samples/exec/exec.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        exec.cpp
   3 // Purpose:     exec sample demonstrates wxExecute and related functions
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     15.01.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWidgets headers
  29 #ifndef WX_PRECOMP
  30     #include "wx/app.h"
  31     #include "wx/log.h"
  32     #include "wx/frame.h"
  33     #include "wx/panel.h"
  34
  35     #include "wx/timer.h"
  36
  37     #include "wx/utils.h"
  38     #include "wx/menu.h"
  39
  40     #include "wx/msgdlg.h"
  41     #include "wx/textdlg.h"
  42     #include "wx/filedlg.h"
  43     #include "wx/choicdlg.h"
  44
  45     #include "wx/button.h"
  46     #include "wx/textctrl.h"
  47     #include "wx/listbox.h"
  48
  49     #include "wx/sizer.h"
  50 #endif
  51
  52 #include "wx/txtstrm.h"
  53 #include "wx/numdlg.h"
  54 #include "wx/textdlg.h"
  55 #include "wx/ffile.h"
  56 #include "wx/stopwatch.h"
  57
  58 #include "wx/process.h"
  59
  60 #include "wx/mimetype.h"
  61
  62 #ifdef __WINDOWS__
  63     #include "wx/dde.h"
  64 #endif // __WINDOWS__
  65
  66 // ----------------------------------------------------------------------------
  67 // the usual application and main frame classes
  68 // ----------------------------------------------------------------------------
  69
  70 // Define a new application type, each program should derive a class from wxApp
  71 class MyApp : public wxApp
  72 {
  73 public:
  74     // override base class virtuals
  75     // ----------------------------
  76
  77     // this one is called on application startup and is a good place for the app
  78     // initialization (doing it here and not in the ctor allows to have an error
  79     // return: if OnInit() returns false, the application terminates)
  80     virtual bool OnInit();
  81 };
  82
  83 // Define an array of process pointers used by MyFrame
  84 class MyPipedProcess;
  85 WX_DEFINE_ARRAY_PTR(MyPipedProcess *, MyPipedProcessesArray);
  86
  87 class MyProcess;
  88 WX_DEFINE_ARRAY_PTR(MyProcess *, MyProcessesArray);
  89
  90 // Define a new frame type: this is going to be our main frame
  91 class MyFrame : public wxFrame
  92 {
  93 public:
  94     // ctor and dtor
  95     MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
  96     virtual ~MyFrame();
  97
  98     // event handlers (these functions should _not_ be virtual)
  99     void OnQuit(wxCommandEvent& event);
 100
 101     void OnKill(wxCommandEvent& event);
 102
 103     void OnClear(wxCommandEvent& event);
 104
 105     void OnBeginBusyCursor(wxCommandEvent& event);
 106     void OnEndBusyCursor(wxCommandEvent& event);
 107
 108     void OnSyncExec(wxCommandEvent& event);
 109     void OnSyncNoEventsExec(wxCommandEvent& event);
 110     void OnAsyncExec(wxCommandEvent& event);
 111     void OnShell(wxCommandEvent& event);
 112     void OnExecWithRedirect(wxCommandEvent& event);
 113     void OnExecWithPipe(wxCommandEvent& event);
 114
 115     void OnPOpen(wxCommandEvent& event);
 116
 117     void OnFileExec(wxCommandEvent& event);
 118     void OnFileLaunch(wxCommandEvent& event);
 119     void OnOpenURL(wxCommandEvent& event);
 120
 121     void OnAbout(wxCommandEvent& event);
 122
 123     // polling output of async processes
 124     void OnIdleTimer(wxTimerEvent& event);
 125     void OnIdle(wxIdleEvent& event);
 126
 127     // for MyPipedProcess
 128     void OnProcessTerminated(MyPipedProcess *process);
 129     wxListBox *GetLogListBox() const { return m_lbox; }
 130
 131     // for MyProcess
 132     void OnAsyncTermination(MyProcess *process);
 133
 134     // timer updating a counter in the background
 135     void OnBgTimer(wxTimerEvent& event);
 136
 137 private:
 138     void ShowOutput(const wxString& cmd,
 139                     const wxArrayString& output,
 140                     const wxString& title);
 141
 142     void DoAsyncExec(const wxString& cmd);
 143
 144     void AddAsyncProcess(MyProcess *process) { m_allAsync.push_back(process); }
 145
 146     void AddPipedProcess(MyPipedProcess *process);
 147     void RemovePipedProcess(MyPipedProcess *process);
 148
 149
 150     // the PID of the last process we launched asynchronously
 151     long m_pidLast;
 152
 153     // last command we executed
 154     wxString m_cmdLast;
 155
 156 #ifdef __WINDOWS__
 157     void OnDDEExec(wxCommandEvent& event);
 158     void OnDDERequest(wxCommandEvent& event);
 159
 160     bool GetDDEServer();
 161
 162     // last params of a DDE transaction
 163     wxString m_server,
 164              m_topic,
 165              m_cmdDde;
 166 #endif // __WINDOWS__
 167
 168     wxListBox *m_lbox;
 169
 170     // array of running processes with redirected IO
 171     MyPipedProcessesArray m_running;
 172
 173     // array of all asynchrously running processes
 174     MyProcessesArray m_allAsync;
 175
 176     // the idle event wake up timer
 177     wxTimer m_timerIdleWakeUp;
 178
