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1 /////////////////////////////////////////////////////////////////////////////
2 // Name: exec.cpp
3 // Purpose: exec sample demonstrates wxExecute and related functions
4 // Author: Vadim Zeitlin
5 // Modified by:
6 // Created: 15.01.00
7 // RCS-ID: $Id$
8 // Copyright: (c) Vadim Zeitlin
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ============================================================================
13 // declarations
14 // ============================================================================
15
16 // ----------------------------------------------------------------------------
17 // headers
18 // ----------------------------------------------------------------------------
19
20 #if defined(__GNUG__) && !defined(__APPLE__)
21 #pragma implementation "exec.cpp"
22 #pragma interface "exec.cpp"
23 #endif
24
25 // For compilers that support precompilation, includes "wx/wx.h".
26 #include "wx/wxprec.h"
27
28 #ifdef __BORLANDC__
29 #pragma hdrstop
30 #endif
31
32 // for all others, include the necessary headers (this file is usually all you
33 // need because it includes almost all "standard" wxWidgets headers
34 #ifndef WX_PRECOMP
35 #include "wx/app.h"
36 #include "wx/log.h"
37 #include "wx/frame.h"
38 #include "wx/panel.h"
39
40 #include "wx/timer.h"
41
42 #include "wx/utils.h"
43 #include "wx/menu.h"
44
45 #include "wx/msgdlg.h"
46 #include "wx/textdlg.h"
47 #include "wx/filedlg.h"
48 #include "wx/choicdlg.h"
49
50 #include "wx/button.h"
51 #include "wx/textctrl.h"
52 #include "wx/listbox.h"
53
54 #include "wx/sizer.h"
55 #endif
56
57 #include "wx/txtstrm.h"
58 #include "wx/numdlg.h"
59 #include "wx/ffile.h"
60
61 #include "wx/process.h"
62
63 #include "wx/mimetype.h"
64
65 #ifdef __WINDOWS__
66 #include "wx/dde.h"
67 #endif // __WINDOWS__
68
69 // ----------------------------------------------------------------------------
70 // the usual application and main frame classes
71 // ----------------------------------------------------------------------------
72
73 // Define a new application type, each program should derive a class from wxApp
74 class MyApp : public wxApp
75 {
76 public:
77 // override base class virtuals
78 // ----------------------------
79
80 // this one is called on application startup and is a good place for the app
81 // initialization (doing it here and not in the ctor allows to have an error
82 // return: if OnInit() returns false, the application terminates)
83 virtual bool OnInit();
84 };
85
86 // Define an array of process pointers used by MyFrame
87 class MyPipedProcess;
88 WX_DEFINE_ARRAY_PTR(MyPipedProcess *, MyProcessesArray);
89
90 // Define a new frame type: this is going to be our main frame
91 class MyFrame : public wxFrame
92 {
93 public:
94 // ctor(s)
95 MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
96
97 // event handlers (these functions should _not_ be virtual)
98 void OnQuit(wxCommandEvent& event);
99
100 void OnKill(wxCommandEvent& event);
101
102 void OnClear(wxCommandEvent& event);
103
104 void OnSyncExec(wxCommandEvent& event);
105 void OnAsyncExec(wxCommandEvent& event);
106 void OnShell(wxCommandEvent& event);
107 void OnExecWithRedirect(wxCommandEvent& event);
108 void OnExecWithPipe(wxCommandEvent& event);
109
110 void OnPOpen(wxCommandEvent& event);
111
112 void OnFileExec(wxCommandEvent& event);
113
114 void OnAbout(wxCommandEvent& event);
115
116 // polling output of async processes
117 void OnTimer(wxTimerEvent& event);
118 void OnIdle(wxIdleEvent& event);
119
120 // for MyPipedProcess
121 void OnProcessTerminated(MyPipedProcess *process);
122 wxListBox *GetLogListBox() const { return m_lbox; }
123
124 private:
125 void ShowOutput(const wxString& cmd,
126 const wxArrayString& output,
127 const wxString& title);
128
129 void DoAsyncExec(const wxString& cmd);
130
131 void AddAsyncProcess(MyPipedProcess *process)
132 {
133 if ( m_running.IsEmpty() )
134 {
135 // we want to start getting the timer events to ensure that a
136 // steady stream of idle events comes in -- otherwise we
137 // wouldn't be able to poll the child process input
138 m_timerIdleWakeUp.Start(100);
139 }
140 //else: the timer is already running
141
142 m_running.Add(process);
143 }
144
145 void RemoveAsyncProcess(MyPipedProcess *process)
146 {
147 m_running.Remove(process);
148
149 if ( m_running.IsEmpty() )
150 {
151 // we don't need to get idle events all the time any more
152 m_timerIdleWakeUp.Stop();
153 }
154 }
155
156 // the PID of the last process we launched asynchronously
157 long m_pidLast;
158
