samples/exec/exec.cpp

   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 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWidgets headers
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/log.h"
  32     #include "wx/frame.h"
  33     #include "wx/panel.h"
  34
  35     #include "wx/timer.h"
  36
  37     #include "wx/utils.h"
  38     #include "wx/menu.h"
  39
  40     #include "wx/msgdlg.h"
  41     #include "wx/textdlg.h"
  42     #include "wx/filedlg.h"
  43     #include "wx/choicdlg.h"
  44
  45     #include "wx/button.h"
  46     #include "wx/textctrl.h"
  47     #include "wx/listbox.h"
  48
  49     #include "wx/sizer.h"
  50 #endif
  51
  52 #include "wx/txtstrm.h"
  53 #include "wx/numdlg.h"
  54 #include "wx/textdlg.h"
  55 #include "wx/ffile.h"
  56
  57 #include "wx/process.h"
  58
  59 #include "wx/mimetype.h"
  60
  61 #ifdef __WINDOWS__
  62     #include "wx/dde.h"
  63 #endif // __WINDOWS__
  64
  65 // ----------------------------------------------------------------------------
  66 // the usual application and main frame classes
  67 // ----------------------------------------------------------------------------
  68
  69 // Define a new application type, each program should derive a class from wxApp
  70 class MyApp : public wxApp
  71 {
  72 public:
  73     // override base class virtuals
  74     // ----------------------------
  75
  76     // this one is called on application startup and is a good place for the app
  77     // initialization (doing it here and not in the ctor allows to have an error
  78     // return: if OnInit() returns false, the application terminates)
  79     virtual bool OnInit();
  80 };
  81
  82 // Define an array of process pointers used by MyFrame
  83 class MyPipedProcess;
  84 WX_DEFINE_ARRAY_PTR(MyPipedProcess *, MyProcessesArray);
  85
  86 // Define a new frame type: this is going to be our main frame
  87 class MyFrame : public wxFrame
  88 {
  89 public:
  90     // ctor(s)
  91     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  92
  93     // event handlers (these functions should _not_ be virtual)
  94     void OnQuit(wxCommandEvent& event);
  95
  96     void OnKill(wxCommandEvent& event);
  97
  98     void OnClear(wxCommandEvent& event);
  99
 100     void OnSyncExec(wxCommandEvent& event);
 101     void OnSyncNoEventsExec(wxCommandEvent& event);
 102     void OnAsyncExec(wxCommandEvent& event);
 103     void OnShell(wxCommandEvent& event);
 104     void OnExecWithRedirect(wxCommandEvent& event);
 105     void OnExecWithPipe(wxCommandEvent& event);
 106
 107     void OnPOpen(wxCommandEvent& event);
 108
 109     void OnFileExec(wxCommandEvent& event);
 110     void OnOpenURL(wxCommandEvent& event);
 111
 112     void OnAbout(wxCommandEvent& event);
 113
 114     // polling output of async processes
 115     void OnTimer(wxTimerEvent& event);
 116     void OnIdle(wxIdleEvent& event);
 117
 118     // for MyPipedProcess
 119     void OnProcessTerminated(MyPipedProcess *process);
 120     wxListBox *GetLogListBox() const { return m_lbox; }
 121
 122 private:
 123     void ShowOutput(const wxString& cmd,
 124                     const wxArrayString& output,
 125                     const wxString& title);
 126
 127     void DoAsyncExec(const wxString& cmd);
 128
 129     void AddAsyncProcess(MyPipedProcess *process)
 130     {
 131         if ( m_running.IsEmpty() )
 132         {
 133             // we want to start getting the timer events to ensure that a
 134             // steady stream of idle events comes in -- otherwise we
 135             // wouldn't be able to poll the child process input
 136             m_timerIdleWakeUp.Start(100);
 137         }
 138         //else: the timer is already running
 139
 140         m_running.Add(process);
 141     }
 142
 143     void RemoveAsyncProcess(MyPipedProcess *process)
 144     {
 145         m_running.Remove(process);
 146
 147         if ( m_running.IsEmpty() )
 148         {
 149             // we don't need to get idle events all the time any more
 150             m_timerIdleWakeUp.Stop();
 151         }
 152     }
 153
 154     // the PID of the last process we launched asynchronously
 155     long m_pidLast;
 156
 157     // last command we executed
 158     wxString m_cmdLast;
 159
 160 #ifdef __WINDOWS__
 161     void OnDDEExec(wxCommandEvent& event);
 162     void OnDDERequest(wxCommandEvent& event);
 163
 164     bool GetDDEServer();
 165
 166     // last params of a DDE transaction
 167     wxString m_server,
 168              m_topic,
 169              m_cmdDde;
 170 #endif // __WINDOWS__
 171
 172     wxListBox *m_lbox;
 173
 174     MyProcessesArray m_running;
 175
 176     // the idle event wake up timer
 177     wxTimer m_timerIdleWakeUp;
 178
 179     // any class wishing to process wxWidgets events must use this macro
 180     DECLARE_EVENT_TABLE()
 181 };
 182
