Question

Background of project -> I have to upgrade the Linux embedded system remotely. This requires to transfer the tar ball file from Windows Qt application to Linux box connected via Ethernet cable. The Linux box has fixed IP address.

What I have done so far -> Being complete novice in Qt, I have created a dialog box to browse the file and check tar ball file.

Issues -> Now I want that when I click another button, say Upgrade, it should transfer the files from Windows to Linux box (that has fixed IP address) and execute the bash script which has code how to upgrade different files.

May you guys please throw some light how would I send files from Windows to Linux box. I have looked at FTP client of Qt and I guess it downloads the file instead of transferring it.

Thanks and regards,
Sam

Answer 1

1) My batch script say upgrade.bat accepts 2 parameters like ip address , upgrade tar ball
then using putty.exe it transfers the file to linux machine connected via ethernet cable.
example in bat script

pscp -pw “blabla” “%TARGET_UPDATE_FILE%”
user@”%TARGET_IP%”:”%BASE_DIR%”/

where target_update_file = tar ball file accept from Qt and target ip = ip address received as parameter to bat file from qt .

Now on qt , in upgrade button code

void Qt_test::ReadOut()     
{       
     QProcess *processInfo = dynamic_cast< QProcess* >( sender() );

   if( processInfo )
     {
       ui->upgrade_info->append( processInfo->readAllStandardOutput() );
     }        
 }    

void Qt_test::ReadError()
{
     QProcess *processInfo = dynamic_cast< QProcess* >( sender() );

    if( processInfo )
   {
       ui->upgrade_info->append( processInfo->readAllStandardError() );
   }
 }

void Qt_test::on_file_browse_clicked()
{
     ui->selected_file->setText( QFileDialog::getOpenFileName( this, tr( "Open File" ),
                                                        "/home",
                                                        tr( "Upgrade file ( *.tar.gz )"     ) ) );
 }

void  Qt_test::on_file_upgrade_clicked()
 {
        QFileInfo upgradeFileInfo( ui->selected_file->text() );
        if( !upgradeFileInfo.exists() )
       {
             QMessageBox::information( this, tr( "Information" ),
                             tr( "Unable to find file for upgrading!" ) );
            return;
       }     

    QString batchPath= QDir::currentPath() + "\\testUpgrade.bat" ;
    QFileInfo batchFile( batchPath ) ;
    if( !batchFile.exists() )
    {
             QMessageBox::information( this, tr( "Information" ),
                             tr("Failed to find the upgrade batch file....... ") ) ;
         return;
     }

    //Check if cmd.exe is present in Clients system and is located at correct path
       QFileInfo cmdFile( "C:\\Windows\\system32\\cmd.exe");
     if( !cmdFile.exists() )
      {
           QMessageBox::information( this, tr( "Information" ),
                             tr("Failed to find the cmd.exe ... Check cmd.exe is   installed and is in  C:\\Windows\\system32\\ !") ) ;
          return;
      }

     QFileInfo puttyFile( "C:\\Windows\\system32\\putty.exe");
     if( !puttyFile.exists() )
     {
           QMessageBox::information( this, tr( "Information" ),
                              tr("Failed to find the putty.exe ... Check putty.exe(ideally version 0.62.0.0) is installed and is in  C:\\Windows\\system32\\ !") ) ;
          return;
     }

      QFileInfo plinkFile( "C:\\Windows\\system32\\plink.exe");
     if( !plinkFile.exists() )
     {
          QMessageBox::information( this, tr( "Information" ),
                              tr("Failed to find the plink.exe ... Check plink.exe(ideally version 0.62.0.0) is installed and is in  C:\\Windows\\system32\\ !") ) ;
          return;
     }

    QString upgradeFile =   upgradeFileInfo.absoluteFilePath();
   QString ipAddress   =   ui->selected_ip->text();
    qDebug() << " checksum valu is " <<checkSum.count() ;
    QStringList arguments ;

    arguments << " /c" << batchFile.absoluteFilePath()<< upgradeFile << ipAddress ;
   // copying update
   QProcess *processUpgrade = new QProcess( this );
   if( processUpgrade )
    {   std::cout <<" starting to upgrade " << std::endl ;

       processUpgrade->setEnvironment( QProcess::systemEnvironment() )  ;
       processUpgrade->setProcessChannelMode( QProcess::MergedChannels ) ;

        processUpgrade->start( cmdFile.absoluteFilePath(), arguments ) ;
        processUpgrade->waitForStarted() ;
        connect( processUpgrade, SIGNAL( readyReadStandardOutput() ), this, SLOT( ReadOut() ) ) ;
          connect( processUpgrade, SIGNAL( readyReadStandardError()  ), this, SLOT( ReadErr() ) ) ;
  }
 }