159 // last command we executed
160 wxString m_cmdLast;
161
162 #ifdef __WINDOWS__
163 void OnDDEExec(wxCommandEvent& event);
164 void OnDDERequest(wxCommandEvent& event);
165
166 bool GetDDEServer();
167
168 // last params of a DDE transaction
169 wxString m_server,
170 m_topic,
171 m_cmdDde;
172 #endif // __WINDOWS__
173
174 wxListBox *m_lbox;
175
176 MyProcessesArray m_running;
177
178 // the idle event wake up timer
179 wxTimer m_timerIdleWakeUp;
180
181 // any class wishing to process wxWidgets events must use this macro
182 DECLARE_EVENT_TABLE()
183 };
184
185 // ----------------------------------------------------------------------------
186 // MyPipeFrame: allows the user to communicate with the child process
187 // ----------------------------------------------------------------------------
188
189 class MyPipeFrame : public wxFrame
190 {
191 public:
192 MyPipeFrame(wxFrame *parent,
193 const wxString& cmd,
194 wxProcess *process);
195
196 protected:
197 void OnTextEnter(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
198 void OnBtnSend(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
199 void OnBtnSendFile(wxCommandEvent& WXUNUSED(event));
200 void OnBtnGet(wxCommandEvent& WXUNUSED(event)) { DoGet(); }
201 void OnBtnClose(wxCommandEvent& WXUNUSED(event)) { DoClose(); }
202
203 void OnClose(wxCloseEvent& event);
204
205 void OnProcessTerm(wxProcessEvent& event);
206
207 void DoSend()
208 {
209 wxString s(m_textOut->GetValue());
210 s += _T('\n');
211 m_out.Write(s.c_str(), s.length());
212 m_textOut->Clear();
213
214 DoGet();
215 }
216
217 void DoGet();
218 void DoClose();
219
220 private:
221 void DoGetFromStream(wxTextCtrl *text, wxInputStream& in);
222 void DisableInput();
223 void DisableOutput();
224
225
226 wxProcess *m_process;
227
228 wxOutputStream &m_out;
229 wxInputStream &m_in,
230 &m_err;
231
232 wxTextCtrl *m_textOut,
233 *m_textIn,
234 *m_textErr;
235
236 DECLARE_EVENT_TABLE()
237 };
238
239 // ----------------------------------------------------------------------------
240 // wxProcess-derived classes
241 // ----------------------------------------------------------------------------
242
243 // This is the handler for process termination events
244 class MyProcess : public wxProcess
245 {
246 public:
247 MyProcess(MyFrame *parent, const wxString& cmd)
248 : wxProcess(parent), m_cmd(cmd)
249 {
250 m_parent = parent;
251 }
252
253 // instead of overriding this virtual function we might as well process the
254 // event from it in the frame class - this might be more convenient in some
255 // cases
256 virtual void OnTerminate(int pid, int status);
257
258 protected:
259 MyFrame *m_parent;
260 wxString m_cmd;
261 };
262
263 // A specialization of MyProcess for redirecting the output
264 class MyPipedProcess : public MyProcess
265 {
266 public:
267 MyPipedProcess(MyFrame *parent, const wxString& cmd)
268 : MyProcess(parent, cmd)
269 {
270 Redirect();
271 }
272
273 virtual void OnTerminate(int pid, int status);
274
275 virtual bool HasInput();
276 };
277
278 // A version of MyPipedProcess which also sends input to the stdin of the
279 // child process
280 class MyPipedProcess2 : public MyPipedProcess
281 {
282 public:
283 MyPipedProcess2(MyFrame *parent, const wxString& cmd, const wxString& input)
284 : MyPipedProcess(parent, cmd), m_input(input)
285 {
286 }
287
288 virtual bool HasInput();
289
290 private:
291 wxString m_input;
292 };
293
294 // ----------------------------------------------------------------------------
295 // constants
296 // ----------------------------------------------------------------------------
297
298 // IDs for the controls and the menu commands
299 enum
300 {
301 // menu items
302 Exec_Quit = 100,
303 Exec_Kill,
304 Exec_ClearLog,
305 Exec_SyncExec = 200,
306 Exec_AsyncExec,
307 Exec_Shell,
308 Exec_POpen,
309 Exec_OpenFile,
310 Exec_DDEExec,
311 Exec_DDERequest,
312 Exec_Redirect,
313 Exec_Pipe,
314 Exec_About = 300,
315
316 // control ids
317 Exec_Btn_Send = 1000,
318 Exec_Btn_SendFile,
319 Exec_Btn_Get,
320 Exec_Btn_Close
321 };
322
323 static const wxChar *DIALOG_TITLE = _T("Exec sample");
324
325 // ----------------------------------------------------------------------------
326 // event tables and other macros for wxWidgets
327 // ----------------------------------------------------------------------------
328
329 // the event tables connect the wxWidgets events with the functions (event
330 // handlers) which process them. It can be also done at run-time, but for the
331 // simple menu events like this the static method is much simpler.
