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/ffile.h"
  55
  56 #include "wx/process.h"
  57
  58 #include "wx/mimetype.h"
  59
  60 #ifdef __WINDOWS__
  61     #include "wx/dde.h"
  62 #endif // __WINDOWS__
  63
  64 // ----------------------------------------------------------------------------
  65 // the usual application and main frame classes
  66 // ----------------------------------------------------------------------------
  67
  68 // Define a new application type, each program should derive a class from wxApp
  69 class MyApp : public wxApp
  70 {
  71 public:
  72     // override base class virtuals
  73     // ----------------------------
  74
  75     // this one is called on application startup and is a good place for the app
  76     // initialization (doing it here and not in the ctor allows to have an error
  77     // return: if OnInit() returns false, the application terminates)
  78     virtual bool OnInit();
  79 };
  80
  81 // Define an array of process pointers used by MyFrame
  82 class MyPipedProcess;
  83 WX_DEFINE_ARRAY_PTR(MyPipedProcess *, MyProcessesArray);
  84
  85 // Define a new frame type: this is going to be our main frame
  86 class MyFrame : public wxFrame
  87 {
  88 public:
  89     // ctor(s)
  90     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  91
  92     // event handlers (these functions should _not_ be virtual)
  93     void OnQuit(wxCommandEvent& event);
  94
  95     void OnKill(wxCommandEvent& event);
  96
  97     void OnClear(wxCommandEvent& event);
  98
  99     void OnSyncExec(wxCommandEvent& event);
 100     void OnAsyncExec(wxCommandEvent& event);
 101     void OnShell(wxCommandEvent& event);
 102     void OnExecWithRedirect(wxCommandEvent& event);
 103     void OnExecWithPipe(wxCommandEvent& event);
 104
 105     void OnPOpen(wxCommandEvent& event);
 106
 107     void OnFileExec(wxCommandEvent& event);
 108
 109     void OnAbout(wxCommandEvent& event);
 110
 111     // polling output of async processes
 112     void OnTimer(wxTimerEvent& event);
 113     void OnIdle(wxIdleEvent& event);
 114
 115     // for MyPipedProcess
 116     void OnProcessTerminated(MyPipedProcess *process);
 117     wxListBox *GetLogListBox() const { return m_lbox; }
 118
 119 private:
 120     void ShowOutput(const wxString& cmd,
 121                     const wxArrayString& output,
 122                     const wxString& title);
 123
 124     void DoAsyncExec(const wxString& cmd);
 125
 126     void AddAsyncProcess(MyPipedProcess *process)
 127     {
 128         if ( m_running.IsEmpty() )
 129         {
 130             // we want to start getting the timer events to ensure that a
 131             // steady stream of idle events comes in -- otherwise we
 132             // wouldn't be able to poll the child process input
 133             m_timerIdleWakeUp.Start(100);
 134         }
 135         //else: the timer is already running
 136
 137         m_running.Add(process);
 138     }
 139
 140     void RemoveAsyncProcess(MyPipedProcess *process)
 141     {
 142         m_running.Remove(process);
 143
 144         if ( m_running.IsEmpty() )
 145         {
 146             // we don't need to get idle events all the time any more
 147             m_timerIdleWakeUp.Stop();
 148         }
 149     }
 150
 151     // the PID of the last process we launched asynchronously
 152     long m_pidLast;
 153
 154     // last command we executed
 155     wxString m_cmdLast;
 156
 157 #ifdef __WINDOWS__
 158     void OnDDEExec(wxCommandEvent& event);
 159     void OnDDERequest(wxCommandEvent& event);
 160
 161     bool GetDDEServer();
 162
 163     // last params of a DDE transaction
 164     wxString m_server,
 165              m_topic,
 166              m_cmdDde;
 167 #endif // __WINDOWS__
 168
 169     wxListBox *m_lbox;
 170
 171     MyProcessesArray m_running;
 172
 173     // the idle event wake up timer
 174     wxTimer m_timerIdleWakeUp;
 175
 176     // any class wishing to process wxWidgets events must use this macro
 177     DECLARE_EVENT_TABLE()
 178 };
 179
 180 // ----------------------------------------------------------------------------
 181 // MyPipeFrame: allows the user to communicate with the child process
 182 // ----------------------------------------------------------------------------
 183
