About ::ExitWindowsEx

Question

// Shutdown.cpp#include "stdafx.h"
#include "Shutdown.h"int APIENTRY _tWinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPTSTR    lpCmdLine,
                     int       nCmdShow)
{
ExitWindowsEx(EWX_REBOOT, EWX_FORCE);
return 0;
}不能重启系统，为什么？

Answer 1

TOKEN_PRIVILEGES tkp,tkpnewbutignored;
HANDLE hdltokenhandle;
LUID tmpluid;
BOOL rc;
DWORD lbufferneeded;
HANDLE  hdlprocesshandle = GetCurrentProcess();
rc = OpenProcessToken(hdlprocesshandle,
        TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &hdltokenhandle);
rc = LookupPrivilegeValue("","SeShutdownPrivilege", &tmpluid);
tkp.PrivilegeCount = 1; // one privilege to set
tkp.Privileges[0].Luid = tmpluid;
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
rc = AdjustTokenPrivileges(hdltokenhandle,FALSE,
        &tkp,sizeof(tkpnewbutignored),&tkpnewbutignored, &lbufferneeded);
ExitWindowsEx(EWX_REBOOT, EWX_FORCE);

Answer 2

为了关闭或重起系统，必须先调用AdjustTokenPrivileges（）函数来是SE_SHUTDOWN_NAME权限有效，webber84(***闭关修炼中***)写的就是这个意思！
另外在win98/me中，ExitWindowEx不能在Console application中使用。

Answer 3

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
     // TODO: Place code here.
    TOKEN_PRIVILEGES tkp,tkpnewbutignored;
    HANDLE hdltokenhandle;
    LUID tmpluid;
    BOOL rc;
    DWORD lbufferneeded;
    HANDLE  hdlprocesshandle = GetCurrentProcess();
    rc = OpenProcessToken(hdlprocesshandle,TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &hdltokenhandle);
    rc = LookupPrivilegeValue("","SeShutdownPrivilege", &tmpluid);
    tkp.PrivilegeCount = 1; // one privilege to set
    tkp.Privileges[0].Luid = tmpluid;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
    rc = AdjustTokenPrivileges(hdltokenhandle,FALSE,&tkp,sizeof(tkpnewbutignored),&tkpnewbutignored, &lbufferneeded);
    ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE,  0);
    return 0;
}

Answer 4

void ShutDown()
{    if  (dwVersion  <    0x80000000)
    {
    TOKEN_PRIVILEGES tkp,tkpnewbutignored;
    HANDLE hdltokenhandle;
    LUID tmpluid;
    BOOL rc;
    DWORD lbufferneeded;
    HANDLE  hdlprocesshandle = GetCurrentProcess();
    rc = OpenProcessToken(hdlprocesshandle,TOKEN_ADJUST_PRIVILEGES|TOKEN_QUERY, &hdltokenhandle);
    rc = LookupPrivilegeValue("","SeShutdownPrivilege", &tmpluid);
    tkp.PrivilegeCount = 1; // one privilege to set
    tkp.Privileges[0].Luid = tmpluid;
    tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;
    rc = AdjustTokenPrivileges(hdltokenhandle,FALSE,&tkp,sizeof(tkpnewbutignored),&tkpnewbutignored, &lbufferneeded);
    ExitWindowsEx(EWX_SHUTDOWN|EWX_FORCE,  0);
    }
    else
    {
    ExitWindowsEx(EWX_SHUTDOWN,0);
    }
}