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Thread: Restart a program

  1. #1
    Join Date
    Apr 2011
    Posts
    1

    Restart a program

    hi all,
    i have a basic c++ knowledge and was wondering how to restart a process if crashed or ended.
    for example i want a virtualbox run in the background this is what i have so far
    Code:
    #include <windows.h>
    #include <iostream>
    using namespace std;
    
    
    int main()
    {
        const char* app = "virtualbox.exe";
    
       ShellExecute(GetDesktopWindow(), "open", app, "--startvm \"OpenSuseServer\"", "c:\\program files\\oracle\\virtualbox", SW_HIDE);
    
        for (int i = 1; i > 0; i++)
        {
            Sleep(6000000);
        }
    
    }
    im thinking maybe a basic loop that checks the process[virtualbox.exe] to see if its still alive or not if not recall the same shellex command..
    i have done some searching about getting the pid and check it to see if its still active butevery sample code i have gotten from the web didnt compile properly and a little confusing..

    any help would be appreciated.. my comipler is GNU compiler using Code:Blocks..
    thankx

  2. #2
    Join Date
    Oct 2006
    Location
    Sweden
    Posts
    3,651

    Re: Restart a program

    Here's a (I hope) better example http://msdn.microsoft.com/en-us/libr...(v=VS.85).aspx to base your loop on.
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  3. #3
    Join Date
    May 2005
    Posts
    4,954

    Re: Restart a program

    As suggested you can use the:
    ::CreateProcess()

    Save the process handle and in the loop you can call the:
    ::GetExitCodeProcess()

    And check the lpExitCode code to see if its STILL_ACTIVE.

    But what will you do if someone will kill your watchdog program?

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  4. #4
    Join Date
    Feb 2003
    Location
    Iasi - Romania
    Posts
    8,207

    Re: Restart a program

    Quote Originally Posted by golanshahar View Post
    Save the process handle and in the loop you can call the:
    ::GetExitCodeProcess()
    Much better is to use WaitForSingleObject. This avoids a little cute bug in case that watched process exits with the code 259 (STILL_ACTIVE ).
    Last edited by ovidiucucu; April 21st, 2011 at 07:17 AM.
    Ovidiu
    "When in Rome, do as Romans do."
    My latest articles: http://codexpert.ro/blog/author/ovidiu-cucu/

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