solved:

void Read(QString file){ QProcess process; process.startDetached(file); } int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); QTimer t; QObject::connect(&t, &QTimer::timeout, [&](){ Read(s); t.stop(); }); t.start(60000); return a.exec(); }

If it needs a named pipe then you should ask the author.

AFAIK, you should be able to connect to a named pipe using QLocalSocket

@koahnig
it is out of subject on this forum, but I tested with the win32 function Shellexecute and "runas" as second parameter instead of qprocess and it created my service.so I mark this subject solved.thanks.

@testus
It could well that
@Wieland said:

I think the problem is that you don't have an event queue in your recordThread that processes any signals. The started() signal might get posted to your GUI thread's event queue before the thread affinity of the QProcess instance changes (but I can't tell for sure from the few lines of code).

this is part of your problem.

You so not show that you are keeping the pointers somehwere. Otherwise it does most of the time actually work, but you are creating memory leaks. Also this might be a reason that you are not receiving a finished signal.

I am using such a mechanism in a small tool which has to start quite a number of processes in a row. It have a separate slotmethod created which is triggered through a QTimer. The slot method is checking the stack of processes running and eliminate those which have finished state. Not really elegant, it works.

@Chris-Kawa yeah thanks a lot thats what i did after your answer :D .

@koahnig thanks, closed those as requested.

@grafzahl said:

I also now use the system command.

If you can, I suggest to use QProcess to run external commands. This for two reasons:

QProcess is cross-platform (in the future you could want to build your application also on other platforms); You can have direct access to the standard out/err, ....

Here's an example that will print info on all available interfaces:

QString command("netsh interface ipv4 show addresses \"%1\""); auto infs = QNetworkInterface::allInterfaces(); for(auto inf : infs) { QProcess proc; proc.start(command.arg(inf.humanReadableName())); proc.waitForFinished(); qDebug() << proc.readAll(); }

You can adjust it to fit your needs.