 184 class MyPipeFrame : public wxFrame
 185 {
 186 public:
 187     MyPipeFrame(wxFrame *parent,
 188                 const wxString& cmd,
 189                 wxProcess *process);
 190
 191 protected:
 192     void OnTextEnter(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 193     void OnBtnSend(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 194     void OnBtnSendFile(wxCommandEvent& WXUNUSED(event));
 195     void OnBtnGet(wxCommandEvent& WXUNUSED(event)) { DoGet(); }
 196     void OnBtnClose(wxCommandEvent& WXUNUSED(event)) { DoClose(); }
 197
 198     void OnClose(wxCloseEvent& event);
 199
 200     void OnProcessTerm(wxProcessEvent& event);
 201
 202     void DoSend()
 203     {
 204         wxString s(m_textOut->GetValue());
 205         s += _T('\n');
 206         m_out.Write(s.c_str(), s.length());
 207         m_textOut->Clear();
 208
 209         DoGet();
 210     }
 211
 212     void DoGet();
 213     void DoClose();
 214
 215 private:
 216     void DoGetFromStream(wxTextCtrl *text, wxInputStream& in);
 217     void DisableInput();
 218     void DisableOutput();
 219
 220
 221     wxProcess *m_process;
 222
 223     wxOutputStream &m_out;
 224     wxInputStream &m_in,
 225                   &m_err;
 226
 227     wxTextCtrl *m_textOut,
 228                *m_textIn,
 229                *m_textErr;
 230
 231     DECLARE_EVENT_TABLE()
 232 };
 233
 234 // ----------------------------------------------------------------------------
 235 // wxProcess-derived classes
 236 // ----------------------------------------------------------------------------
 237
 238 // This is the handler for process termination events
 239 class MyProcess : public wxProcess
 240 {
 241 public:
 242     MyProcess(MyFrame *parent, const wxString& cmd)
 243         : wxProcess(parent), m_cmd(cmd)
 244     {
 245         m_parent = parent;
 246     }
 247
 248     // instead of overriding this virtual function we might as well process the
 249     // event from it in the frame class - this might be more convenient in some
 250     // cases
 251     virtual void OnTerminate(int pid, int status);
 252
 253 protected:
 254     MyFrame *m_parent;
 255     wxString m_cmd;
 256 };
 257
 258 // A specialization of MyProcess for redirecting the output
 259 class MyPipedProcess : public MyProcess
 260 {
 261 public:
 262     MyPipedProcess(MyFrame *parent, const wxString& cmd)
 263         : MyProcess(parent, cmd)
 264         {
 265             Redirect();
 266         }
 267
 268     virtual void OnTerminate(int pid, int status);
 269
 270     virtual bool HasInput();
 271 };
 272
 273 // A version of MyPipedProcess which also sends input to the stdin of the
 274 // child process
 275 class MyPipedProcess2 : public MyPipedProcess
 276 {
 277 public:
 278     MyPipedProcess2(MyFrame *parent, const wxString& cmd, const wxString& input)
 279         : MyPipedProcess(parent, cmd), m_input(input)
 280         {
 281         }
 282
 283     virtual bool HasInput();
 284
 285 private:
 286     wxString m_input;
 287 };
 288
 289 // ----------------------------------------------------------------------------
 290 // constants
 291 // ----------------------------------------------------------------------------
 292
 293 // IDs for the controls and the menu commands
 294 enum
 295 {
 296     // menu items
 297     Exec_Quit = 100,
 298     Exec_Kill,
 299     Exec_ClearLog,
 300     Exec_SyncExec = 200,
 301     Exec_AsyncExec,
 302     Exec_Shell,
 303     Exec_POpen,
 304     Exec_OpenFile,
 305     Exec_DDEExec,
 306     Exec_DDERequest,
 307     Exec_Redirect,
 308     Exec_Pipe,
 309     Exec_About = 300,
 310
 311     // control ids
 312     Exec_Btn_Send = 1000,
 313     Exec_Btn_SendFile,
 314     Exec_Btn_Get,
 315     Exec_Btn_Close
 316 };
 317
 318 static const wxChar *DIALOG_TITLE = _T("Exec sample");
 319
 320 // ----------------------------------------------------------------------------
 321 // event tables and other macros for wxWidgets
 322 // ----------------------------------------------------------------------------
 323
 324 // the event tables connect the wxWidgets events with the functions (event
 325 // handlers) which process them. It can be also done at run-time, but for the
 326 // simple menu events like this the static method is much simpler.
