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 #ifdef __GNUG__
  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" wxWindows headers
  34 #ifndef WX_PRECOMP
  35     #include "wx/app.h"
  36     #include "wx/frame.h"
  37
  38     #include "wx/utils.h"
  39     #include "wx/menu.h"
  40
  41     #include "wx/msgdlg.h"
  42     #include "wx/textdlg.h"
  43     #include "wx/filedlg.h"
  44     #include "wx/choicdlg.h"
  45
  46     #include "wx/button.h"
  47     #include "wx/textctrl.h"
  48     #include "wx/listbox.h"
  49
  50     #include "wx/sizer.h"
  51 #endif
  52
  53 #include "wx/txtstrm.h"
  54
  55 #include "wx/process.h"
  56
  57 #include "wx/mimetype.h"
  58
  59 #ifdef __WINDOWS__
  60     #include "wx/dde.h"
  61 #endif // __WINDOWS__
  62
  63 // ----------------------------------------------------------------------------
  64 // the usual application and main frame classes
  65 // ----------------------------------------------------------------------------
  66
  67 // Define a new application type, each program should derive a class from wxApp
  68 class MyApp : public wxApp
  69 {
  70 public:
  71     // override base class virtuals
  72     // ----------------------------
  73
  74     // this one is called on application startup and is a good place for the app
  75     // initialization (doing it here and not in the ctor allows to have an error
  76     // return: if OnInit() returns false, the application terminates)
  77     virtual bool OnInit();
  78 };
  79
  80 // Define an array of process pointers used by MyFrame
  81 class MyPipedProcess;
  82 WX_DEFINE_ARRAY(MyPipedProcess *, MyProcessesArray);
  83
  84 // Define a new frame type: this is going to be our main frame
  85 class MyFrame : public wxFrame
  86 {
  87 public:
  88     // ctor(s)
  89     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  90
  91     // event handlers (these functions should _not_ be virtual)
  92     void OnQuit(wxCommandEvent& event);
  93
  94     void OnKill(wxCommandEvent& event);
  95
  96     void OnClear(wxCommandEvent& event);
  97
  98     void OnSyncExec(wxCommandEvent& event);
  99     void OnAsyncExec(wxCommandEvent& event);
 100     void OnShell(wxCommandEvent& event);
 101     void OnExecWithRedirect(wxCommandEvent& event);
 102     void OnExecWithPipe(wxCommandEvent& event);
 103
 104     void OnPOpen(wxCommandEvent& event);
 105
 106     void OnFileExec(wxCommandEvent& event);
 107
 108     void OnAbout(wxCommandEvent& event);
 109
 110     // polling output of async processes
 111     void OnIdle(wxIdleEvent& event);
 112
 113     // for MyPipedProcess
 114     void OnProcessTerminated(MyPipedProcess *process);
 115     wxListBox *GetLogListBox() const { return m_lbox; }
 116
 117 private:
 118     void ShowOutput(const wxString& cmd,
 119                     const wxArrayString& output,
 120                     const wxString& title);
 121
 122     void DoAsyncExec(const wxString& cmd);
 123
 124     // the PID of the last process we launched asynchronously
 125     long m_pidLast;
 126
 127     // last command we executed
 128     wxString m_cmdLast;
 129
 130 #ifdef __WINDOWS__
 131     void OnDDEExec(wxCommandEvent& event);
 132     void OnDDERequest(wxCommandEvent& event);
 133
 134     bool GetDDEServer();
 135
 136     // last params of a DDE transaction
 137     wxString m_server,
 138              m_topic,
 139              m_cmdDde;
 140 #endif // __WINDOWS__
 141
 142     wxListBox *m_lbox;
 143
 144     MyProcessesArray m_running;
 145
 146     // any class wishing to process wxWindows events must use this macro
 147     DECLARE_EVENT_TABLE()
 148 };
 149
 150 // ----------------------------------------------------------------------------
 151 // MyPipeFrame: allows the user to communicate with the child process
