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