 183 // ----------------------------------------------------------------------------
 184 // MyPipeFrame: allows the user to communicate with the child process
 185 // ----------------------------------------------------------------------------
 186
 187 class MyPipeFrame : public wxFrame
 188 {
 189 public:
 190     MyPipeFrame(wxFrame *parent,
 191                 const wxString& cmd,
 192                 wxProcess *process);
 193
 194 protected:
 195     void OnTextEnter(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 196     void OnBtnSend(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 197     void OnBtnSendFile(wxCommandEvent& WXUNUSED(event));
 198     void OnBtnGet(wxCommandEvent& WXUNUSED(event)) { DoGet(); }
 199     void OnBtnClose(wxCommandEvent& WXUNUSED(event)) { DoClose(); }
 200
 201     void OnClose(wxCloseEvent& event);
 202
 203     void OnProcessTerm(wxProcessEvent& event);
 204
 205     void DoSend()
 206     {
 207         wxString s(m_textOut->GetValue());
 208         s += _T('\n');
 209         m_out.Write(s.c_str(), s.length());
 210         m_textOut->Clear();
 211
 212         DoGet();
 213     }
 214
 215     void DoGet();
 216     void DoClose();
 217
 218 private:
 219     void DoGetFromStream(wxTextCtrl *text, wxInputStream& in);
 220     void DisableInput();
 221     void DisableOutput();
 222
 223
 224     wxProcess *m_process;
 225
 226     wxOutputStream &m_out;
 227     wxInputStream &m_in,
 228                   &m_err;
 229
 230     wxTextCtrl *m_textOut,
 231                *m_textIn,
 232                *m_textErr;
 233
 234     DECLARE_EVENT_TABLE()
 235 };
 236
 237 // ----------------------------------------------------------------------------
 238 // wxProcess-derived classes
 239 // ----------------------------------------------------------------------------
 240
 241 // This is the handler for process termination events
 242 class MyProcess : public wxProcess
 243 {
 244 public:
 245     MyProcess(MyFrame *parent, const wxString& cmd)
 246         : wxProcess(parent), m_cmd(cmd)
 247     {
 248         m_parent = parent;
 249     }
 250
 251     // instead of overriding this virtual function we might as well process the
 252     // event from it in the frame class - this might be more convenient in some
 253     // cases
 254     virtual void OnTerminate(int pid, int status);
 255
 256 protected:
 257     MyFrame *m_parent;
 258     wxString m_cmd;
 259 };
 260
 261 // A specialization of MyProcess for redirecting the output
 262 class MyPipedProcess : public MyProcess
 263 {
 264 public:
 265     MyPipedProcess(MyFrame *parent, const wxString& cmd)
 266         : MyProcess(parent, cmd)
 267         {
 268             Redirect();
 269         }
 270
 271     virtual void OnTerminate(int pid, int status);
 272
 273     virtual bool HasInput();
 274 };
 275
 276 // A version of MyPipedProcess which also sends input to the stdin of the
 277 // child process
 278 class MyPipedProcess2 : public MyPipedProcess
 279 {
 280 public:
 281     MyPipedProcess2(MyFrame *parent, const wxString& cmd, const wxString& input)
 282         : MyPipedProcess(parent, cmd), m_input(input)
 283         {
 284         }
 285
 286     virtual bool HasInput();
 287
 288 private:
 289     wxString m_input;
 290 };
 291
 292 // ----------------------------------------------------------------------------
 293 // constants
 294 // ----------------------------------------------------------------------------
 295
 296 // IDs for the controls and the menu commands
 297 enum
 298 {
 299     // menu items
 300     Exec_Quit = 100,
 301     Exec_Kill,
 302     Exec_ClearLog,
 303     Exec_SyncExec = 200,
 304     Exec_SyncNoEventsExec,
 305     Exec_AsyncExec,
 306     Exec_Shell,
 307     Exec_POpen,
 308     Exec_OpenFile,
 309     Exec_OpenURL,
 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_SyncNoEventsExec, MyFrame::OnSyncNoEventsExec)
 339     EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
 340     EVT_MENU(Exec_Shell, MyFrame::OnShell)
 341     EVT_MENU(Exec_Redirect, MyFrame::OnExecWithRedirect)
 342     EVT_MENU(Exec_Pipe, MyFrame::OnExecWithPipe)
 343
 344     EVT_MENU(Exec_POpen, MyFrame::OnPOpen)
 345
 346     EVT_MENU(Exec_OpenFile, MyFrame::OnFileExec)
 347     EVT_MENU(Exec_OpenURL, MyFrame::OnOpenURL)
 348
 349 #ifdef __WINDOWS__
 350     EVT_MENU(Exec_DDEExec, MyFrame::OnDDEExec)
 351     EVT_MENU(Exec_DDERequest, MyFrame::OnDDERequest)
 352 #endif // __WINDOWS__
 353
 354     EVT_MENU(Exec_About, MyFrame::OnAbout)
 355
 356     EVT_IDLE(MyFrame::OnIdle)
 357
 358     EVT_TIMER(wxID_ANY, MyFrame::OnTimer)
 359 END_EVENT_TABLE()
 360
 361 BEGIN_EVENT_TABLE(MyPipeFrame, wxFrame)
 362     EVT_BUTTON(Exec_Btn_Send, MyPipeFrame::OnBtnSend)
 363     EVT_BUTTON(Exec_Btn_SendFile, MyPipeFrame::OnBtnSendFile)
 364     EVT_BUTTON(Exec_Btn_Get, MyPipeFrame::OnBtnGet)
 365     EVT_BUTTON(Exec_Btn_Close, MyPipeFrame::OnBtnClose)
