How to kill process by process name in Qt

Question

I'm writing desktop application for windows in Qt.
I have name of 3 processes that if they are running I want to kill them in the begining of my application.
What the best way to do it?(get the status of process by using the process name, and kill it if it's open).

code example can help me a lot. Thanks!

http://stackoverflow.com/questions/4538967/how-to-find-the-running-process-and-kill-the-process-in-qt?rq=1 — , Jul 08 '12 at 08:33

ScarCode · Answer 1 · 2012-07-09T05:47:19.323

12

You can use Qprocess for this purpose. At the start of your application,Do

Qprocess p;
p.start("pkill processname1");
p.waitForFinished();
p.start("pkill processname2");
p.waitForFinished();
p.start("pkill processname2");
p.waitForFinished();

Or you can use system call directly..

system("pkill processname1");
system("pkill processname2");
system("pkill processname3");

In Windows environment, you can use following commands to kill process

process -k “Process ID”
process -k “Process Name”

You can read more of these here.

edited Jul 09 '12 at 05:47

answered Jul 09 '12 at 03:23

ScarCode

3,074
3
19
32

thanks, The command pkill is work also in windows? is it more good than native win32 api – user758795 Jul 09 '12 at 05:32
Is it better that using WIN32 API? if so, why? – user758795 Jul 09 '12 at 06:03
`'pkill' is not recognized as an internal or external command, operable program or batch file.` – kayleeFrye_onDeck Apr 22 '16 at 01:43
`'process' is not recognized as an internal or external command, operable program or batch file.` – kayleeFrye_onDeck Apr 22 '16 at 01:45
1

@kayleeFrye_onDeck On Windows use `taskkill /im program.exe` or `taskkill /pid 123` – niutech Jul 10 '22 at 07:32

creekorful · Answer 2 · 2016-06-23T06:39:25.660

5

Under Windows use taskkill command You can call it using

QProcess::execute("taskkill /im <processname> /f");

Or

system("taskkill /im <processname> /f");

edited Jun 23 '16 at 06:39

answered Jun 23 '16 at 06:17

creekorful

351
4
14

score 1 · Answer 3 · answered Aug 18 '17 at 13:00

QT does not provide any API for killing processes that is not created by your QT project. If you are on Windows you can try following code as explained here

#include <windows.h>
#include <process.h>
#include <Tlhelp32.h>
#include <winbase.h>
#include <string.h>
void killProcessByName(const char *filename)
{
    HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPALL, NULL);
    PROCESSENTRY32 pEntry;
    pEntry.dwSize = sizeof (pEntry);
    BOOL hRes = Process32First(hSnapShot, &pEntry);
    while (hRes)
    {
        if (strcmp(pEntry.szExeFile, filename) == 0)
        {
            HANDLE hProcess = OpenProcess(PROCESS_TERMINATE, 0,
                                          (DWORD) pEntry.th32ProcessID);
            if (hProcess != NULL)
            {
                TerminateProcess(hProcess, 9);
                CloseHandle(hProcess);
            }
        }
        hRes = Process32Next(hSnapShot, &pEntry);
    }
    CloseHandle(hSnapShot);
}
int main()
{
    killProcessByName("notepad++.exe");
    return 0;
}

score 1 · Answer 4 · edited Jan 06 '18 at 11:44

1

How to Run App

bool ok = QProcess::startDetached("C:\\TTEC\\CozxyLogger\\CozxyLogger.exe");
qDebug() <<  "Run = " << ok;

How to Kill App

 system("taskkill /im CozxyLogger.exe /f");
 qDebug() << "Close";[enter image description here][1]

How to kill process by process name in Qt

5 Answers5