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SFtp Client with LIBSSH

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  • ODБOïO Offline
    ODБOïO Offline
    ODБOï
    wrote on last edited by
    #1

    Hello,

    I'm trying to create SFtp client using Libssh (with Qt5.10 mingw53_32)

    I have installed libssh-0.7.2-mingw.exe from here : https://red.libssh.org/projects/libssh/files

    then i have copied all the headers + libssh.dll and libssh.dll.a to my Qt project.

    and also added this to my .pro

    LIBS += -L$$PWD/./ -llibssh.dll 
    INCLUDEPATH += $$PWD/.
    DEPENDPATH += $$PWD/.
    

    Now in my main.cpp i'm including libssh : #include "libssh.h" and trying to create session

     ssh_session my_ssh_session = ssh_new();
    

    It compiles witout errors but craches as soon as i hit RUN button in Qt Creator

    Can please someone tell me what im doing wrong ?

    Thank you in advance
    LA

    jsulmJ 1 Reply Last reply
    1
    • ODБOïO ODБOï

      Hello,

      I'm trying to create SFtp client using Libssh (with Qt5.10 mingw53_32)

      I have installed libssh-0.7.2-mingw.exe from here : https://red.libssh.org/projects/libssh/files

      then i have copied all the headers + libssh.dll and libssh.dll.a to my Qt project.

      and also added this to my .pro

      LIBS += -L$$PWD/./ -llibssh.dll 
      INCLUDEPATH += $$PWD/.
      DEPENDPATH += $$PWD/.
      

      Now in my main.cpp i'm including libssh : #include "libssh.h" and trying to create session

       ssh_session my_ssh_session = ssh_new();
      

      It compiles witout errors but craches as soon as i hit RUN button in Qt Creator

      Can please someone tell me what im doing wrong ?

      Thank you in advance
      LA

      jsulmJ Offline
      jsulmJ Offline
      jsulm
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @LeLev Please start your app in debug mode (F5) and see where exactly it crashes (you can post stack trace here).
      Most probably the DLLs are not in the same directory where your exe is - you can copy them to this directory and start again.

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

      1 Reply Last reply
      3
      • aha_1980A Offline
        aha_1980A Offline
        aha_1980
        Lifetime Qt Champion
        wrote on last edited by
        #3

        @LeLev said in SFtp Client with LIBSSH:

        LIBS += -L$$PWD/./ -llibssh.dll

        Looks odd. Try changing this line to:

        LIBS += -L$$PWD -lssh

        Creator scans your LIBS lines and adds them to the DLL search path, so in principle it should work out of the box.

        Qt has to stay free or it will die.

        1 Reply Last reply
        2
        • ODБOïO Offline
          ODБOïO Offline
          ODБOï
          wrote on last edited by
          #4

          @jsulm i have copied libssh.dll near the .exe, and when i run in debug mode i have :

          During startup program exited with code 0xc0000135

          As @aha_1980 suggested i replaced LIBS += -L$$PWD/./ -llibssh.dll by LIBS += -L$$PWD -lssh but it still craches.

          Thx for help

          jsulmJ 1 Reply Last reply
          1
          • ODБOïO ODБOï

            @jsulm i have copied libssh.dll near the .exe, and when i run in debug mode i have :

            During startup program exited with code 0xc0000135

            As @aha_1980 suggested i replaced LIBS += -L$$PWD/./ -llibssh.dll by LIBS += -L$$PWD -lssh but it still craches.

            Thx for help

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by jsulm
            #5

            @LeLev Probably more DLLs are missing. You can use http://www.dependencywalker.com/ to check what is missing.
            Another reason could be that a different version of MinGW was used.

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

            1 Reply Last reply
            2
            • ODБOïO Offline
              ODБOïO Offline
              ODБOï
              wrote on last edited by
              #6

              In fact, auther dlls are missing. I have deployed my application and just double clicked .exe (not from qt creator) now i have more "readable" error : missing zlib1.dll

              after adding that dll, it is working !

              Thank you very much @jsulm and @aha_1980

              1 Reply Last reply
              3
              • ODБOïO Offline
                ODБOïO Offline
                ODБOï
                wrote on last edited by
                #7

                Im back here because it looks like everything is working fine but this line is making my app crash

                 sftp = sftp_new(my_ssh_session); //  Crash here : Segmentation fault 
                
                ssh_session my_ssh_session = ssh_new();
                    if (my_ssh_session == NULL)
                      qDebug("error ssh session creation");//exit(-1);
                sftp_session sftp;
                sftp = sftp_new(my_ssh_session); //  Crash here : Segmentation fault 
                    if(sftp==NULL)
                      qDebug("error sftp session creation");
                
                1 Reply Last reply
                0
                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  Hi,

                  Since there's a crash you should post the stack trace.

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

                  ODБOïO 1 Reply Last reply
                  0
                  • SGaistS SGaist

                    Hi,

                    Since there's a crash you should post the stack trace.

                    ODБOïO Offline
                    ODБOïO Offline
                    ODБOï
                    wrote on last edited by
                    #9

                    @SGaist hello,

                    When im debuging step by step, my program crashes here :

                    sftp = sftp_new(my_ssh_session); // Crash here : Segmentation fault

                    and qt creator switches to : Disassembler (ssh_socket_write)

                    0x61ae40bf  <+0x008f>        0f 84 5f 01 00 00              je     0x61ae4224 <ssh_socket_write+500>
                    0x61ae40c5  <+0x0095>        8b 50 0c                       mov    0xc(%eax),%edx  // error here ..
                    0x61ae40c8  <+0x0098>        85 d2                          test   %edx,%edx
                    0x61ae40ca  <+0x009a>        0f 84 54 01 00 00              je     0x61ae4224 <ssh_socket_write+500>
                    
                    1 Reply Last reply
                    0
                    • SGaistS Offline
                      SGaistS Offline
                      SGaist
                      Lifetime Qt Champion
                      wrote on last edited by
                      #10

                      Looks like you are trying to debug a release version of your app.

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

                      ODБOïO 1 Reply Last reply
                      2
                      • SGaistS SGaist

                        Looks like you are trying to debug a release version of your app.

                        ODБOïO Offline
                        ODБOïO Offline
                        ODБOï
                        wrote on last edited by
                        #11

                        @SGaist my bad
                        Thx

                        1 Reply Last reply
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