 366
 367     EVT_TEXT_ENTER(wxID_ANY, MyPipeFrame::OnTextEnter)
 368
 369     EVT_CLOSE(MyPipeFrame::OnClose)
 370
 371     EVT_END_PROCESS(wxID_ANY, MyPipeFrame::OnProcessTerm)
 372 END_EVENT_TABLE()
 373
 374 // Create a new application object: this macro will allow wxWidgets to create
 375 // the application object during program execution (it's better than using a
 376 // static object for many reasons) and also declares the accessor function
 377 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 378 // not wxApp)
 379 IMPLEMENT_APP(MyApp)
 380
 381 // ============================================================================
 382 // implementation
 383 // ============================================================================
 384
 385 // ----------------------------------------------------------------------------
 386 // the application class
 387 // ----------------------------------------------------------------------------
 388
 389 // `Main program' equivalent: the program execution "starts" here
 390 bool MyApp::OnInit()
 391 {
 392     if ( !wxApp::OnInit() )
 393         return false;
 394
 395     // Create the main application window
 396     MyFrame *frame = new MyFrame(_T("Exec wxWidgets sample"),
 397                                  wxDefaultPosition, wxSize(500, 140));
 398
 399     // Show it and tell the application that it's our main window
 400     frame->Show(true);
 401     SetTopWindow(frame);
 402
 403     // success: wxApp::OnRun() will be called which will enter the main message
 404     // loop and the application will run. If we returned false here, the
 405     // application would exit immediately.
 406     return true;
 407 }
 408
 409 // ----------------------------------------------------------------------------
 410 // main frame
 411 // ----------------------------------------------------------------------------
 412
 413 #ifdef __VISUALC__
 414 #pragma warning(disable: 4355) // this used in base member initializer list
 415 #endif
 416
 417 // frame constructor
 418 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 419        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size),
 420          m_timerIdleWakeUp(this)
 421 {
 422     m_pidLast = 0;
 423
 424 #ifdef __WXMAC__
 425     // we need this in order to allow the about menu relocation, since ABOUT is
 426     // not the default id of the about menu
 427     wxApp::s_macAboutMenuItemId = Exec_About;
 428 #endif
 429
 430     // create a menu bar
 431     wxMenu *menuFile = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 432     menuFile->Append(Exec_Kill, _T("&Kill process...\tCtrl-K"),
 433                      _T("Kill a process by PID"));
 434     menuFile->AppendSeparator();
 435     menuFile->Append(Exec_ClearLog, _T("&Clear log\tCtrl-C"),
 436                      _T("Clear the log window"));
 437     menuFile->AppendSeparator();
 438     menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 439
 440     wxMenu *execMenu = new wxMenu;
 441     execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
 442                      _T("Launch a program and return when it terminates"));
 443     execMenu->Append(Exec_SyncNoEventsExec, _T("Sync execution and &block...\tCtrl-B"),
 444                      _T("Launch a program and block until it terminates"));
 445     execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
 446                      _T("Launch a program and return immediately"));
 447     execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
 448                      _T("Launch a shell and execute a command in it"));
 449     execMenu->AppendSeparator();
 450     execMenu->Append(Exec_Redirect, _T("Capture command &output...\tCtrl-O"),
 451                      _T("Launch a program and capture its output"));
 452     execMenu->Append(Exec_Pipe, _T("&Pipe through command..."),
 453                      _T("Pipe a string through a filter"));
 454     execMenu->Append(Exec_POpen, _T("&Open a pipe to a command...\tCtrl-P"),
 455                      _T("Open a pipe to and from another program"));
 456
 457     execMenu->AppendSeparator();
 458     execMenu->Append(Exec_OpenFile, _T("Open &file...\tCtrl-F"),
 459                      _T("Launch the command to open this kind of files"));
 460     execMenu->Append(Exec_OpenURL, _T("Open &URL...\tCtrl-U"),
 461                      _T("Launch the default browser with the given URL"));
 462 #ifdef __WINDOWS__
 463     execMenu->AppendSeparator();
 464     execMenu->Append(Exec_DDEExec, _T("Execute command via &DDE...\tCtrl-D"));
 465     execMenu->Append(Exec_DDERequest, _T("Send DDE &request...\tCtrl-R"));
 466 #endif
 467
 468     wxMenu *helpMenu = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 469     helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
 470
 471     // now append the freshly created menu to the menu bar...