 152 // ----------------------------------------------------------------------------
 153
 154 class MyPipeFrame : public wxFrame
 155 {
 156 public:
 157     MyPipeFrame(wxFrame *parent,
 158                 const wxString& cmd,
 159                 wxProcess *process);
 160
 161 protected:
 162     void OnTextEnter(wxCommandEvent& event) { DoSend(); }
 163     void OnBtnSend(wxCommandEvent& event) { DoSend(); }
 164     void OnBtnGet(wxCommandEvent& event) { DoGet(); }
 165
 166     void OnClose(wxCloseEvent& event);
 167
 168     void OnProcessTerm(wxProcessEvent& event);
 169
 170     void DoSend()
 171     {
 172         m_out.WriteString(m_textIn->GetValue() + '\n');
 173         m_textIn->Clear();
 174
 175         DoGet();
 176     }
 177
 178     void DoGet();
 179
 180 private:
 181     wxProcess *m_process;
 182
 183     wxTextInputStream m_in;
 184     wxTextOutputStream m_out;
 185
 186     wxTextCtrl *m_textIn,
 187                *m_textOut;
 188
 189     DECLARE_EVENT_TABLE()
 190 };
 191
 192 // ----------------------------------------------------------------------------
 193 // wxProcess-derived classes
 194 // ----------------------------------------------------------------------------
 195
 196 // This is the handler for process termination events
 197 class MyProcess : public wxProcess
 198 {
 199 public:
 200     MyProcess(MyFrame *parent, const wxString& cmd)
 201         : wxProcess(parent), m_cmd(cmd)
 202     {
 203         m_parent = parent;
 204     }
 205
 206     // instead of overriding this virtual function we might as well process the
 207     // event from it in the frame class - this might be more convenient in some
 208     // cases
 209     virtual void OnTerminate(int pid, int status);
 210
 211 protected:
 212     MyFrame *m_parent;
 213     wxString m_cmd;
 214 };
 215
 216 // A specialization of MyProcess for redirecting the output
 217 class MyPipedProcess : public MyProcess
 218 {
 219 public:
 220     MyPipedProcess(MyFrame *parent, const wxString& cmd)
 221         : MyProcess(parent, cmd)
 222         {
 223             Redirect();
 224         }
 225
 226     virtual void OnTerminate(int pid, int status);
 227
 228     virtual bool HasInput();
 229 };
 230
 231 // A version of MyPipedProcess which also sends input to the stdin of the
 232 // child process
 233 class MyPipedProcess2 : public MyPipedProcess
 234 {
 235 public:
 236     MyPipedProcess2(MyFrame *parent, const wxString& cmd, const wxString& input)
 237         : MyPipedProcess(parent, cmd), m_input(input)
 238         {
 239         }
 240
 241     virtual bool HasInput();
 242
 243 private:
 244     wxString m_input;
 245 };
 246
 247 // ----------------------------------------------------------------------------
 248 // constants
 249 // ----------------------------------------------------------------------------
 250
 251 // IDs for the controls and the menu commands
 252 enum
 253 {
 254     // menu items
 255     Exec_Quit = 100,
 256     Exec_Kill,
 257     Exec_ClearLog,
 258     Exec_SyncExec = 200,
 259     Exec_AsyncExec,
 260     Exec_Shell,
 261     Exec_POpen,
 262     Exec_OpenFile,
 263     Exec_DDEExec,
 264     Exec_DDERequest,
 265     Exec_Redirect,
 266     Exec_Pipe,
 267     Exec_About = 300,
 268
 269     // control ids
 270     Exec_Btn_Send = 1000,
 271     Exec_Btn_Get
 272 };
 273
 274 static const wxChar *DIALOG_TITLE = _T("Exec sample");
 275
 276 // ----------------------------------------------------------------------------
 277 // event tables and other macros for wxWindows
 278 // ----------------------------------------------------------------------------
 279
 280 // the event tables connect the wxWindows events with the functions (event
 281 // handlers) which process them. It can be also done at run-time, but for the
 282 // simple menu events like this the static method is much simpler.