 179     // a background timer allowing to easily check visually whether the
 180     // messages are processed or not
 181     wxTimer m_timerBg;
 182
 183     // any class wishing to process wxWidgets events must use this macro
 184     DECLARE_EVENT_TABLE()
 185 };
 186
 187 // ----------------------------------------------------------------------------
 188 // MyPipeFrame: allows the user to communicate with the child process
 189 // ----------------------------------------------------------------------------
 190
 191 class MyPipeFrame : public wxFrame
 192 {
 193 public:
 194     MyPipeFrame(wxFrame *parent,
 195                 const wxString& cmd,
 196                 wxProcess *process);
 197
 198 protected:
 199     void OnTextEnter(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 200     void OnBtnSend(wxCommandEvent& WXUNUSED(event)) { DoSend(); }
 201     void OnBtnSendFile(wxCommandEvent& WXUNUSED(event));
 202     void OnBtnGet(wxCommandEvent& WXUNUSED(event)) { DoGet(); }
 203     void OnBtnClose(wxCommandEvent& WXUNUSED(event)) { DoClose(); }
 204
 205     void OnClose(wxCloseEvent& event);
 206
 207     void OnProcessTerm(wxProcessEvent& event);
 208
 209     void DoSend()
 210     {
 211         wxString s(m_textOut->GetValue());
 212         s += _T('\n');
 213         m_out.Write(s.c_str(), s.length());
 214         m_textOut->Clear();
 215
 216         DoGet();
 217     }
 218
 219     void DoGet();
 220     void DoClose();
 221
 222 private:
 223     void DoGetFromStream(wxTextCtrl *text, wxInputStream& in);
 224     void DisableInput();
 225     void DisableOutput();
 226
 227
 228     wxProcess *m_process;
 229
 230     wxOutputStream &m_out;
 231     wxInputStream &m_in,
 232                   &m_err;
 233
 234     wxTextCtrl *m_textOut,
 235                *m_textIn,
 236                *m_textErr;
 237
 238     DECLARE_EVENT_TABLE()
 239 };
 240
 241 // ----------------------------------------------------------------------------
 242 // wxProcess-derived classes
 243 // ----------------------------------------------------------------------------
 244
 245 // This is the handler for process termination events
 246 class MyProcess : public wxProcess
 247 {
 248 public:
 249     MyProcess(MyFrame *parent, const wxString& cmd)
 250         : wxProcess(parent), m_cmd(cmd)
 251     {
 252         m_parent = parent;
 253     }
 254
 255     // instead of overriding this virtual function we might as well process the
 256     // event from it in the frame class - this might be more convenient in some
 257     // cases
 258     virtual void OnTerminate(int pid, int status);
 259
 260 protected:
 261     MyFrame *m_parent;
 262     wxString m_cmd;
 263 };
 264
 265 // A specialization of MyProcess for redirecting the output
 266 class MyPipedProcess : public MyProcess
 267 {
 268 public:
 269     MyPipedProcess(MyFrame *parent, const wxString& cmd)
 270         : MyProcess(parent, cmd)
 271         {
 272             Redirect();
 273         }
 274
 275     virtual void OnTerminate(int pid, int status);
 276
 277     virtual bool HasInput();
 278 };
 279
 280 // A version of MyPipedProcess which also sends input to the stdin of the
 281 // child process
 282 class MyPipedProcess2 : public MyPipedProcess
 283 {
 284 public:
 285     MyPipedProcess2(MyFrame *parent, const wxString& cmd, const wxString& input)
 286         : MyPipedProcess(parent, cmd), m_input(input)
 287         {
 288         }
 289
 290     virtual bool HasInput();
 291
 292 private:
 293     wxString m_input;
 294 };
 295
 296 // ----------------------------------------------------------------------------
 297 // constants
 298 // ----------------------------------------------------------------------------
 299
 300 // IDs for the controls and the menu commands
 301 enum
 302 {
 303     // timer ids
 304     Exec_TimerIdle = 10,
 305     Exec_TimerBg,
 306
 307     // menu items
 308     Exec_Quit = 100,
 309     Exec_Kill,
 310     Exec_ClearLog,
 311     Exec_BeginBusyCursor,
 312     Exec_EndBusyCursor,
 313     Exec_SyncExec = 200,
 314     Exec_SyncNoEventsExec,
 315     Exec_AsyncExec,
 316     Exec_Shell,
 317     Exec_POpen,
 318     Exec_OpenFile,
 319     Exec_LaunchFile,
 320     Exec_OpenURL,
 321     Exec_DDEExec,
 322     Exec_DDERequest,
 323     Exec_Redirect,
 324     Exec_Pipe,
 325     Exec_About = wxID_ABOUT,
 326
 327     // control ids
 328     Exec_Btn_Send = 1000,
 329     Exec_Btn_SendFile,
 330     Exec_Btn_Get,
 331     Exec_Btn_Close
 332 };
 333
 334 static const wxChar *DIALOG_TITLE = _T("Exec sample");
 335
 336 // ----------------------------------------------------------------------------
 337 // event tables and other macros for wxWidgets
 338 // ----------------------------------------------------------------------------
 339
 340 // the event tables connect the wxWidgets events with the functions (event
 341 // handlers) which process them. It can be also done at run-time, but for the
 342 // simple menu events like this the static method is much simpler.