 327 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 328     EVT_MENU(Exec_Quit,  MyFrame::OnQuit)
 329     EVT_MENU(Exec_Kill,  MyFrame::OnKill)
 330     EVT_MENU(Exec_ClearLog,  MyFrame::OnClear)
 331
 332     EVT_MENU(Exec_SyncExec, MyFrame::OnSyncExec)
 333     EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
 334     EVT_MENU(Exec_Shell, MyFrame::OnShell)
 335     EVT_MENU(Exec_Redirect, MyFrame::OnExecWithRedirect)
 336     EVT_MENU(Exec_Pipe, MyFrame::OnExecWithPipe)
 337
 338     EVT_MENU(Exec_POpen, MyFrame::OnPOpen)
 339
 340     EVT_MENU(Exec_OpenFile, MyFrame::OnFileExec)
 341
 342 #ifdef __WINDOWS__
 343     EVT_MENU(Exec_DDEExec, MyFrame::OnDDEExec)
 344     EVT_MENU(Exec_DDERequest, MyFrame::OnDDERequest)
 345 #endif // __WINDOWS__
 346
 347     EVT_MENU(Exec_About, MyFrame::OnAbout)
 348
 349     EVT_IDLE(MyFrame::OnIdle)
 350
 351     EVT_TIMER(wxID_ANY, MyFrame::OnTimer)
 352 END_EVENT_TABLE()
 353
 354 BEGIN_EVENT_TABLE(MyPipeFrame, wxFrame)
 355     EVT_BUTTON(Exec_Btn_Send, MyPipeFrame::OnBtnSend)
 356     EVT_BUTTON(Exec_Btn_SendFile, MyPipeFrame::OnBtnSendFile)
 357     EVT_BUTTON(Exec_Btn_Get, MyPipeFrame::OnBtnGet)
 358     EVT_BUTTON(Exec_Btn_Close, MyPipeFrame::OnBtnClose)
 359
 360     EVT_TEXT_ENTER(wxID_ANY, MyPipeFrame::OnTextEnter)
 361
 362     EVT_CLOSE(MyPipeFrame::OnClose)
 363
 364     EVT_END_PROCESS(wxID_ANY, MyPipeFrame::OnProcessTerm)
 365 END_EVENT_TABLE()
 366
 367 // Create a new application object: this macro will allow wxWidgets to create
 368 // the application object during program execution (it's better than using a
 369 // static object for many reasons) and also declares the accessor function
 370 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 371 // not wxApp)
 372 IMPLEMENT_APP(MyApp)
 373
 374 // ============================================================================
 375 // implementation
 376 // ============================================================================
 377
 378 // ----------------------------------------------------------------------------
 379 // the application class
 380 // ----------------------------------------------------------------------------
 381
 382 // `Main program' equivalent: the program execution "starts" here
 383 bool MyApp::OnInit()
 384 {
 385     // Create the main application window
 386     MyFrame *frame = new MyFrame(_T("Exec wxWidgets sample"),
 387                                  wxDefaultPosition, wxSize(500, 140));
 388
 389     // Show it and tell the application that it's our main window
 390     frame->Show(true);
 391     SetTopWindow(frame);
 392
 393     // success: wxApp::OnRun() will be called which will enter the main message
 394     // loop and the application will run. If we returned false here, the
 395     // application would exit immediately.
