 | // wxExecute functions family |
| 565 | // ============================================================================ |
| 566 | |
| 567 | #if wxUSE_IPC |
| 568 | |
| 569 | // connect to the given server via DDE and ask it to execute the command |
| 570 | bool |
| 571 | wxExecuteDDE(const wxString& ddeServer, |
| 572 | const wxString& ddeTopic, |
| 573 | const wxString& ddeCommand) |
| 574 | { |
| 575 | bool ok wxDUMMY_INITIALIZE(false); |
| 576 | |
| 577 | wxDDEClient client; |
| 578 | wxConnectionBase * |
| 579 | conn = client.MakeConnection(wxEmptyString, ddeServer, ddeTopic); |
| 580 | if ( !conn ) |
| 581 | { |
| 582 | ok = false; |
| 583 | } |
| 584 | else // connected to DDE server |
| 585 | { |
| 586 | // the added complication here is that although most programs use |
| 587 | // XTYP_EXECUTE for their DDE API, some important ones -- like Word |
| 588 | // and other MS stuff - use XTYP_REQUEST! |
| 589 | // |
| 590 | // moreover, anotheri mportant program (IE) understands both but |
| 591 | // returns an error from Execute() so we must try Request() first |
| 592 | // to avoid doing it twice |
| 593 | { |
| 594 | // we're prepared for this one to fail, so don't show errors |
| 595 | wxLogNull noErrors; |
| 596 | |
| 597 | ok = conn->Request(ddeCommand) != NULL; |
| 598 | } |
| 599 | |
| 600 | if ( !ok ) |
| 601 | { |
| 602 | // now try execute -- but show the errors |
| 603 | ok = conn->Execute(ddeCommand); |
| 604 | } |
| 605 | } |
| 606 | |
| 607 | return ok; |
| 608 | } |
| 609 | |
| 610 | #endif // wxUSE_IPC |
| 611 | |
| 612 | long wxExecute(const wxString& cmd, int flags, wxProcess *handler) |
| 613 | { |
| 614 | wxCHECK_MSG( !cmd.empty(), 0, wxT("empty command in wxExecute") ); |
| 615 | |
| 616 | #if wxUSE_THREADS |
| 617 | // for many reasons, the code below breaks down if it's called from another |
| 618 | // thread -- this could be fixed, but as Unix versions don't support this |
| 619 | // neither I don't want to waste time on this now |
| 620 | wxASSERT_MSG( wxThread::IsMain(), |
| 621 | _T("wxExecute() can be called only from the main thread") ); |
| 622 | #endif // wxUSE_THREADS |
| 623 | |
| 624 | wxString command; |
| 625 | |
| 626 | #if wxUSE_IPC |
| 627 | // DDE hack: this is really not pretty, but we need to allow this for |
| 628 | // transparent handling of DDE servers in wxMimeTypesManager. Usually it |
| 629 | // returns the command which should be run to view/open/... a file of the |
| 630 | // given type. Sometimes, however, this command just launches the server |
| 631 | // and an additional DDE request must be made to really open the file. To |
| 632 | // keep all this well hidden from the application, we allow a special form |
| 633 | // of command: WX_DDE#<command>#DDE_SERVER#DDE_TOPIC#DDE_COMMAND in which |
| 634 | // case we execute just <command> and process the rest below |
| 635 | wxString ddeServer, ddeTopic, ddeCommand; |
| 636 | static const size_t lenDdePrefix = 7; // strlen("WX_DDE:") |
| 637 | if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") ) |
| 638 | { |
| 639 | // speed up the concatenations below |
| 640 | ddeServer.reserve(256); |
| 641 | ddeTopic.reserve(256); |
| 642 | ddeCommand.reserve(256); |
| 643 | |
| 644 | const wxChar *p = cmd.c_str() + 7; |
| 645 | while ( *p && *p != _T('#') ) |
| 646 | { |
| 647 | command += *p++; |
| 648 | } |
| 649 | |
| 650 | if ( *p ) |
| 651 | { |
| 652 | // skip '#' |
| 653 | p++; |
