X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/5e1febfacedfb966daaf4050c293e0833593df82..87df17a11b0017d31c09f767bd921abb27193bee:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 453b7efc5d..628d647ac2 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -108,7 +108,7 @@ public: #ifndef __WIN16__ if ( !::CloseHandle(hProcess) ) { - wxLogLastError("CloseHandle(hProcess)"); + wxLogLastError(wxT("CloseHandle(hProcess)")); } #endif } @@ -121,17 +121,20 @@ public: bool state; // set to FALSE when the process finishes }; +#if defined(__WIN32__) && wxUSE_STREAMS -#ifdef __WIN32__ // ---------------------------------------------------------------------------- // wxPipeStreams // ---------------------------------------------------------------------------- -class wxPipeInputStream: public wxInputStream { +class wxPipeInputStream: public wxInputStream +{ public: wxPipeInputStream(HANDLE hInput); ~wxPipeInputStream(); + virtual bool Eof() const; + protected: size_t OnSysRead(void *buffer, size_t len); @@ -139,7 +142,8 @@ protected: HANDLE m_hInput; }; -class wxPipeOutputStream: public wxOutputStream { +class wxPipeOutputStream: public wxOutputStream +{ public: wxPipeOutputStream(HANDLE hOutput); ~wxPipeOutputStream(); @@ -165,17 +169,55 @@ wxPipeInputStream::~wxPipeInputStream() ::CloseHandle(m_hInput); } -size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) +bool wxPipeInputStream::Eof() const { - DWORD bytesRead; + 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 (! ::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) { - if (GetLastError() == ERROR_BROKEN_PIPE) + 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; } @@ -198,12 +240,14 @@ 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) + 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; } @@ -214,6 +258,7 @@ size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len) // ============================================================================ #ifdef __WIN32__ + static DWORD wxExecuteThread(wxExecuteData *data) { WaitForSingleObject(data->hProcess, INFINITE); @@ -221,7 +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, @@ -270,11 +315,55 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, } #endif // Win32 +#if wxUSE_IPC + +// connect to the given server via DDE and ask it to execute the command +static bool wxExecuteDDE(const wxString& ddeServer, + const wxString& ddeTopic, + const wxString& ddeCommand) +{ + bool ok; + + wxDDEClient client; + wxConnectionBase *conn = client.MakeConnection(_T(""), + ddeServer, + ddeTopic); + if ( !conn ) + { + ok = FALSE; + } + else // connected to DDE server + { + // the added complication here is that although most + // programs use XTYP_EXECUTE for their DDE API, some + // important ones - like IE and other MS stuff - use + // XTYP_REQUEST! + // + // so we try it first and then the other one if it + // failed + { + wxLogNull noErrors; + ok = conn->Request(ddeCommand) != NULL; + } + + if ( !ok ) + { + // now try execute - but show the errors + ok = conn->Execute(ddeCommand); + } + } + + return ok; +} + +#endif // wxUSE_IPC + long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) { 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 @@ -282,12 +371,17 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) // 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 + // 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#") ) { + // speed up the concatenations below + ddeServer.reserve(256); + ddeTopic.reserve(256); + ddeCommand.reserve(256); + const wxChar *p = cmd.c_str() + 7; while ( *p && *p != _T('#') ) { @@ -338,6 +432,22 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) { ddeCommand += *p++; } + + // if we want to just launch the program and not wait for its + // termination, try