Re: Apache Control : Starting and Stopping Apache from foreign application

Foo JH <jhfoo-ml@xxxxxxxxxxxxxx> · Fri, 19 Sep 2008 16:43:19 +0800

If all you wand to do is start and stop the Apache service, why don't 

you simply do the following on the command line:

net start Apache2
net stop Apache2

Asif M wrote:

Hi all,

I have the following problem :-

I wrote a Apache Control Program in Visual Studio 2003, which does the 

following

1>. Starts Apache with CreateProcess Call. I run Apache on the command 

interpreter but not as a service.

2>. Redirects all standard input / output of Apache to the Apache 

Control Program so that the Apache cmd-line output actually appears in 

the log window of the control program

3>. Stops Apache

#3 has some problem.
When I try to stop Apache, I try the following

1>. Send a control-C control event to the process the CreateProcess call 

returns

2>. Close the input pipe which I passed on to Apache during the 

CreateProcess

3>. Do an TerminateProcess on the process id returned by the 

CreateProcess call

When I run Apache from the command line, a ctrl+c stops both the running 

httpd process. However programmatically #1 does not have any effect. It 

feels that Apache has not received the Ctrl+C I send.

#2 does not have any impact on the running Apache Process either

#3 only kills the primary httpd process running. It does not kill the 

second process.

Here is the code excerpt :-

/////////////  STARTING APACHE //////////////////////
_tcscpy(_pszCmdLine,m_szApacheBaseDir);
    _tcscat(_pszCmdLine,_T("\\bin\\httpd.exe"));
    _tcscat(_pszCmdLine,_T(" -f "));
    _tcscat(_pszCmdLine,m_szApacheCfgFile);
    _tcscat(_pszCmdLine,_T(" -e debug"));

//..  code to create input/output/error pipes and replicate the handles 

in the si structure

if (!::CreateProcess(
        NULL,
        (LPTSTR)pszCmdLine,
        NULL, NULL,
        TRUE,
        CREATE_NEW_CONSOLE | CREATE_NEW_PROCESS_GROUP,
        NULL, NULL,
        &si,
        &pi))
    {
        int n = GetLastError();
        return FALSE;
    }

///////////////////// STOPPING APACHE ///////////////////////
    int j = _tcslen(ctrlC);
    WriteFile(m_hStdinWrite, (LPCTSTR)ctrlC,2, &dwWritten, NULL);

    if ( !GenerateConsoleCtrlEvent(CTRL_C_EVENT,m_dwProcessGroupId))

        j = GetLastError();

    CloseHandle(m_hStdinWrite);
    CloseHandle(m_hStdinRead);

    if (m_dwProcessGroupId)
    {

        _hProcessHandle = 

OpenProcess(PROCESS_ALL_ACCESS,FALSE,m_dwProcessGroupId);

        if (_hProcessHandle)
        {
            GetExitCodeProcess(_hProcessHandle,&_dwExitCode);
            int n = GetLastError();
            TerminateProcess(_hProcessHandle,1);
        }
        int n = GetLastError();
    }

I would like to know how to send a Ctrl+C event to apache so that I can 

cleanly / gracefully shutdown Apache.

Any pointers will be extremely appreciated?

Thanks in Advance,
Asif

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