 472     wxMenuBar *menuBar = new wxMenuBar();
 473     menuBar->Append(menuFile, _T("&File"));
 474     menuBar->Append(execMenu, _T("&Exec"));
 475     menuBar->Append(helpMenu, _T("&Help"));
 476
 477     // ... and attach this menu bar to the frame
 478     SetMenuBar(menuBar);
 479
 480     // create the listbox in which we will show misc messages as they come
 481     m_lbox = new wxListBox(this, wxID_ANY);
 482     wxFont font(12, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL,
 483                 wxFONTWEIGHT_NORMAL);
 484     if ( font.Ok() )
 485         m_lbox->SetFont(font);
 486
 487 #if wxUSE_STATUSBAR
 488     // create a status bar just for fun (by default with 1 pane only)
 489     CreateStatusBar();
 490     SetStatusText(_T("Welcome to wxWidgets exec sample!"));
 491 #endif // wxUSE_STATUSBAR
 492 }
 493
 494 // ----------------------------------------------------------------------------
 495 // event handlers: file and help menu
 496 // ----------------------------------------------------------------------------
 497
 498 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 499 {
 500     // true is to force the frame to close
 501     Close(true);
 502 }
 503
 504 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 505 {
 506     m_lbox->Clear();
 507 }
 508
 509 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 510 {
 511     wxMessageBox(_T("Exec wxWidgets Sample\n(c) 2000-2002 Vadim Zeitlin"),
 512                  _T("About Exec"), wxOK | wxICON_INFORMATION, this);
 513 }
 514
 515 void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
 516 {
 517     long pid = wxGetNumberFromUser(_T("Please specify the process to kill"),
 518                                    _T("Enter PID:"),
 519                                    _T("Exec question"),
 520                                    m_pidLast,
 521                                    // we need the full unsigned int range
 522                                    -INT_MAX, INT_MAX,
 523                                    this);
 524     if ( pid == -1 )
 525     {
 526         // cancelled
 527         return;
 528     }
 529
 530     static const wxString signalNames[] =
 531     {
 532         _T("Just test (SIGNONE)"),
 533         _T("Hangup (SIGHUP)"),
 534         _T("Interrupt (SIGINT)"),
 535         _T("Quit (SIGQUIT)"),
 536         _T("Illegal instruction (SIGILL)"),
 537         _T("Trap (SIGTRAP)"),
 538         _T("Abort (SIGABRT)"),
 539         _T("Emulated trap (SIGEMT)"),
 540         _T("FP exception (SIGFPE)"),
 541         _T("Kill (SIGKILL)"),
 542         _T("Bus (SIGBUS)"),
 543         _T("Segment violation (SIGSEGV)"),
 544         _T("System (SIGSYS)"),
 545         _T("Broken pipe (SIGPIPE)"),
 546         _T("Alarm (SIGALRM)"),
 547         _T("Terminate (SIGTERM)"),
 548     };
 549
 550     int sig = wxGetSingleChoiceIndex(_T("How to kill the process?"),
 551                                      _T("Exec question"),
 552                                      WXSIZEOF(signalNames), signalNames,
 553                                      this);
 554     switch ( sig )
 555     {
 556         default:
 557             wxFAIL_MSG( _T("unexpected return value") );
 558             // fall through
 559
 560         case -1:
 561             // cancelled
 562             return;
 563
 564         case wxSIGNONE:
 565         case wxSIGHUP:
 566         case wxSIGINT:
 567         case wxSIGQUIT:
 568         case wxSIGILL:
 569         case wxSIGTRAP:
 570         case wxSIGABRT:
 571         case wxSIGEMT:
 572         case wxSIGFPE:
 573         case wxSIGKILL:
 574         case wxSIGBUS:
 575         case wxSIGSEGV:
 576         case wxSIGSYS:
 577         case wxSIGPIPE:
 578         case wxSIGALRM:
 579         case wxSIGTERM:
 580             break;
 581     }
 582
 583     if ( sig == 0 )
 584     {
 585         if ( wxProcess::Exists(pid) )
 586             wxLogStatus(_T("Process %ld is running."), pid);
 587         else
 588             wxLogStatus(_T("No process with pid = %ld."), pid);
 589     }
 590     else // not SIGNONE
 591     {
 592         wxKillError rc = wxProcess::Kill(pid, (wxSignal)sig);
 593         if ( rc == wxKILL_OK )
 594         {
 595             wxLogStatus(_T("Process %ld killed with signal %d."), pid, sig);
 596         }
 597         else
 598         {
 599             static const wxChar *errorText[] =
 600             {
 601                 _T(""), // no error
 602                 _T("signal not supported"),
 603                 _T("permission denied"),
 604                 _T("no such process"),
 605                 _T("unspecified error"),
 606             };
 607
 608             wxLogStatus(_T("Failed to kill process %ld with signal %d: %s"),
 609                         pid, sig, errorText[rc]);
 610         }
 611     }
 612 }
 613
 614 // ----------------------------------------------------------------------------
