TerminateJobObject是使用

注意: AssignProcessToJobObject仅适用于win32 desktop app， 比如notepad是适用的，calculator是不适用的

下面的demo是将notepad的句柄分配给作业，然后由TerminateJobObject统一kill

#define _CRT_SECURE_NO_WARNINGS

#include<iostream>
#include<windows.h>
using namespace std;

bool ExecuteSoftware(HANDLE * hSoftwareJob, char * name, const int countExecute);
void KillProcess(HANDLE hSoftwareJob);
int main()
{
    HANDLE notepadJob;
    const int SIZE_NOTE = 3;
    notepadJob = CreateJobObject(NULL, NULL);
    
    cout << "Execute WordPad\n";
    if (!ExecuteSoftware(&notepadJob, const_cast<char*>("notepad.exe"), SIZE_NOTE))
    {
        cout << "Can't execute all process\n";
        Sleep(1500);
    }



    cout << "Killing groups\n";

    KillProcess(notepadJob);


    Sleep(2500);

    return 0;
}

bool ExecuteSoftware(HANDLE * hSoftwareJob, char * name, const int countExecute)
{
    STARTUPINFO si;
    LPTSTR lpszSystemInfo;
    PROCESS_INFORMATION pi;
    TCHAR tchBuff[MAX_PATH + 1];

    lpszSystemInfo = tchBuff;
    GetSystemDirectory(lpszSystemInfo, MAX_PATH + 1);
    wsprintf(tchBuff, "%s\\%s", lpszSystemInfo, name);

    ZeroMemory(&si, sizeof(si));
    si.cb = sizeof(si);
    ZeroMemory(&pi, sizeof(pi));

    for (int i = 0; i < countExecute; i++)
    {
        if (!CreateProcess(NULL, tchBuff, NULL, NULL, FALSE, CREATE_BREAKAWAY_FROM_JOB, NULL, NULL, &si, &pi)) //CREATE_BREAKAWAY_FROM_JOB是必需的
        {
            return false;
        }
        else
        {
            AssignProcessToJobObject(*hSoftwareJob, pi.hProcess);
            int err = GetLastError();
        }
    }

    return true;
}


void KillProcess(HANDLE hSoftwareJob)
{
    TerminateJobObject(hSoftwareJob, 0);
    int err = GetLastError();
}

有意思的是如果使用openprocess获取计算器的句柄，然后将句柄传递给AssignProcessToJobObject，同样也可以被TerminateJobObject杀掉进程。 

不过测试之后发现createprocess得到的processid与任务管理器中看到的pid不一样，也就是如果createprocess得到的Pid传给openprocess之后，获取的新句柄将无法使用。