Getting Console output from a script.

Mschudder

Hello

I am struggling getting output from the console.

@ QProcess OProcess;
QString Command = "grunt > /tmp/lolx.txt";

QDir::setCurrent(ui->plainTxtBrowserFolder->toPlainText() + "/");
OProcess.start(Command);

QString ab =        OProcess.readAll();

ui->txtBrowserTerminal->append(ab);

QString StdOutx     =   OProcess.readAllStandardOutput();  //Reads standard output
QString StdErrorx    =   OProcess.readAllStandardError();   //Reads standard error@

When I run the command "ls" or something like that everything is working perfectly.

But when running the "Grunt" command I do not seem to get any output :/ can anyone explain me why ?

I am sure I am in the right folder, and when I run the command from a terminal it works.

Grunt = gruntjs.com/getting-started

Thanks
kind regards

koahnig

welcome to devnet

From your code snippet it looks like you read before the process has been finished. Check out "waitForFinished":http://qt-project.org/doc/qt-5/qprocess.html#waitForFinished

Mschudder

Hello,

Thanks, well I have tried that aswell
@ QProcess OProcess;
QString Command = "grunt > /tmp/lolx.txt";

QDir::setCurrent(ui->plainTxtBrowserFolder->toPlainText() + "/");
OProcess.start(Command);
OProcess.waitForFinished(-1);

QString StdOut      =   OProcess.readAllStandardOutput();  //Reads standard output
QString StdError    =   OProcess.readAllStandardError();   //Reads standard error
 QString a =        OProcess.readAll();

ui->txtBrowserTerminal->append(a);
ui->txtBrowserTerminal->append(StdOut);
ui->txtBrowserTerminal->append(StdError);@

But nothing comes out, when I run the command ,after I run this process , in my terminal I see the result in my terminal but nothing in my txtBrowserTerminal.

SGaist

Hi,

You are redirecting the output of grunt in a file, so (unless I'm mistaken) you should not have anything on stdout only on stderr.

You should try to run grunt without any redirection to catch its output with QProcess.

Hope it helps

Mschudder

Hello,

Well I tried that aswell :/ was just trying to see if the file gets created but that's not the case aswell.

So I am guessing he doesn't call it .. or can't call it.

Can I debug this ?

Thanks

SGaist

Where is grunt located ?

Check what QProcess::error() returns

Mschudder

It returns no such file or directory.

But then when I try:
@ QProcess OProcess;
QString Command = "/usr/local/bin/grunt";

QDir::setCurrent(ui->plainTxtBrowserFolder->toPlainText() + "/");
OProcess.start(Command);
OProcess.waitForFinished(-1);

QString error = OProcess.errorString();
ui->txtBrowserTerminal->append(error);

@

It returns " unknown error" and "env: node: No such file or directory"

So now he doesn't find "node".

I think the problem is that this QProcess doesn't get my PATH variables ? or doesn't has access to it ?

Thanks already man !

SGaist

You can set the environment of QProcess using setProcessEnvironment