+ // the IO redirection is only supported with wxUSE_STREAMS
+ BOOL redirect = FALSE;
+
+#if wxUSE_STREAMS
+ wxPipe pipeIn, pipeOut, pipeErr;
+
+ // we'll save here the copy of pipeIn[Write]
+ HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE;
+
+ // open the pipes to which child process IO will be redirected if needed
+ if ( handler && handler->IsRedirected() )
+ {
+ // create pipes for redirecting stdin, stdout and stderr
+ if ( !pipeIn.Create() || !pipeOut.Create() || !pipeErr.Create() )
+ {
+ wxLogSysError(_("Failed to redirect the child process IO"));
+
+ // indicate failure: we need to return different error code
+ // depending on the sync flag
+ return flags & wxEXEC_SYNC ? -1 : 0;
+ }
+
+ redirect = TRUE;
+ }
+#endif // wxUSE_STREAMS
+
+ // create the process
+ STARTUPINFO si;
+ wxZeroMemory(si);
+ si.cb = sizeof(si);
+
+#if wxUSE_STREAMS
+ if ( redirect )
+ {
+ si.dwFlags = STARTF_USESTDHANDLES;
+
+ si.hStdInput = pipeIn[wxPipe::Read];
+ si.hStdOutput = pipeOut[wxPipe::Write];
+ si.hStdError = pipeErr[wxPipe::Write];
+
+ // when the std IO is redirected, we don't show the (console) process
+ // window by default, but this can be overridden by the caller by
+ // specifying wxEXEC_NOHIDE flag
+ if ( !(flags & wxEXEC_NOHIDE) )
+ {
+ si.dwFlags |= STARTF_USESHOWWINDOW;
+ si.wShowWindow = SW_HIDE;
+ }
+
+ // we must duplicate the handle to the write side of stdin pipe to make
+ // it non inheritable: indeed, we must close the writing end of pipeIn
+ // before launching the child process as otherwise this handle will be
+ // inherited by the child which will never close it and so the pipe
+ // will never be closed and the child will be left stuck in ReadFile()
+ HANDLE pipeInWrite = pipeIn.Detach(wxPipe::Write);
+ if ( !::DuplicateHandle
+ (
+ ::GetCurrentProcess(),
+ pipeInWrite,
+ ::GetCurrentProcess(),
+ &hpipeStdinWrite,
+ 0, // desired access: unused here
+ FALSE, // not inherited
+ DUPLICATE_SAME_ACCESS // same access as for src handle
+ ) )
+ {
+ wxLogLastError(_T("DuplicateHandle"));
+ }
+
+ ::CloseHandle(pipeInWrite);
+ }
+#endif // wxUSE_STREAMS
+
+ PROCESS_INFORMATION pi;
+ DWORD dwFlags = CREATE_DEFAULT_ERROR_MODE | CREATE_SUSPENDED;
+
+ bool ok = ::CreateProcess
+ (
+ NULL, // application name (use only cmd line)
+ (wxChar *)
+ command.c_str(), // full command line
+ NULL, // security attributes: defaults for both
+ NULL, // the process and its main thread
+ redirect, // inherit handles if we use pipes
+ dwFlags, // process creation flags
+ NULL, // environment (use the same)
+ NULL, // current directory (use the same)
+ &si, // startup info (unused here)
+ &pi // process info
+ ) != 0;
+
+#if wxUSE_STREAMS
+ // we can close the pipe ends used by child anyhow
+ if ( redirect )
+ {
+ ::CloseHandle(pipeIn.Detach(wxPipe::Read));
+ ::CloseHandle(pipeOut.Detach(wxPipe::Write));
