X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d9317fd47263a9521466156d7bf0f7988000bf15..a98f98ac6f4422f259fc3324975156f7554adf41:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 6df190c161..26f8ca415f 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -37,6 +37,7 @@ #include "wx/log.h" #ifdef __WIN32__ + #include "wx/stream.h" #include "wx/process.h" #endif @@ -74,6 +75,10 @@ #endif #include +#if wxUSE_IPC + #include "wx/dde.h" // for WX_DDE hack in wxExecute +#endif // wxUSE_IPC + // ---------------------------------------------------------------------------- // constants // ---------------------------------------------------------------------------- @@ -103,7 +108,7 @@ public: #ifndef __WIN16__ if ( !::CloseHandle(hProcess) ) { - wxLogLastError("CloseHandle(hProcess)"); + wxLogLastError(wxT("CloseHandle(hProcess)")); } #endif } @@ -116,11 +121,144 @@ public: bool state; // set to FALSE when the process finishes }; +#if defined(__WIN32__) && wxUSE_STREAMS + +// ---------------------------------------------------------------------------- +// wxPipeStreams +// ---------------------------------------------------------------------------- + +class wxPipeInputStream: public wxInputStream +{ +public: + wxPipeInputStream(HANDLE hInput); + ~wxPipeInputStream(); + + virtual bool Eof() const; + +protected: + size_t OnSysRead(void *buffer, size_t len); + +protected: + HANDLE m_hInput; +}; + +class wxPipeOutputStream: public wxOutputStream +{ +public: + wxPipeOutputStream(HANDLE hOutput); + ~wxPipeOutputStream(); + +protected: + size_t OnSysWrite(const void *buffer, size_t len); + +protected: + HANDLE m_hOutput; +}; + +// ================== +// wxPipeInputStream +// ================== + +wxPipeInputStream::wxPipeInputStream(HANDLE hInput) +{ + m_hInput = hInput; +} + +wxPipeInputStream::~wxPipeInputStream() +{ + ::CloseHandle(m_hInput); +} + +bool wxPipeInputStream::Eof() const +{ + DWORD nAvailable; + + // function name is misleading, it works with anon pipes as well + DWORD rc = ::PeekNamedPipe + ( + m_hInput, // handle + NULL, 0, // ptr to buffer and its size + NULL, // [out] bytes read + &nAvailable, // [out] bytes available + NULL // [out] bytes left + ); + + if ( !rc ) + { + if ( ::GetLastError() != ERROR_BROKEN_PIPE ) + { + // unexpected error + wxLogLastError(_T("PeekNamedPipe")); + } + + // don't try to continue reading from a pipe if an error occured or if + // it had been closed + return TRUE; + } + else + { + return nAvailable == 0; + } +} + +size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) +{ + // reading from a pipe may block if there is no more data, always check for + // EOF first + m_lasterror = wxSTREAM_NOERROR; + if ( Eof() ) + return 0; + + DWORD bytesRead; + if ( !::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) + { + if ( ::GetLastError() == ERROR_BROKEN_PIPE ) + m_lasterror = wxSTREAM_EOF; + else + m_lasterror = wxSTREAM_READ_ERROR; + } + + return bytesRead; +} + +// ================== +// wxPipeOutputStream +// ================== + +wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput) +{ + m_hOutput = hOutput; +} + +wxPipeOutputStream::~wxPipeOutputStream() +{ + ::CloseHandle(m_hOutput); +} + +size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len) +{ + DWORD bytesRead; + + m_lasterror = wxSTREAM_NOERROR; + if ( !::WriteFile(m_hOutput, buffer, len, &bytesRead, NULL) ) + { + if ( ::GetLastError() == ERROR_BROKEN_PIPE ) + m_lasterror = wxSTREAM_EOF; + else + m_lasterror = wxSTREAM_READ_ERROR; + } + + return bytesRead; +} + +#endif // __WIN32__ + // ============================================================================ // implementation // ============================================================================ #ifdef __WIN32__ + static DWORD wxExecuteThread(wxExecuteData *data) { WaitForSingleObject(data->hProcess, INFINITE); @@ -128,7 +266,7 @@ static DWORD wxExecuteThread(wxExecuteData *data) // get the exit code if ( !GetExitCodeProcess(data->hProcess, &data->dwExitCode) ) { - wxLogLastError("GetExitCodeProcess"); + wxLogLastError(wxT("GetExitCodeProcess")); } wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE, @@ -167,102 +305,260 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, // asynchronous execution - we should do the clean up delete data; } - } - return 0; + return 0; + } + else + { + return DefWindowProc(hWnd, message, wParam, lParam); + } } -#endif +#endif // Win32 -long wxExecute(const wxString& command, bool sync, wxProcess *handler) +long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) { - wxCHECK_MSG( !!command, 0, wxT("empty command in wxExecute") ); + wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") ); + + wxString command; + +#if wxUSE_IPC + // DDE hack: this is really not pretty, but we need to allow this for + // transparent handling of DDE servers in wxMimeTypesManager. Usually it + // returns the command which should be