 615 // event handlers: exec menu
 616 // ----------------------------------------------------------------------------
 617
 618 void MyFrame::DoAsyncExec(const wxString& cmd)
 619 {
 620     wxProcess *process = new MyProcess(this, cmd);
 621     m_pidLast = wxExecute(cmd, wxEXEC_ASYNC, process);
 622     if ( !m_pidLast )
 623     {
 624         wxLogError( _T("Execution of '%s' failed."), cmd.c_str() );
 625
 626         delete process;
 627     }
 628     else
 629     {
 630         wxLogStatus( _T("Process %ld (%s) launched."),
 631             m_pidLast, cmd.c_str() );
 632
 633         m_cmdLast = cmd;
 634     }
 635 }
 636
 637 void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
 638 {
 639     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 640                                      DIALOG_TITLE,
 641                                      m_cmdLast);
 642
 643     if ( !cmd )
 644         return;
 645
 646     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 647
 648     int code = wxExecute(cmd, wxEXEC_SYNC);
 649
 650     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 651         cmd.c_str(), code);
 652
 653     m_cmdLast = cmd;
 654 }
 655
 656 void MyFrame::OnSyncNoEventsExec(wxCommandEvent& WXUNUSED(event))
 657 {
 658     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 659                                      DIALOG_TITLE,
 660                                      m_cmdLast);
 661
 662     if ( !cmd )
 663         return;
 664
 665     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 666
 667     int code = wxExecute(cmd, wxEXEC_BLOCK);
 668
 669     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 670         cmd.c_str(), code);
 671
 672     m_cmdLast = cmd;
 673 }
 674
 675 void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
 676 {
 677     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 678                                      DIALOG_TITLE,
 679                                      m_cmdLast);
 680
 681     if ( !cmd )
 682         return;
 683
 684     DoAsyncExec(cmd);
 685 }
 686
 687 void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
 688 {
 689     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 690                                      DIALOG_TITLE,
 691                                      m_cmdLast);
 692
 693     if ( !cmd )
 694         return;
 695
 696     int code = wxShell(cmd);
 697     wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
 698                 cmd.c_str(), code);
 699     m_cmdLast = cmd;
 700 }
 701
 702 void MyFrame::OnExecWithRedirect(wxCommandEvent& WXUNUSED(event))
 703 {
 704     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 705                                      DIALOG_TITLE,
 706                                      m_cmdLast);
 707
 708     if ( !cmd )
 709         return;
 710
 711     bool sync;
 712     switch ( wxMessageBox(_T("Execute it synchronously?"),
 713                           _T("Exec question"),
 714                           wxYES_NO | wxCANCEL | wxICON_QUESTION, this) )
 715     {
 716         case wxYES:
 717             sync = true;
 718             break;
 719
 720         case wxNO:
 721             sync = false;
 722             break;
 723
 724         default:
 725             return;
 726     }
 727
 728     if ( sync )
 729     {
 730         wxArrayString output, errors;
 731         int code = wxExecute(cmd, output, errors);
 732         wxLogStatus(_T("command '%s' terminated with exit code %d."),
 733                     cmd.c_str(), code);
 734
 735         if ( code != -1 )
 736         {
 737             ShowOutput(cmd, output, _T("Output"));
 738             ShowOutput(cmd, errors, _T("Errors"));
 739         }
 740     }
 741     else // async exec
 742     {
 743         MyPipedProcess *process = new MyPipedProcess(this, cmd);
 744         if ( !wxExecute(cmd, wxEXEC_ASYNC, process) )
 745         {
 746             wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 747
 748             delete process;
 749         }
 750         else
 751         {
 752             AddAsyncProcess(process);
 753         }
 754     }
 755
 756     m_cmdLast = cmd;
 757 }
 758
 759 void MyFrame::OnExecWithPipe(wxCommandEvent& WXUNUSED(event))
 760 {
 761     if ( !m_cmdLast )
 762         m_cmdLast = _T("tr [a-z] [A-Z]");
 763
 764     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 765                                      DIALOG_TITLE,
 766                                      m_cmdLast);
 767
 768     if ( !cmd )
 769         return;
 770
 771     wxString input = wxGetTextFromUser(_T("Enter the string to send to it: "),
 772                                        DIALOG_TITLE);
 773     if ( !input )
 774         return;
 775
 776     // always execute the filter asynchronously
 777     MyPipedProcess2 *process = new MyPipedProcess2(this, cmd, input);