 283 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 284     EVT_MENU(Exec_Quit,  MyFrame::OnQuit)
 285     EVT_MENU(Exec_Kill,  MyFrame::OnKill)
 286     EVT_MENU(Exec_ClearLog,  MyFrame::OnClear)
 287
 288     EVT_MENU(Exec_SyncExec, MyFrame::OnSyncExec)
 289     EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
 290     EVT_MENU(Exec_Shell, MyFrame::OnShell)
 291     EVT_MENU(Exec_Redirect, MyFrame::OnExecWithRedirect)
 292     EVT_MENU(Exec_Pipe, MyFrame::OnExecWithPipe)
 293
 294     EVT_MENU(Exec_POpen, MyFrame::OnPOpen)
 295
 296     EVT_MENU(Exec_OpenFile, MyFrame::OnFileExec)
 297
 298 #ifdef __WINDOWS__
 299     EVT_MENU(Exec_DDEExec, MyFrame::OnDDEExec)
 300     EVT_MENU(Exec_DDERequest, MyFrame::OnDDERequest)
 301 #endif // __WINDOWS__
 302
 303     EVT_MENU(Exec_About, MyFrame::OnAbout)
 304
 305     EVT_IDLE(MyFrame::OnIdle)
 306 END_EVENT_TABLE()
 307
 308 BEGIN_EVENT_TABLE(MyPipeFrame, wxFrame)
 309     EVT_BUTTON(Exec_Btn_Send, MyPipeFrame::OnBtnSend)
 310     EVT_BUTTON(Exec_Btn_Get, MyPipeFrame::OnBtnGet)
 311
 312     EVT_TEXT_ENTER(-1, MyPipeFrame::OnTextEnter)
 313
 314     EVT_CLOSE(MyPipeFrame::OnClose)
 315
 316     EVT_END_PROCESS(-1, MyPipeFrame::OnProcessTerm)
 317 END_EVENT_TABLE()
 318
 319 // Create a new application object: this macro will allow wxWindows to create
 320 // the application object during program execution (it's better than using a
 321 // static object for many reasons) and also declares the accessor function
 322 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 323 // not wxApp)
 324 IMPLEMENT_APP(MyApp)
 325
 326 // ============================================================================
 327 // implementation
 328 // ============================================================================
 329
 330 // ----------------------------------------------------------------------------
 331 // the application class
 332 // ----------------------------------------------------------------------------
 333
 334 // `Main program' equivalent: the program execution "starts" here
 335 bool MyApp::OnInit()
 336 {
 337     // Create the main application window
 338     MyFrame *frame = new MyFrame(_T("Exec wxWindows sample"),
 339                                  wxDefaultPosition, wxSize(500, 140));
 340
 341     // Show it and tell the application that it's our main window
 342     frame->Show(TRUE);
 343     SetTopWindow(frame);
 344
 345     // success: wxApp::OnRun() will be called which will enter the main message
 346     // loop and the application will run. If we returned FALSE here, the
 347     // application would exit immediately.
 348     return TRUE;
 349 }
 350
 351 // ----------------------------------------------------------------------------
 352 // main frame
 353 // ----------------------------------------------------------------------------
 354
 355 // frame constructor
 356 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 357        : wxFrame((wxFrame *)NULL, -1, title, pos, size)
 358 {
 359     m_pidLast = 0;
 360
 361 #ifdef __WXMAC__
 362     // we need this in order to allow the about menu relocation, since ABOUT is
 363     // not the default id of the about menu
 364     wxApp::s_macAboutMenuItemId = Exec_About;
 365 #endif
 366
 367     // create a menu bar
 368     wxMenu *menuFile = new wxMenu(_T(""), wxMENU_TEAROFF);
 369     menuFile->Append(Exec_Kill, _T("&Kill process...\tCtrl-K"),
 370                      _T("Kill a process by PID"));
 371     menuFile->AppendSeparator();
 372     menuFile->Append(Exec_ClearLog, _T("&Clear log\tCtrl-C"),
 373                      _T("Clear the log window"));
 374     menuFile->AppendSeparator();
 375     menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 376
 377     wxMenu *execMenu = new wxMenu;
 378     execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
 379                      _T("Launch a program and return when it terminates"));
 380     execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
 381                      _T("Launch a program and return immediately"));
 382     execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
 383                      _T("Launch a shell and execute a command in it"));
 384     execMenu->AppendSeparator();
 385     execMenu->Append(Exec_Redirect, _T("Capture command &output...\tCtrl-O"),
 386                      _T("Launch a program and capture its output"));
 387     execMenu->Append(Exec_Pipe, _T("&Pipe through command..."),
 388                      _T("Pipe a string through a filter"));
 389     execMenu->Append(Exec_POpen, _T("&Open a pipe to a command...\tCtrl-P"),
 390                      _T("Open a pipe to and from another program"));
 391
 392     execMenu->AppendSeparator();
 393     execMenu->Append(Exec_OpenFile, _T("Open &file...\tCtrl-F"),
 394                      _T("Launch the command to open this kind of files"));
 395 #ifdef __WINDOWS__
 396     execMenu->AppendSeparator();
 397     execMenu->Append(Exec_DDEExec, _T("Execute command via &DDE...\tCtrl-D"));
 398     execMenu->Append(Exec_DDERequest, _T("Send DDE &request...\tCtrl-R"));
 399 #endif
 400
 401     wxMenu *helpMenu = new wxMenu(_T(""), wxMENU_TEAROFF);
 402     helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
 403
 404     // now append the freshly created menu to the menu bar...
