REGEX in QString isnt passed correct to QProcess



  • Hi,
    with the code below i load a file named fileName into a perlscript.
    With the regex (!/^$/) i get rid of all lines that starts with a $ .
    the rest is put into a variable alllines.
    after that the program is passed into a QProcess and all the output directed to QListView.

    I get the following error

    Fehler:unknown escape sequence '$'

    my idea is that the regex !/^$/ is the problem.

    @
    oid EngMountStiff::on_commandLinkButton_clicked()
    {

    QString aScript =    "$file = \""+fileName+"\";"
            "print $file;"
                         " open(PCH, $file);  # Open the file "
                         " while (<PCH>) {                               "
                        "    if (!/^\$/)                                "
                        "    {                                          "
                         "        push(@alllines,$_);                    "
                        "    }                                          "
                         "}                                              "
                        "close(PCH);   # Close the file        "
    "print @alllines;";
    
    //start perlscript
    QProcess perl;
    QString perlscript = "/usr/bin/perl";
    
    
    
    
    perl.start(perlscript);
    perl.write(aScript.toUtf8());
    perl.closeWriteChannel();
    perl.waitForFinished(-1);
    perl.setProcessChannelMode(QProcess::MergedChannels);
    QString p_stdout = perl.readAllStandardOutput();
    QString p_stderr = perl.readAllStandardError();
    
    //stream in processwindow
     ui->output->setText(p_stderr);
     ui->output->setText(p_stdout);
    

    @


  • Moderators

    Escape it properly, then:
    @
    " if (!/^\$/)"
    @



  • I am sorry but than the regex isnt working correct.
    But u are rigth the programm is running.


  • Moderators

    Try with simpler scripts (a hello world or something) to see if Perl is really working well from within QProcess.



  • Allready done. Simple hello world is working and only printing the file fileName is also ok.
    Do you have an idea how to ouput the resulting qstring (aScript), after it is processed, so i can see how the \$ is translated?


Log in to reply
 

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.