 343 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 344     EVT_MENU(Exec_Quit,  MyFrame::OnQuit)
 345     EVT_MENU(Exec_Kill,  MyFrame::OnKill)
 346     EVT_MENU(Exec_ClearLog,  MyFrame::OnClear)
 347     EVT_MENU(Exec_BeginBusyCursor,  MyFrame::OnBeginBusyCursor)
 348     EVT_MENU(Exec_EndBusyCursor,  MyFrame::OnEndBusyCursor)
 349
 350     EVT_MENU(Exec_SyncExec, MyFrame::OnSyncExec)
 351     EVT_MENU(Exec_SyncNoEventsExec, MyFrame::OnSyncNoEventsExec)
 352     EVT_MENU(Exec_AsyncExec, MyFrame::OnAsyncExec)
 353     EVT_MENU(Exec_Shell, MyFrame::OnShell)
 354     EVT_MENU(Exec_Redirect, MyFrame::OnExecWithRedirect)
 355     EVT_MENU(Exec_Pipe, MyFrame::OnExecWithPipe)
 356
 357     EVT_MENU(Exec_POpen, MyFrame::OnPOpen)
 358
 359     EVT_MENU(Exec_OpenFile, MyFrame::OnFileExec)
 360     EVT_MENU(Exec_LaunchFile, MyFrame::OnFileLaunch)
 361     EVT_MENU(Exec_OpenURL, MyFrame::OnOpenURL)
 362
 363 #ifdef __WINDOWS__
 364     EVT_MENU(Exec_DDEExec, MyFrame::OnDDEExec)
 365     EVT_MENU(Exec_DDERequest, MyFrame::OnDDERequest)
 366 #endif // __WINDOWS__
 367
 368     EVT_MENU(Exec_About, MyFrame::OnAbout)
 369
 370     EVT_IDLE(MyFrame::OnIdle)
 371
 372     EVT_TIMER(Exec_TimerIdle, MyFrame::OnIdleTimer)
 373     EVT_TIMER(Exec_TimerBg, MyFrame::OnBgTimer)
 374 END_EVENT_TABLE()
 375
 376 BEGIN_EVENT_TABLE(MyPipeFrame, wxFrame)
 377     EVT_BUTTON(Exec_Btn_Send, MyPipeFrame::OnBtnSend)
 378     EVT_BUTTON(Exec_Btn_SendFile, MyPipeFrame::OnBtnSendFile)
 379     EVT_BUTTON(Exec_Btn_Get, MyPipeFrame::OnBtnGet)
 380     EVT_BUTTON(Exec_Btn_Close, MyPipeFrame::OnBtnClose)
 381
 382     EVT_TEXT_ENTER(wxID_ANY, MyPipeFrame::OnTextEnter)
 383
 384     EVT_CLOSE(MyPipeFrame::OnClose)
 385
 386     EVT_END_PROCESS(wxID_ANY, MyPipeFrame::OnProcessTerm)
 387 END_EVENT_TABLE()
 388
 389 // Create a new application object: this macro will allow wxWidgets to create
 390 // the application object during program execution (it's better than using a
 391 // static object for many reasons) and also declares the accessor function
 392 // wxGetApp() which will return the reference of the right type (i.e. MyApp and
 393 // not wxApp)
 394 IMPLEMENT_APP(MyApp)
 395
 396 // ============================================================================
 397 // implementation
 398 // ============================================================================
 399
 400 // ----------------------------------------------------------------------------
 401 // the application class
 402 // ----------------------------------------------------------------------------
 403
 404 // `Main program' equivalent: the program execution "starts" here
 405 bool MyApp::OnInit()
 406 {
 407     if ( !wxApp::OnInit() )
 408         return false;
 409
 410     // Create the main application window
 411     MyFrame *frame = new MyFrame(_T("Exec wxWidgets sample"),
 412                                  wxDefaultPosition, wxSize(500, 140));
 413
 414     // Show it and tell the application that it's our main window
 415     frame->Show(true);
 416     SetTopWindow(frame);
 417
 418     // success: wxApp::OnRun() will be called which will enter the main message
 419     // loop and the application will run. If we returned false here, the
 420     // application would exit immediately.
 421     return true;
 422 }
 423
 424 // ----------------------------------------------------------------------------
 425 // main frame
 426 // ----------------------------------------------------------------------------
 427
 428 #ifdef __VISUALC__
 429 #pragma warning(disable: 4355) // this used in base member initializer list
 430 #endif
 431
 432 // frame constructor
 433 MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
 434        : wxFrame((wxFrame *)NULL, wxID_ANY, title, pos, size),
 435          m_timerIdleWakeUp(this, Exec_TimerIdle),
 436          m_timerBg(this, Exec_TimerBg)
 437 {
 438     m_pidLast = 0;
 439
 440 #ifdef __WXMAC__
 441     // we need this in order to allow the about menu relocation, since ABOUT is
 442     // not the default id of the about menu
 443     wxApp::s_macAboutMenuItemId = Exec_About;
 444 #endif
 445
 446     // create a menu bar
 447     wxMenu *menuFile = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 448     menuFile->Append(Exec_Kill, _T("&Kill process...\tCtrl-K"),
 449                      _T("Kill a process by PID"));
 450     menuFile->AppendSeparator();
 451     menuFile->Append(Exec_ClearLog, _T("&Clear log\tCtrl-L"),
 452                      _T("Clear the log window"));
 453     menuFile->AppendSeparator();
 454     menuFile->Append(Exec_BeginBusyCursor, _T("Show &busy cursor\tCtrl-C"));
 455     menuFile->Append(Exec_EndBusyCursor, _T("Show &normal cursor\tShift-Ctrl-C"));
 456     menuFile->AppendSeparator();
 457     menuFile->Append(Exec_Quit, _T("E&xit\tAlt-X"), _T("Quit this program"));
 458
 459     wxMenu *execMenu = new wxMenu;
 460     execMenu->Append(Exec_SyncExec, _T("Sync &execution...\tCtrl-E"),
 461                      _T("Launch a program and return when it terminates"));
 462     execMenu->Append(Exec_SyncNoEventsExec, _T("Sync execution and &block...\tCtrl-B"),
 463                      _T("Launch a program and block until it terminates"));
 464     execMenu->Append(Exec_AsyncExec, _T("&Async execution...\tCtrl-A"),
 465                      _T("Launch a program and return immediately"));
 466     execMenu->Append(Exec_Shell, _T("Execute &shell command...\tCtrl-S"),
 467                      _T("Launch a shell and execute a command in it"));
 468     execMenu->AppendSeparator();
 469     execMenu->Append(Exec_Redirect, _T("Capture command &output...\tCtrl-O"),
 470                      _T("Launch a program and capture its output"));
 471     execMenu->Append(Exec_Pipe, _T("&Pipe through command..."),
 472                      _T("Pipe a string through a filter"));
 473     execMenu->Append(Exec_POpen, _T("&Open a pipe to a command...\tCtrl-P"),
 474                      _T("Open a pipe to and from another program"));
 475
 476     execMenu->AppendSeparator();
 477     execMenu->Append(Exec_OpenFile, _T("Open &file...\tCtrl-F"),
 478                      _T("Launch the command to open this kind of files"));
 479     execMenu->Append(Exec_LaunchFile, _T("La&unch file...\tShift-Ctrl-F"),
 480                      _T("Launch the default application associated with the file"));
 481     execMenu->Append(Exec_OpenURL, _T("Open &URL...\tCtrl-U"),
 482                      _T("Launch the default browser with the given URL"));
 483 #ifdef __WINDOWS__
 484     execMenu->AppendSeparator();
 485     execMenu->Append(Exec_DDEExec, _T("Execute command via &DDE...\tCtrl-D"));
 486     execMenu->Append(Exec_DDERequest, _T("Send DDE &request...\tCtrl-R"));
 487 #endif
 488
 489     wxMenu *helpMenu = new wxMenu(wxEmptyString, wxMENU_TEAROFF);
 490     helpMenu->Append(Exec_About, _T("&About...\tF1"), _T("Show about dialog"));
 491
 492     // now append the freshly created menu to the menu bar...