 405     wxMenuBar *menuBar = new wxMenuBar();
 406     menuBar->Append(menuFile, _T("&File"));
 407     menuBar->Append(execMenu, _T("&Exec"));
 408     menuBar->Append(helpMenu, _T("&Help"));
 409
 410     // ... and attach this menu bar to the frame
 411     SetMenuBar(menuBar);
 412
 413     // create the listbox in which we will show misc messages as they come
 414     m_lbox = new wxListBox(this, -1);
 415     wxFont font(12, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL,
 416                 wxFONTWEIGHT_NORMAL);
 417     if ( font.Ok() )
 418         m_lbox->SetFont(font);
 419
 420 #if wxUSE_STATUSBAR
 421     // create a status bar just for fun (by default with 1 pane only)
 422     CreateStatusBar();
 423     SetStatusText(_T("Welcome to wxWindows exec sample!"));
 424 #endif // wxUSE_STATUSBAR
 425 }
 426
 427 // ----------------------------------------------------------------------------
 428 // event handlers: file and help menu
 429 // ----------------------------------------------------------------------------
 430
 431 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 432 {
 433     // TRUE is to force the frame to close
 434     Close(TRUE);
 435 }
 436
 437 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 438 {
 439     m_lbox->Clear();
 440 }
 441
 442 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 443 {
 444     wxMessageBox(_T("Exec wxWindows Sample\n© 2000-2001 Vadim Zeitlin"),
 445                  _T("About Exec"), wxOK | wxICON_INFORMATION, this);
 446 }
 447
 448 void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
 449 {
 450     long pid = wxGetNumberFromUser(_T("Please specify the process to kill"),
 451                                    _T("Enter PID:"),
 452                                    _T("Exec question"),
 453                                    m_pidLast,
 454                                    // we need the full unsigned int range
 455                                    -INT_MAX, INT_MAX,
 456                                    this);
 457     if ( pid == -1 )
 458     {
 459         // cancelled
 460         return;
 461     }
 462
 463     static const wxString signalNames[] =
 464     {
 465         _T("Just test (SIGNONE)"),
 466         _T("Hangup (SIGHUP)"),
 467         _T("Interrupt (SIGINT)"),
 468         _T("Quit (SIGQUIT)"),
 469         _T("Illegal instruction (SIGILL)"),
 470         _T("Trap (SIGTRAP)"),
 471         _T("Abort (SIGABRT)"),
 472         _T("Emulated trap (SIGEMT)"),
 473         _T("FP exception (SIGFPE)"),
 474         _T("Kill (SIGKILL)"),
 475         _T("Bus (SIGBUS)"),
 476         _T("Segment violation (SIGSEGV)"),
 477         _T("System (SIGSYS)"),
 478         _T("Broken pipe (SIGPIPE)"),
 479         _T("Alarm (SIGALRM)"),
 480         _T("Terminate (SIGTERM)"),
 481     };
 482
 483     int sig = wxGetSingleChoiceIndex(_T("How to kill the process?"),
 484                                      _T("Exec question"),
 485                                      WXSIZEOF(signalNames), signalNames,
 486                                      this);
 487     switch ( sig )
 488     {
 489         default:
 490             wxFAIL_MSG( _T("unexpected return value") );
 491             // fall through
 492
 493         case -1:
 494             // cancelled
 495             return;
 496
 497         case wxSIGNONE:
 498         case wxSIGHUP:
 499         case wxSIGINT:
 500         case wxSIGQUIT:
 501         case wxSIGILL:
 502         case wxSIGTRAP:
 503         case wxSIGABRT:
 504         case wxSIGEMT:
 505         case wxSIGFPE:
 506         case wxSIGKILL:
 507         case wxSIGBUS:
 508         case wxSIGSEGV:
 509         case wxSIGSYS:
 510         case wxSIGPIPE:
 511         case wxSIGALRM:
 512         case wxSIGTERM:
 513             break;
 514     }
 515
 516     if ( sig == 0 )
 517     {
 518         if ( wxProcess::Exists(pid) )
 519             wxLogStatus(_T("Process %ld is running."), pid);
 520         else
 521             wxLogStatus(_T("No process with pid = %ld."), pid);
 522     }
 523     else // not SIGNONE
 524     {
