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request about scp command (QProcess) using qt

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  • H hlowd

    @hlowd

    I entered two words in the post, but only one is displayed on the screen...

    jsulmJ Online
    jsulmJ Online
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #10

    @hlowd said in request about scp command (QProcess) using qt:

    I entered two words in the post, but only one is displayed on the screen...

    Use code tags properly, then it will be shown correctly

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    1 Reply Last reply
    0
    • H hlowd

      @hlowd

      I entered two words in the post, but only one is displayed on the screen...

      H Offline
      H Offline
      hlowd
      wrote on last edited by
      #11

      @hlowd

      listArguments << "D:\\SVN\\Work\\test\\a.ini" << "user@192.168.1.250:/home/user/SW/";

      Even though I entered it like this, it is the same.
      The response from start comes immediately, but the readOutput function is not called.

      jsulmJ H 2 Replies Last reply
      0
      • H hlowd

        @hlowd

        listArguments << "D:\\SVN\\Work\\test\\a.ini" << "user@192.168.1.250:/home/user/SW/";

        Even though I entered it like this, it is the same.
        The response from start comes immediately, but the readOutput function is not called.

        jsulmJ Online
        jsulmJ Online
        jsulm
        Lifetime Qt Champion
        wrote on last edited by
        #12

        @hlowd said in request about scp command (QProcess) using qt:

        but the readOutput function is not called

        Probably because you're deleting m_process right after waitForFinished.
        Are you sure scp.exe command is found?
        Try with an absolute path to scp.exe to make sure it is actually found.

        https://forum.qt.io/topic/113070/qt-code-of-conduct

        1 Reply Last reply
        0
        • H hlowd

          @hlowd

          listArguments << "D:\\SVN\\Work\\test\\a.ini" << "user@192.168.1.250:/home/user/SW/";

          Even though I entered it like this, it is the same.
          The response from start comes immediately, but the readOutput function is not called.

          H Offline
          H Offline
          hlowd
          wrote on last edited by
          #13

          @hlowd

          The symptom is the same even if delete is not called.

          If it is a command instruction rather than a code, the instruction will be executed normally.
          The file is moved normally. (Windows -> Linux)

          jsulmJ H 2 Replies Last reply
          0
          • H hlowd

            @hlowd

            The symptom is the same even if delete is not called.

            If it is a command instruction rather than a code, the instruction will be executed normally.
            The file is moved normally. (Windows -> Linux)

            jsulmJ Online
            jsulmJ Online
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #14

            @hlowd Again: try with absolute path to scp.exe

            https://forum.qt.io/topic/113070/qt-code-of-conduct

            1 Reply Last reply
            0
            • H hlowd

              @hlowd

              The symptom is the same even if delete is not called.

              If it is a command instruction rather than a code, the instruction will be executed normally.
              The file is moved normally. (Windows -> Linux)

              H Offline
              H Offline
              hlowd
              wrote on last edited by hlowd
              #15

              @hlowd
              There are files in that path.

              C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
              
              scp.exe
              ssh-add.exe
              ssh-agent.exe
              ssh-keygen.exe
              

              // new code

              QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
              

              // error message

              "CreateProcessW failed error:2 posix_spawn: No such file or directory"
              
              JonBJ jsulmJ 2 Replies Last reply
              0
              • H hlowd

                @hlowd
                There are files in that path.

                C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
                
                scp.exe
                ssh-add.exe
                ssh-agent.exe
                ssh-keygen.exe
                

                // new code

                QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
                

                // error message

                "CreateProcessW failed error:2 posix_spawn: No such file or directory"
                
                JonBJ Offline
                JonBJ Offline
                JonB
                wrote on last edited by JonB
                #16

                @hlowd
                If you want help on this, at least for my part, please make the effort to enclose your code blocks and literal extracts in the forums block quotes (</> button) as we have asked several times. It does not require much effort on your side.

                By now you should be trying a command of scp, nothing else, no arguments, to verify that (a) it is found and can be run and (b) you can successfully read any output from it, e.g. presumably a "usage" message in this case.