| 654 | } |
| 655 | else |
| 656 | { |
| 657 | wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); |
| 658 | } |
| 659 | |
| 660 | while ( *p && *p != _T('#') ) |
| 661 | { |
| 662 | ddeServer += *p++; |
| 663 | } |
| 664 | |
| 665 | if ( *p ) |
| 666 | { |
| 667 | // skip '#' |
| 668 | p++; |
| 669 | } |
| 670 | else |
| 671 | { |
| 672 | wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); |
| 673 | } |
| 674 | |
| 675 | while ( *p && *p != _T('#') ) |
| 676 | { |
| 677 | ddeTopic += *p++; |
| 678 | } |
| 679 | |
| 680 | if ( *p ) |
| 681 | { |
| 682 | // skip '#' |
| 683 | p++; |
| 684 | } |
| 685 | else |
| 686 | { |
| 687 | wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); |
| 688 | } |
| 689 | |
| 690 | while ( *p ) |
| 691 | { |
| 692 | ddeCommand += *p++; |
| 693 | } |
| 694 | |
| 695 | // if we want to just launch the program and not wait for its |
| 696 | // termination, try to execute DDE command right now, it can succeed if |
| 697 | // the process is already running - but as it fails if it's not |
| 698 | // running, suppress any errors it might generate |
| 699 | if ( !(flags & wxEXEC_SYNC) ) |
| 700 | { |
| 701 | wxLogNull noErrors; |
| 702 | if ( wxExecuteDDE(ddeServer, ddeTopic, ddeCommand) ) |
| 703 | { |
| 704 | // a dummy PID - this is a hack, of course, but it's well worth |
| 705 | // it as we don't open a new server each time we're called |
| 706 | // which would be quite bad |
| 707 | return -1; |
| 708 | } |
| 709 | } |
| 710 | } |
| 711 | else |
| 712 | #endif // wxUSE_IPC |
| 713 | { |
| 714 | // no DDE |
| 715 | command = cmd; |
| 716 | } |
| 717 | |
| 718 | // the IO redirection is only supported with wxUSE_STREAMS |
| 719 | BOOL redirect = FALSE; |
| 720 | |
| 721 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 722 | wxPipe pipeIn, pipeOut, pipeErr; |
| 723 | |
| 724 | // we'll save here the copy of pipeIn[Write] |
| 725 | HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE; |
| 726 | |
| 727 | // open the pipes to which child process IO will be redirected if needed |
| 728 | if ( handler && handler->IsRedirected() ) |
| 729 | { |
| 730 | // create pipes for redirecting stdin, stdout and stderr |
| 731 | if ( !pipeIn.Create() || !pipeOut.Create() || !pipeErr.Create() ) |
| 732 | { |
| 733 | wxLogSysError(_("Failed to redirect the child process IO")); |
| 734 | |
| 735 | // indicate failure: we need to return different error code |
| 736 | // depending on the sync flag |
| 737 | return flags & wxEXEC_SYNC ? -1 : 0; |
| 738 | } |
| 739 | |
| 740 | redirect = TRUE; |
| 741 | } |
| 742 | #endif // wxUSE_STREAMS |
| 743 | |
| 744 | // create the process |
| 745 | STARTUPINFO si; |
| 746 | wxZeroMemory(si); |
| 747 | si.cb = sizeof(si); |
| 748 | |
| 749 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 750 | if ( redirect ) |
| 751 | { |
| 752 | si.dwFlags = STARTF_USESTDHANDLES; |
| 753 | |
| 754 | si.hStdInput = pipeIn[wxPipe::Read]; |
| 755 | si.hStdOutput = pipeOut[wxPipe::Write]; |
| 756 | si.hStdError = pipeErr[wxPipe::Write]; |
| 757 | |
| 758 | // when the std IO is redirected, we don't show the (console) process |
| 759 | // window by default, but this can be overridden by the caller by |
| 760 | // specifying wxEXEC_NOHIDE flag |
| 761 | if ( !(flags & wxEXEC_NOHIDE) ) |
| 762 | { |
| 763 | si.dwFlags |= STARTF_USESHOWWINDOW; |
| 764 | si.wShowWindow = SW_HIDE; |
| 765 | } |
| 766 | |