 525         wxKillError rc = wxProcess::Kill(pid, (wxSignal)sig);
 526         if ( rc == wxKILL_OK )
 527         {
 528             wxLogStatus(_T("Process %ld killed with signal %d."), pid, sig);
 529         }
 530         else
 531         {
 532             static const wxChar *errorText[] =
 533             {
 534                 _T(""), // no error
 535                 _T("signal not supported"),
 536                 _T("permission denied"),
 537                 _T("no such process"),
 538                 _T("unspecified error"),
 539             };
 540
 541             wxLogStatus(_T("Failed to kill process %ld with signal %d: %s"),
 542                         pid, sig, errorText[rc]);
 543         }
 544     }
 545 }
 546
 547 // ----------------------------------------------------------------------------
 548 // event handlers: exec menu
 549 // ----------------------------------------------------------------------------
 550
 551 void MyFrame::DoAsyncExec(const wxString& cmd)
 552 {
 553     wxProcess *process = new MyProcess(this, cmd);
 554     m_pidLast = wxExecute(cmd, wxEXEC_ASYNC, process);
 555     if ( !m_pidLast )
 556     {
 557         wxLogError( _T("Execution of '%s' failed."), cmd.c_str() );
 558
 559         delete process;
 560     }
 561     else
 562     {
 563         wxLogStatus( _T("Process %ld (%s) launched."),
 564             m_pidLast, cmd.c_str() );
 565
 566         m_cmdLast = cmd;
 567     }
 568 }
 569
 570 void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
 571 {
 572     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 573                                      DIALOG_TITLE,
 574                                      m_cmdLast);
 575
 576     if ( !cmd )
 577         return;
 578
 579     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 580
 581     int code = wxExecute(cmd, wxEXEC_SYNC);
 582
 583     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 584         cmd.c_str(), code);
 585
 586     m_cmdLast = cmd;
 587 }
 588
 589 void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
 590 {
 591     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 592                                      DIALOG_TITLE,
 593                                      m_cmdLast);
 594
 595     if ( !cmd )
 596         return;
 597
 598     DoAsyncExec(cmd);
 599 }
 600
 601 void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
 602 {
 603     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 604                                      DIALOG_TITLE,
 605                                      m_cmdLast);
 606
 607     if ( !cmd )
 608         return;
 609
 610     int code = wxShell(cmd);
 611     wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
 612                 cmd.c_str(), code);
 613     m_cmdLast = cmd;
 614 }
 615
 616 void MyFrame::OnExecWithRedirect(wxCommandEvent& WXUNUSED(event))
 617 {
 618     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 619                                      DIALOG_TITLE,
 620                                      m_cmdLast);
 621
 622     if ( !cmd )
 623         return;
 624
 625     bool sync;
 626     switch ( wxMessageBox(_T("Execute it synchronously?"),
 627                           _T("Exec question"),
 628                           wxYES_NO | wxCANCEL | wxICON_QUESTION, this) )
 629     {
 630         case wxYES:
 631             sync = TRUE;
 632             break;
 633
 634         case wxNO:
 635             sync = FALSE;
 636             break;
 637
 638         default:
 639             return;
 640     }
 641
 642     if ( sync )
 643     {
 644         wxArrayString output, errors;
 645         int code = wxExecute(cmd, output, errors);
 646         wxLogStatus(_T("command '%s' terminated with exit code %d."),
 647                     cmd.c_str(), code);
 648
 649         if ( code != -1 )
 650         {
 651             ShowOutput(cmd, output, _T("Output"));
 652             ShowOutput(cmd, errors, _T("Errors"));
 653         }
 654     }
 655     else // async exec
 656     {
 657         MyPipedProcess *process = new MyPipedProcess(this, cmd);
