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QProcess::startDetached() but hide console window


QProcess::startDetached() but hide console window

By : Jessica Williams
Date : November 21 2020, 09:01 AM
I wish did fix the issue. I had exactly the same problem, and could not solve it in a clean way. I have found 2 options:
Hacky way: Subclass QProcess and call setProcessState(QProcess::NotRunning); after starting the process. This will prevent the destructor to terminate the process. But it relies on an implementation detail of QProcess
code :
{
    QProcess *process = new QProcess;
    process->start("taskkill", QStringList() << "/f" << "/im" << "My Service.exe");
}


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Set Environment Variables for startDetached() QProcess

Set Environment Variables for startDetached() QProcess


By : user2484854
Date : March 29 2020, 07:55 AM
wish help you to fix your issue It is a known old bug: http://bugreports.qt-project.org/browse/QTBUG-2284. You need to overload startDetached function to support your own environment. Take a look at Qt sources to see how to do that: http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/io?h=5.5 (qprocess* files).
QProcess.startDetached() and write to its stdin

QProcess.startDetached() and write to its stdin


By : jamait
Date : March 29 2020, 07:55 AM
hop of those help? Good morning.
The problem is that QProcess::startDetached() is a static method which creates a "fire and forget" process.
code :
QProcess::startDetached (const QString &program, const QStringList &arguments, const   QString &workingDirectory);
Will QProcess::startDetached() cause a memory leak?

Will QProcess::startDetached() cause a memory leak?


By : GLOBE Claritas
Date : March 29 2020, 07:55 AM
may help you . That is a static method. You're not even allocating anything. No leak.
What is the difference between QProcess::start and QProcess::startDetached?

What is the difference between QProcess::start and QProcess::startDetached?


By : Maroof Ali
Date : March 29 2020, 07:55 AM
seems to work fine If you use start, termination of the caller process will cause the termination of the called process as well. If you use startDetached, after the caller is terminated, the child will continue to live. For example:
code :
QProcess * p = new QProcess();
p->start("some-app");
delete p;// <---some-app will be terminated

QProcess * p = new QProcess();
p->startDetached("some-app");
delete p;// <---some-app will continue to live
QProcess::startDetached() not show console window

QProcess::startDetached() not show console window


By : 12spiderer
Date : March 29 2020, 07:55 AM
I hope this helps you . It is the expected behavior. At least in Windows startDetached is equivalent to calling CreateProcess with the DETACHED_PROCESS flag, where the new process does not inherit its parent's console. It makes sense that in other platforms the method would do something similar.
In this case you'd had to manually allocate a new one using AllocConsole on the new process (be aware that you may need to redirect the streaming handles to the new console), or try to start the process in a different way (check CreateProcess or fork).
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