 778     long pid = wxExecute(cmd, wxEXEC_ASYNC, process);
 779     if ( pid )
 780     {
 781         wxLogStatus( _T("Process %ld (%s) launched."), pid, cmd.c_str() );
 782
 783         AddAsyncProcess(process);
 784     }
 785     else
 786     {
 787         wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 788
 789         delete process;
 790     }
 791
 792     m_cmdLast = cmd;
 793 }
 794
 795 void MyFrame::OnPOpen(wxCommandEvent& WXUNUSED(event))
 796 {
 797     wxString cmd = wxGetTextFromUser(_T("Enter the command to launch: "),
 798                                      DIALOG_TITLE,
 799                                      m_cmdLast);
 800     if ( cmd.empty() )
 801         return;
 802
 803     wxProcess *process = wxProcess::Open(cmd);
 804     if ( !process )
 805     {
 806         wxLogError(_T("Failed to launch the command."));
 807         return;
 808     }
 809
 810     wxLogVerbose(_T("PID of the new process: %ld"), process->GetPid());
 811
 812     wxOutputStream *out = process->GetOutputStream();
 813     if ( !out )
 814     {
 815         wxLogError(_T("Failed to connect to child stdin"));
 816         return;
 817     }
 818
 819     wxInputStream *in = process->GetInputStream();
 820     if ( !in )
 821     {
 822         wxLogError(_T("Failed to connect to child stdout"));
 823         return;
 824     }
 825
 826     new MyPipeFrame(this, cmd, process);
 827 }
 828
 829 void MyFrame::OnFileExec(wxCommandEvent& WXUNUSED(event))
 830 {
 831     static wxString s_filename;
 832
 833     wxString filename;
 834
 835 #if wxUSE_FILEDLG
 836     filename = wxLoadFileSelector(_T("any file"), NULL, s_filename, this);
 837 #else // !wxUSE_FILEDLG
 838     filename = wxGetTextFromUser(_T("Enter the file name"), _T("exec sample"),
 839                                  s_filename, this);
 840 #endif // wxUSE_FILEDLG/!wxUSE_FILEDLG
 841
 842     if ( filename.empty() )
 843         return;
 844
 845     s_filename = filename;
 846
 847     wxString ext = filename.AfterFirst(_T('.'));
 848     wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
 849     if ( !ft )
 850     {
 851         wxLogError(_T("Impossible to determine the file type for extension '%s'"),
 852                    ext.c_str());
 853         return;
 854     }
 855
 856     wxString cmd;
 857     bool ok = ft->GetOpenCommand(&cmd,
 858                                  wxFileType::MessageParameters(filename));
 859     delete ft;
 860     if ( !ok )
 861     {
 862         wxLogError(_T("Impossible to find out how to open files of extension '%s'"),
 863                    ext.c_str());
 864         return;
 865     }
 866
 867     DoAsyncExec(cmd);
 868 }
 869
 870 void MyFrame::OnOpenURL(wxCommandEvent& WXUNUSED(event))
 871 {
 872     static wxString s_filename(_T("http://www.wxwidgets.org/"));
 873
 874     wxString filename = wxGetTextFromUser
 875                         (
 876                             _T("Enter the URL"),
 877                             _T("exec sample"),
 878                             s_filename,
 879                             this
 880                         );
 881
 882     if ( filename.empty() )
 883         return;
 884
 885     s_filename = filename;
 886
 887     if ( !wxLaunchDefaultBrowser(s_filename) )
 888         wxLogError(_T("Failed to open URL \"%s\""), s_filename.c_str());
 889 }
 890
 891 // ----------------------------------------------------------------------------
 892 // DDE stuff
 893 // ----------------------------------------------------------------------------
 894
 895 #ifdef __WINDOWS__
 896
 897 bool MyFrame::GetDDEServer()
 898 {
 899     wxString server = wxGetTextFromUser(_T("Server to connect to:"),
 900                                         DIALOG_TITLE, m_server);
 901     if ( !server )
 902         return false;
 903
 904     m_server = server;
 905
 906     wxString topic = wxGetTextFromUser(_T("DDE topic:"), DIALOG_TITLE, m_topic);
 907     if ( !topic )
 908         return false;
 909
 910     m_topic = topic;
 911
 912     wxString cmd = wxGetTextFromUser(_T("DDE command:"), DIALOG_TITLE, m_cmdDde);
 913     if ( !cmd )
 914         return false;
 915
 916     m_cmdDde = cmd;
 917
 918     return true;
 919 }
 920
 921 void MyFrame::OnDDEExec(wxCommandEvent& WXUNUSED(event))
 922 {
 923     if ( !GetDDEServer() )
 924         return;
 925
 926     wxDDEClient client;
 927     wxConnectionBase *conn = client.MakeConnection(wxEmptyString, m_server, m_topic);
 928     if ( !conn )
 929     {
 930         wxLogError(_T("Failed to connect to the DDE server '%s'."),
 931                    m_server.c_str());
 932     }
 933     else
 934     {
 935         if ( !conn->Execute(m_cmdDde) )
 936         {
 937             wxLogError(_T("Failed to execute command '%s' via DDE."),
 938                        m_cmdDde.c_str());
 939         }
 940         else
 941         {
 942             wxLogStatus(_T("Successfully executed DDE command"));