 396     return true;
 397 }
 398
 399 // ----------------------------------------------------------------------------
 400 // main frame
 401 // ----------------------------------------------------------------------------
 402
 403 #ifdef __VISUALC__
 404 #pragma warning(disable: 4355) // this used in base member initializer list
 405 #endif
 406
 407 // frame constructor
 408 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 409        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size),
 410          m_timerIdleWakeUp(this)
 411 {
 412     m_pidLast = 0;
 413
 414 #ifdef __WXMAC__
 415     // we need this in order to allow the about menu relocation, since ABOUT is
 416     // not the default id of the about menu
 417     wxApp::s_macAboutMenuItemId = Exec_About;
 418 #endif
 419
 420     // create a menu bar
 421     wxMenu *menuFile = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 422     menuFile->Append(Exec_Kill, _T("&Kill process...\tCtrl-K"),
 423                      _T("Kill a process by PID"));
 424     menuFile->AppendSeparator();
 425     menuFile->Append(Exec_ClearLog, _T("&Clear log\tCtrl-C"),
 426                      _T("Clear the log window"));
 427     menuFile->AppendSeparator();
 428     menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 429
 430     wxMenu *execMenu = new wxMenu;
 431     execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
 432                      _T("Launch a program and return when it terminates"));
 433     execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
 434                      _T("Launch a program and return immediately"));
 435     execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
 436                      _T("Launch a shell and execute a command in it"));
 437     execMenu->AppendSeparator();
 438     execMenu->Append(Exec_Redirect, _T("Capture command &output...\tCtrl-O"),
 439                      _T("Launch a program and capture its output"));
 440     execMenu->Append(Exec_Pipe, _T("&Pipe through command..."),
 441                      _T("Pipe a string through a filter"));
 442     execMenu->Append(Exec_POpen, _T("&Open a pipe to a command...\tCtrl-P"),
 443                      _T("Open a pipe to and from another program"));
 444
 445     execMenu->AppendSeparator();
 446     execMenu->Append(Exec_OpenFile, _T("Open &file...\tCtrl-F"),
 447                      _T("Launch the command to open this kind of files"));
 448 #ifdef __WINDOWS__
 449     execMenu->AppendSeparator();
 450     execMenu->Append(Exec_DDEExec, _T("Execute command via &DDE...\tCtrl-D"));
 451     execMenu->Append(Exec_DDERequest, _T("Send DDE &request...\tCtrl-R"));
 452 #endif
 453
 454     wxMenu *helpMenu = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 455     helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
 456
 457     // now append the freshly created menu to the menu bar...
 458     wxMenuBar *menuBar = new wxMenuBar();
 459     menuBar->Append(menuFile, _T("&File"));
 460     menuBar->Append(execMenu, _T("&Exec"));
 461     menuBar->Append(helpMenu, _T("&Help"));
 462
 463     // ... and attach this menu bar to the frame
 464     SetMenuBar(menuBar);
 465
 466     // create the listbox in which we will show misc messages as they come
 467     m_lbox = new wxListBox(this, wxID_ANY);
 468     wxFont font(12, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL,
 469                 wxFONTWEIGHT_NORMAL);
 470     if ( font.Ok() )
 471         m_lbox->SetFont(font);
 472
 473 #if wxUSE_STATUSBAR
 474     // create a status bar just for fun (by default with 1 pane only)
 475     CreateStatusBar();
 476     SetStatusText(_T("Welcome to wxWidgets exec sample!"));
 477 #endif // wxUSE_STATUSBAR
 478 }
 479
 480 // ----------------------------------------------------------------------------
 481 // event handlers: file and help menu
 482 // ----------------------------------------------------------------------------
 483
 484 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 485 {
 486     // true is to force the frame to close
 487     Close(true);
 488 }
 489
 490 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 491 {
 492     m_lbox->Clear();
 493 }
 494
 495 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 496 {
 497     wxMessageBox(_T("Exec wxWidgets Sample\n(c) 2000-2002 Vadim Zeitlin"),
 498                  _T("About Exec"), wxOK | wxICON_INFORMATION, this);