run to view/open/... a file of the + // given type. Sometimes, however, this command just launches the server + // and an additional DDE request must be made to really open the file. To + // keep all this well hidden from the application, we allow a special form + // of command: WX_DDE##DDE_SERVER#DDE_TOPIC#DDE_COMMAND in which + // case we execute just and process the rest below + wxString ddeServer, ddeTopic, ddeCommand; + static const size_t lenDdePrefix = 7; // strlen("WX_DDE:") + if ( cmd.Left(lenDdePrefix) == _T("WX_DDE#") ) + { + const wxChar *p = cmd.c_str() + 7; + while ( *p && *p != _T('#') ) + { + command += *p++; + } + + if ( *p ) + { + // skip '#' + p++; + } + else + { + wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); + } + + while ( *p && *p != _T('#') ) + { + ddeServer += *p++; + } + + if ( *p ) + { + // skip '#' + p++; + } + else + { + wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); + } + + while ( *p && *p != _T('#') ) + { + ddeTopic += *p++; + } + + if ( *p ) + { + // skip '#' + p++; + } + else + { + wxFAIL_MSG(_T("invalid WX_DDE command in wxExecute")); + } + + while ( *p ) + { + ddeCommand += *p++; + } + + // maybe we don't have to launch the DDE server at all - if it is + // already running, for example + wxDDEClient client; + wxLogNull nolog; + wxConnectionBase *conn = client.MakeConnection(_T(""), + ddeServer, + ddeTopic); + if ( conn ) + { + // FIXME we don't check the return code as for some strange reason + // it will sometimes be FALSE - it is probably a bug in our + // DDE code but I don't see anything wrong there + (void)conn->Execute(ddeCommand); + + // ok, the command executed - return value indicating success, + // making it up for async case as we really don't have any way to + // get the real PID of the DDE server here + return sync ? 0 : -1; + } + //else: couldn't establish DDE conversation, now try launching the app + // and sending the DDE request again + } + else +#endif // wxUSE_IPC + { + // no DDE + command = cmd; + } #if defined(__WIN32__) && !defined(__TWIN32__) - // the old code is disabled because we really need a process handle - // if we want to execute it asynchronously or even just get its - // return code and for this we must use CreateProcess() and not - // ShellExecute() -#if 0 - // isolate command and arguments - wxString commandName; - bool insideQuotes = FALSE; - const char *pc; - for ( pc = command.c_str(); *pc != '\0'; pc++ ) + + // the IO redirection is only supported with wxUSE_STREAMS + BOOL redirect = FALSE; +#if wxUSE_STREAMS + // the first elements are reading ends, the second are the writing ones + HANDLE hpipeStdin[2], + hpipeStdinWrite = INVALID_HANDLE_VALUE, + hpipeStdout[2], + hpipeStderr[2]; + + // open the pipes to which child process IO will be redirected if needed + if ( handler && handler->IsRedirected() ) { - switch ( *pc ) + // default secutiry attributes + SECURITY_ATTRIBUTES security; + + security.nLength = sizeof(security); + security.lpSecurityDescriptor = NULL; + security.bInheritHandle = TRUE; + + // create stdin pipe + if ( !::CreatePipe(&hpipeStdin[0], &hpipeStdin[1], &security, 0) ) { - case ' ': - case '\t': - if ( !insideQuotes ) - break; - // fall through - - case '"': - insideQuotes = !insideQuotes; - // fall through - - default: - commandName += *pc; - continue; // skip the next break + wxLogSysError(_("Can't create the inter-process read pipe")); + + // indicate failure in both cases + return sync ? -1 : 0; } - // only reached for space not inside quotes - break; + // and a stdout one + if ( !::CreatePipe(&hpipeStdout[0], &hpipeStdout[1], &security, 0) ) + { + ::CloseHandle(hpipeStdin[0]); + ::CloseHandle(hpipeStdin[1]); + + wxLogSysError(_("Can't create the inter-process write pipe")); + + return sync ? -1 : 0; + } + + (void)::CreatePipe(&hpipeStderr[0], &hpipeStderr[1], &security, 0); + + redirect = TRUE; } +#endif // wxUSE_STREAMS - wxString commandArgs = pc; - - wxWindow *winTop = wxTheApp->GetTopWindow(); - HWND hwndTop = (HWND)(winTop ? winTop->GetHWND() : 0); - - HANDLE result; -#ifdef __GNUWIN32__ - result = ShellExecute(hwndTop, - (const wchar_t)"open", - (const wchar_t)commandName, - (const wchar_t)commandArgs, - (const wchar_t)NULL, - SW_SHOWNORMAL); -#else // !GNUWIN32 - result = ShellExecute(hwndTop, "open", commandName, - commandArgs, NULL, SW_SHOWNORMAL); -#endif // GNUWIN32 - - if ( ((long)result) <= 32 ) - wxLogSysError(_("Can't execute command '%s'"), command.c_str()); - - return result; -#else // 1 // create the process STARTUPINFO si; wxZeroMemory(si); - si.cb = sizeof(si); +#if wxUSE_STREAMS + if ( redirect ) + { + // when the std IO is redirected, we don't show the (console) process + // window + si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW; + + si.hStdInput = hpipeStdin[0]; + si.hStdOutput = hpipeStdout[1]; + si.hStdError = hpipeStderr[1]; + + 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 