 943         }
 944     }
 945 }
 946
 947 void MyFrame::OnDDERequest(wxCommandEvent& WXUNUSED(event))
 948 {
 949     if ( !GetDDEServer() )
 950         return;
 951
 952     wxDDEClient client;
 953     wxConnectionBase *conn = client.MakeConnection(wxEmptyString, m_server, m_topic);
 954     if ( !conn )
 955     {
 956         wxLogError(_T("Failed to connect to the DDE server '%s'."),
 957                    m_server.c_str());
 958     }
 959     else
 960     {
 961         if ( !conn->Request(m_cmdDde) )
 962         {
 963             wxLogError(_T("Failed to  send request '%s' via DDE."),
 964                        m_cmdDde.c_str());
 965         }
 966         else
 967         {
 968             wxLogStatus(_T("Successfully sent DDE request."));
 969         }
 970     }
 971 }
 972
 973 #endif // __WINDOWS__
 974
 975 // ----------------------------------------------------------------------------
 976 // various helpers
 977 // ----------------------------------------------------------------------------
 978
 979 // input polling
 980 void MyFrame::OnIdle(wxIdleEvent& event)
 981 {
 982     size_t count = m_running.GetCount();
 983     for ( size_t n = 0; n < count; n++ )
 984     {
 985         if ( m_running[n]->HasInput() )
 986         {
 987             event.RequestMore();
 988         }
 989     }
 990 }
 991
 992 void MyFrame::OnTimer(wxTimerEvent& WXUNUSED(event))
 993 {
 994     wxWakeUpIdle();
 995 }
 996
 997 void MyFrame::OnProcessTerminated(MyPipedProcess *process)
 998 {
 999     RemoveAsyncProcess(process);
1000 }
1001
1002
1003 void MyFrame::ShowOutput(const wxString& cmd,
1004                          const wxArrayString& output,
1005                          const wxString& title)
1006 {
1007     size_t count = output.GetCount();
1008     if ( !count )
1009         return;
1010
1011     m_lbox->Append(wxString::Format(_T("--- %s of '%s' ---"),
1012                                     title.c_str(), cmd.c_str()));
1013
1014     for ( size_t n = 0; n < count; n++ )
1015     {
1016         m_lbox->Append(output[n]);
1017     }
1018
1019     m_lbox->Append(wxString::Format(_T("--- End of %s ---"),
1020                                     title.Lower().c_str()));
1021 }
1022
1023 // ----------------------------------------------------------------------------
1024 // MyProcess
1025 // ----------------------------------------------------------------------------
1026
1027 void MyProcess::OnTerminate(int pid, int status)
1028 {
1029     wxLogStatus(m_parent, _T("Process %u ('%s') terminated with exit code %d."),
1030                 pid, m_cmd.c_str(), status);
1031
1032     // we're not needed any more
1033     delete this;
1034 }
1035
1036 // ----------------------------------------------------------------------------
1037 // MyPipedProcess
1038 // ----------------------------------------------------------------------------
1039
1040 bool MyPipedProcess::HasInput()
1041 {
1042     bool hasInput = false;
1043
1044     if ( IsInputAvailable() )
1045     {
1046         wxTextInputStream tis(*GetInputStream());
1047
1048         // this assumes that the output is always line buffered
1049         wxString msg;
1050         msg << m_cmd << _T(" (stdout): ") << tis.ReadLine();
1051
1052         m_parent->GetLogListBox()->Append(msg);
1053
1054         hasInput = true;
1055     }
1056
1057     if ( IsErrorAvailable() )
1058     {
1059         wxTextInputStream tis(*GetErrorStream());
1060
1061         // this assumes that the output is always line buffered
1062         wxString msg;
1063         msg << m_cmd << _T(" (stderr): ") << tis.ReadLine();
1064
1065         m_parent->GetLogListBox()->Append(msg);
1066
1067         hasInput = true;
1068     }
1069
1070     return hasInput;
1071 }
1072
1073 void MyPipedProcess::OnTerminate(int pid, int status)
1074 {
1075     // show the rest of the output
1076     while ( HasInput() )
1077         ;
1078
1079     m_parent->OnProcessTerminated(this);
1080
1081     MyProcess::OnTerminate(pid, status);
1082 }
1083
1084 // ----------------------------------------------------------------------------
1085 // MyPipedProcess2
1086 // ----------------------------------------------------------------------------
1087
1088 bool MyPipedProcess2::HasInput()
1089 {
1090     if ( !m_input.empty() )
1091     {
1092         wxTextOutputStream os(*GetOutputStream());
1093         os.WriteString(m_input);
1094
1095         CloseOutput();
1096         m_input.clear();
1097
1098         // call us once again - may be we'll have output
1099         return true;
1100     }
1101
1102     return MyPipedProcess::HasInput();
1103 }
1104
1105 // ============================================================================
1106 // MyPipeFrame implementation
1107 // ============================================================================
1108
1109 MyPipeFrame::MyPipeFrame(wxFrame *parent,