332 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
333 EVT_MENU(Exec_Quit, MyFrame::OnQuit)
334 EVT_MENU(Exec_Kill, MyFrame::OnKill)
335 EVT_MENU(Exec_ClearLog, MyFrame::OnClear)
336
337 EVT_MENU(Exec_SyncExec, MyFrame::OnSyncExec)
338 EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
339 EVT_MENU(Exec_Shell, MyFrame::OnShell)
340 EVT_MENU(Exec_Redirect, MyFrame::OnExecWithRedirect)
341 EVT_MENU(Exec_Pipe, MyFrame::OnExecWithPipe)
342
343 EVT_MENU(Exec_POpen, MyFrame::OnPOpen)
344
345 EVT_MENU(Exec_OpenFile, MyFrame::OnFileExec)
346
347 #ifdef __WINDOWS__
348 EVT_MENU(Exec_DDEExec, MyFrame::OnDDEExec)
349 EVT_MENU(Exec_DDERequest, MyFrame::OnDDERequest)
350 #endif // __WINDOWS__
351
352 EVT_MENU(Exec_About, MyFrame::OnAbout)
353
354 EVT_IDLE(MyFrame::OnIdle)
355
356 EVT_TIMER(wxID_ANY, MyFrame::OnTimer)
357 END_EVENT_TABLE()
358
359 BEGIN_EVENT_TABLE(MyPipeFrame, wxFrame)
360 EVT_BUTTON(Exec_Btn_Send, MyPipeFrame::OnBtnSend)
361 EVT_BUTTON(Exec_Btn_SendFile, MyPipeFrame::OnBtnSendFile)
362 EVT_BUTTON(Exec_Btn_Get, MyPipeFrame::OnBtnGet)
363 EVT_BUTTON(Exec_Btn_Close, MyPipeFrame::OnBtnClose)
364
365 EVT_TEXT_ENTER(wxID_ANY, MyPipeFrame::OnTextEnter)
366
367 EVT_CLOSE(MyPipeFrame::OnClose)
368
369 EVT_END_PROCESS(wxID_ANY, MyPipeFrame::OnProcessTerm)
370 END_EVENT_TABLE()
371
372 // Create a new application object: this macro will allow wxWidgets to create
373 // the application object during program execution (it's better than using a
374 // static object for many reasons) and also declares the accessor function
375 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
376 // not wxApp)
377 IMPLEMENT_APP(MyApp)
378
379 // ============================================================================
380 // implementation
381 // ============================================================================
382
383 // ----------------------------------------------------------------------------
384 // the application class
385 // ----------------------------------------------------------------------------
386
387 // `Main program' equivalent: the program execution "starts" here
388 bool MyApp::OnInit()
389 {
390 // Create the main application window
391 MyFrame *frame = new MyFrame(_T("Exec wxWidgets sample"),
392 wxDefaultPosition, wxSize(500, 140));
393
394 // Show it and tell the application that it's our main window
395 frame->Show(true);
396 SetTopWindow(frame);
397
398 // success: wxApp::OnRun() will be called which will enter the main message
399 // loop and the application will run. If we returned false here, the
400 // application would exit immediately.