+ ::CloseHandle(pipeErr.Detach(wxPipe::Write));
+ }
+#endif // wxUSE_STREAMS
+
+ if ( !ok )
+ {
+#if wxUSE_STREAMS
+ // close the other handles too
+ if ( redirect )
+ {
+ ::CloseHandle(pipeOut.Detach(wxPipe::Read));
+ ::CloseHandle(pipeErr.Detach(wxPipe::Read));
+ }
+#endif // wxUSE_STREAMS
+
+ wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
+
+ return flags & wxEXEC_SYNC ? -1 : 0;
+ }
+
+#if wxUSE_STREAMS
+ // the input buffer bufOut is connected to stdout, this is why it is
+ // called bufOut and not bufIn
+ wxStreamTempInputBuffer bufOut,
+ bufErr;
+
+ if ( redirect )
+ {
+ // We can now initialize the wxStreams
+ wxPipeInputStream *
+ outStream = new wxPipeInputStream(pipeOut.Detach(wxPipe::Read));
+ wxPipeInputStream *
+ errStream = new wxPipeInputStream(pipeErr.Detach(wxPipe::Read));
+ wxPipeOutputStream *
+ inStream = new wxPipeOutputStream(hpipeStdinWrite);
+
+ handler->SetPipeStreams(outStream, inStream, errStream);
+
+ bufOut.Init(outStream);
+ bufErr.Init(errStream);
+ }
+#endif // wxUSE_STREAMS
+
+ // register the class for the hidden window used for the notifications
+ if ( !gs_classForHiddenWindow )
+ {
+ gs_classForHiddenWindow = _T("wxHiddenWindow");
+
+ WNDCLASS wndclass;
+ wxZeroMemory(wndclass);
+ wndclass.lpfnWndProc = (WNDPROC)wxExecuteWindowCbk;
+ wndclass.hInstance = wxGetInstance();
+ wndclass.lpszClassName = gs_classForHiddenWindow;
+
+ if ( !::RegisterClass(&wndclass) )
+ {
+ wxLogLastError(wxT("RegisterClass(hidden window)"));
+ }
+ }
+
+ // create a hidden window to receive notification about process
+ // termination
+ HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL,
+ WS_OVERLAPPEDWINDOW,
+ 0, 0, 0, 0, NULL,
+ (HMENU)NULL, wxGetInstance(), 0);
+ wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") );
+
+ // Alloc data
+ wxExecuteData *data = new wxExecuteData;
+ data->hProcess = pi.hProcess;
+ data->dwProcessId = pi.dwProcessId;
+ data->hWnd = hwnd;
+ data->state = (flags & wxEXEC_SYNC) != 0;
+ if ( flags & wxEXEC_SYNC )
+ {
+ // handler may be !NULL for capturing program output, but we don't use
+ // it wxExecuteData struct in this case
+ data->handler = NULL;
+ }
+ else
+ {
+ // may be NULL or not
+ data->handler = handler;
+ }
+
+ DWORD tid;
+ HANDLE hThread = ::CreateThread(NULL,
+ 0,
+ wxExecuteThread,
+ (void *)data,
+ 0,
+ &tid);
+
+ // resume process we created now - whether the thread creation succeeded or
+ // not
+ if ( ::ResumeThread(pi.hThread) == (DWORD)-1 )
+ {
+ // ignore it - what can we do?
+ wxLogLastError(wxT("ResumeThread in wxExecute"));
+ }
+
+ // close unneeded handle
+ if ( !::CloseHandle(pi.hThread) )
+ wxLogLastError(wxT("CloseHandle(hThread)"));
+
+ if ( !hThread )
+ {
+ wxLogLastError(wxT("CreateThread in wxExecute"));
+
+ DestroyWindow(hwnd);
+ delete data;
+
+ // the process still started up successfully...