 493     wxMenuBar *menuBar = new wxMenuBar();
 494     menuBar->Append(menuFile, _T("&File"));
 495     menuBar->Append(execMenu, _T("&Exec"));
 496     menuBar->Append(helpMenu, _T("&Help"));
 497
 498     // ... and attach this menu bar to the frame
 499     SetMenuBar(menuBar);
 500
 501     // create the listbox in which we will show misc messages as they come
 502     m_lbox = new wxListBox(this, wxID_ANY);
 503     wxFont font(12, wxFONTFAMILY_TELETYPE, wxFONTSTYLE_NORMAL,
 504                 wxFONTWEIGHT_NORMAL);
 505     if ( font.Ok() )
 506         m_lbox->SetFont(font);
 507
 508 #if wxUSE_STATUSBAR
 509     // create a status bar just for fun (by default with 1 pane only)
 510     CreateStatusBar(2);
 511     SetStatusText(_T("Welcome to wxWidgets exec sample!"));
 512 #endif // wxUSE_STATUSBAR
 513
 514     m_timerBg.Start(1000);
 515 }
 516
 517 MyFrame::~MyFrame()
 518 {
 519     // any processes left until now must be deleted manually: normally this is
 520     // done when the associated process terminates but it must be still running
 521     // if this didn't happen until now
 522     for ( size_t n = 0; n < m_allAsync.size(); n++ )
 523     {
 524         delete m_allAsync[n];
 525     }
 526 }
 527
 528 // ----------------------------------------------------------------------------
 529 // event handlers: file and help menu
 530 // ----------------------------------------------------------------------------
 531
 532 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 533 {
 534     // true is to force the frame to close
 535     Close(true);
 536 }
 537
 538 void MyFrame::OnClear(wxCommandEvent& WXUNUSED(event))
 539 {
 540     m_lbox->Clear();
 541 }
 542
 543 void MyFrame::OnBeginBusyCursor(wxCommandEvent& WXUNUSED(event))
 544 {
 545     wxBeginBusyCursor();
 546 }
 547
 548 void MyFrame::OnEndBusyCursor(wxCommandEvent& WXUNUSED(event))
 549 {
 550     wxEndBusyCursor();
 551 }
 552
 553 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 554 {
 555     wxMessageBox(_T("Exec wxWidgets Sample\n(c) 2000-2002 Vadim Zeitlin"),
 556                  _T("About Exec"), wxOK | wxICON_INFORMATION, this);
 557 }
 558
 559 void MyFrame::OnKill(wxCommandEvent& WXUNUSED(event))
 560 {
 561     long pid = wxGetNumberFromUser(_T("Please specify the process to kill"),
 562                                    _T("Enter PID:"),
 563                                    _T("Exec question"),
 564                                    m_pidLast,
 565                                    // we need the full unsigned int range
 566                                    -INT_MAX, INT_MAX,
 567                                    this);
 568     if ( pid == -1 )
 569     {
 570         // cancelled
 571         return;
 572     }
 573
 574     static const wxString signalNames[] =
 575     {
 576         _T("Just test (SIGNONE)"),
 577         _T("Hangup (SIGHUP)"),
 578         _T("Interrupt (SIGINT)"),
 579         _T("Quit (SIGQUIT)"),
 580         _T("Illegal instruction (SIGILL)"),
 581         _T("Trap (SIGTRAP)"),
 582         _T("Abort (SIGABRT)"),
 583         _T("Emulated trap (SIGEMT)"),
 584         _T("FP exception (SIGFPE)"),
 585         _T("Kill (SIGKILL)"),
 586         _T("Bus (SIGBUS)"),
 587         _T("Segment violation (SIGSEGV)"),
 588         _T("System (SIGSYS)"),
 589         _T("Broken pipe (SIGPIPE)"),
 590         _T("Alarm (SIGALRM)"),
 591         _T("Terminate (SIGTERM)"),
 592     };
 593
 594     int sig = wxGetSingleChoiceIndex(_T("How to kill the process?"),
 595                                      _T("Exec question"),
 596                                      WXSIZEOF(signalNames), signalNames,
 597                                      this);
 598     switch ( sig )
 599     {
 600         default:
 601             wxFAIL_MSG( _T("unexpected return value") );
 602             // fall through
 603
 604         case -1:
 605             // cancelled
 606             return;
 607
 608         case wxSIGNONE:
 609         case wxSIGHUP:
 610         case wxSIGINT:
 611         case wxSIGQUIT:
 612         case wxSIGILL:
 613         case wxSIGTRAP:
 614         case wxSIGABRT:
 615         case wxSIGEMT:
 616         case wxSIGFPE:
 617         case wxSIGKILL:
 618         case wxSIGBUS:
 619         case wxSIGSEGV:
 620         case wxSIGSYS:
 621         case wxSIGPIPE:
 622         case wxSIGALRM:
 623         case wxSIGTERM:
 624             break;
 625     }
 626
 627     if ( sig == 0 )
 628     {
 629         if ( wxProcess::Exists(pid) )
 630             wxLogStatus(_T("Process %ld is running."), pid);
 631         else
 632             wxLogStatus(_T("No process with pid = %ld."), pid);
 633     }
 634     else // not SIGNONE
 635     {
 636         wxKillError rc = wxProcess::Kill(pid, (wxSignal)sig);
 637         if ( rc == wxKILL_OK )
 638         {
 639             wxLogStatus(_T("Process %ld killed with signal %d."), pid, sig);
 640         }
 641         else
 642         {
 643             static const wxChar *errorText[] =
 644             {
 645                 _T(""), // no error
 646                 _T("signal not supported"),
 647                 _T("permission denied"),
 648                 _T("no such process"),
 649                 _T("unspecified error"),
 650             };
 651
 652             wxLogStatus(_T("Failed to kill process %ld with signal %d: %s"),
 653                         pid, sig, errorText[rc]);
 654         }
 655     }