hpipeStdin[1] 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() + if ( !::DuplicateHandle + ( + GetCurrentProcess(), + hpipeStdin[1], + GetCurrentProcess(), + &hpipeStdinWrite, + 0, // desired access: unused here + FALSE, // not inherited + DUPLICATE_SAME_ACCESS // same access as for src handle + ) ) + { + wxLogLastError(_T("DuplicateHandle")); + } + + ::CloseHandle(hpipeStdin[1]); + } +#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(hpipeStdin[0]); + ::CloseHandle(hpipeStdout[1]); + ::CloseHandle(hpipeStderr[1]); + } +#endif // wxUSE_STREAMS - if ( ::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 - FALSE, // don't inherit handles - CREATE_DEFAULT_ERROR_MODE, // flags - NULL, // environment (use the same) - NULL, // current directory (use the same) - &si, // startup info (unused here) - &pi // process info - ) == 0 ) + if ( !ok ) { +#if wxUSE_STREAMS + // close the other handles too + if ( redirect ) + { + ::CloseHandle(hpipeStdout[0]); + ::CloseHandle(hpipeStderr[0]); + } +#endif // wxUSE_STREAMS + wxLogSysError(_("Execution of command '%s' failed"), command.c_str()); - return 0; + return sync ? -1 : 0; } - // close unneeded handle - if ( !::CloseHandle(pi.hThread) ) - wxLogLastError("CloseHandle(hThread)"); +#if wxUSE_STREAMS + if ( redirect ) + { + // We can now initialize the wxStreams + wxInputStream *inStream = new wxPipeInputStream(hpipeStdout[0]), + *errStream = new wxPipeInputStream(hpipeStderr[0]); + wxOutputStream *outStream = new wxPipeOutputStream(hpipeStdinWrite); + handler->SetPipeStreams(inStream, outStream, errStream); + } +#endif // wxUSE_STREAMS + + // register the class for the hidden window used for the notifications if ( !gs_classForHiddenWindow ) { gs_classForHiddenWindow = _T("wxHiddenWindow"); @@ -275,16 +571,15 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) if ( !::RegisterClass(&wndclass) ) { - wxLogLastError("RegisterClass(hidden window)"); - - return FALSE; + wxLogLastError(wxT("RegisterClass(hidden window)")); } } // create a hidden window to receive notification about process // termination HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL, - 0, 0, 0, 0, 0, NULL, + WS_OVERLAPPEDWINDOW, + 0, 0, 0, 0, NULL, (HMENU)NULL, wxGetInstance(), 0); wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") ); @@ -296,8 +591,8 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) data->state = sync; if ( sync ) { - wxASSERT_MSG( !handler, wxT("wxProcess param ignored for sync execution") ); - + // handler may be !NULL for capturing program output, but we don't use + // it wxExecuteData struct in this case data->handler = NULL; } else @@ -314,9 +609,21 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) 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("CreateThread in wxExecute"); + wxLogLastError(wxT("CreateThread in wxExecute")); DestroyWindow(hwnd); delete data; @@ -325,6 +632,49 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) 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 ) + { + wxDDEClient client; + wxConnectionBase *conn; + + { + // try doing it the first time without error messages + wxLogNull nolog; + + conn = client.MakeConnection(_T(""), ddeServer, ddeTopic); + } + + if ( !conn ) + { + // give the app some time to initialize itself: in fact, a common + // reason for failure is that we tried to open DDE conversation too + // soon (before the app had time to setup its DDE server), so wait + // a bit and try again + ::Sleep(2000); + + wxConnectionBase *conn = client.MakeConnection(_T(""), + ddeServer, + ddeTopic); + if ( !conn ) + { + wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str()); + } + } + + if ( conn ) + { + // FIXME just as above we don't check Execute() return code + wxLogNull nolog; + (void)conn->Execute(ddeCommand); + } + } +#endif // wxUSE_IPC + if ( !sync ) { // clean up will be done when the process terminates @@ -333,16 +683,26 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) return pi.dwProcessId; } - // waiting until command executed + // waiting until command executed (disable everything while doing it) +#if wxUSE_GUI + { + wxBusyCursor bc; + + wxWindowDisabler wd; +#endif // wxUSE_GUI + while ( data->state ) wxYield(); +#if wxUSE_GUI + } +#endif // wxUSE_GUI + DWORD dwExitCode = data->dwExitCode; delete data; // return the exit code return dwExitCode; -#endif // 0/1 #else // Win16 long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW); if (instanceID < 32) return(0); @@ -373,6 +733,8 @@ long wxExecute(char **argv, bool sync, wxProcess *handler) return wxExecute(command, sync, handler); } +#if wxUSE_GUI + // ---------------------------------------------------------------------------- // Metafile helpers // ---------------------------------------------------------------------------- @@ -406,3 +768,5 @@ extern void HIMETRICToPixel(LONG *x, LONG *y) *y *= iHeightPels; *y /= (iHeightMM * 100); } + +#endif // wxUSE_GUI