401 return true;
402 }
403
404 // ----------------------------------------------------------------------------
405 // main frame
406 // ----------------------------------------------------------------------------
407
408 #ifdef __VISUALC__
409 #pragma warning(disable: 4355) // this used in base member initializer list
410 #endif
411
412 // frame constructor
413 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
414 : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size),
415 m_timerIdleWakeUp(this)
416 {
417 m_pidLast = 0;
418
419 #ifdef __WXMAC__
420 // we need this in order to allow the about menu relocation, since ABOUT is
421 // not the default id of the about menu
422 wxApp::s_macAboutMenuItemId = Exec_About;
423 #endif
424
425 // create a menu bar
426 wxMenu *menuFile = new wxMenu(_T(""), wxMENU_TEAROFF);
427 menuFile->Append(Exec_Kill, _T("&Kill process...\tCtrl-K"),
428 _T("Kill a process by PID"));
429 menuFile->AppendSeparator();
430 menuFile->Append(Exec_ClearLog, _T("&Clear log\tCtrl-C"),
431 _T("Clear the log window"));
432 menuFile->AppendSeparator();
433 menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
434
435 wxMenu *execMenu = new wxMenu;
436 execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
437 _T("Launch a program and return when it terminates"));
438 execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
439 _T("Launch a program and return immediately"));
440 execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
441 _T("Launch a shell and execute a command in it"));
442 execMenu->AppendSeparator();
443 execMenu->Append(Exec_Redirect, _T("Capture command &output...\tCtrl-O"),
444 _T("Launch a program and capture its output"));
445 execMenu->Append(Exec_Pipe, _T("&Pipe through command..."),
446 _T("Pipe a string through a filter"));
447 execMenu->Append(Exec_POpen, _T("&Open a pipe to a command...\tCtrl-P"),
448 _T("Open a pipe to and from another program"));
449
450 execMenu->AppendSeparator();
451 execMenu->Append(Exec_OpenFile, _T("Open &file...\tCtrl-F"),
452 _T("Launch the command to open this kind of files"));
453 #ifdef __WINDOWS__
454 execMenu->AppendSeparator();
455 execMenu->Append(Exec_DDEExec, _T("Execute command via &DDE...\tCtrl-D"));
456 execMenu->Append(Exec_DDERequest, _T("Send DDE &request...\tCtrl-R"));
457 #endif
458
459 wxMenu *helpMenu = new wxMenu(_T(""), wxMENU_TEAROFF);
460 helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
461
462 // now append the freshly created menu to the menu bar...
463 wxMenuBar *menuBar = new wxMenuBar();
464 menuBar->Append(menuFile, _T("&File"));
465 menuBar->Append(execMenu, _T("&Exec"));
466 menuBar->Append(helpMenu, _T("&Help"));
467
468 // ... and attach this menu bar to the frame
469 SetMenuBar(menuBar);
470
471 // create the listbox in which we will show misc messages as they come
472 m_lbox = new wxListBox(this, wxID_ANY);
473 wxFont font(12, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL,
474 wxFONTWEIGHT_NORMAL);
475 if ( font.Ok() )
476 m_lbox->SetFont(font);
477
478 #if wxUSE_STATUSBAR
479 // create a status bar just for fun (by default with 1 pane only)
480 CreateStatusBar();
481 SetStatusText(_T("Welcome to wxWidgets exec sample!"));
482 #endif // wxUSE_STATUSBAR
483 }
484
485 // ----------------------------------------------------------------------------
486 // event handlers: file and help menu
487 // ----------------------------------------------------------------------------
488
489 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
490 {
491 // true is to force the frame to close
492 Close(true);
493 }
494
495 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
496 {
497 m_lbox->Clear();
498 }
499
500 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
501 {
502 wxMessageBox(_T("Exec wxWidgets Sample\n© 2000-2002 Vadim Zeitlin"),
503 _T("About Exec"), wxOK | wxICON_INFORMATION, this);
504 }
505
506 void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
507 {
508 long pid = wxGetNumberFromUser(_T("Please specify the process to kill"),
509 _T("Enter PID:"),
510 _T("Exec question"),
511 m_pidLast,
512 // we need the full unsigned int range
513 -INT_MAX, INT_MAX,
