Tests whether wxProcess::OnTerminate() is called when the process is killed

test-wxprocess-onterminate2.cpp

#include <wx/wx.h>
#include <wx/process.h>

class MyProcess : public wxProcess
{
public:
    void OnTerminate(int pid, int status) override
    {
        wxLogMessage("MyProcess::OnTerminate(): pid = %d, status = %d", pid, status);
    }
};

class MyFrame : public wxFrame
{
public:
    MyFrame() : wxFrame(nullptr, wxID_ANY, "Test")
    {
        wxPanel* mainPanel = new wxPanel(this);
        wxSizer* mainPanelSizer = new wxBoxSizer(wxVERTICAL);

        m_startButton = new wxButton(mainPanel, wxID_ANY, "Start process...");
        mainPanelSizer->Add(m_startButton, wxSizerFlags().Expand().Border());

        wxTextCtrl* logCtrl = new wxTextCtrl(mainPanel, wxID_ANY, wxEmptyString,
            wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE | wxTE_READONLY | wxTE_RICH2);
        wxLog::SetActiveTarget(new wxLogTextCtrl(logCtrl));
        wxLog::DisableTimestamp();
        mainPanelSizer->Add(logCtrl, wxSizerFlags().Proportion(1).Expand().Border());

        m_timer.SetOwner(this);
        Bind(wxEVT_BUTTON, &MyFrame::OnStartProcess, this);
        Bind(wxEVT_TIMER, &MyFrame::OnKillProcessTimer, this);

        SetClientSize(800, 600);
        SetSizer(mainPanelSizer);
    }
private:
    wxButton* m_startButton;
    MyProcess m_process;
    wxTimer   m_timer;
    wxString  m_command{"cmd"};

    void OnStartProcess(wxCommandEvent&)
    {
        wxString command = wxGetTextFromUser("Enter command to execute", "Execute", m_command);

        if ( command.empty() )
            return;

        m_command = command;

        if ( wxExecute(m_command, wxEXEC_ASYNC  | wxEXEC_MAKE_GROUP_LEADER, &m_process) )
        {
            wxLogMessage("Process '%s' with pid %ld will be killed in 3 sec.", m_command, m_process.GetPid());
            m_timer.StartOnce(3000);
            m_startButton->Disable();
        }
    }

    void OnKillProcessTimer(wxTimerEvent&)
    {
        wxSignal sig = wxSIGTERM;

        if ( wxMessageBox("Press 'Yes' to use wxSIGTERM, 'No' to use wxSIGKILL.", "Select", wxYES_NO) != wxYES )
            sig = wxSIGKILL;

        wxLogMessage("Attempting to kill '%s' with %s.", m_command, sig == wxSIGKILL ? "wxSIGKILL" : "wxSIGTERM");

        const wxKillError killResult = wxProcess::Kill(m_process.GetPid(), sig);

        if ( killResult == wxKILL_OK )
        {
            wxLogMessage("Process killed successfully.");
        }
        else
        {
            wxString killResultString;

            switch ( killResult )
            {
                case wxKILL_BAD_SIGNAL:
                    killResultString = "wxKILL_BAD_SIGNAL";
                    break;
                case wxKILL_ACCESS_DENIED:
                    killResultString = "wxKILL_ACCESS_DENIED";
                    break;
                case wxKILL_NO_PROCESS:
                    killResultString = "wxKILL_NO_PROCESS";
                    break;
                default:
                    killResultString = "wxKILL_ERROR";
            }

            wxLogError("Could not kill the process, wxProcess::Kill() returned %s.", killResultString);
        }

        m_startButton->Enable();
    }
};

class MyApp : public wxApp
{
    bool OnInit() override
    {
        (new MyFrame)->Show();
        return true;
    }
}; wxIMPLEMENT_APP(MyApp);