X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cd6ce4a90c11b54cc00799d0e4611d858739a749..973ac5bbb2ca39f0f3e21b85c1c130d2215f1552:/src/msw/utilsexc.cpp diff --git a/src/msw/utilsexc.cpp b/src/msw/utilsexc.cpp index 4a5489086c..17eac58b19 100644 --- a/src/msw/utilsexc.cpp +++ b/src/msw/utilsexc.cpp @@ -1,12 +1,12 @@ ///////////////////////////////////////////////////////////////////////////// // Name: msw/utilsexec.cpp -// Purpose: Various utilities +// Purpose: wxExecute implementation for MSW // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ -// Copyright: (c) Julian Smart and Markus Holzem -// Licence: wxWindows license +// Copyright: (c) 1998-2002 wxWindows dev team +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// // ============================================================================ @@ -32,10 +32,12 @@ #include "wx/utils.h" #include "wx/app.h" #include "wx/intl.h" + #include "wx/log.h" + #if wxUSE_GUI // See 'dirty hack' below. + #include "wx/frame.h" + #endif #endif -#include "wx/log.h" - #ifdef __WIN32__ #include "wx/stream.h" #include "wx/process.h" @@ -45,7 +47,7 @@ #include -#if !defined(__GNUWIN32__) && !defined(__WXWINE__) && !defined(__SALFORDC__) +#if !defined(__GNUWIN32__) && !defined(__SALFORDC__) && !defined(__WXMICROWIN__) #include #ifndef __MWERKS__ #include @@ -57,8 +59,10 @@ #include #endif -#if defined(__WIN32__) && !defined(__WXWINE__) -#include +#if defined(__WIN32__) && !defined(__WXMICROWIN__) +#ifndef __UNIX__ + #include +#endif #ifndef __GNUWIN32__ #include @@ -108,7 +112,7 @@ public: #ifndef __WIN16__ if ( !::CloseHandle(hProcess) ) { - wxLogLastError("CloseHandle(hProcess)"); + wxLogLastError(wxT("CloseHandle(hProcess)")); } #endif } @@ -121,114 +125,167 @@ 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 ~wxPipeInputStream(); + + // returns TRUE if the pipe is still opened + bool IsOpened() const { return m_hInput != INVALID_HANDLE_VALUE; } + + // returns TRUE if there is any data to be read from the pipe + virtual bool CanRead() const; protected: size_t OnSysRead(void *buffer, size_t len); protected: HANDLE m_hInput; + + DECLARE_NO_COPY_CLASS(wxPipeInputStream) }; -class wxPipeOutputStream: public wxOutputStream { +class wxPipeOutputStream: public wxOutputStream +{ public: wxPipeOutputStream(HANDLE hOutput); - ~wxPipeOutputStream(); + virtual ~wxPipeOutputStream(); protected: size_t OnSysWrite(const void *buffer, size_t len); protected: HANDLE m_hOutput; + + DECLARE_NO_COPY_CLASS(wxPipeOutputStream) }; -// ================== -// wxPipeInputStream -// ================== +// define this to let wxexec.cpp know that we know what we're doing +#define _WX_USED_BY_WXEXECUTE_ +#include "../common/execcmn.cpp" -wxPipeInputStream::wxPipeInputStream(HANDLE hInput) -{ - m_hInput = hInput; -} +// ---------------------------------------------------------------------------- +// wxPipe represents a Win32 anonymous pipe +// ---------------------------------------------------------------------------- -wxPipeInputStream::~wxPipeInputStream() +class wxPipe { - ::CloseHandle(m_hInput); -} +public: + // the symbolic names for the pipe ends + enum Direction + { + Read, + Write + }; -size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) -{ - DWORD bytesRead; + // default ctor doesn't do anything + wxPipe() { m_handles[Read] = m_handles[Write] = INVALID_HANDLE_VALUE; } - m_lasterror = wxSTREAM_NOERROR; - if (! ::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) { - if (GetLastError() == ERROR_BROKEN_PIPE) - m_lasterror = wxSTREAM_EOF; - else - m_lasterror = wxSTREAM_READ_ERROR; + // create the pipe, return TRUE if ok, FALSE on error + bool Create() + { + // default secutiry attributes + SECURITY_ATTRIBUTES security; + + security.nLength = sizeof(security); + security.lpSecurityDescriptor = NULL; + security.bInheritHandle = TRUE; // to pass it to the child + + if ( !::CreatePipe(&m_handles[0], &m_handles[1], &security, 0) ) + { + wxLogSysError(_("Failed to create an anonymous pipe")); + + return FALSE; + } + + return TRUE; } - return bytesRead; -} -// ================== -// wxPipeOutputStream -// ================== + // return TRUE if we were created successfully + bool IsOk() const { return m_handles[Read] != INVALID_HANDLE_VALUE; } -wxPipeOutputStream::wxPipeOutputStream(HANDLE hOutput) -{ - m_hOutput = hOutput; -} + // return the descriptor for one of the pipe ends + HANDLE operator[](Direction which) const + { + wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles), + _T("invalid pipe index") ); -wxPipeOutputStream::~wxPipeOutputStream() -{ - ::CloseHandle(m_hOutput); -} + return m_handles[which]; + } -size_t wxPipeOutputStream::OnSysWrite(const void *buffer, size_t len) -{ - DWORD bytesRead; + // detach a descriptor, meaning that the pipe dtor won't close it, and + // return it + HANDLE Detach(Direction which) + { + wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_handles), + _T("invalid pipe index") ); - 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; + HANDLE handle = m_handles[which]; + m_handles[which] = INVALID_HANDLE_VALUE; + + return handle; } - return bytesRead; -} -#endif // __WIN32__ + // close the pipe descriptors + void Close() + { + for ( size_t n = 0; n < WXSIZEOF(m_handles); n++ ) + { + if ( m_handles[n] != INVALID_HANDLE_VALUE ) + { + ::CloseHandle(m_handles[n]); + m_handles[n] = INVALID_HANDLE_VALUE; + } + } + } + + // dtor closes the pipe descriptors + ~wxPipe() { Close(); } + +private: + HANDLE m_handles[2]; +}; + +#endif // wxUSE_STREAMS // ============================================================================ // implementation // ============================================================================ #ifdef __WIN32__ -static DWORD wxExecuteThread(wxExecuteData *data) + +// ---------------------------------------------------------------------------- +// process termination detecting support +// ---------------------------------------------------------------------------- + +// thread function for the thread monitoring the process termination +static DWORD __stdcall wxExecuteThread(void *arg) { - WaitForSingleObject(data->hProcess, INFINITE); + wxExecuteData * const data = (wxExecuteData *)arg; + + if ( ::WaitForSingleObject(data->hProcess, INFINITE) != WAIT_OBJECT_0 ) + { + wxLogDebug(_T("Waiting for the process termination failed!")); + } // get the exit code - if ( !GetExitCodeProcess(data->hProcess, &data->dwExitCode) ) + if ( !::GetExitCodeProcess(data->hProcess, &data->dwExitCode) ) { - wxLogLastError("GetExitCodeProcess"); + wxLogLastError(wxT("GetExitCodeProcess")); } wxASSERT_MSG( data->dwExitCode != STILL_ACTIVE, wxT("process should have terminated") ); // send a message indicating process termination to the window - SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data); + ::SendMessage(data->hWnd, wxWM_PROC_TERMINATED, 0, (LPARAM)data); return 0; } @@ -242,7 +299,7 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, { DestroyWindow(hWnd); // we don't need it any more - wxExecuteData *data = (wxExecuteData *)lParam; + wxExecuteData * const data = (wxExecuteData *)lParam; if ( data->handler ) { data->handler->OnTerminate((int)data->dwProcessId, @@ -265,16 +322,186 @@ LRESULT APIENTRY _EXPORT wxExecuteWindowCbk(HWND hWnd, UINT message, } else { - return DefWindowProc(hWnd, message, wParam, lParam); + return ::DefWindowProc(hWnd, message, wParam, lParam); } } + +// ============================================================================ +// implementation of IO redirection support classes +// ============================================================================ + +#if wxUSE_STREAMS + +// ---------------------------------------------------------------------------- +// wxPipeInputStreams +// ---------------------------------------------------------------------------- + +wxPipeInputStream::wxPipeInputStream(HANDLE hInput) +{ + m_hInput = hInput; +} + +wxPipeInputStream::~wxPipeInputStream() +{ + if ( m_hInput != INVALID_HANDLE_VALUE ) + ::CloseHandle(m_hInput); +} + +bool wxPipeInputStream::CanRead() const +{ + if ( !IsOpened() ) + return FALSE; + + 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 + ::CloseHandle(m_hInput); + + wxPipeInputStream *self = wxConstCast(this, wxPipeInputStream); + + self->m_hInput = INVALID_HANDLE_VALUE; + self->m_lasterror = wxSTREAM_EOF; + + nAvailable = 0; + } + + return nAvailable != 0; +} + +size_t wxPipeInputStream::OnSysRead(void *buffer, size_t len) +{ + if ( !IsOpened() ) + { + m_lasterror = wxSTREAM_EOF; + + return 0; + } + + DWORD bytesRead; + if ( !::ReadFile(m_hInput, buffer, len, &bytesRead, NULL) ) + { + m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE + ? wxSTREAM_EOF + : wxSTREAM_READ_ERROR; + } + + // bytesRead is set to 0, as desired, if an error occured + 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 bytesWritten; + + m_lasterror = wxSTREAM_NO_ERROR; + if ( !::WriteFile(m_hOutput, buffer, len, &bytesWritten, NULL) ) + { + m_lasterror = ::GetLastError() == ERROR_BROKEN_PIPE + ? wxSTREAM_EOF + : wxSTREAM_WRITE_ERROR; + } + + return bytesWritten; +} + +#endif // wxUSE_STREAMS + #endif // Win32 -long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) +// ============================================================================ +// wxExecute functions family +// ============================================================================ + +#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 = FALSE; + + 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 one first and then the other one if it + // failed + { + wxLogNull noErrors; + ok = conn->Execute(ddeCommand); + } + + if ( !ok ) + { + // now try request - but show the errors + ok = conn->Request(ddeCommand) != NULL; + } + } + + return ok; +} + +#endif // wxUSE_IPC + +long wxExecute(const wxString& cmd, int flags, wxProcess *handler) { wxCHECK_MSG( !!cmd, 0, wxT("empty command in wxExecute") ); +#if wxUSE_THREADS + // for many reasons, the code below breaks down if it's called from another + // thread -- this could be fixed, but as Unix versions don't support this + // neither I don't want to waste time on this now + wxASSERT_MSG( wxThread::IsMain(), + _T("wxExecute() can be called only from the main thread") ); +#endif // wxUSE_THREADS + 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 +509,17 @@ 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 +570,22 @@ 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 ( !(flags & wxEXEC_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 @@ -347,153 +595,146 @@ 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 + // the IO redirection is only supported with wxUSE_STREAMS + BOOL redirect = FALSE; - default: - commandName += *pc; - continue; // skip the next break - } - - // only reached for space not inside quotes - break; - } - wxString commandArgs = pc; +#if wxUSE_STREAMS + wxPipe pipeIn, pipeOut, pipeErr; - wxWindow *winTop = wxTheApp->GetTopWindow(); - HWND hwndTop = (HWND)(winTop ? winTop->GetHWND() : 0); + // we'll save here the copy of pipeIn[Write] + HANDLE hpipeStdinWrite = INVALID_HANDLE_VALUE; - 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 + // 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")); - if ( ((long)result) <= 32 ) - wxLogSysError(_("Can't execute command '%s'"), command.c_str()); + // indicate failure: we need to return different error code + // depending on the sync flag + return flags & wxEXEC_SYNC ? -1 : 0; + } - return result; -#else // 1 + redirect = TRUE; + } +#endif // wxUSE_STREAMS - HANDLE h_readPipe[2]; - HANDLE h_writePipe[2]; - HANDLE h_oldreadPipe; - HANDLE h_oldwritePipe; - BOOL inheritHandles; + // create the process + STARTUPINFO si; + wxZeroMemory(si); + si.cb = sizeof(si); - // open the pipes to which child process IO will be redirected if needed - inheritHandles = FALSE; - if ( handler && handler->IsRedirected() ) +#if wxUSE_STREAMS + if ( redirect ) { - SECURITY_ATTRIBUTES security; + si.dwFlags = STARTF_USESTDHANDLES; - security.nLength = sizeof(security); - security.lpSecurityDescriptor = NULL; - security.bInheritHandle = TRUE; + si.hStdInput = pipeIn[wxPipe::Read]; + si.hStdOutput = pipeOut[wxPipe::Write]; + si.hStdError = pipeErr[wxPipe::Write]; - if (! ::CreatePipe(&h_readPipe[0], &h_readPipe[1], &security, 0) ) + // 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) ) { - wxLogSysError(_("Can't create the inter-process read pipe")); - - return 0; + si.dwFlags |= STARTF_USESHOWWINDOW; + si.wShowWindow = SW_HIDE; } - if (! ::CreatePipe(&h_writePipe[0], &h_writePipe[1], &security, 0) ) + // 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 + ) ) { - ::CloseHandle(h_readPipe[0]); - ::CloseHandle(h_readPipe[1]); - - wxLogSysError(_("Can't create the inter-process write pipe")); - - return 0; + wxLogLastError(_T("DuplicateHandle")); } - // We need to save the old stdio handles to restore them after the call - // to CreateProcess - h_oldreadPipe = GetStdHandle(STD_INPUT_HANDLE); - h_oldwritePipe = GetStdHandle(STD_OUTPUT_HANDLE); - - SetStdHandle(STD_INPUT_HANDLE, h_readPipe[0]); - SetStdHandle(STD_OUTPUT_HANDLE, h_writePipe[1]); - - inheritHandles = TRUE; + ::CloseHandle(pipeInWrite); } - - // create the process - STARTUPINFO si; - wxZeroMemory(si); - - si.cb = sizeof(si); +#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 ( ::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 ( inheritHandles ) + if ( !ok ) + { +#if wxUSE_STREAMS + // close the other handles too + if ( redirect ) { - ::CloseHandle(h_writePipe[0]); - ::CloseHandle(h_writePipe[1]); - ::CloseHandle(h_readPipe[0]); - ::CloseHandle(h_readPipe[1]); + ::CloseHandle(pipeOut.Detach(wxPipe::Read)); + ::CloseHandle(pipeErr.Detach(wxPipe::Read)); } +#endif // wxUSE_STREAMS wxLogSysError(_("Execution of command '%s' failed"), command.c_str()); - return 0; + return flags & wxEXEC_SYNC ? -1 : 0; } - // Restore the old stdio handles - if (inheritHandles) { - SetStdHandle(STD_INPUT_HANDLE, h_oldreadPipe); - SetStdHandle(STD_OUTPUT_HANDLE, h_oldwritePipe); +#if wxUSE_STREAMS + // the input buffer bufOut is connected to stdout, this is why it is + // called bufOut and not bufIn + wxStreamTempInputBuffer bufOut, + bufErr; - ::CloseHandle(h_writePipe[1]); - ::CloseHandle(h_readPipe[0]); + if ( redirect ) + { // We can now initialize the wxStreams - wxInputStream *processOutput = new wxPipeInputStream(h_writePipe[0]); - wxOutputStream *processInput = new wxPipeOutputStream(h_readPipe[1]); + wxPipeInputStream * + outStream = new wxPipeInputStream(pipeOut.Detach(wxPipe::Read)); + wxPipeInputStream * + errStream = new wxPipeInputStream(pipeErr.Detach(wxPipe::Read)); + wxPipeOutputStream * + inStream = new wxPipeOutputStream(hpipeStdinWrite); - handler->SetPipeStreams(processOutput, processInput); + 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 ) @@ -508,7 +749,7 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) if ( !::RegisterClass(&wndclass) ) { - wxLogLastError("RegisterClass(hidden window)"); + wxLogLastError(wxT("RegisterClass(hidden window)")); } } @@ -525,11 +766,11 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) data->hProcess = pi.hProcess; data->dwProcessId = pi.dwProcessId; data->hWnd = hwnd; - data->state = sync; - if ( sync ) + data->state = (flags & wxEXEC_SYNC) != 0; + if ( flags & wxEXEC_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 @@ -541,7 +782,7 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) DWORD tid; HANDLE hThread = ::CreateThread(NULL, 0, - (LPTHREAD_START_ROUTINE)wxExecuteThread, + wxExecuteThread, (void *)data, 0, &tid); @@ -551,16 +792,16 @@ 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; @@ -569,23 +810,43 @@ 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 - if ( !sync ) + if ( !(flags & wxEXEC_SYNC) ) { // clean up will be done when the process terminates @@ -593,19 +854,76 @@ long wxExecute(const wxString& cmd, bool sync, wxProcess *handler) return pi.dwProcessId; } - // waiting until command executed (disable everything while doing it) + // 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 - while ( data->state ) - wxYield(); + // 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; @@ -613,67 +931,38 @@ 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); + if (instanceID < 32) + return flags & wxEXEC_SYNC ? -1 : 0; - if (sync) { + if ( flags & wxEXEC_SYNC ) + { int running; - do { + do + { wxYield(); running = GetModuleUsage((HINSTANCE)instanceID); } while (running); } - return(instanceID); + return instanceID; #endif // Win16/32 } -long wxExecute(char **argv, bool sync, wxProcess *handler) +long wxExecute(wxChar **argv, int flags, wxProcess *handler) { wxString command; - while ( *argv != NULL ) + for ( ;; ) { - command << *argv++ << ' '; - } - - command.RemoveLast(); - - return wxExecute(command, sync, handler); -} - -// ---------------------------------------------------------------------------- -// Metafile helpers -// ---------------------------------------------------------------------------- + command += *argv++; + if ( !*argv ) + break; -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); + command += _T(' '); + } - *x *= (iWidthMM * 100); - *x /= iWidthPels; - *y *= (iHeightMM * 100); - *y /= iHeightPels; + return wxExecute(command, flags, handler); } -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); -}