                1 Reply Last reply
                0
                • H hlowd

                  @hlowd
                  There are files in that path.

                  C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
                  
                  scp.exe
                  ssh-add.exe
                  ssh-agent.exe
                  ssh-keygen.exe
                  

                  // new code

                  QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
                  

                  // error message

                  "CreateProcessW failed error:2 posix_spawn: No such file or directory"
                  
                  jsulmJ Online
                  jsulmJ Online
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #17

                  @hlowd said in request about scp command (QProcess) using qt:

                  Can I do it this way?

                  Yes, just try.
                  I would also execute scp using this absolute path in a terminal to make sure it works.

                  https://forum.qt.io/topic/113070/qt-code-of-conduct

                  H 1 Reply Last reply
                  0
                  • jsulmJ jsulm

                    @hlowd said in request about scp command (QProcess) using qt:

                    Can I do it this way?

                    Yes, just try.
                    I would also execute scp using this absolute path in a terminal to make sure it works.

                    H Offline
                    H Offline
                    hlowd
                    wrote on last edited by
                    #18

                    @jsulm

                    There are files in that path.

                    C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
                    
                    scp.exe
                    ssh-add.exe
                    ssh-agent.exe
                    ssh-keygen.exe
                    

                    // new code

                    QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
                    

                    // error message

                    "CreateProcessW failed error:2 posix_spawn: No such file or directory"
                    

                    The same error occurs in the command prompt.

                    JonBJ jsulmJ 2 Replies Last reply
                    0
                    • H hlowd

                      @jsulm

                      There are files in that path.

                      C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
                      
                      scp.exe
                      ssh-add.exe
                      ssh-agent.exe
                      ssh-keygen.exe
                      

                      // new code

                      QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
                      

                      // error message

                      "CreateProcessW failed error:2 posix_spawn: No such file or directory"
                      

                      The same error occurs in the command prompt.

                      JonBJ Offline
                      JonBJ Offline
                      JonB
                      wrote on last edited by
                      #19

                      @hlowd
                      I am not a total Windows expert, but I did not think you should ever attempt to run anything in the WinSxS area? You should be running the scp which is on your PATH (presumably).

                      1 Reply Last reply
                      0
                      • H hlowd

                        @jsulm

                        There are files in that path.

                        C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb
                        
                        scp.exe
                        ssh-add.exe
                        ssh-agent.exe
                        ssh-keygen.exe
                        

                        // new code

                        QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";
                        

                        // error message

                        "CreateProcessW failed error:2 posix_spawn: No such file or directory"
                        

                        The same error occurs in the command prompt.

                        jsulmJ Online
                        jsulmJ Online
                        jsulm
                        Lifetime Qt Champion
                        wrote on last edited by
                        #20

                        @hlowd Did scp executable ever work for you in terminal? The path where it is located looks strange, don't know from where it comes. On my machine I have it here: c:\windows\System32\OpenSSH\scp.exe

                        You can check where your scp.exe is located using this command:

                        where scp
                        

                        https://forum.qt.io/topic/113070/qt-code-of-conduct

                        H 1 Reply Last reply
                        2
                        • jsulmJ jsulm

                          @hlowd Did scp executable ever work for you in terminal? The path where it is located looks strange, don't know from where it comes. On my machine I have it here: c:\windows\System32\OpenSSH\scp.exe

                          You can check where your scp.exe is located using this command:

                          where scp
                          
                          H Offline
                          H Offline
                          hlowd
                          wrote on last edited by
                          #21

                          @jsulm

                          The scp.exe file exists in that path.

                          C:\Windows\System32\OpenSSH
                          

                          I don't know why I couldn't find it using Explorer search.

                          jsulmJ 1 Reply Last reply
                          0
                          • H hlowd

                            @jsulm

                            The scp.exe file exists in that path.

                            C:\Windows\System32\OpenSSH
                            

                            I don't know why I couldn't find it using Explorer search.

                            jsulmJ Online
                            jsulmJ Online
                            jsulm
                            Lifetime Qt Champion
                            wrote on last edited by
                            #22

                            @hlowd said in request about scp command (QProcess) using qt:

                            The scp.exe file exists in that path

                            Does it work with this path?