 499 }
 500
 501 void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
 502 {
 503     long pid = wxGetNumberFromUser(_T("Please specify the process to kill"),
 504                                    _T("Enter PID:"),
 505                                    _T("Exec question"),
 506                                    m_pidLast,
 507                                    // we need the full unsigned int range
 508                                    -INT_MAX, INT_MAX,
 509                                    this);
 510     if ( pid == -1 )
 511     {
 512         // cancelled
 513         return;
 514     }
 515
 516     static const wxString signalNames[] =
 517     {
 518         _T("Just test (SIGNONE)"),
 519         _T("Hangup (SIGHUP)"),
 520         _T("Interrupt (SIGINT)"),
 521         _T("Quit (SIGQUIT)"),
 522         _T("Illegal instruction (SIGILL)"),
 523         _T("Trap (SIGTRAP)"),
 524         _T("Abort (SIGABRT)"),
 525         _T("Emulated trap (SIGEMT)"),
 526         _T("FP exception (SIGFPE)"),
 527         _T("Kill (SIGKILL)"),
 528         _T("Bus (SIGBUS)"),
 529         _T("Segment violation (SIGSEGV)"),
 530         _T("System (SIGSYS)"),
 531         _T("Broken pipe (SIGPIPE)"),
 532         _T("Alarm (SIGALRM)"),
 533         _T("Terminate (SIGTERM)"),
 534     };
 535
 536     int sig = wxGetSingleChoiceIndex(_T("How to kill the process?"),
 537                                      _T("Exec question"),
 538                                      WXSIZEOF(signalNames), signalNames,
 539                                      this);
 540     switch ( sig )
 541     {
 542         default:
 543             wxFAIL_MSG( _T("unexpected return value") );
 544             // fall through
 545
 546         case -1:
 547             // cancelled
 548             return;
 549
 550         case wxSIGNONE:
 551         case wxSIGHUP:
 552         case wxSIGINT:
 553         case wxSIGQUIT:
 554         case wxSIGILL:
 555         case wxSIGTRAP:
 556         case wxSIGABRT:
 557         case wxSIGEMT:
 558         case wxSIGFPE:
 559         case wxSIGKILL:
 560         case wxSIGBUS:
 561         case wxSIGSEGV:
 562         case wxSIGSYS:
 563         case wxSIGPIPE:
 564         case wxSIGALRM:
 565         case wxSIGTERM:
 566             break;
 567     }
 568
 569     if ( sig == 0 )
 570     {
 571         if ( wxProcess::Exists(pid) )
 572             wxLogStatus(_T("Process %ld is running."), pid);
 573         else
 574             wxLogStatus(_T("No process with pid = %ld."), pid);
 575     }
 576     else // not SIGNONE
 577     {
 578         wxKillError rc = wxProcess::Kill(pid, (wxSignal)sig);
 579         if ( rc == wxKILL_OK )
 580         {
 581             wxLogStatus(_T("Process %ld killed with signal %d."), pid, sig);
 582         }
 583         else
 584         {
 585             static const wxChar *errorText[] =
 586             {
 587                 _T(""), // no error
 588                 _T("signal not supported"),
 589                 _T("permission denied"),
 590                 _T("no such process"),
 591                 _T("unspecified error"),
 592             };
 593
 594             wxLogStatus(_T("Failed to kill process %ld with signal %d: %s"),
 595                         pid, sig, errorText[rc]);
 596         }
 597     }
 598 }
 599
 600 // ----------------------------------------------------------------------------
 601 // event handlers: exec menu
 602 // ----------------------------------------------------------------------------
 603
 604 void MyFrame::DoAsyncExec(const wxString& cmd)
 605 {
 606     wxProcess *process = new MyProcess(this, cmd);
 607     m_pidLast = wxExecute(cmd, wxEXEC_ASYNC, process);
 608     if ( !m_pidLast )
 609     {
 610         wxLogError( _T("Execution of '%s' failed."), cmd.c_str() );
 611
 612         delete process;
 613     }
 614     else
 615     {
 616         wxLogStatus( _T("Process %ld (%s) launched."),
 617             m_pidLast, cmd.c_str() );
 618
 619         m_cmdLast = cmd;
 620     }
 621 }
 622
 623 void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
 624 {
 625     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 626                                      DIALOG_TITLE,
 627                                      m_cmdLast);
 628
 629     if ( !cmd )
 630         return;
 631
 632     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 633