to execute DDE command right now, it can succeed if + // the process is already running - but as it fails if it's not + // running, suppress any errors it might generate + if ( !sync ) + { + wxLogNull noErrors; + if ( wxExecuteDDE(ddeServer, ddeTopic, ddeCommand) ) + { + // a dummy PID - this is a hack, of course, but it's well worth + // it as we don't open a new server each time we're called + // which would be quite bad + return -1; + } + } } else #endif // wxUSE_IPC @@ -347,164 +457,148 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) } #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++ ) - { - switch ( *pc ) - { - case ' ': - case '\t': - if ( !insideQuotes ) - break; - // fall through - - case '"': - insideQuotes = !insideQuotes; - // fall through - - default: - commandName += *pc; - continue; // skip the next break - } - // only reached for space not inside quotes - break; - } - 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 - - HANDLE hpipeRead[2]; - HANDLE hpipeWrite[2]; - HANDLE hStdIn = INVALID_HANDLE_VALUE; - HANDLE hStdOut = INVALID_HANDLE_VALUE; - - // we need to inherit handles in the child process if we want to redirect - // its IO - BOOL inheritHandles = FALSE; + // 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], + hpipeStdout[2], + hpipeStderr[2]; + HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE; // open the pipes to which child process IO will be redirected if needed if ( handler && handler->IsRedirected() ) { + // default secutiry attributes SECURITY_ATTRIBUTES security; security.nLength = sizeof(security); security.lpSecurityDescriptor = NULL; security.bInheritHandle = TRUE; - if ( !::CreatePipe(&hpipeRead[0], &hpipeRead[1], &security, 0) ) + // create stdin pipe + if ( !::CreatePipe(&hpipeStdin[0], &hpipeStdin[1], &security, 0) ) { wxLogSysError(_("Can't create the inter-process read pipe")); - return 0; + // indicate failure in both cases + return sync ? -1 : 0; } - if ( !::CreatePipe(&hpipeWrite[0], &hpipeWrite[1], &security, 0) ) + // and a stdout one + if ( !::CreatePipe(&hpipeStdout[0], &hpipeStdout[1], &security, 0) ) { - ::CloseHandle(hpipeRead[0]); - ::CloseHandle(hpipeRead[1]); + ::CloseHandle(hpipeStdin[0]); + ::CloseHandle(hpipeStdin[1]); wxLogSysError(_("Can't create the inter-process write pipe")); - return 0; + return sync ? -1 : 0; } - // We need to save the old stdio handles to restore them after the call - // to CreateProcess - hStdIn = ::GetStdHandle(STD_INPUT_HANDLE); - hStdOut = ::GetStdHandle(STD_OUTPUT_HANDLE); + (void)::CreatePipe(&hpipeStderr[0], &hpipeStderr[1], &security, 0); - if ( !::SetStdHandle(STD_INPUT_HANDLE, hpipeRead[0]) || - !::SetStdHandle(STD_OUTPUT_HANDLE, hpipeWrite[1]) ) - { - wxLogDebug(_T("Failed to change stdin/out handles")); - } - - inheritHandles = TRUE; + redirect = TRUE; } +#endif // wxUSE_STREAMS // create the process STARTUPINFO si; wxZeroMemory(si); - si.cb = sizeof(si); - PROCESS_INFORMATION pi; - - 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 - inheritHandles, // inherit handles if we need pipes - CREATE_DEFAULT_ERROR_MODE | - CREATE_SUSPENDED, // flags - NULL, // environment (use the same) - NULL, // current directory (use the same) - &si, // startup info (unused here) - &pi // process info - ) == 0 ) +#if wxUSE_STREAMS + if ( redirect ) { - if ( inheritHandles ) + // 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 + ) ) { - ::CloseHandle(hpipeWrite[0]); - ::CloseHandle(hpipeWrite[1]); - ::CloseHandle(hpipeRead[0]); - ::CloseHandle(hpipeRead[1]); + wxLogLastError(_T("DuplicateHandle")); } - wxLogSysError(_("Execution of command '%s' failed"), command.c_str()); + ::CloseHandle(hpipeStdin[1]); + } +#endif // wxUSE_STREAMS - return 0; + 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 - // Restore