                            https://forum.qt.io/topic/113070/qt-code-of-conduct

                            H 1 Reply Last reply
                            0
                            • jsulmJ jsulm

                              @hlowd said in request about scp command (QProcess) using qt:

                              The scp.exe file exists in that path

                              Does it work with this path?

                              H Offline
                              H Offline
                              hlowd
                              wrote on last edited by
                              #23
                              This post is deleted!
                              1 Reply Last reply
                              0
                              • H Offline
                                H Offline
                                hlowd
                                wrote on last edited by hlowd
                                #24

                                @jsulm
                                No, it doesn't work..

                                JonBJ 1 Reply Last reply
                                0
                                • H hlowd

                                  @jsulm
                                  No, it doesn't work..

                                  JonBJ Offline
                                  JonBJ Offline
                                  JonB
                                  wrote on last edited by
                                  #25

                                  @hlowd
                                  This really should not be too difficult to diagnose, if you stick to what is suggested and report behaviour.

                                  First try both of

                                  scp
                                  \full\path\to\scp
                                  

                                  in a Command Prompt. I assume at least one "works", and produces a "usage" output message?

                                  Whichever produces the message, now try from a Qt program

                                  QProcess proc;
                                  proc.start(".....");    // here try whichever worked in Command Prompt
                                  qDebug() << proc.waitForFinished();
                                  qDebug() << proc.readAll();
                                  

                                  and report output.

                                  H 1 Reply Last reply
                                  1
                                  • JonBJ JonB

                                    @hlowd
                                    This really should not be too difficult to diagnose, if you stick to what is suggested and report behaviour.

                                    First try both of

                                    scp
                                    \full\path\to\scp
                                    

                                    in a Command Prompt. I assume at least one "works", and produces a "usage" output message?

                                    Whichever produces the message, now try from a Qt program

                                    QProcess proc;
                                    proc.start(".....");    // here try whichever worked in Command Prompt
                                    qDebug() << proc.waitForFinished();
                                    qDebug() << proc.readAll();
                                    

                                    and report output.

                                    H Offline
                                    H Offline
                                    hlowd
                                    wrote on last edited by
                                    #26

                                    @JonB

                                    it works(data is output)

                                    • output 1 : true
                                    • output 2 : "\r\nWindows IP ....."
                                    QProcess proc;
                                    proc.start("ipconfig /all");
                                    qDebug() << "output 1 : " << proc.waitForFinished();
                                    qDebug() << "output 2 : " << proc.readAll();
                                    

                                    do not Working

                                    • output 1 : false
                                    • output 2 : ""
                                    QProcess proc;
                                    proc.start("scp C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                    qDebug() << "output 1 : " << proc.waitForFinished();
                                    qDebug() << "output 2 : " << proc.readAll();
                                    

                                    this is also do not working

                                    • output 1 : false
                                    • output 2 : ""
                                    QProcess proc;
                                        proc.start("C:\\Windows\\System32\\OpenSSH\\scp.exe C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                        qDebug() << "output 1 : " << proc.waitForFinished();
                                        qDebug() << "output 2 : " << proc.readAll();
                                    
                                    jsulmJ Pl45m4P JonBJ 3 Replies Last reply
                                    0
                                    • H hlowd

                                      @JonB

                                      it works(data is output)

                                      • output 1 : true
                                      • output 2 : "\r\nWindows IP ....."
                                      QProcess proc;
                                      proc.start("ipconfig /all");
                                      qDebug() << "output 1 : " << proc.waitForFinished();
                                      qDebug() << "output 2 : " << proc.readAll();
                                      

                                      do not Working

                                      • output 1 : false
                                      • output 2 : ""
                                      QProcess proc;
                                      proc.start("scp C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                      qDebug() << "output 1 : " << proc.waitForFinished();
                                      qDebug() << "output 2 : " << proc.readAll();
                                      

                                      this is also do not working

                                      • output 1 : false
                                      • output 2 : ""
                                      QProcess proc;
                                          proc.start("C:\\Windows\\System32\\OpenSSH\\scp.exe C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                          qDebug() << "output 1 : " << proc.waitForFinished();
                                          qDebug() << "output 2 : " << proc.readAll();
                                      
                                      jsulmJ Online
                                      jsulmJ Online
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #27

                                      @hlowd Could you please read QProcess documentation?!
                                      The way you're using QProcess is wrong: all parameters should be part of arguments list. And what about adding error handling as already suggested?