 634     int code = wxExecute(cmd, wxEXEC_SYNC);
 635
 636     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 637         cmd.c_str(), code);
 638
 639     m_cmdLast = cmd;
 640 }
 641
 642 void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
 643 {
 644     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 645                                      DIALOG_TITLE,
 646                                      m_cmdLast);
 647
 648     if ( !cmd )
 649         return;
 650
 651     DoAsyncExec(cmd);
 652 }
 653
 654 void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
 655 {
 656     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 657                                      DIALOG_TITLE,
 658                                      m_cmdLast);
 659
 660     if ( !cmd )
 661         return;
 662
 663     int code = wxShell(cmd);
 664     wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
 665                 cmd.c_str(), code);
 666     m_cmdLast = cmd;
 667 }
 668
 669 void MyFrame::OnExecWithRedirect(wxCommandEvent& WXUNUSED(event))
 670 {
 671     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 672                                      DIALOG_TITLE,
 673                                      m_cmdLast);
 674
 675     if ( !cmd )
 676         return;
 677
 678     bool sync;
 679     switch ( wxMessageBox(_T("Execute it synchronously?"),
 680                           _T("Exec question"),
 681                           wxYES_NO | wxCANCEL | wxICON_QUESTION, this) )
 682     {
 683         case wxYES:
 684             sync = true;
 685             break;
 686
 687         case wxNO:
 688             sync = false;
 689             break;
 690
 691         default:
 692             return;
 693     }
 694
 695     if ( sync )
 696     {
 697         wxArrayString output, errors;
 698         int code = wxExecute(cmd, output, errors);
 699         wxLogStatus(_T("command '%s' terminated with exit code %d."),
 700                     cmd.c_str(), code);
 701
 702         if ( code != -1 )
 703         {
 704             ShowOutput(cmd, output, _T("Output"));
 705             ShowOutput(cmd, errors, _T("Errors"));
 706         }
 707     }
 708     else // async exec
 709     {
 710         MyPipedProcess *process = new MyPipedProcess(this, cmd);
 711         if ( !wxExecute(cmd, wxEXEC_ASYNC, process) )
 712         {
 713             wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 714
 715             delete process;
 716         }
 717         else
 718         {
 719             AddAsyncProcess(process);
 720         }
 721     }
 722
 723     m_cmdLast = cmd;
 724 }
 725
 726 void MyFrame::OnExecWithPipe(wxCommandEvent& WXUNUSED(event))
 727 {
 728     if ( !m_cmdLast )
 729         m_cmdLast = _T("tr [a-z] [A-Z]");
 730
 731     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 732                                      DIALOG_TITLE,
 733                                      m_cmdLast);
 734
 735     if ( !cmd )
 736         return;
 737
 738     wxString input = wxGetTextFromUser(_T("Enter the string to send to it: "),
 739                                        DIALOG_TITLE);
 740     if ( !input )
 741         return;
 742
 743     // always execute the filter asynchronously
 744     MyPipedProcess2 *process = new MyPipedProcess2(this, cmd, input);
 745     long pid = wxExecute(cmd, wxEXEC_ASYNC, process);
 746     if ( pid )
 747     {
 748         wxLogStatus( _T("Process %ld (%s) launched."), pid, cmd.c_str() );
 749
 750         AddAsyncProcess(process);
 751     }
 752     else
 753     {
 754         wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 755
 756         delete process;
 757     }
 758
 759     m_cmdLast = cmd;
 760 }
 761
 762 void MyFrame::OnPOpen(wxCommandEvent& WXUNUSED(event))
 763 {
 764     wxString cmd = wxGetTextFromUser(_T("Enter the command to launch: "),
 765                                      DIALOG_TITLE,
 766                                      m_cmdLast);
 767     if ( cmd.empty() )
 768         return;
 769
 770     wxProcess *process = wxProcess::Open(cmd);
 771     if ( !process )
 772     {
 773         wxLogError(_T("Failed to launch the command."));
 774         return;
 775     }
 776
 777     wxOutputStream *out = process->GetOutputStream();
 778     if ( !out )
 779     {
 780         wxLogError(_T("Failed to connect to child stdin"));
 781         return;
 782     }
 783