 656 }
 657
 658 // ----------------------------------------------------------------------------
 659 // event handlers: exec menu
 660 // ----------------------------------------------------------------------------
 661
 662 void MyFrame::DoAsyncExec(const wxString& cmd)
 663 {
 664     MyProcess * const process = new MyProcess(this, cmd);
 665     m_pidLast = wxExecute(cmd, wxEXEC_ASYNC, process);
 666     if ( !m_pidLast )
 667     {
 668         wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 669
 670         delete process;
 671     }
 672     else
 673     {
 674         wxLogStatus(_T("Process %ld (%s) launched."), m_pidLast, cmd.c_str());
 675
 676         m_cmdLast = cmd;
 677
 678         // the parent frame keeps track of all async processes as it needs to
 679         // free them if we exit before the child process terminates
 680         AddAsyncProcess(process);
 681     }
 682 }
 683
 684 void MyFrame::OnSyncExec(wxCommandEvent& WXUNUSED(event))
 685 {
 686     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 687                                      DIALOG_TITLE,
 688                                      m_cmdLast);
 689
 690     if ( !cmd )
 691         return;
 692
 693     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 694
 695     int code = wxExecute(cmd, wxEXEC_SYNC);
 696
 697     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 698         cmd.c_str(), code);
 699
 700     m_cmdLast = cmd;
 701 }
 702
 703 void MyFrame::OnSyncNoEventsExec(wxCommandEvent& WXUNUSED(event))
 704 {
 705     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 706                                      DIALOG_TITLE,
 707                                      m_cmdLast);
 708
 709     if ( !cmd )
 710         return;
 711
 712     wxLogStatus( _T("'%s' is running please wait..."), cmd.c_str() );
 713
 714     int code = wxExecute(cmd, wxEXEC_BLOCK);
 715
 716     wxLogStatus(_T("Process '%s' terminated with exit code %d."),
 717         cmd.c_str(), code);
 718
 719     m_cmdLast = cmd;
 720 }
 721
 722 void MyFrame::OnAsyncExec(wxCommandEvent& WXUNUSED(event))
 723 {
 724     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 725                                      DIALOG_TITLE,
 726                                      m_cmdLast);
 727
 728     if ( !cmd )
 729         return;
 730
 731     DoAsyncExec(cmd);
 732 }
 733
 734 void MyFrame::OnShell(wxCommandEvent& WXUNUSED(event))
 735 {
 736     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 737                                      DIALOG_TITLE,
 738                                      m_cmdLast);
 739
 740     if ( !cmd )
 741         return;
 742
 743     int code = wxShell(cmd);
 744     wxLogStatus(_T("Shell command '%s' terminated with exit code %d."),
 745                 cmd.c_str(), code);
 746     m_cmdLast = cmd;
 747 }
 748
 749 void MyFrame::OnExecWithRedirect(wxCommandEvent& WXUNUSED(event))
 750 {
 751     if ( !m_cmdLast )
 752     {
 753 #ifdef __WXMSW__
 754         m_cmdLast = "type Makefile.in";
 755 #else
 756         m_cmdLast = "cat -n Makefile";
 757 #endif
 758     }
 759
 760     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 761                                      DIALOG_TITLE,
 762                                      m_cmdLast);
 763
 764     if ( !cmd )
 765         return;
 766
 767     bool sync;
 768     switch ( wxMessageBox(_T("Execute it synchronously?"),
 769                           _T("Exec question"),
 770                           wxYES_NO | wxCANCEL | wxICON_QUESTION, this) )
 771     {
 772         case wxYES:
 773             sync = true;
 774             break;
 775
 776         case wxNO:
 777             sync = false;
 778             break;
 779
 780         default:
 781             return;
 782     }
 783
 784     if ( sync )
 785     {
 786         wxLogStatus("\"%s\" is running please wait...", cmd);
 787
 788         wxStopWatch sw;
 789
 790         wxArrayString output, errors;
 791         int code = wxExecute(cmd, output, errors);
 792
 793         wxLogStatus("Command \"%s\" terminated after %ldms; exit code %d.",
 794                     cmd, sw.Time(), code);
 795
 796         if ( code != -1 )
 797         {
 798             ShowOutput(cmd, output, _T("Output"));
 799             ShowOutput(cmd, errors, _T("Errors"));
 800         }
 801     }
 802     else // async exec
 803     {
 804         MyPipedProcess *process = new MyPipedProcess(this, cmd);
 805         if ( !wxExecute(cmd, wxEXEC_ASYNC, process) )
 806         {
 807             wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 808
 809             delete process;
 810         }
 811         else
 812         {
 813             AddPipedProcess(process);
 814         }
 815     }
 816
 817     m_cmdLast = cmd;
 818 }
 819
 820 void MyFrame::OnExecWithPipe(wxCommandEvent& WXUNUSED(event))
 821 {
 822     if ( !m_cmdLast )
 823         m_cmdLast = _T("tr [a-z] [A-Z]");
 824
 825     wxString cmd = wxGetTextFromUser(_T("Enter the command: "),
 826                                      DIALOG_TITLE,
 827                                      m_cmdLast);
 828
 829     if ( !cmd )
 830         return;
 831
 832     wxString input = wxGetTextFromUser(_T("Enter the string to send to it: "),
 833                                        DIALOG_TITLE);
 834     if ( !input )
 835         return;
 836
 837     // always execute the filter asynchronously