 658         if ( !wxExecute(cmd, wxEXEC_ASYNC, process) )
 659         {
 660             wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 661
 662             delete process;
 663         }
 664         else
 665         {
 666             m_running.Add(process);
 667         }
 668     }
 669
 670     m_cmdLast = cmd;
 671 }
 672
 673 void MyFrame::OnExecWithPipe(wxCommandEvent& WXUNUSED(event))
 674 {
 675     if ( !m_cmdLast )
 676         m_cmdLast = _T("tr [a-z] [A-Z]");
 677
 678     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 679                                      DIALOG_TITLE,
 680                                      m_cmdLast);
 681
 682     if ( !cmd )
 683         return;
 684
 685     wxString input = wxGetTextFromUser(_T("Enter the string to send to it: "),
 686                                        DIALOG_TITLE);
 687     if ( !input )
 688         return;
 689
 690     // always execute the filter asynchronously
 691     MyPipedProcess2 *process = new MyPipedProcess2(this, cmd, input);
 692     long pid = wxExecute(cmd, wxEXEC_ASYNC, process);
 693     if ( pid )
 694     {
 695         wxLogStatus( _T("Process %ld (%s) launched."), pid, cmd.c_str() );
 696
 697         m_running.Add(process);
 698     }
 699     else
 700     {
 701         wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 702
 703         delete process;
 704     }
 705
 706     m_cmdLast = cmd;
 707 }
 708
 709 void MyFrame::OnPOpen(wxCommandEvent& event)
 710 {
 711     wxString cmd = wxGetTextFromUser(_T("Enter the command to launch: "),
 712                                      DIALOG_TITLE,
 713                                      m_cmdLast);
 714     if ( cmd.empty() )
 715         return;
 716
 717     wxProcess *process = wxProcess::Open(cmd);
 718     if ( !process )
 719     {
 720         wxLogError(_T("Failed to launch the command."));
 721         return;
 722     }
 723
 724     wxOutputStream *out = process->GetOutputStream();
 725     if ( !out )
 726     {
 727         wxLogError(_T("Failed to connect to child stdin"));
 728         return;
 729     }
 730
 731     wxInputStream *in = process->GetInputStream();
 732     if ( !in )
 733     {
 734         wxLogError(_T("Failed to connect to child stdout"));
 735         return;
 736     }
 737
 738     new MyPipeFrame(this, cmd, process);
 739 }
 740
 741 void MyFrame::OnFileExec(wxCommandEvent& event)
 742 {
 743     static wxString s_filename;
 744
 745     wxString filename = wxLoadFileSelector(_T(""), _T(""), s_filename);
 746     if ( !filename )
 747         return;
 748
 749     s_filename = filename;
 750
 751     wxString ext = filename.AfterFirst(_T('.'));
 752     wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
 753     if ( !ft )
 754     {
 755         wxLogError(_T("Impossible to determine the file type for extension '%s'"),
 756                    ext.c_str());
 757         return;
 758     }
 759
 760     wxString cmd;
 761     bool ok = ft->GetOpenCommand(&cmd,
 762                                  wxFileType::MessageParameters(filename, _T("")));
 763     delete ft;
 764     if ( !ok )
 765     {
 766         wxLogError(_T("Impossible to find out how to open files of extension '%s'"),
 767                    ext.c_str());
 768         return;
 769     }
 770
 771     DoAsyncExec(cmd);
 772 }
 773
 774 // ----------------------------------------------------------------------------
 775 // DDE stuff
 776 // ----------------------------------------------------------------------------
 777
 778 #ifdef __WINDOWS__
 779
 780 bool MyFrame::GetDDEServer()
 781 {
 782     wxString server = wxGetTextFromUser(_T("Server to connect to:"),
 783                                         DIALOG_TITLE, m_server);
 784     if ( !server )
 785         return FALSE;
 786
 787     m_server = server;
 788
 789     wxString topic = wxGetTextFromUser(_T("DDE topic:"), DIALOG_TITLE, m_topic);
 790     if ( !topic )
 791         return FALSE;
 792
 793     m_topic = topic;
 794
 795     wxString cmd = wxGetTextFromUser(_T("DDE command:"), DIALOG_TITLE, m_cmdDde);