514 this);
515 if ( pid == -1 )
516 {
517 // cancelled
518 return;
519 }
520
521 static const wxString signalNames[] =
522 {
523 _T("Just test (SIGNONE)"),
524 _T("Hangup (SIGHUP)"),
525 _T("Interrupt (SIGINT)"),
526 _T("Quit (SIGQUIT)"),
527 _T("Illegal instruction (SIGILL)"),
528 _T("Trap (SIGTRAP)"),
529 _T("Abort (SIGABRT)"),
530 _T("Emulated trap (SIGEMT)"),
531 _T("FP exception (SIGFPE)"),
532 _T("Kill (SIGKILL)"),
533 _T("Bus (SIGBUS)"),
534 _T("Segment violation (SIGSEGV)"),
535 _T("System (SIGSYS)"),
536 _T("Broken pipe (SIGPIPE)"),
537 _T("Alarm (SIGALRM)"),
538 _T("Terminate (SIGTERM)"),
539 };
540
541 int sig = wxGetSingleChoiceIndex(_T("How to kill the process?"),
542 _T("Exec question"),
543 WXSIZEOF(signalNames), signalNames,
544 this);
545 switch ( sig )
546 {
547 default:
548 wxFAIL_MSG( _T("unexpected return value") );
549 // fall through
550
551 case -1:
552 // cancelled
553 return;
554
555 case wxSIGNONE:
556 case wxSIGHUP:
557 case wxSIGINT:
558 case wxSIGQUIT:
559 case wxSIGILL:
560 case wxSIGTRAP:
561 case wxSIGABRT:
562 case wxSIGEMT:
563 case wxSIGFPE:
564 case wxSIGKILL:
565 case wxSIGBUS:
566 case wxSIGSEGV:
567 case wxSIGSYS:
568 case wxSIGPIPE:
569 case wxSIGALRM:
570 case wxSIGTERM:
571 break;
572 }
573
574 if ( sig == 0 )
575 {
576 if ( wxProcess::Exists(pid) )
577 wxLogStatus(_T("Process %ld is running."), pid);
578 else
579 wxLogStatus(_T("No process with pid = %ld."), pid);
580 }
581 else // not SIGNONE
582 {
583 wxKillError rc = wxProcess::Kill(pid, (wxSignal)sig);
584 if ( rc == wxKILL_OK )
585 {
586 wxLogStatus(_T("Process %ld killed with signal %d."), pid, sig);
587 }
588 else
589 {
590 static const wxChar *errorText[] =
591 {
592 _T(""), // no error
593 _T("signal not supported"),
594 _T("permission denied"),
595 _T("no such process"),
596 _T("unspecified error"),
597 };
598
599 wxLogStatus(_T("Failed to kill process %ld with signal %d: %s"),
600 pid, sig, errorText[rc]);
601 }
602 }
603 }
604
605 // ----------------------------------------------------------------------------
606 // event handlers: exec menu
607 // ----------------------------------------------------------------------------
608
609 void MyFrame::DoAsyncExec(const wxString& cmd)
610 {
611 wxProcess *process = new MyProcess(this, cmd);
612 m_pidLast = wxExecute(cmd, wxEXEC_ASYNC, process);
613 if ( !m_pidLast )
614 {
615 wxLogError( _T("Execution of '%s' failed."), cmd.c_str() );
616
617 delete process;
618 }
619 else
620 {
621 wxLogStatus( _T("Process %ld (%s) launched."),
622 m_pidLast, cmd.c_str() );
623
624 m_cmdLast = cmd;
625 }
626 }
627
628 void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
629 {
630 wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
631 DIALOG_TITLE,
632 m_cmdLast);
633
634 if ( !cmd )
635 return;
636
637 wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
638
639 int code = wxExecute(cmd, wxEXEC_SYNC);
640
641 wxLogStatus(_T("Process '%s' terminated with exit code %d."),
642 cmd.c_str(), code);
643
644 m_cmdLast = cmd;
645 }
646
647 void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
648 {
649 wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
650 DIALOG_TITLE,
651 m_cmdLast);
652
653 if ( !cmd )
654 return;
655
656 DoAsyncExec(cmd);
657 }
658
659 void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
660 {
661 wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
662 DIALOG_TITLE,
663 m_cmdLast);
664
665 if ( !cmd )
666 return;
667
668 int code = wxShell(cmd);
669 wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
670 cmd.c_str(), code);
671 m_cmdLast = cmd;
672 }
673
674 void MyFrame::OnExecWithRedirect(wxCommandEvent& WXUNUSED(event))
675 {
676 wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
677 DIALOG_TITLE,
678 m_cmdLast);
679
680 if ( !cmd )
681 return;
682
683 bool sync;
684 switch ( wxMessageBox(_T("Execute it synchronously?"),
685 _T("Exec question"),
686 wxYES_NO | wxCANCEL | wxICON_QUESTION, this) )
687 {
688 case wxYES:
689 sync = true;
690 break;
691
692 case wxNO:
693 sync = false;
694 break;
695
696 default:
697 return;
698 }
699
700 if ( sync )
701 {
702 wxArrayString output, errors;