                                      https://forum.qt.io/topic/113070/qt-code-of-conduct

                                      1 Reply Last reply
                                      2
                                      • H hlowd

                                        @JonB

                                        it works(data is output)

                                        • output 1 : true
                                        • output 2 : "\r\nWindows IP ....."
                                        QProcess proc;
                                        proc.start("ipconfig /all");
                                        qDebug() << "output 1 : " << proc.waitForFinished();
                                        qDebug() << "output 2 : " << proc.readAll();
                                        

                                        do not Working

                                        • output 1 : false
                                        • output 2 : ""
                                        QProcess proc;
                                        proc.start("scp C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                        qDebug() << "output 1 : " << proc.waitForFinished();
                                        qDebug() << "output 2 : " << proc.readAll();
                                        

                                        this is also do not working

                                        • output 1 : false
                                        • output 2 : ""
                                        QProcess proc;
                                            proc.start("C:\\Windows\\System32\\OpenSSH\\scp.exe C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                            qDebug() << "output 1 : " << proc.waitForFinished();
                                            qDebug() << "output 2 : " << proc.readAll();
                                        
                                        Pl45m4P Offline
                                        Pl45m4P Offline
                                        Pl45m4
                                        wrote on last edited by
                                        #28

                                        @hlowd said in request about scp command (QProcess) using qt:

                                        proc.start("scp C:\Users\user\a.ini user@192.168.1.250:/home/user/SW/");

                                        You need argument list for QProcess
                                        The whole statement in start wont work.

                                        Here in your similar topic is an example by @ChrisW67 and me..

                                        • https://forum.qt.io/topic/152140/shellexecute-사용-관련-문의

                                        If debugging is the process of removing software bugs, then programming must be the process of putting them in.

                                        ~E. W. Dijkstra

                                        1 Reply Last reply
                                        0
                                        • H hlowd

                                          @JonB

                                          it works(data is output)

                                          • output 1 : true
                                          • output 2 : "\r\nWindows IP ....."
                                          QProcess proc;
                                          proc.start("ipconfig /all");
                                          qDebug() << "output 1 : " << proc.waitForFinished();
                                          qDebug() << "output 2 : " << proc.readAll();
                                          

                                          do not Working

                                          • output 1 : false
                                          • output 2 : ""
                                          QProcess proc;
                                          proc.start("scp C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                          qDebug() << "output 1 : " << proc.waitForFinished();
                                          qDebug() << "output 2 : " << proc.readAll();
                                          

                                          this is also do not working

                                          • output 1 : false
                                          • output 2 : ""
                                          QProcess proc;
                                              proc.start("C:\\Windows\\System32\\OpenSSH\\scp.exe C:\\Users\\user\\a.ini user@192.168.1.250:/home/user/SW/");
                                              qDebug() << "output 1 : " << proc.waitForFinished();
                                              qDebug() << "output 2 : " << proc.readAll();
                                          
                                          JonBJ Offline
                                          JonBJ Offline
                                          JonB
                                          wrote on last edited by JonB
                                          #29

                                          @hlowd
                                          So, as I suspected, this shows you are not using QProcess::start() correctly. (It is also not the same as the code you posted in earlier, which was correct at one point.) Which is why I asked you to clarify this. If start("scp", ...) or start("/path/to/scp", ...) run the scp executable, and perhaps produce "usage" output you can capture, it shows that is working.

                                          Your other attempts should all indeed fail as you incorrectly try to pass arguments in the string which should be the executable. The example at https://doc.qt.io/qt-6/qprocess.html#running-a-process shows how to do this correctly. If you are on Qt 6.0+ there is a new method, startCommand(), which works the way you tried, if you really want to do it that way.

                                          1 Reply Last reply
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