#ifndef __WIN16__
if ( !::CloseHandle(hProcess) )
{
- wxLogLastError("CloseHandle(hProcess)");
+ wxLogLastError(wxT("CloseHandle(hProcess)"));
}
#endif
}
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);
HANDLE m_hInput;
};
-class wxPipeOutputStream: public wxOutputStream {
+class wxPipeOutputStream: public wxOutputStream
+{
public:
wxPipeOutputStream(HANDLE hOutput);
~wxPipeOutputStream();
::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;
}
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;
}
// ============================================================================
#ifdef __WIN32__
+
static DWORD wxExecuteThread(wxExecuteData *data)
{
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,
}
#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
// 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:<command>:DDE_SERVER:DDE_TOPIC:DDE_COMMAND in which
+ // of command: WX_DDE#<command>#DDE_SERVER#DDE_TOPIC#DDE_COMMAND in which
// case we execute just <command> 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('#') )
{
{
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
}
#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 h_readPipe[2];
- HANDLE h_writePipe[2];
- HANDLE h_oldreadPipe;
- HANDLE h_oldwritePipe;
- BOOL inheritHandles;
+ // 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
- inheritHandles = FALSE;
if ( handler && handler->IsRedirected() )
{
+ // default secutiry attributes
SECURITY_ATTRIBUTES security;
security.nLength = sizeof(security);
security.lpSecurityDescriptor = NULL;
security.bInheritHandle = TRUE;
- if (! ::CreatePipe(&h_readPipe[0], &h_readPipe[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(&h_writePipe[0], &h_writePipe[1], &security, 0) )
+ // and a stdout one
+ if ( !::CreatePipe(&hpipeStdout[0], &hpipeStdout[1], &security, 0) )
{
- ::CloseHandle(h_readPipe[0]);
- ::CloseHandle(h_readPipe[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
- h_oldreadPipe = GetStdHandle(STD_INPUT_HANDLE);
- h_oldwritePipe = GetStdHandle(STD_OUTPUT_HANDLE);
+ (void)::CreatePipe(&hpipeStderr[0], &hpipeStderr[1], &security, 0);
- SetStdHandle(STD_INPUT_HANDLE, h_readPipe[0]);
- SetStdHandle(STD_OUTPUT_HANDLE, h_writePipe[1]);
-
- inheritHandles = TRUE;
+ redirect = TRUE;
}
+#endif // wxUSE_STREAMS
// 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
- 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 ( !ok )
{
- if ( inheritHandles )
+#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(hpipeStdout[0]);
+ ::CloseHandle(hpipeStderr[0]);
}
+#endif // wxUSE_STREAMS
wxLogSysError(_("Execution of command '%s' failed"), command.c_str());
- return 0;
+ return sync ? -1 : 0;
}
- // Restore the old stdio handles
- if (inheritHandles) {
- SetStdHandle(STD_INPUT_HANDLE, h_oldreadPipe);
- SetStdHandle(STD_OUTPUT_HANDLE, h_oldwritePipe);
-
- ::CloseHandle(h_writePipe[1]);
- ::CloseHandle(h_readPipe[0]);
+#if wxUSE_STREAMS
+ if ( redirect )
+ {
// We can now initialize the wxStreams
- wxInputStream *processOutput = new wxPipeInputStream(h_writePipe[0]);
- wxOutputStream *processInput = new wxPipeOutputStream(h_readPipe[1]);
+ wxInputStream *inStream = new wxPipeInputStream(hpipeStdout[0]),
+ *errStream = new wxPipeInputStream(hpipeStderr[0]);
+ wxOutputStream *outStream = new wxPipeOutputStream(hpipeStdinWrite);
- handler->SetPipeStreams(processOutput, processInput);
+ handler->SetPipeStreams(inStream, outStream, errStream);
}
+#endif // wxUSE_STREAMS
// register the class for the hidden window used for the notifications
if ( !gs_classForHiddenWindow )
if ( !::RegisterClass(&wndclass) )
{
- wxLogLastError("RegisterClass(hidden window)");
+ wxLogLastError(wxT("RegisterClass(hidden window)"));
}
}
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
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;
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
// return the exit code
return dwExitCode;
-#endif // 0/1
#else // Win16
long instanceID = WinExec((LPCSTR) WXSTRINGCAST command, SW_SHOW);
if (instanceID < 32) return(0);
return wxExecute(command, sync, handler);
}
+#if wxUSE_GUI
+
// ----------------------------------------------------------------------------
// Metafile helpers
// ----------------------------------------------------------------------------
*y *= iHeightPels;
*y /= (iHeightMM * 100);
}
+
+#endif // wxUSE_GUI
projects / wxWidgets.git / blobdiff