703 int code = wxExecute(cmd, output, errors);
704 wxLogStatus(_T("command '%s' terminated with exit code %d."),
705 cmd.c_str(), code);
706
707 if ( code != -1 )
708 {
709 ShowOutput(cmd, output, _T("Output"));
710 ShowOutput(cmd, errors, _T("Errors"));
711 }
712 }
713 else // async exec
714 {
715 MyPipedProcess *process = new MyPipedProcess(this, cmd);
716 if ( !wxExecute(cmd, wxEXEC_ASYNC, process) )
717 {
718 wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
719
720 delete process;
721 }
722 else
723 {
724 AddAsyncProcess(process);
725 }
726 }
727
728 m_cmdLast = cmd;
729 }
730
731 void MyFrame::OnExecWithPipe(wxCommandEvent& WXUNUSED(event))
732 {
733 if ( !m_cmdLast )
734 m_cmdLast = _T("tr [a-z] [A-Z]");
735
736 wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
737 DIALOG_TITLE,
738 m_cmdLast);
739
740 if ( !cmd )
741 return;
742
743 wxString input = wxGetTextFromUser(_T("Enter the string to send to it: "),
744 DIALOG_TITLE);
745 if ( !input )
746 return;
747
748 // always execute the filter asynchronously
749 MyPipedProcess2 *process = new MyPipedProcess2(this, cmd, input);
750 long pid = wxExecute(cmd, wxEXEC_ASYNC, process);
751 if ( pid )
752 {
753 wxLogStatus( _T("Process %ld (%s) launched."), pid, cmd.c_str() );
754
755 AddAsyncProcess(process);
756 }
757 else
758 {
759 wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
760
761 delete process;
762 }
763
764 m_cmdLast = cmd;
765 }
766
767 void MyFrame::OnPOpen(wxCommandEvent& WXUNUSED(event))
768 {
769 wxString cmd = wxGetTextFromUser(_T("Enter the command to launch: "),
770 DIALOG_TITLE,
771 m_cmdLast);
772 if ( cmd.empty() )
773 return;
774
775 wxProcess *process = wxProcess::Open(cmd);
776 if ( !process )
777 {
778 wxLogError(_T("Failed to launch the command."));
779 return;
780 }
781
782 wxOutputStream *out = process->GetOutputStream();
783 if ( !out )
784 {
785 wxLogError(_T("Failed to connect to child stdin"));
786 return;
787 }
788
789 wxInputStream *in = process->GetInputStream();
790 if ( !in )
791 {
792 wxLogError(_T("Failed to connect to child stdout"));
793 return;
794 }
795
796 new MyPipeFrame(this, cmd, process);
797 }
798
799 void MyFrame::OnFileExec(wxCommandEvent& WXUNUSED(event))
800 {
801 static wxString s_filename;
802
803 wxString filename = wxLoadFileSelector(_T(""), _T(""), s_filename);
804 if ( !filename )
805 return;
806
807 s_filename = filename;
808
809 wxString ext = filename.AfterFirst(_T('.'));
810 wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
811 if ( !ft )
812 {
813 wxLogError(_T("Impossible to determine the file type for extension '%s'"),
814 ext.c_str());
815 return;
816 }
817
818 wxString cmd;
819 bool ok = ft->GetOpenCommand(&cmd,
820 wxFileType::MessageParameters(filename, _T("")));
821 delete ft;
822 if ( !ok )
823 {
824 wxLogError(_T("Impossible to find out how to open files of extension '%s'"),
825 ext.c_str());
826 return;
827 }
828
829 DoAsyncExec(cmd);
830 }
831
832 // ----------------------------------------------------------------------------
833 // DDE stuff
834 // ----------------------------------------------------------------------------
835
836 #ifdef __WINDOWS__
837
838 bool MyFrame::GetDDEServer()
839 {
840 wxString server = wxGetTextFromUser(_T("Server to connect to:"),
841 DIALOG_TITLE, m_server);
842 if ( !server )
843 return false;
844
845 m_server = server;
846
847 wxString topic = wxGetTextFromUser(_T("DDE topic:"), DIALOG_TITLE, m_topic);
848 if ( !topic )
849 return false;
850
851 m_topic = topic;
852
853 wxString cmd = wxGetTextFromUser(_T("DDE command:"), DIALOG_TITLE, m_cmdDde);
854 if ( !cmd )
855 return false;
856
857 m_cmdDde = cmd;
858
859 return true;
860 }
861
862 void MyFrame::OnDDEExec(wxCommandEvent& WXUNUSED(event))
863 {
864 if ( !GetDDEServer() )
865 return;
866
867 wxDDEClient client;
868 wxConnectionBase *conn = client.MakeConnection(_T(""), m_server, m_topic);
869 if ( !conn )
870 {
871 wxLogError(_T("Failed to connect to the DDE server '%s'."),
872 m_server.c_str());
873 }
874 else
875 {
876 if ( !conn->Execute(m_cmdDde) )
877 {
878 wxLogError(_T("Failed to execute command '%s' via DDE."),
879 m_cmdDde.c_str());
880 }
881 else
882 {
