X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/837e57436a89516a5fa9f478f401e06bd872c17c..f20ad12c585a0bca3b2de19fe5a4b6cb89de21c6:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 0c566962da..8fcae76c3c 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: utilsexec.cpp +// Name: msw/utilsexec.cpp // Purpose: Various utilities // Author: Julian Smart // Modified by: @@ -9,48 +9,55 @@ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- + #ifdef __GNUG__ -#pragma implementation + #pragma implementation #endif // For compilers that support precompilation, includes "wx.h". #include "wx/wxprec.h" #ifdef __BORLANDC__ -#pragma hdrstop + #pragma hdrstop #endif #ifndef WX_PRECOMP -#include "wx/setup.h" -#include "wx/utils.h" -#include "wx/app.h" -#include "wx/intl.h" + #include "wx/utils.h" + #include "wx/app.h" + #include "wx/intl.h" #endif #include "wx/log.h" -#include "wx/process.h" -#include "wx/msw/private.h" +#ifdef __WIN32__ + #include "wx/stream.h" + #include "wx/process.h" +#endif -#include +#include "wx/msw/private.h" #include -#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__) -#include +#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__) + #include #ifndef __MWERKS__ -#include + #include #endif #endif -#ifdef __GNUWIN32__ -#ifndef __TWIN32__ -#include -#include -#endif +#if defined(__GNUWIN32__) && !defined(__TWIN32__) + #include + #include #endif -#if defined(__WIN32__) && !defined(__WXWINE__) +#if defined(__WIN32__) && !defined(__WXWINE__) && !defined(__WXMICROWIN__) #include #ifndef __GNUWIN32__ @@ -68,9 +75,30 @@ #endif #include +#if wxUSE_IPC + #include "wx/dde.h" // for WX_DDE hack in wxExecute +#endif // wxUSE_IPC + +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- + // this message is sent when the process we're waiting for terminates #define wxWM_PROC_TERMINATED (WM_USER + 10000) +// ---------------------------------------------------------------------------- +// this module globals +// ---------------------------------------------------------------------------- + +// we need to create a hidden window to receive the process termination +// notifications and for this we need a (Win) class name for it which we will +// register the first time it's needed +static const wxChar *gs_classForHiddenWindow = NULL; + +// ---------------------------------------------------------------------------- +// private types +// ---------------------------------------------------------------------------- + // structure describing the process we're being waiting for struct wxExecuteData { @@ -80,7 +108,7 @@ public: #ifndef __WIN16__ if ( !::CloseHandle(hProcess) ) { - wxLogLastError("CloseHandle(hProcess)"); + wxLogLastError(wxT("CloseHandle(hProcess)")); } #endif } @@ -93,27 +121,164 @@ 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) + +static DWORD __stdcall wxExecuteThread(void *arg) { + wxExecuteData *data = (wxExecuteData*)arg; + WaitForSingleObject(data->hProcess, INFINITE); // get the exit code if ( !GetExitCodeProcess(data->hProcess, &data->dwExitCode) ) { - wxLogLastError("GetExitCodeProcess"); + wxLogLastError(wxT("GetExitCodeProcess")); } wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE, - _T("process should have terminated") ); + wxT("process should have terminated") ); // send a message indicating process termination to the window SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data); return 0; } -#endif // window procedure of a hidden window which is created just to receive // the notification message when a process exits @@ -142,117 +307,325 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, // asynchronous execution - we should do the clean up delete data; } + + return 0; + } + else + { + return DefWindowProc(hWnd, message, wParam, lParam); + } +} +#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 0; + return ok; } -extern wxChar wxPanelClassName[]; +#endif // wxUSE_IPC -long wxExecute(const wxString& command, bool sync, wxProcess *handler) +long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) { - wxCHECK_MSG( !!command, 0, _T("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#") ) + { + // 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('#') ) + { + 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++; + } + + // 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 + { + // 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], + 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() ) { - 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 + wxLogSysError(_("Can't create the inter-process read pipe")); - case '"': - insideQuotes = !insideQuotes; - // fall through + // indicate failure in both cases + return sync ? -1 : 0; + } - default: - commandName += *pc; - continue; // skip the next 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; } - // only reached for space not inside quotes - break; + (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; -#ifdef __GNUWIN32__ - memset(&si, 0, sizeof(si)); -#else - ::ZeroMemory(&si, sizeof(si)); -#endif - + 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"); + + 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(wxPanelClassName, NULL, 0, 0, 0, 0, 0, NULL, + HWND hwnd = ::CreateWindow(gs_classForHiddenWindow, NULL, + WS_OVERLAPPEDWINDOW, + 0, 0, 0, 0, NULL, (HMENU)NULL, wxGetInstance(), 0); - wxASSERT_MSG( hwnd, _T("can't create a hidden window for wxExecute") ); - - FARPROC ExecuteWindowInstance = MakeProcInstance((FARPROC)wxExecuteWindowCbk, - wxGetInstance()); - - ::SetWindowLong(hwnd, GWL_WNDPROC, (LONG) ExecuteWindowInstance); + wxASSERT_MSG( hwnd, wxT("can't create a hidden window for wxExecute") ); // Alloc data wxExecuteData *data = new wxExecuteData; @@ -262,8 +635,8 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) data->state = sync; if ( sync ) { - wxASSERT_MSG( !handler, _T("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 @@ -275,14 +648,26 @@ long wxExecute(const wxString& command, bool sync, wxProcess *handler) DWORD tid; HANDLE hThread = ::CreateThread(NULL, 0, - (LPTHREAD_START_ROUTINE)wxExecuteThread, + 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("CreateThread in wxExecute"); + wxLogLastError(wxT("CreateThread in wxExecute")); DestroyWindow(hwnd); delete data; @@ -291,6 +676,42 @@ 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.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 ( !sync ) { // clean up will be done when the process terminates @@ -299,16 +720,26 @@ 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); @@ -339,33 +770,3 @@ long wxExecute(char **argv, bool sync, wxProcess *handler) return wxExecute(command, sync, handler); } -bool wxGetFullHostName(wxChar *buf, int maxSize) -{ -#if defined(__WIN32__) && !defined(__TWIN32__) - DWORD nSize = maxSize ; - if ( !::GetComputerName(buf, &nSize) ) - { - wxLogLastError("GetComputerName"); - - return FALSE; - } -#else - char *sysname; - const char *default_host = "noname"; -static const char WX_SECTION[] = "wxWindows"; -static const char eHOSTNAME[] = "HostName"; - - if ((sysname = getenv("SYSTEM_NAME")) == NULL) { - GetProfileString(WX_SECTION, eHOSTNAME, default_host, buf, maxSize - 1); - } else - strncpy(buf, sysname, maxSize - 1); - buf[maxSize] = '\0'; - if ( *buf == '\0' ) - { - wxLogLastError("GetComputerName"); - - return FALSE; - } -#endif - return TRUE; -}