| 767 | // we must duplicate the handle to the write side of stdin pipe to make |
| 768 | // it non inheritable: indeed, we must close the writing end of pipeIn |
| 769 | // before launching the child process as otherwise this handle will be |
| 770 | // inherited by the child which will never close it and so the pipe |
| 771 | // will never be closed and the child will be left stuck in ReadFile() |
| 772 | HANDLE pipeInWrite = pipeIn.Detach(wxPipe::Write); |
| 773 | if ( !::DuplicateHandle |
| 774 | ( |
| 775 | ::GetCurrentProcess(), |
| 776 | pipeInWrite, |
| 777 | ::GetCurrentProcess(), |
| 778 | &hpipeStdinWrite, |
| 779 | 0, // desired access: unused here |
| 780 | FALSE, // not inherited |
| 781 | DUPLICATE_SAME_ACCESS // same access as for src handle |
| 782 | ) ) |
| 783 | { |
| 784 | wxLogLastError(_T("DuplicateHandle")); |
| 785 | } |
| 786 | |
| 787 | ::CloseHandle(pipeInWrite); |
| 788 | } |
| 789 | #endif // wxUSE_STREAMS |
| 790 | |
| 791 | PROCESS_INFORMATION pi; |
| 792 | DWORD dwFlags = CREATE_SUSPENDED; |
| 793 | |
| 794 | #ifndef __WXWINCE__ |
| 795 | dwFlags |= CREATE_DEFAULT_ERROR_MODE ; |
| 796 | #else |
| 797 | // we are assuming commands without spaces for now |
| 798 | wxString moduleName = command.BeforeFirst(wxT(' ')); |
| 799 | wxString arguments = command.AfterFirst(wxT(' ')); |
| 800 | #endif |
| 801 | |
| 802 | bool ok = ::CreateProcess |
| 803 | ( |
| 804 | // WinCE requires appname to be non null |
| 805 | // Win32 allows for null |
| 806 | #ifdef __WXWINCE__ |
| 807 | (wxChar *) |
| 808 | moduleName.wx_str(),// application name |
| 809 | (wxChar *) |
| 810 | arguments.wx_str(), // arguments |
| 811 | #else |
| 812 | NULL, // application name (use only cmd line) |
| 813 | (wxChar *) |
| 814 | command.wx_str(), // full command line |
| 815 | #endif |
| 816 | NULL, // security attributes: defaults for both |
| 817 | NULL, // the process and its main thread |
| 818 | redirect, // inherit handles if we use pipes |
| 819 | dwFlags, // process creation flags |
| 820 | NULL, // environment (use the same) |
| 821 | NULL, // current directory (use the same) |
| 822 | &si, // startup info (unused here) |
| 823 | &pi // process info |
| 824 | ) != 0; |
| 825 | |
| 826 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 827 | // we can close the pipe ends used by child anyhow |
| 828 | if ( redirect ) |
| 829 | { |
| 830 | ::CloseHandle(pipeIn.Detach(wxPipe::Read)); |
| 831 | ::CloseHandle(pipeOut.Detach(wxPipe::Write)); |
| 832 | ::CloseHandle(pipeErr.Detach(wxPipe::Write)); |
| 833 | } |
| 834 | #endif // wxUSE_STREAMS |
| 835 | |
| 836 | if ( !ok ) |
| 837 | { |
| 838 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 839 | // close the other handles too |
| 840 | if ( redirect ) |
| 841 | { |
| 842 | ::CloseHandle(pipeOut.Detach(wxPipe::Read)); |
| 843 | ::CloseHandle(pipeErr.Detach(wxPipe::Read)); |
| 844 | } |
| 845 | #endif // wxUSE_STREAMS |
| 846 | |
| 847 | wxLogSysError(_("Execution of command '%s' failed"), command.c_str()); |
| 848 | |
| 849 | return flags & wxEXEC_SYNC ? -1 : 0; |
| 850 | } |
| 851 | |
| 852 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 853 | // the input buffer bufOut is connected to stdout, this is why it is |
| 854 | // called bufOut and not bufIn |
| 855 | wxStreamTempInputBuffer bufOut, |
| 856 | bufErr; |
| 857 | |
| 858 | if ( redirect ) |
| 859 | { |
| 860 | // We can now initialize the wxStreams |
| 861 | wxPipeInputStream * |