883 wxLogStatus(_T("Successfully executed DDE command"));
884 }
885 }
886 }
887
888 void MyFrame::OnDDERequest(wxCommandEvent& WXUNUSED(event))
889 {
890 if ( !GetDDEServer() )
891 return;
892
893 wxDDEClient client;
894 wxConnectionBase *conn = client.MakeConnection(_T(""), m_server, m_topic);
895 if ( !conn )
896 {
897 wxLogError(_T("Failed to connect to the DDE server '%s'."),
898 m_server.c_str());
899 }
900 else
901 {
902 if ( !conn->Request(m_cmdDde) )
903 {
904 wxLogError(_T("Failed to send request '%s' via DDE."),
905 m_cmdDde.c_str());
906 }
907 else
908 {
909 wxLogStatus(_T("Successfully sent DDE request."));
910 }
911 }
912 }
913
914 #endif // __WINDOWS__
915
916 // ----------------------------------------------------------------------------
917 // various helpers
918 // ----------------------------------------------------------------------------
919
920 // input polling
921 void MyFrame::OnIdle(wxIdleEvent& event)
922 {
923 size_t count = m_running.GetCount();
924 for ( size_t n = 0; n < count; n++ )
925 {
926 if ( m_running[n]->HasInput() )
927 {
928 event.RequestMore();
929 }
930 }
931 }
932
933 void MyFrame::OnTimer(wxTimerEvent& WXUNUSED(event))
934 {
935 wxWakeUpIdle();
936 }
937
938 void MyFrame::OnProcessTerminated(MyPipedProcess *process)
939 {
940 RemoveAsyncProcess(process);
941 }
942
943
944 void MyFrame::ShowOutput(const wxString& cmd,
945 const wxArrayString& output,
946 const wxString& title)
947 {
948 size_t count = output.GetCount();
949 if ( !count )
950 return;
951
952 m_lbox->Append(wxString::Format(_T("--- %s of '%s' ---"),
953 title.c_str(), cmd.c_str()));
954
955 for ( size_t n = 0; n < count; n++ )
956 {
957 m_lbox->Append(output[n]);
958 }
959
960 m_lbox->Append(wxString::Format(_T("--- End of %s ---"),
961 title.Lower().c_str()));
962 }
963
964 // ----------------------------------------------------------------------------
965 // MyProcess
966 // ----------------------------------------------------------------------------
967
968 void MyProcess::OnTerminate(int pid, int status)
969 {
970 wxLogStatus(m_parent, _T("Process %u ('%s') terminated with exit code %d."),
971 pid, m_cmd.c_str(), status);
972
973 // we're not needed any more
974 delete this;
975 }
976
977 // ----------------------------------------------------------------------------
978 // MyPipedProcess
979 // ----------------------------------------------------------------------------
980
981 bool MyPipedProcess::HasInput()
982 {
983 bool hasInput = false;
984
985 if ( IsInputAvailable() )
986 {
987 wxTextInputStream tis(*GetInputStream());
988
989 // this assumes that the output is always line buffered
990 wxString msg;
991 msg << m_cmd << _T(" (stdout): ") << tis.ReadLine();
992
993 m_parent->GetLogListBox()->Append(msg);
994
995 hasInput = true;
996 }
997
998 if ( IsErrorAvailable() )
999 {
1000 wxTextInputStream tis(*GetErrorStream());
1001
1002 // this assumes that the output is always line buffered
1003 wxString msg;
1004 msg << m_cmd << _T(" (stderr): ") << tis.ReadLine();
1005
1006 m_parent->GetLogListBox()->Append(msg);
1007
1008 hasInput = true;
1009 }
1010
1011 return hasInput;
1012 }
1013
1014 void MyPipedProcess::OnTerminate(int pid, int status)
1015 {
1016 // show the rest of the output
1017 while ( HasInput() )
1018 ;
1019
1020 m_parent->OnProcessTerminated(this);
1021
1022 MyProcess::OnTerminate(pid, status);
1023 }
1024
1025 // ----------------------------------------------------------------------------
1026 // MyPipedProcess2
1027 // ----------------------------------------------------------------------------
1028
1029 bool MyPipedProcess2::HasInput()
1030 {
1031 if ( !!m_input )
1032 {
1033 wxTextOutputStream os(*GetOutputStream());
1034 os.WriteString(m_input);
1035
1036 CloseOutput();
1037 m_input.clear();
1038
1039 // call us once again - may be we'll have output
1040 return true;
1041 }
1042
1043 return MyPipedProcess::HasInput();
1044 }
1045
1046 // ============================================================================
1047 // MyPipeFrame implementation
1048 // ============================================================================
1049
1050 MyPipeFrame::MyPipeFrame(wxFrame *parent,
