How do I stop QT writing to console?

Reply to How do I stop QT writing to console? on Thu, 26 Sep 2013 13:36:23 GMT

Tom C — Thu, 26 Sep 2013 13:36:23 GMT

You can change where Qt prints out debug messages, warnings, critical and fatal error messages by installing a new message handler.

See the documentation :
http://qt-project.org/doc/qt-5.0/qtcore/qtglobal.html#qInstallMessageHandler

For example, you can choose to redirect them in a log file.

Reply to How do I stop QT writing to console? on Thu, 26 Sep 2013 13:22:46 GMT

oncaphillis — Thu, 26 Sep 2013 13:22:46 GMT

In the Code you may achieve the same effect with

int fd = ::open("/dev/null/",O_WRONLY,0744 );
if(fd!=-1)
{
dup2(fd,1)
dup2(fd,2)
close(fd);
}

A simpler solution ould be to simply wrte a bash frontend like
/bin/application which does

#!/bin/bash

/bin/application-bin >/dev/null 2>&1

Reply to How do I stop QT writing to console? on Thu, 26 Sep 2013 12:41:03 GMT

Moschops — Thu, 26 Sep 2013 12:41:03 GMT

The intention is that the user should not under ordinary circumstances have messages presented in the console, so silent is fine.

I'd rather not have to do some command-line fu to get this right; the current requirement is that the user should be able to start the application with no more than typing the name of the application at the command line, so a fix that requires them to do more is off the table at the moment.

Reply to How do I stop QT writing to console? on Thu, 26 Sep 2013 12:25:45 GMT

oncaphillis — Thu, 26 Sep 2013 12:25:45 GMT

Is simple redirection on the command line a solution ?

command >/dev/null 2>&1

But then it is totally silent