| 862 | outStream = new wxPipeInputStream(pipeOut.Detach(wxPipe::Read)); |
| 863 | wxPipeInputStream * |
| 864 | errStream = new wxPipeInputStream(pipeErr.Detach(wxPipe::Read)); |
| 865 | wxPipeOutputStream * |
| 866 | inStream = new wxPipeOutputStream(hpipeStdinWrite); |
| 867 | |
| 868 | handler->SetPipeStreams(outStream, inStream, errStream); |
| 869 | |
| 870 | bufOut.Init(outStream); |
| 871 | bufErr.Init(errStream); |
| 872 | } |
| 873 | #endif // wxUSE_STREAMS |
| 874 | |
| 875 | // create a hidden window to receive notification about process |
| 876 | // termination |
| 877 | HWND hwnd = wxCreateHiddenWindow |
| 878 | ( |
| 879 | &gs_classForHiddenWindow, |
| 880 | wxMSWEXEC_WNDCLASSNAME, |
| 881 | (WNDPROC)wxExecuteWindowCbk |
| 882 | ); |
| 883 | |
| 884 | wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") ); |
| 885 | |
| 886 | // Alloc data |
| 887 | wxExecuteData *data = new wxExecuteData; |
| 888 | data->hProcess = pi.hProcess; |
| 889 | data->dwProcessId = pi.dwProcessId; |
| 890 | data->hWnd = hwnd; |
| 891 | data->state = (flags & wxEXEC_SYNC) != 0; |
| 892 | if ( flags & wxEXEC_SYNC ) |
| 893 | { |
| 894 | // handler may be !NULL for capturing program output, but we don't use |
| 895 | // it wxExecuteData struct in this case |
| 896 | data->handler = NULL; |
| 897 | } |
| 898 | else |
| 899 | { |
| 900 | // may be NULL or not |
| 901 | data->handler = handler; |
| 902 | } |
| 903 | |
| 904 | DWORD tid; |
| 905 | HANDLE hThread = ::CreateThread(NULL, |
| 906 | 0, |
| 907 | wxExecuteThread, |
| 908 | (void *)data, |
| 909 | 0, |
| 910 | &tid); |
| 911 | |
| 912 | // resume process we created now - whether the thread creation succeeded or |
| 913 | // not |
| 914 | if ( ::ResumeThread(pi.hThread) == (DWORD)-1 ) |
| 915 | { |
| 916 | // ignore it - what can we do? |
| 917 | wxLogLastError(wxT("ResumeThread in wxExecute")); |
| 918 | } |
| 919 | |
| 920 | // close unneeded handle |
| 921 | if ( !::CloseHandle(pi.hThread) ) |
| 922 | wxLogLastError(wxT("CloseHandle(hThread)")); |
| 923 | |
| 924 | if ( !hThread ) |
| 925 | { |
| 926 | wxLogLastError(wxT("CreateThread in wxExecute")); |
| 927 | |
| 928 | DestroyWindow(hwnd); |
| 929 | delete data; |
| 930 | |
| 931 | // the process still started up successfully... |
| 932 | return pi.dwProcessId; |
| 933 | } |
| 934 | |
| 935 | gs_asyncThreads.push_back(hThread); |
| 936 | |
| 937 | #if wxUSE_IPC && !defined(__WXWINCE__) |
| 938 | // second part of DDE hack: now establish the DDE conversation with the |
| 939 | // just launched process |
| 940 | if ( !ddeServer.empty() ) |
| 941 | { |
| 942 | bool ok; |
| 943 | |
| 944 | // give the process the time to init itself |
| 945 | // |
| 946 | // we use a very big timeout hoping that WaitForInputIdle() will return |
| 947 | // much sooner, but not INFINITE just in case the process hangs |
| 948 | // completely - like this we will regain control sooner or later |
| 949 | switch ( ::WaitForInputIdle(pi.hProcess, 10000 /* 10 seconds */) ) |
| 950 | { |
| 951 | default: |
| 952 | wxFAIL_MSG( _T("unexpected WaitForInputIdle() return code") ); |
| 953 | // fall through |
| 954 | |
| 955 | case -1: |
| 956 | wxLogLastError(_T("WaitForInputIdle() in wxExecute")); |
| 957 | |
| 958 | case WAIT_TIMEOUT: |
| 959 | wxLogDebug(_T("Timeout too small in WaitForInputIdle")); |
| 960 | |
| 961 | ok = false; |
| 962 | break; |
| 963 | |
| 964 | case 0: |
| 965 | // ok, process ready to accept DDE requests |