 838     MyPipedProcess2 *process = new MyPipedProcess2(this, cmd, input);
 839     long pid = wxExecute(cmd, wxEXEC_ASYNC, process);
 840     if ( pid )
 841     {
 842         wxLogStatus(_T("Process %ld (%s) launched."), pid, cmd.c_str());
 843
 844         AddPipedProcess(process);
 845     }
 846     else
 847     {
 848         wxLogError(_T("Execution of '%s' failed."), cmd.c_str());
 849
 850         delete process;
 851     }
 852
 853     m_cmdLast = cmd;
 854 }
 855
 856 void MyFrame::OnPOpen(wxCommandEvent& WXUNUSED(event))
 857 {
 858     wxString cmd = wxGetTextFromUser(_T("Enter the command to launch: "),
 859                                      DIALOG_TITLE,
 860                                      m_cmdLast);
 861     if ( cmd.empty() )
 862         return;
 863
 864     wxProcess *process = wxProcess::Open(cmd);
 865     if ( !process )
 866     {
 867         wxLogError(_T("Failed to launch the command."));
 868         return;
 869     }
 870
 871     wxLogVerbose(_T("PID of the new process: %ld"), process->GetPid());
 872
 873     wxOutputStream *out = process->GetOutputStream();
 874     if ( !out )
 875     {
 876         wxLogError(_T("Failed to connect to child stdin"));
 877         return;
 878     }
 879
 880     wxInputStream *in = process->GetInputStream();
 881     if ( !in )
 882     {
 883         wxLogError(_T("Failed to connect to child stdout"));
 884         return;
 885     }
 886
 887     new MyPipeFrame(this, cmd, process);
 888 }
 889
 890 static wxString gs_lastFile;
 891
 892 static bool AskUserForFileName()
 893 {
 894     wxString filename;
 895
 896 #if wxUSE_FILEDLG
 897     filename = wxLoadFileSelector(_T("any"), wxEmptyString, gs_lastFile);
 898 #else // !wxUSE_FILEDLG
 899     filename = wxGetTextFromUser(_T("Enter the file name"), _T("exec sample"),
 900                                  gs_lastFile);
 901 #endif // wxUSE_FILEDLG/!wxUSE_FILEDLG
 902
 903     if ( filename.empty() )
 904         return false;
 905
 906     gs_lastFile = filename;
 907
 908     return true;
 909 }
 910
 911 void MyFrame::OnFileExec(wxCommandEvent& WXUNUSED(event))
 912 {
 913     if ( !AskUserForFileName() )
 914         return;
 915
 916     wxString ext = gs_lastFile.AfterLast(_T('.'));
 917     wxFileType *ft = wxTheMimeTypesManager->GetFileTypeFromExtension(ext);
 918     if ( !ft )
 919     {
 920         wxLogError(_T("Impossible to determine the file type for extension '%s'"),
 921                    ext.c_str());
 922         return;
 923     }
 924
 925     wxString cmd;
 926     bool ok = ft->GetOpenCommand(&cmd,
 927                                  wxFileType::MessageParameters(gs_lastFile));
 928     delete ft;
 929     if ( !ok )
 930     {
 931         wxLogError(_T("Impossible to find out how to open files of extension '%s'"),
 932                    ext.c_str());
 933         return;
 934     }
 935
 936     DoAsyncExec(cmd);
 937 }
 938
 939 void MyFrame::OnFileLaunch(wxCommandEvent& WXUNUSED(event))
 940 {
 941     if ( !AskUserForFileName() )
 942         return;
 943
 944     if ( !wxLaunchDefaultApplication(gs_lastFile) )
 945     {
 946         wxLogError("Opening \"%s\" in default application failed.", gs_lastFile);
 947     }
 948 }
 949
 950 void MyFrame::OnOpenURL(wxCommandEvent& WXUNUSED(event))
 951 {
 952     static wxString s_url(_T("http://www.wxwidgets.org/"));
 953
 954     wxString filename = wxGetTextFromUser
 955                         (
 956                             _T("Enter the URL"),
 957                             _T("exec sample"),
 958                             s_url,
 959                             this
 960                         );
 961
 962     if ( filename.empty() )
 963         return;
 964
 965     s_url = filename;
 966
 967     if ( !wxLaunchDefaultBrowser(s_url) )
 968         wxLogError(_T("Failed to open URL \"%s\""), s_url.c_str());
 969 }
 970
 971 // ----------------------------------------------------------------------------
 972 // DDE stuff
 973 // ----------------------------------------------------------------------------
 974
 975 #ifdef __WINDOWS__
 976
 977 bool MyFrame::GetDDEServer()
 978 {
 979     wxString server = wxGetTextFromUser(_T("Server to connect to:"),
 980                                         DIALOG_TITLE, m_server);
 981     if ( !server )
 982         return false;
 983
 984     m_server = server;
 985
 986     wxString topic = wxGetTextFromUser(_T("DDE topic:"), DIALOG_TITLE, m_topic);
 987     if ( !topic )
 988         return false;
 989
 990     m_topic = topic;
 991
 992     wxString cmd = wxGetTextFromUser(_T("DDE command:"), DIALOG_TITLE, m_cmdDde);
 993     if ( !cmd )
 994         return false;
 995
 996     m_cmdDde = cmd;
 997
 998     return true;
 999 }
1000
1001 void MyFrame::OnDDEExec(wxCommandEvent& WXUNUSED(event))
1002 {
1003     if ( !GetDDEServer() )
1004         return;
1005
1006     wxDDEClient client;
1007     wxConnectionBase *conn = client.MakeConnection(wxEmptyString, m_server, m_topic);
1008     if ( !conn )
1009     {
1010         wxLogError(_T("Failed to connect to the DDE server '%s'."),
1011                    m_server.c_str());
1012     }
1013     else
1014     {
1015         if ( !conn->Execute(m_cmdDde) )
1016         {
1017             wxLogError(_T("Failed to execute command '%s' via DDE."),
1018                        m_cmdDde.c_str());
1019         }
1020         else
1021         {
1022             wxLogStatus(_T("Successfully executed DDE command"));