the old stdio handles - if ( inheritHandles ) + if ( !ok ) { - if ( !::SetStdHandle(STD_INPUT_HANDLE, hStdIn) || - !::SetStdHandle(STD_OUTPUT_HANDLE, hStdOut) ) +#if wxUSE_STREAMS + // close the other handles too + if ( redirect ) { - wxLogDebug(_T("Failed to restore old stdin/out handles")); + ::CloseHandle(hpipeStdout[0]); + ::CloseHandle(hpipeStderr[0]); } +#endif // wxUSE_STREAMS - // they're still opened in child process - ::CloseHandle(hpipeWrite[1]); - ::CloseHandle(hpipeRead[0]); + wxLogSysError(_("Execution of command '%s' failed"), command.c_str()); + return sync ? -1 : 0; + } + +#if wxUSE_STREAMS + if ( redirect ) + { // We can now initialize the wxStreams - wxInputStream *inStream = new wxPipeInputStream(hpipeWrite[0]); - wxOutputStream *outStream = new wxPipeOutputStream(hpipeRead[1]); + wxInputStream *inStream = new wxPipeInputStream(hpipeStdout[0]), + *errStream = new wxPipeInputStream(hpipeStderr[0]); + wxOutputStream *outStream = new wxPipeOutputStream(hpipeStdinWrite); - handler->SetPipeStreams(inStream, outStream); + handler->SetPipeStreams(inStream, outStream, errStream); } +#endif // wxUSE_STREAMS // register the class for the hidden window used for the notifications if ( !gs_classForHiddenWindow ) @@ -519,7 +613,7 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) if ( !::RegisterClass(&wndclass) ) { - wxLogLastError("RegisterClass(hidden window)"); + wxLogLastError(wxT("RegisterClass(hidden window)")); } } @@ -562,16 +656,16 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) if ( ::ResumeThread(pi.hThread) == (DWORD)-1 ) { // ignore it - what can we do? - wxLogLastError("ResumeThread in wxExecute"); + wxLogLastError(wxT("ResumeThread in wxExecute")); } // close unneeded handle if ( !::CloseHandle(pi.hThread) ) - wxLogLastError("CloseHandle(hThread)"); + wxLogLastError(wxT("CloseHandle(hThread)")); if ( !hThread ) { - wxLogLastError("CreateThread in wxExecute"); + wxLogLastError(wxT("CreateThread in wxExecute")); DestroyWindow(hwnd); delete data; @@ -580,18 +674,38 @@ long wxExecute(const wxString& cmd, 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 ) + if ( !ddeServer.empty() ) { - wxDDEClient client; - wxConnectionBase *conn = client.MakeConnection(_T(""), - ddeServer, - ddeTopic); - if ( !conn || !conn->Execute(ddeCommand) ) + 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 */) ) { - wxLogError(_("Couldn't launch DDE server '%s'."), command.c_str()); + 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 @@ -624,7 +738,6 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) // return the exit code return dwExitCode; -#endif // 0/1 #else // Win16 long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW); if (instanceID < 32) return(0); @@ -655,36 +768,3 @@ long wxExecute(char **argv, bool sync, wxProcess *handler) return wxExecute(command, sync, handler); } -// ---------------------------------------------------------------------------- -// Metafile helpers -// ---------------------------------------------------------------------------- - -extern void PixelToHIMETRIC(LONG *x, LONG *y) -{ - ScreenHDC hdcRef; - - int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), - iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), - iWidthPels = GetDeviceCaps(hdcRef, HORZRES), - iHeightPels = GetDeviceCaps(hdcRef, VERTRES); - - *x *= (iWidthMM * 100); - *x /= iWidthPels; - *y *= (iHeightMM * 100); - *y /= iHeightPels; -} - -extern void HIMETRICToPixel(LONG *x, LONG *y) -{ - ScreenHDC hdcRef; - - int iWidthMM = GetDeviceCaps(hdcRef, HORZSIZE), - iHeightMM = GetDeviceCaps(hdcRef, VERTSIZE), - iWidthPels = GetDeviceCaps(hdcRef, HORZRES), - iHeightPels = GetDeviceCaps(hdcRef, VERTRES); - - *x *= iWidthPels; - *x /= (iWidthMM * 100); - *y *= iHeightPels; - *y /= (iHeightMM * 100); -}