1051 const wxString& cmd,
1052 wxProcess *process)
1053 : wxFrame(parent, wxID_ANY, cmd),
1054 m_process(process),
1055 // in a real program we'd check that the streams are !NULL here
1056 m_in(*process->GetInputStream()),
1057 m_err(*process->GetErrorStream()),
1058 m_out(*process->GetOutputStream())
1059 {
1060 m_process->SetNextHandler(this);
1061
1062 wxPanel *panel = new wxPanel(this, wxID_ANY);
1063
1064 m_textOut = new wxTextCtrl(panel, wxID_ANY, _T(""),
1065 wxDefaultPosition, wxDefaultSize,
1066 wxTE_PROCESS_ENTER);
1067 m_textIn = new wxTextCtrl(panel, wxID_ANY, _T(""),
1068 wxDefaultPosition, wxDefaultSize,
1069 wxTE_MULTILINE | wxTE_RICH);
1070 m_textIn->SetEditable(false);
1071 m_textErr = new wxTextCtrl(panel, wxID_ANY, _T(""),
1072 wxDefaultPosition, wxDefaultSize,
1073 wxTE_MULTILINE | wxTE_RICH);
1074 m_textErr->SetEditable(false);
1075
1076 wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
1077 sizerTop->Add(m_textOut, 0, wxGROW | wxALL, 5);
1078
1079 wxSizer *sizerBtns = new wxBoxSizer(wxHORIZONTAL);
1080 sizerBtns->
1081 Add(new wxButton(panel, Exec_Btn_Send, _T("&Send")), 0, wxALL, 5);
1082 sizerBtns->
1083 Add(new wxButton(panel, Exec_Btn_SendFile, _T("&File...")), 0, wxALL, 5);
1084 sizerBtns->
1085 Add(new wxButton(panel, Exec_Btn_Get, _T("&Get")), 0, wxALL, 5);
1086 sizerBtns->
1087 Add(new wxButton(panel, Exec_Btn_Close, _T("&Close")), 0, wxALL, 5);
1088
1089 sizerTop->Add(sizerBtns, 0, wxCENTRE | wxALL, 5);
1090 sizerTop->Add(m_textIn, 1, wxGROW | wxALL, 5);
1091 sizerTop->Add(m_textErr, 1, wxGROW | wxALL, 5);
1092
1093 panel->SetSizer(sizerTop);
1094 sizerTop->Fit(this);
1095
1096 Show();
1097 }
1098
1099 void MyPipeFrame::OnBtnSendFile(wxCommandEvent& WXUNUSED(event))
1100 {
1101 wxFileDialog filedlg(this, _T("Select file to send"));
1102 if ( filedlg.ShowModal() != wxID_OK )
1103 return;
1104
1105 wxFFile file(filedlg.GetFilename(), _T("r"));
1106 wxString data;
1107 if ( !file.IsOpened() || !file.ReadAll(&data) )
1108 return;
1109
1110 // can't write the entire string at once, this risk overflowing the pipe
1111 // and we would dead lock
1112 size_t len = data.length();
1113 const wxChar *pc = data.c_str();
1114 while ( len )
1115 {
1116 const size_t CHUNK_SIZE = 4096;
1117 m_out.Write(pc, len > CHUNK_SIZE ? CHUNK_SIZE : len);
1118
1119 // note that not all data could have been written as we don't block on
1120 // the write end of the pipe
1121 const size_t lenChunk = m_out.LastWrite();
1122
1123 pc += lenChunk;
1124 len -= lenChunk;
1125
1126 DoGet();
1127 }
1128 }
1129
1130 void MyPipeFrame::DoGet()
1131 {
1132 // we don't have any way to be notified when any input appears on the
1133 // stream so we have to poll it :-(
1134 DoGetFromStream(m_textIn, m_in);
1135 DoGetFromStream(m_textErr, m_err);
1136 }
1137
1138 void MyPipeFrame::DoGetFromStream(wxTextCtrl *text, wxInputStream& in)
1139 {
1140 while ( in.CanRead() )
1141 {
1142 wxChar buffer[4096];
1143 buffer[in.Read(buffer, WXSIZEOF(buffer) - 1).LastRead()] = _T('\0');
1144
1145 text->AppendText(buffer);
1146 }
1147 }
1148
1149 void MyPipeFrame::DoClose()
1150 {
1151 m_process->CloseOutput();
1152
1153 DisableInput();
1154 }
1155
1156 void MyPipeFrame::DisableInput()
1157 {
1158 m_textOut->SetEditable(false);
1159 FindWindow(Exec_Btn_Send)->Disable();
1160 FindWindow(Exec_Btn_SendFile)->Disable();
1161 FindWindow(Exec_Btn_Close)->Disable();
1162 }
1163
1164 void MyPipeFrame::DisableOutput()
1165 {
1166 FindWindow(Exec_Btn_Get)->Disable();
1167 }
1168
1169 void MyPipeFrame::OnClose(wxCloseEvent& event)
1170 {
1171 if ( m_process )
1172 {
1173 // we're not interested in getting the process termination notification
1174 // if we are closing it ourselves
1175 wxProcess *process = m_process;
1176 m_process = NULL;
1177 process->SetNextHandler(NULL);
1178
1179 process->CloseOutput();
1180 }
1181
1182 event.Skip();
1183 }
1184
1185 void MyPipeFrame::OnProcessTerm(wxProcessEvent& WXUNUSED(event))
1186 {
1187 DoGet();
1188
1189 delete m_process;
1190 m_process = NULL;
1191
1192 wxLogWarning(_T("The other process has terminated, closing"));
1193
1194 DisableInput();
1195 DisableOutput();
1196 }