 784     wxInputStream *in = process->GetInputStream();
 785     if ( !in )
 786     {
 787         wxLogError(_T("Failed to connect to child stdout"));
 788         return;
 789     }
 790
 791     new MyPipeFrame(this, cmd, process);
 792 }
 793
 794 void MyFrame::OnFileExec(wxCommandEvent& WXUNUSED(event))
 795 {
 796     static wxString s_filename;
 797
 798     wxString filename;
 799
 800 #if wxUSE_FILEDLG
 801     filename = wxLoadFileSelector(wxEmptyString, wxEmptyString, s_filename);
 802 #endif // wxUSE_FILEDLG
 803
 804     if ( filename.empty() )
 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));
 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(wxEmptyString, 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(wxEmptyString, 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.empty() )
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_out(*process->GetOutputStream()),
1057              m_in(*process->GetInputStream()),
1058              m_err(*process->GetErrorStream())
1059 {
1060     m_process->SetNextHandler(this);
1061
1062     wxPanel *panel = new wxPanel(this, wxID_ANY);
1063
1064     m_textOut = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1065                               wxDefaultPosition, wxDefaultSize,
1066                               wxTE_PROCESS_ENTER);
1067     m_textIn = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1068                                wxDefaultPosition, wxDefaultSize,
1069                                wxTE_MULTILINE | wxTE_RICH);
1070     m_textIn->SetEditable(false);
1071     m_textErr = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
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 #if wxUSE_FILEDLG
1102     wxFileDialog filedlg(this, _T("Select file to send"));
1103     if ( filedlg.ShowModal() != wxID_OK )
1104         return;
1105
1106     wxFFile file(filedlg.GetFilename(), _T("r"));
1107     wxString data;
1108     if ( !file.IsOpened() || !file.ReadAll(&data) )
1109         return;
1110
1111     // can't write the entire string at once, this risk overflowing the pipe
1112     // and we would dead lock
1113     size_t len = data.length();
1114     const wxChar *pc = data.c_str();
1115     while ( len )
1116     {
1117         const size_t CHUNK_SIZE = 4096;
1118         m_out.Write(pc, len > CHUNK_SIZE ? CHUNK_SIZE : len);
1119
1120         // note that not all data could have been written as we don't block on
1121         // the write end of the pipe
1122         const size_t lenChunk = m_out.LastWrite();
1123
1124         pc += lenChunk;
1125         len -= lenChunk;
1126
1127         DoGet();
1128     }
1129 #endif // wxUSE_FILEDLG
1130 }
1131
1132 void MyPipeFrame::DoGet()
1133 {
1134     // we don't have any way to be notified when any input appears on the
1135     // stream so we have to poll it :-(
1136     DoGetFromStream(m_textIn, m_in);
1137     DoGetFromStream(m_textErr, m_err);
1138 }
1139
1140 void MyPipeFrame::DoGetFromStream(wxTextCtrl *text, wxInputStream& in)
1141 {
1142     while ( in.CanRead() )
1143     {
1144         wxChar buffer[4096];
1145         buffer[in.Read(buffer, WXSIZEOF(buffer) - 1).LastRead()] = _T('\0');
1146
1147         text->AppendText(buffer);
1148     }
1149 }
1150
1151 void MyPipeFrame::DoClose()
1152 {
1153     m_process->CloseOutput();
1154
1155     DisableInput();
1156 }
1157
1158 void MyPipeFrame::DisableInput()
1159 {
1160     m_textOut->SetEditable(false);
1161     FindWindow(Exec_Btn_Send)->Disable();
1162     FindWindow(Exec_Btn_SendFile)->Disable();
1163     FindWindow(Exec_Btn_Close)->Disable();
1164 }
1165
1166 void MyPipeFrame::DisableOutput()
1167 {
1168     FindWindow(Exec_Btn_Get)->Disable();
1169 }
1170
1171 void MyPipeFrame::OnClose(wxCloseEvent& event)
1172 {
1173     if ( m_process )
1174     {
1175         // we're not interested in getting the process termination notification
1176         // if we are closing it ourselves
1177         wxProcess *process = m_process;
1178         m_process = NULL;
1179         process->SetNextHandler(NULL);
1180
1181         process->CloseOutput();
1182     }
1183
1184     event.Skip();
1185 }
1186
1187 void MyPipeFrame::OnProcessTerm(wxProcessEvent& WXUNUSED(event))
1188 {
1189     DoGet();
1190
1191     delete m_process;
1192     m_process = NULL;
1193
1194     wxLogWarning(_T("The other process has terminated, closing"));
1195
1196     DisableInput();
1197     DisableOutput();
1198 }