why can't QProcess read all output?

[Raul]

In C you can use:

printf(...);
fflush(stdout);

printf(...);
fflush(stdout);

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to flush the stdout buffer

if like the following ?
void mainWindow::iupdateTextEdit()
{
QByteArray newData=inprocess.readAllStandardOutput();
QString text=textEdit->toPlainText()+QString::fromLocal8Bit(newData);
textEdit->setPlainText(text);
fflush(stdout);
}

[Zlatomir]

No, don't use that in Qt.

Use that in your C application (if you have the source of the C application)

[squidge]

If you run your C program from a dos command line, do you get all output?

[Raul]

If you run your C program from a dos command line, do you get all output?

If i set the Konsole to super Konsole(su -) ,i can get all output.but if i set it to "/bin/bash",it can't .

[squidge]

If i set the Konsole to super Konsole(su -) ,i can get all output.but if i set it to "/bin/bash",it can't .

Then it seems like you can't get the same behaviour from your Qt app without first requesting su?

[Raul]

Then it seems like you can't get the same behaviour from your Qt app without first requesting su?

I just use QProcess start the program.and read the process.I didn't know how to request su first.if you can tell me how to request su first.

[Raul]

Then it seems like you can't get the same behaviour from your Qt app without first requesting su?

I think my problem occurs without first requesting su.and i have studied the PAM.but i can't solve my problem yet,the main reason is that i don't know how to request su first.

[squidge]

Well, you can always give root access to your program permanently, if you don't want to request it whilst running:

chown root your_app
chmod a+xs your_app

[Raul]

Well, you can always give root access to your program permanently, if you don't want to request it whilst running:

chown root your_app
chmod a+xs your_app

the result is the same as before.

[Raul]

No, don't use that in Qt.

Use that in your C application (if you have the source of the C application)

unfortunately,i haven't the soures of the C application.