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How to open console window via QProcess?

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  • K Offline
    K Offline
    Kien Bui
    wrote on last edited by
    #1

    I init a QProcess to open a console window, but no window is show.

    QProcess *process = new QProcess();
    process->start("adb devices");
    
    1 Reply Last reply
    0
    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi and welcome to devnet,

      There's no reason for any console window to be shown when executing such a command.

      If you want to parse the output of your process then you can read what was sent to stdout once your command has finished.

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      1 Reply Last reply
      3
      • K Offline
        K Offline
        Kien Bui
        wrote on last edited by Kien Bui
        #3

        To work with Android device, I need open a console window. I want to open a console window to continue text command
        Eg: "adb -s device shell" to open shell access android device

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        0
        • K Offline
          K Offline
          Kien Bui
          wrote on last edited by
          #4

          I found a keyword: "CREATE_NEW_CONSOLE" but I don't know to use it

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          • mrjjM Offline
            mrjjM Offline
            mrjj
            Lifetime Qt Champion
            wrote on last edited by mrjj
            #5

            Hi,
            What you want is called a interactive shell/prompt
            This is sample for Windows

            QDetachableProcess process;
                QString program = "cmd.exe";
                QStringList arguments = QStringList() << "/K" << "C:\\Program Files\\Inkscape\\python.exe";
                process.setCreateProcessArgumentsModifier(
                            [](QProcess::CreateProcessArguments *args) {
                    args->flags |= CREATE_NEW_CONSOLE;
                    args->startupInfo->dwFlags &=~ STARTF_USESTDHANDLES;
                });
                process.start(program, arguments);
                process.detach();
                }
            

            starts python and let u type commands in it.

            JonBJ 1 Reply Last reply
            2
            • mrjjM mrjj

              Hi,
              What you want is called a interactive shell/prompt
              This is sample for Windows

              QDetachableProcess process;
                  QString program = "cmd.exe";
                  QStringList arguments = QStringList() << "/K" << "C:\\Program Files\\Inkscape\\python.exe";
                  process.setCreateProcessArgumentsModifier(
                              [](QProcess::CreateProcessArguments *args) {
                      args->flags |= CREATE_NEW_CONSOLE;
                      args->startupInfo->dwFlags &=~ STARTF_USESTDHANDLES;
                  });
                  process.start(program, arguments);
                  process.detach();
                  }
              

              starts python and let u type commands in it.

              JonBJ Online
              JonBJ Online
              JonB
              wrote on last edited by
              #6

              @mrjj
              Yes, but the OP wants it for Android! :)

              mrjjM 1 Reply Last reply
              1
              • JonBJ JonB

                @mrjj
                Yes, but the OP wants it for Android! :)

                mrjjM Offline
                mrjjM Offline
                mrjj
                Lifetime Qt Champion
                wrote on last edited by
                #7

                @JonB
                Oh, thx. i missed that little word.
                No idea how to get interactive shell on phone.
                if even allowed.

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                • M Offline
                  M Offline
                  mnbv
                  wrote on last edited by mnbv
                  #8

                  Wanted to do something similar and found this while checking if QProcess could handle it conveniently (it can't, as seen above).

                  Just use std::system. Doing it with QProcess just makes extra work. E.g. for the OP:

                  #include <cstdlib>
                  
                  std::system("adb -s device shell");
                  

                  If you want to just open a command shell, the command depends on the platform but it'd be something like:

                  std::system("cmd"); // windows
                  std::system("/bin/bash"); // linux, maybe osx? 
                  // etc...
                  

                  For that Python example above:

                  std::system("\"C:\\Program Files\\Inkscape\\python.exe\"");
                  
                  // or if necessary:
                  std::system("cmd /K \"C:\\Program Files\\Inkscape\\python.exe\"");
                  
                  // or if python is in the path, just:
                  std::system("python");
                  

                  PS This whole thread is a bit silly. The OP didn't want to open a shell on a phone, and there's definitely good reasons to start adb in a console window (it's a console-based interactive shell for debugging an attached Android device). The OP wanted to start it in a console window so they could continue to use it in said console window after starting it.

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