 796     if ( !cmd )
 797         return FALSE;
 798
 799     m_cmdDde = cmd;
 800
 801     return TRUE;
 802 }
 803
 804 void MyFrame::OnDDEExec(wxCommandEvent& WXUNUSED(event))
 805 {
 806     if ( !GetDDEServer() )
 807         return;
 808
 809     wxDDEClient client;
 810     wxConnectionBase *conn = client.MakeConnection("", m_server, m_topic);
 811     if ( !conn )
 812     {
 813         wxLogError(_T("Failed to connect to the DDE server '%s'."),
 814                    m_server.c_str());
 815     }
 816     else
 817     {
 818         if ( !conn->Execute(m_cmdDde) )
 819         {
 820             wxLogError(_T("Failed to execute command '%s' via DDE."),
 821                        m_cmdDde.c_str());
 822         }
 823         else
 824         {
 825             wxLogStatus(_T("Successfully executed DDE command"));
 826         }
 827     }
 828 }
 829
 830 void MyFrame::OnDDERequest(wxCommandEvent& WXUNUSED(event))
 831 {
 832     if ( !GetDDEServer() )
 833         return;
 834
 835     wxDDEClient client;
 836     wxConnectionBase *conn = client.MakeConnection("", m_server, m_topic);
 837     if ( !conn )
 838     {
 839         wxLogError(_T("Failed to connect to the DDE server '%s'."),
 840                    m_server.c_str());
 841     }
 842     else
 843     {
 844         if ( !conn->Request(m_cmdDde) )
 845         {
 846             wxLogError(_T("Failed to  send request '%s' via DDE."),
 847                        m_cmdDde.c_str());
 848         }
 849         else
 850         {
 851             wxLogStatus(_T("Successfully sent DDE request."));
 852         }
 853     }
 854 }
 855
 856 #endif // __WINDOWS__
 857
 858 // ----------------------------------------------------------------------------
 859 // various helpers
 860 // ----------------------------------------------------------------------------
 861
 862 // input polling
 863 void MyFrame::OnIdle(wxIdleEvent& event)
 864 {
 865     size_t count = m_running.GetCount();
 866     for ( size_t n = 0; n < count; n++ )
 867     {
 868         if ( m_running[n]->HasInput() )
 869         {
 870             event.RequestMore();
 871         }
 872     }
 873 }
 874
 875 void MyFrame::OnProcessTerminated(MyPipedProcess *process)
 876 {
 877     m_running.Remove(process);
 878 }
 879
 880
 881 void MyFrame::ShowOutput(const wxString& cmd,
 882                          const wxArrayString& output,
 883                          const wxString& title)
 884 {
 885     size_t count = output.GetCount();
 886     if ( !count )
 887         return;
 888
 889     m_lbox->Append(wxString::Format(_T("--- %s of '%s' ---"),
 890                                     title.c_str(), cmd.c_str()));
 891
 892     for ( size_t n = 0; n < count; n++ )
 893     {
 894         m_lbox->Append(output[n]);
 895     }
 896
 897     m_lbox->Append(wxString::Format(_T("--- End of %s ---"),
 898                                     title.Lower().c_str()));
 899 }
 900
 901 // ----------------------------------------------------------------------------
 902 // MyProcess
 903 // ----------------------------------------------------------------------------
 904
 905 void MyProcess::OnTerminate(int pid, int status)
 906 {
 907     wxLogStatus(m_parent, _T("Process %u ('%s') terminated with exit code %d."),
 908                 pid, m_cmd.c_str(), status);
 909
 910     // we're not needed any more
 911     delete this;
 912 }
 913
 914 // ----------------------------------------------------------------------------
 915 // MyPipedProcess
 916 // ----------------------------------------------------------------------------
 917
 918 bool MyPipedProcess::HasInput()
 919 {
 920     bool hasInput = FALSE;
 921
 922     wxInputStream& is = *GetInputStream();
 923     if ( !is.Eof() )
 924     {
 925         wxTextInputStream tis(is);
 926
 927         // this assumes that the output is always line buffered
 928         wxString msg;
 929         msg << m_cmd << _T(" (stdout): ") << tis.ReadLine();
 930
 931         m_parent->GetLogListBox()->Append(msg);
 932
 933         hasInput = TRUE;
 934     }
 935
 936     wxInputStream& es = *GetErrorStream();