1023         }
1024     }
1025 }
1026
1027 void MyFrame::OnDDERequest(wxCommandEvent& WXUNUSED(event))
1028 {
1029     if ( !GetDDEServer() )
1030         return;
1031
1032     wxDDEClient client;
1033     wxConnectionBase *conn = client.MakeConnection(wxEmptyString, m_server, m_topic);
1034     if ( !conn )
1035     {
1036         wxLogError(_T("Failed to connect to the DDE server '%s'."),
1037                    m_server.c_str());
1038     }
1039     else
1040     {
1041         if ( !conn->Request(m_cmdDde) )
1042         {
1043             wxLogError(_T("Failed to  send request '%s' via DDE."),
1044                        m_cmdDde.c_str());
1045         }
1046         else
1047         {
1048             wxLogStatus(_T("Successfully sent DDE request."));
1049         }
1050     }
1051 }
1052
1053 #endif // __WINDOWS__
1054
1055 // ----------------------------------------------------------------------------
1056 // various helpers
1057 // ----------------------------------------------------------------------------
1058
1059 // input polling
1060 void MyFrame::OnIdle(wxIdleEvent& event)
1061 {
1062     size_t count = m_running.GetCount();
1063     for ( size_t n = 0; n < count; n++ )
1064     {
1065         if ( m_running[n]->HasInput() )
1066         {
1067             event.RequestMore();
1068         }
1069     }
1070 }
1071
1072 void MyFrame::OnIdleTimer(wxTimerEvent& WXUNUSED(event))
1073 {
1074     wxWakeUpIdle();
1075 }
1076
1077 void MyFrame::OnBgTimer(wxTimerEvent& WXUNUSED(event))
1078 {
1079     static unsigned long s_ticks = 0;
1080     SetStatusText(wxString::Format("%lu ticks", s_ticks++), 1);
1081 }
1082
1083 void MyFrame::OnProcessTerminated(MyPipedProcess *process)
1084 {
1085     RemovePipedProcess(process);
1086 }
1087
1088 void MyFrame::OnAsyncTermination(MyProcess *process)
1089 {
1090     m_allAsync.Remove(process);
1091
1092     delete process;
1093 }
1094
1095 void MyFrame::AddPipedProcess(MyPipedProcess *process)
1096 {
1097     if ( m_running.IsEmpty() )
1098     {
1099         // we want to start getting the timer events to ensure that a
1100         // steady stream of idle events comes in -- otherwise we
1101         // wouldn't be able to poll the child process input
1102         m_timerIdleWakeUp.Start(100);
1103     }
1104     //else: the timer is already running
1105
1106     m_running.Add(process);
1107     m_allAsync.Add(process);
1108 }
1109
1110 void MyFrame::RemovePipedProcess(MyPipedProcess *process)
1111 {
1112     m_running.Remove(process);
1113
1114     if ( m_running.IsEmpty() )
1115     {
1116         // we don't need to get idle events all the time any more
1117         m_timerIdleWakeUp.Stop();
1118     }
1119 }
1120
1121 void MyFrame::ShowOutput(const wxString& cmd,
1122                          const wxArrayString& output,
1123                          const wxString& title)
1124 {
1125     size_t count = output.GetCount();
1126     if ( !count )
1127         return;
1128
1129     m_lbox->Append(wxString::Format(_T("--- %s of '%s' ---"),
1130                                     title.c_str(), cmd.c_str()));
1131
1132     for ( size_t n = 0; n < count; n++ )
1133     {
1134         m_lbox->Append(output[n]);
1135     }
1136
1137     m_lbox->Append(wxString::Format(_T("--- End of %s ---"),
1138                                     title.Lower().c_str()));
1139 }
1140
1141 // ----------------------------------------------------------------------------
1142 // MyProcess
1143 // ----------------------------------------------------------------------------
1144
1145 void MyProcess::OnTerminate(int pid, int status)
1146 {
1147     wxLogStatus(m_parent, _T("Process %u ('%s') terminated with exit code %d."),
1148                 pid, m_cmd.c_str(), status);
1149
1150     m_parent->OnAsyncTermination(this);
1151 }
1152
1153 // ----------------------------------------------------------------------------
1154 // MyPipedProcess
1155 // ----------------------------------------------------------------------------
1156
1157 bool MyPipedProcess::HasInput()
1158 {
1159     bool hasInput = false;
1160
1161     if ( IsInputAvailable() )
1162     {
1163         wxTextInputStream tis(*GetInputStream());
1164
1165         // this assumes that the output is always line buffered
1166         wxString msg;
1167         msg << m_cmd << _T(" (stdout): ") << tis.ReadLine();
1168
1169         m_parent->GetLogListBox()->Append(msg);
1170
1171         hasInput = true;
1172     }
1173
1174     if ( IsErrorAvailable() )
1175     {
1176         wxTextInputStream tis(*GetErrorStream());
1177
1178         // this assumes that the output is always line buffered
1179         wxString msg;
1180         msg << m_cmd << _T(" (stderr): ") << tis.ReadLine();
1181
1182         m_parent->GetLogListBox()->Append(msg);
1183
1184         hasInput = true;
1185     }
1186
1187     return hasInput;
1188 }
1189
1190 void MyPipedProcess::OnTerminate(int pid, int status)
1191 {
1192     // show the rest of the output
1193     while ( HasInput() )
1194         ;
1195
1196     m_parent->OnProcessTerminated(this);
1197
1198     MyProcess::OnTerminate(pid, status);
1199 }
1200
1201 // ----------------------------------------------------------------------------
1202 // MyPipedProcess2
1203 // ----------------------------------------------------------------------------
1204
1205 bool MyPipedProcess2::HasInput()
1206 {
1207     if ( !m_input.empty() )
1208     {
1209         wxTextOutputStream os(*GetOutputStream());
