感谢 IInspectable 的建议(请参阅他的评论……非常感谢!)我创建了一个函数来解决我的问题!我将在这里分享这个功能,它可能对遇到相同(或类似)问题的其他人有用。
根据我的需要,该函数接收要卸载的项目的索引作为参数(来自 QList)并获取卸载字符串(例如:C:\ProgramFiles\MyApp\uninstall.exe)。
然后使用这个卸载字符串,我将创建一个进程(CreateProcess)并将它的句柄放入一个作业对象中,这样我的函数就会等待这个进程运行的所有进程。
函数本身非常简单,可以改进。
请注意,必须使用 CREATE_BREAKAWAY_FROM_JOB 选项创建进程,否则 AssignProcessToJobObject 将失败并出现“拒绝访问”错误。
void MainWindow::uniButtonClick(int idx)
{
QMessageBox::StandardButton reply;
QMessageBox::StandardButton err;
reply = QMessageBox::question(this, "Uninstall/Change", "Uninstall " +
ip[idx].displayName +"?\r\n\r\n" + ip[idx].uninstallString,
QMessageBox::Yes|QMessageBox::No);
if (reply == QMessageBox::Yes)
{
//QString s = "C:\\windows\\notepad.exe"; // Just to test Job assignment and createprocess
QString s = ip[idx].uninstallString; // the real uninstaller string
QString jobName = "MyJobObject";
try
{
PROCESS_INFORMATION ProcessInfo; //This is what we get as an [out] parameter
STARTUPINFO StartupInfo; //This is an [in] parameter
PJOBOBJECT_BASIC_PROCESS_ID_LIST pList;
HANDLE hProcess;
BOOL bJobAllEnd;
ZeroMemory(&StartupInfo, sizeof(StartupInfo));
StartupInfo.cb = sizeof StartupInfo ; //Only compulsory field
wchar_t* path;
path = (wchar_t*) malloc (sizeof(wchar_t)*s.length()+1);
s.toWCharArray(path);
path[s.length()]=0; // Null terminate the string
// Create the process with CREATE_BREAKAWAY_FROM_JOB to overcome the AccessDenied issue on AssignProcessToJobObject.
if(CreateProcess(NULL, path, NULL, NULL, FALSE, CREATE_BREAKAWAY_FROM_JOB|CREATE_SUSPENDED, NULL, NULL,&StartupInfo, &ProcessInfo))
{
pList = (PJOBOBJECT_BASIC_PROCESS_ID_LIST)GlobalAlloc(GMEM_FIXED, 10000);
HANDLE jobObj = CreateJobObject(NULL, (const wchar_t*)jobName.utf16());
if (AssignProcessToJobObject(jobObj, ProcessInfo.hProcess) != 0)
{
ResumeThread(ProcessInfo.hThread); // Process assigned to JobObjext, resume it now
do
{
QueryInformationJobObject(jobObj, JobObjectBasicProcessIdList, pList, 10000, NULL);
bJobAllEnd = TRUE;
for(DWORD i=0; i<pList->NumberOfProcessIdsInList; i++)
{
hProcess = OpenProcess(SYNCHRONIZE, FALSE, pList->ProcessIdList[i]);
if(hProcess != NULL)
{
CloseHandle(hProcess);
bJobAllEnd = FALSE;
}
}
Sleep(500);
} while(!bJobAllEnd);
}
else
qDebug() << "AssignProcess to Job failed: error = " << QString::number(GetLastError());
GlobalFree(pList);
CloseHandle(jobObj);
CloseHandle(ProcessInfo.hThread);
CloseHandle(ProcessInfo.hProcess);
}
}
catch(QString error)
{
QMessageBox::critical(this, "File not found!", "The requested uninstaller doesn't exists", QMessageBox::Ok);
}
// refresh list
handleButton();
}
}