1110                          const wxString& cmd,
1111                          wxProcess *process)
1112            : wxFrame(parent, wxID_ANY, cmd),
1113              m_process(process),
1114              // in a real program we'd check that the streams are !NULL here
1115              m_out(*process->GetOutputStream()),
1116              m_in(*process->GetInputStream()),
1117              m_err(*process->GetErrorStream())
1118 {
1119     m_process->SetNextHandler(this);
1120
1121     wxPanel *panel = new wxPanel(this, wxID_ANY);
1122
1123     m_textOut = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1124                               wxDefaultPosition, wxDefaultSize,
1125                               wxTE_PROCESS_ENTER);
1126     m_textIn = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1127                                wxDefaultPosition, wxDefaultSize,
1128                                wxTE_MULTILINE | wxTE_RICH);
1129     m_textIn->SetEditable(false);
1130     m_textErr = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1131                                wxDefaultPosition, wxDefaultSize,
1132                                wxTE_MULTILINE | wxTE_RICH);
1133     m_textErr->SetEditable(false);
1134
1135     wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
1136     sizerTop->Add(m_textOut, 0, wxGROW | wxALL, 5);
1137
1138     wxSizer *sizerBtns = new wxBoxSizer(wxHORIZONTAL);
1139     sizerBtns->
1140         Add(new wxButton(panel, Exec_Btn_Send, _T("&Send")), 0, wxALL, 5);
1141     sizerBtns->
1142         Add(new wxButton(panel, Exec_Btn_SendFile, _T("&File...")), 0, wxALL, 5);
1143     sizerBtns->
1144         Add(new wxButton(panel, Exec_Btn_Get, _T("&Get")), 0, wxALL, 5);
1145     sizerBtns->
1146         Add(new wxButton(panel, Exec_Btn_Close, _T("&Close")), 0, wxALL, 5);
1147
1148     sizerTop->Add(sizerBtns, 0, wxCENTRE | wxALL, 5);
1149     sizerTop->Add(m_textIn, 1, wxGROW | wxALL, 5);
1150     sizerTop->Add(m_textErr, 1, wxGROW | wxALL, 5);
1151
1152     panel->SetSizer(sizerTop);
1153     sizerTop->Fit(this);
1154
1155     Show();
1156 }
1157
1158 void MyPipeFrame::OnBtnSendFile(wxCommandEvent& WXUNUSED(event))
1159 {
1160 #if wxUSE_FILEDLG
1161     wxFileDialog filedlg(this, _T("Select file to send"));
1162     if ( filedlg.ShowModal() != wxID_OK )
1163         return;
1164
1165     wxFFile file(filedlg.GetFilename(), _T("r"));
1166     wxString data;
1167     if ( !file.IsOpened() || !file.ReadAll(&data) )
1168         return;
1169
1170     // can't write the entire string at once, this risk overflowing the pipe
1171     // and we would dead lock
1172     size_t len = data.length();
1173     const wxChar *pc = data.c_str();
1174     while ( len )
1175     {
1176         const size_t CHUNK_SIZE = 4096;
1177         m_out.Write(pc, len > CHUNK_SIZE ? CHUNK_SIZE : len);
1178
1179         // note that not all data could have been written as we don't block on
1180         // the write end of the pipe
1181         const size_t lenChunk = m_out.LastWrite();
1182
1183         pc += lenChunk;
1184         len -= lenChunk;
1185
1186         DoGet();
1187     }
1188 #endif // wxUSE_FILEDLG
1189 }
1190
1191 void MyPipeFrame::DoGet()
1192 {
1193     // we don't have any way to be notified when any input appears on the
1194     // stream so we have to poll it :-(
1195     DoGetFromStream(m_textIn, m_in);
1196     DoGetFromStream(m_textErr, m_err);
1197 }
1198
1199 void MyPipeFrame::DoGetFromStream(wxTextCtrl *text, wxInputStream& in)
1200 {
1201     while ( in.CanRead() )
1202     {
1203         wxChar buffer[4096];
1204         buffer[in.Read(buffer, WXSIZEOF(buffer) - 1).LastRead()] = _T('\0');
1205
1206         text->AppendText(buffer);
1207     }
1208 }
1209
1210 void MyPipeFrame::DoClose()
1211 {
1212     m_process->CloseOutput();
1213
1214     DisableInput();
1215 }
1216
1217 void MyPipeFrame::DisableInput()
1218 {
1219     m_textOut->SetEditable(false);
1220     FindWindow(Exec_Btn_Send)->Disable();
1221     FindWindow(Exec_Btn_SendFile)->Disable();
1222     FindWindow(Exec_Btn_Close)->Disable();
1223 }
1224
1225 void MyPipeFrame::DisableOutput()
1226 {
1227     FindWindow(Exec_Btn_Get)->Disable();
1228 }
1229
1230 void MyPipeFrame::OnClose(wxCloseEvent& event)
1231 {
1232     if ( m_process )
1233     {
1234         // we're not interested in getting the process termination notification
1235         // if we are closing it ourselves
1236         wxProcess *process = m_process;
1237         m_process = NULL;
1238         process->SetNextHandler(NULL);
1239
1240         process->CloseOutput();
1241     }
1242
1243     event.Skip();
1244 }
1245
1246 void MyPipeFrame::OnProcessTerm(wxProcessEvent& WXUNUSED(event))
1247 {
1248     DoGet();
1249
1250     delete m_process;
1251     m_process = NULL;
1252
1253     wxLogWarning(_T("The other process has terminated, closing"));
1254
1255     DisableInput();
1256     DisableOutput();
1257 }