QThread ::终止vs杀死

Question

I have a BASH script run (QProcess blocking) in a QThread (in C++). This BASH script tars lots of files and can run for 1/2 hour.

In case the user wants to shutdown my program I need to kill my BASH script. But how? QThread::Quit will wait for the BASH program to terminate before processing signals, QThread::Terminate documentation says it MAY kill a thread immediately.

I want the equivalent of 'kill -9 myscript'. Is there a proper Qt way to do this?

Answer 1

1. Do not use additional threads. It's never necessary.
2. Never use any waitForXxx methods.
3. Use QProcess::kill to kill the process.
4. Use QProcess 's signals to get notified when the process changes state, eg is finished.

Answer 2

I want the equivalent of 'kill -9 myscript'. Is there a proper Qt way to do this ?

from the Qt's doc http://doc.qt.io/qt-5/qprocess.html#kill :

void QProcess::kill()

Kills the current process, causing it to exit immediately.

On Windows, kill() uses TerminateProcess, and on Unix and macOS, the SIGKILL signal is sent to the process.