 937     if ( !es.Eof() )
 938     {
 939         wxTextInputStream tis(es);
 940
 941         // this assumes that the output is always line buffered
 942         wxString msg;
 943         msg << m_cmd << _T(" (stderr): ") << tis.ReadLine();
 944
 945         m_parent->GetLogListBox()->Append(msg);
 946
 947         hasInput = TRUE;
 948     }
 949
 950     return hasInput;
 951 }
 952
 953 void MyPipedProcess::OnTerminate(int pid, int status)
 954 {
 955     // show the rest of the output
 956     while ( HasInput() )
 957         ;
 958
 959     m_parent->OnProcessTerminated(this);
 960
 961     MyProcess::OnTerminate(pid, status);
 962 }
 963
 964 // ----------------------------------------------------------------------------
 965 // MyPipedProcess2
 966 // ----------------------------------------------------------------------------
 967
 968 bool MyPipedProcess2::HasInput()
 969 {
 970     if ( !!m_input )
 971     {
 972         wxTextOutputStream os(*GetOutputStream());
 973         os.WriteString(m_input);
 974
 975         CloseOutput();
 976         m_input.clear();
 977
 978         // call us once again - may be we'll have output
 979         return TRUE;
 980     }
 981
 982     return MyPipedProcess::HasInput();
 983 }
 984
 985 // ============================================================================
 986 // MyPipeFrame implementation
 987 // ============================================================================
 988
 989 MyPipeFrame::MyPipeFrame(wxFrame *parent,
 990                          const wxString& cmd,
 991                          wxProcess *process)
 992            : wxFrame(parent, -1, cmd),
 993              m_process(process),
 994              // in a real program we'd check that the streams are !NULL here
 995              m_in(*process->GetInputStream()),
 996              m_out(*process->GetOutputStream())
 997 {
 998     m_process->SetNextHandler(this);
 999
1000     wxPanel *panel = new wxPanel(this, -1);
1001
1002     m_textIn = new wxTextCtrl(panel, -1, _T(""),
1003                               wxDefaultPosition, wxDefaultSize,
1004                               wxTE_PROCESS_ENTER);
1005     m_textOut = new wxTextCtrl(panel, -1, _T(""));
1006     m_textOut->SetEditable(FALSE);
1007
1008     wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
1009     sizerTop->Add(m_textIn, 0, wxGROW | wxALL, 5);
1010
1011     wxSizer *sizerBtns = new wxBoxSizer(wxHORIZONTAL);
1012     sizerBtns->Add(new wxButton(panel, Exec_Btn_Send, _T("&Send")), 0,
1013                    wxALL, 10);
1014     sizerBtns->Add(new wxButton(panel, Exec_Btn_Get, _T("&Get")), 0,
1015                    wxALL, 10);
1016
1017     sizerTop->Add(sizerBtns, 0, wxCENTRE | wxALL, 5);
1018     sizerTop->Add(m_textOut, 0, wxGROW | wxALL, 5);
1019
1020     panel->SetSizer(sizerTop);
1021     sizerTop->Fit(this);
1022
1023     Show();
1024 }
1025
1026 void MyPipeFrame::DoGet()
1027 {
1028     // we don't have any way to be notified when any input appears on the
1029     // stream so we have to poll it :-(
1030     //
1031     // NB: this really must be done because otherwise the other program might
1032     //     not have enough time to receive or process our data and we'd read
1033     //     an empty string
1034     while ( !m_process->IsInputAvailable() && m_process->IsInputOpened() )
1035         ;
1036
1037     m_textOut->SetValue(m_in.ReadLine());
1038 }
1039
1040 void MyPipeFrame::OnClose(wxCloseEvent& event)
1041 {
1042     if ( m_process )
1043     {
1044         // we're not interested in getting the process termination notification
1045         // if we are closing it ourselves
1046         wxProcess *process = m_process;
1047         m_process = NULL;
1048         process->SetNextHandler(NULL);
1049
1050         process->CloseOutput();
1051     }
1052
1053     event.Skip();
1054 }
1055
1056 void MyPipeFrame::OnProcessTerm(wxProcessEvent& event)
1057 {
1058     delete m_process;
1059     m_process = NULL;
1060
1061     wxLogWarning(_T("The other process has terminated, closing"));
1062
1063     Close();
1064 }