| 966 | ok = wxExecuteDDE(ddeServer, ddeTopic, ddeCommand); |
| 967 | } |
| 968 | |
| 969 | if ( !ok ) |
| 970 | { |
| 971 | wxLogDebug(_T("Failed to send DDE request to the process \"%s\"."), |
| 972 | cmd.c_str()); |
| 973 | } |
| 974 | } |
| 975 | #endif // wxUSE_IPC |
| 976 | |
| 977 | if ( !(flags & wxEXEC_SYNC) ) |
| 978 | { |
| 979 | // clean up will be done when the process terminates |
| 980 | |
| 981 | // return the pid |
| 982 | return pi.dwProcessId; |
| 983 | } |
| 984 | |
| 985 | wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL; |
| 986 | wxCHECK_MSG( traits, -1, _T("no wxAppTraits in wxExecute()?") ); |
| 987 | |
| 988 | void *cookie = NULL; |
| 989 | if ( !(flags & wxEXEC_NODISABLE) ) |
| 990 | { |
| 991 | // disable all app windows while waiting for the child process to finish |
| 992 | cookie = traits->BeforeChildWaitLoop(); |
| 993 | } |
| 994 | |
| 995 | // wait until the child process terminates |
| 996 | while ( data->state ) |
| 997 | { |
| 998 | #if wxUSE_STREAMS && !defined(__WXWINCE__) |
| 999 | if ( !bufOut.Update() && !bufErr.Update() ) |
| 1000 | #endif // wxUSE_STREAMS |
| 1001 | { |
| 1002 | // don't eat 100% of the CPU -- ugly but anything else requires |
| 1003 | // real async IO which we don't have for the moment |
| 1004 | ::Sleep(50); |
| 1005 | } |
| 1006 | |
| 1007 | // we must process messages or we'd never get wxWM_PROC_TERMINATED |
| 1008 | traits->AlwaysYield(); |
| 1009 | } |
| 1010 | |
| 1011 | if ( !(flags & wxEXEC_NODISABLE) ) |
| 1012 | { |
| 1013 | // reenable disabled windows back |
| 1014 | traits->AfterChildWaitLoop(cookie); |
| 1015 | } |
| 1016 | |
| 1017 | DWORD dwExitCode = data->dwExitCode; |
| 1018 | delete data; |
| 1019 | |
| 1020 | // return the exit code |
| 1021 | return dwExitCode; |
| 1022 | } |
| 1023 | |
| 1024 | template <typename CharType> |
| 1025 | long wxExecuteImpl(CharType **argv, int flags, wxProcess *handler) |
| 1026 | { |
| 1027 | wxString command; |
| 1028 | command.reserve(1024); |
| 1029 | |
| 1030 | wxString arg; |
| 1031 | for ( ;; ) |
| 1032 | { |
| 1033 | arg = *argv++; |
| 1034 | |
| 1035 | bool quote; |
| 1036 | if ( arg.empty() ) |
| 1037 | { |
| 1038 | // we need to quote empty arguments, otherwise they'd just |
| 1039 | // disappear |
| 1040 | quote = true; |
| 1041 | } |
| 1042 | else // non-empty |
| 1043 | { |
| 1044 | // escape any quotes present in the string to avoid interfering |
| 1045 | // with the command line parsing in the child process |
| 1046 | arg.Replace("\"", "\\\"", true /* replace all */); |
| 1047 | |
| 1048 | // and quote any arguments containing the spaces to prevent them from |
| 1049 | // being broken down |
| 1050 | quote = arg.find_first_of(" \t") != wxString::npos; |
| 1051 | } |
| 1052 | |
| 1053 | if ( quote ) |
| 1054 | command += '\"' + arg + '\"'; |
| 1055 | else |
| 1056 | command += arg; |
| 1057 | |
| 1058 | if ( !*argv ) |
| 1059 | break; |
| 1060 | |
| 1061 | command += ' '; |
| 1062 | } |
| 1063 | |
| 1064 | return wxExecute(command, flags, handler); |
| 1065 | } |
| 1066 | |
| 1067 | long wxExecute(char **argv, int flags, wxProcess *handler) |
| 1068 | { |
| 1069 | return wxExecuteImpl(argv, flags, handler); |
| 1070 | } |
| 1071 | |
| 1072 | #if wxUSE_UNICODE |
| 1073 | |
| 1074 | long wxExecute(wchar_t **argv, int flags, wxProcess *handler) |
| 1075 | { |
| 1076 | return wxExecuteImpl(argv, flags, handler); |
| 1077 | } |
| 1078 | |
| 1079 | #endif // wxUSE_UNICODE |