+ return pi.dwProcessId;
+ }
+
+ ::CloseHandle(hThread);
+
+#if wxUSE_IPC
+ // second part of DDE hack: now establish the DDE conversation with the
+ // just launched process
+ if ( !ddeServer.empty() )
+ {
+ bool ok;
+
+ // give the process the time to init itself
+ //
+ // we use a very big timeout hoping that WaitForInputIdle() will return
+ // much sooner, but not INFINITE just in case the process hangs
+ // completely - like this we will regain control sooner or later
+ switch ( ::WaitForInputIdle(pi.hProcess, 10000 /* 10 seconds */) )
+ {
+ default:
+ wxFAIL_MSG( _T("unexpected WaitForInputIdle() return code") );
+ // fall through
+
+ case -1:
+ wxLogLastError(_T("WaitForInputIdle() in wxExecute"));
+
+ case WAIT_TIMEOUT:
+ wxLogDebug(_T("Timeout too small in WaitForInputIdle"));
+
+ ok = FALSE;
+ break;
+
+ case 0:
+ // ok, process ready to accept DDE requests
+ ok = wxExecuteDDE(ddeServer, ddeTopic, ddeCommand);
+ }
+ }
+#endif // wxUSE_IPC
+
+ if ( !(flags & wxEXEC_SYNC) )
+ {
+ // clean up will be done when the process terminates
+
+ // return the pid
+ return pi.dwProcessId;
+ }
+
+ // disable all app windows while waiting for the child process to finish
+#if wxUSE_GUI
+
+ /*
+ We use a dirty hack here to disable all application windows (which we
+ must do because otherwise the calls to wxYield() could lead to some very
+ unexpected reentrancies in the users code) but to avoid losing
+ focus/activation entirely when the child process terminates which would
+ happen if we simply disabled everything using wxWindowDisabler. Indeed,
+ remember that Windows will never activate a disabled window and when the
+ last childs window is closed and Windows looks for a window to activate
+ all our windows are still disabled. There is no way to enable them in
+ time because we don't know when the childs windows are going to be
+ closed, so the solution we use here is to keep one special tiny frame
+ enabled all the time. Then when the child terminates it will get
+ activated and when we close it below -- after reenabling all the other
+ windows! -- the previously active window becomes activated again and
+ everything is ok.
+ */
+ wxWindow *winActive;
+ {
+ wxBusyCursor bc;
+
+ // first disable all existing windows
+ wxWindowDisabler wd;
+
+ // then create an "invisible" frame: it has minimal size, is positioned
+ // (hopefully) outside the screen and doesn't appear on the taskbar
+ winActive = new wxFrame
+ (
+ wxTheApp->GetTopWindow(),
+ -1,
+ _T(""),
+ wxPoint(32600, 32600),
+ wxSize(1, 1),
+ wxDEFAULT_FRAME_STYLE | wxFRAME_NO_TASKBAR
+ );
+ winActive->Show();
+#endif // wxUSE_GUI
+
+ // wait until the child process terminates
+ while ( data->state )
+ {
+#if wxUSE_STREAMS
+ bufOut.Update();
+ bufErr.Update();
+#endif // wxUSE_STREAMS
+
+ // don't eat 100% of the CPU -- ugly but anything else requires
+ // real async IO which we don't have for the moment
+ ::Sleep(50);
+
+#if wxUSE_GUI
+ // repaint the GUI
+ wxYield();
+#else // !GUI
+ // dispatch the messages to the hidden window so that it could
+ // process the wxWM_PROC_TERMINATED notification
+ MSG msg;
+ ::PeekMessage(&msg, hwnd, 0, 0, PM_REMOVE);
+#endif // GUI/!GUI
+ }
+
+#if wxUSE_GUI
+ }
+
+ // finally delete the dummy frame and, as wd has been already destroyed and
+ // the other windows reenabled, the activation is going to return to the
+ // window which had it before
+ winActive->Destroy();
+#endif // wxUSE_GUI
+
+ DWORD dwExitCode = data->dwExitCode;
+ delete data;
+
+ // return the exit code
+ return dwExitCode;
+#else // Win16
+ long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
+ if (instanceID < 32)
+ return flags & wxEXEC_SYNC ? -1 : 0;
+
+ if ( flags & wxEXEC_SYNC )
+ {
+ int running;
+ do
+ {
+ wxYield();
+ running = GetModuleUsage((HINSTANCE)instanceID);
+ } while (running);
+ }
+
+ return instanceID;
+#endif // Win16/32
projects / wxWidgets.git / blobdiff