1210         os.WriteString(m_input);
1211
1212         CloseOutput();
1213         m_input.clear();
1214
1215         // call us once again - may be we'll have output
1216         return true;
1217     }
1218
1219     return MyPipedProcess::HasInput();
1220 }
1221
1222 // ============================================================================
1223 // MyPipeFrame implementation
1224 // ============================================================================
1225
1226 MyPipeFrame::MyPipeFrame(wxFrame *parent,
1227                          const wxString& cmd,
1228                          wxProcess *process)
1229            : wxFrame(parent, wxID_ANY, cmd),
1230              m_process(process),
1231              // in a real program we'd check that the streams are !NULL here
1232              m_out(*process->GetOutputStream()),
1233              m_in(*process->GetInputStream()),
1234              m_err(*process->GetErrorStream())
1235 {
1236     m_process->SetNextHandler(this);
1237
1238     wxPanel *panel = new wxPanel(this, wxID_ANY);
1239
1240     m_textOut = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1241                               wxDefaultPosition, wxDefaultSize,
1242                               wxTE_PROCESS_ENTER);
1243     m_textIn = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1244                                wxDefaultPosition, wxDefaultSize,
1245                                wxTE_MULTILINE | wxTE_RICH);
1246     m_textIn->SetEditable(false);
1247     m_textErr = new wxTextCtrl(panel, wxID_ANY, wxEmptyString,
1248                                wxDefaultPosition, wxDefaultSize,
1249                                wxTE_MULTILINE | wxTE_RICH);
1250     m_textErr->SetEditable(false);
1251
1252     wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL);
1253     sizerTop->Add(m_textOut, 0, wxGROW | wxALL, 5);
1254
1255     wxSizer *sizerBtns = new wxBoxSizer(wxHORIZONTAL);
1256     sizerBtns->
1257         Add(new wxButton(panel, Exec_Btn_Send, _T("&Send")), 0, wxALL, 5);
1258     sizerBtns->
1259         Add(new wxButton(panel, Exec_Btn_SendFile, _T("&File...")), 0, wxALL, 5);
1260     sizerBtns->
1261         Add(new wxButton(panel, Exec_Btn_Get, _T("&Get")), 0, wxALL, 5);
1262     sizerBtns->
1263         Add(new wxButton(panel, Exec_Btn_Close, _T("&Close")), 0, wxALL, 5);
1264
1265     sizerTop->Add(sizerBtns, 0, wxCENTRE | wxALL, 5);
1266     sizerTop->Add(m_textIn, 1, wxGROW | wxALL, 5);
1267     sizerTop->Add(m_textErr, 1, wxGROW | wxALL, 5);
1268
1269     panel->SetSizer(sizerTop);
1270     sizerTop->Fit(this);
1271
1272     Show();
1273 }
1274
1275 void MyPipeFrame::OnBtnSendFile(wxCommandEvent& WXUNUSED(event))
1276 {
1277 #if wxUSE_FILEDLG
1278     wxFileDialog filedlg(this, _T("Select file to send"));
1279     if ( filedlg.ShowModal() != wxID_OK )
1280         return;
1281
1282     wxFFile file(filedlg.GetFilename(), _T("r"));
1283     wxString data;
1284     if ( !file.IsOpened() || !file.ReadAll(&data) )
1285         return;
1286
1287     // can't write the entire string at once, this risk overflowing the pipe
1288     // and we would dead lock
1289     size_t len = data.length();
1290     const wxChar *pc = data.c_str();
1291     while ( len )
1292     {
1293         const size_t CHUNK_SIZE = 4096;
1294         m_out.Write(pc, len > CHUNK_SIZE ? CHUNK_SIZE : len);
1295
1296         // note that not all data could have been written as we don't block on
1297         // the write end of the pipe
1298         const size_t lenChunk = m_out.LastWrite();
1299
1300         pc += lenChunk;
1301         len -= lenChunk;
1302
1303         DoGet();
1304     }
1305 #endif // wxUSE_FILEDLG
1306 }
1307
1308 void MyPipeFrame::DoGet()
1309 {
1310     // we don't have any way to be notified when any input appears on the
1311     // stream so we have to poll it :-(
1312     DoGetFromStream(m_textIn, m_in);
1313     DoGetFromStream(m_textErr, m_err);
1314 }
1315
1316 void MyPipeFrame::DoGetFromStream(wxTextCtrl *text, wxInputStream& in)
1317 {
1318     while ( in.CanRead() )
1319     {
1320         wxChar buffer[4096];
1321         buffer[in.Read(buffer, WXSIZEOF(buffer) - 1).LastRead()] = _T('\0');
1322
1323         text->AppendText(buffer);
1324     }
1325 }
1326
1327 void MyPipeFrame::DoClose()
1328 {
1329     m_process->CloseOutput();
1330
1331     DisableInput();
1332 }
1333
1334 void MyPipeFrame::DisableInput()
1335 {
1336     m_textOut->SetEditable(false);
1337     FindWindow(Exec_Btn_Send)->Disable();
1338     FindWindow(Exec_Btn_SendFile)->Disable();
1339     FindWindow(Exec_Btn_Close)->Disable();
1340 }
1341
1342 void MyPipeFrame::DisableOutput()
1343 {
1344     FindWindow(Exec_Btn_Get)->Disable();
1345 }
1346
1347 void MyPipeFrame::OnClose(wxCloseEvent& event)
1348 {
1349     if ( m_process )
1350     {
1351         // we're not interested in getting the process termination notification
1352         // if we are closing it ourselves
1353         wxProcess *process = m_process;
1354         m_process = NULL;
1355         process->SetNextHandler(NULL);
1356
1357         process->CloseOutput();
1358     }
1359
1360     event.Skip();
1361 }
1362
1363 void MyPipeFrame::OnProcessTerm(wxProcessEvent& WXUNUSED(event))
1364 {
1365     DoGet();
1366
1367     delete m_process;
1368     m_process = NULL;
1369
1370     wxLogWarning(_T("The other process has terminated, closing"));
1371
1372     DisableInput();
1373     DisableOutput();
1374 }