QProcess and capturing output

[Aragorn]

I thought about that too, but I don't think I'll be able to do what I want to do putting it into a file.

Ultimately I want to provide a real-time status of the output of the executable that is being run using QProcess. This is the only executable I am having issues with (and unfortunately, one of the key executables I need to get a status from).

If I try redirecting the output to a file in a command-line window (execute.exe > test.txt) I appear to only get text in it at the end as well... but if I don't redirect it, I get output as I should.

I am guessing I am fighting with this executable, and likely there isn't a way for me to work around it, but before I give up, I want to make sure that there isn't something else that I can do to.

Thanks for everyone's suggestions by the way!

[bst]

Hi,

redirection is normally handled inside a shell, not in an external program.

cu, Bernd
--
redir.cpp:

#include <QDebug>
#include <QProcess>
 
int main(void)
{
	QProcess qp1, qp2;
 
	// does not work, because i/o redirection is handled by a shell, not by QProcess or the external exe
	// here the string "> c:\\out1" (!) is passed as an argument to argecho
	qp1.start("c:\\uti\\argecho.exe", QStringList() << "> c:\\out1" << "1" << "2" << "3");
	qp1.waitForFinished();
	qDebug() << "qp1:" << qp1.readAll();
 
	// this works (put the redirection before the external command!)
	qp2.start("c:\\windows\\system32\\cmd.exe", QStringList() << "/C" << "> c:\\out2" << "c:\\uti\\argecho.exe" << "1" << "2" << "3");
	qp2.waitForFinished();
	qDebug() << "qp2:" << qp2.readAll();
 
	return 0;
}

#include <QDebug>
#include <QProcess>

int main(void)
{
	QProcess qp1, qp2;

	// does not work, because i/o redirection is handled by a shell, not by QProcess or the external exe
	// here the string "> c:\\out1" (!) is passed as an argument to argecho
	qp1.start("c:\\uti\\argecho.exe", QStringList() << "> c:\\out1" << "1" << "2" << "3");
	qp1.waitForFinished();
	qDebug() << "qp1:" << qp1.readAll();

	// this works (put the redirection before the external command!)
	qp2.start("c:\\windows\\system32\\cmd.exe", QStringList() << "/C" << "> c:\\out2" << "c:\\uti\\argecho.exe" << "1" << "2" << "3");
	qp2.waitForFinished();
	qDebug() << "qp2:" << qp2.readAll();

	return 0;
}

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argecho.c:

#include <stdio.h>
 
int main ( int argc, char ** argv )
{
   int i;
 
   for ( i = 0; i < argc; i++ )
      printf( "%d: %s\n", i, argv[i] );
 
   return 0;
}

#include <stdio.h>

int main ( int argc, char ** argv )
{
   int i;

   for ( i = 0; i < argc; i++ )
      printf( "%d: %s\n", i, argv[i] );

   return 0;
}

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[Aragorn]

Thank you for the code, however I need to capture the output in real-time. The output appears on the screen in real time, and this is the only executable I am having problems with, so I know the concept of what I am trying to do works.

Does QProcess wait for a certain character, like a new line escape character, before it acknowledges there is content to be read?