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  4. How to set ip address to a computer in Qt (Solved)
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How to set ip address to a computer in Qt (Solved)

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  • p3c0P Offline
    p3c0P Offline
    p3c0
    Moderators
    wrote on last edited by
    #17

    Does that command work from outside ?

    157

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    • H Offline
      H Offline
      houmingc
      wrote on last edited by
      #18

      cat passwd.txt return my password correct

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      0
      • H Offline
        H Offline
        houmingc
        wrote on last edited by
        #19

        cat passwd.txt return my password correct

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        0
        • H Offline
          H Offline
          houmingc
          wrote on last edited by
          #20

          it works when i do a sudo su
          it doesn't work without permission, what should i do next?

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          • H Offline
            H Offline
            houmingc
            wrote on last edited by
            #21

            it works when i do a sudo su
            it doesn't work without permission, what should i do next?

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            • p3c0P Offline
              p3c0P Offline
              p3c0
              Moderators
              wrote on last edited by
              #22

              It does work for me from the App and Outside
              @
              args<<"-c"<<
              "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
              @

              There should be a space before and after < in above command.

              157

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              • p3c0P Offline
                p3c0P Offline
                p3c0
                Moderators
                wrote on last edited by
                #23

                It does work for me from the App and Outside
                @
                args<<"-c"<<
                "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
                @

                There should be a space before and after < in above command.

                157

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                • H Offline
                  H Offline
                  houmingc
                  wrote on last edited by
                  #24

                  under /opt
                  cat >password.txt 'Key in my password'
                  cat password 'Check my password'

                  its work, thanks alot :>>

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                  • H Offline
                    H Offline
                    houmingc
                    wrote on last edited by
                    #25

                    under /opt
                    cat >password.txt 'Key in my password'
                    cat password 'Check my password'

                    its work, thanks alot :>>

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                    • p3c0P Offline
                      p3c0P Offline
                      p3c0
                      Moderators
                      wrote on last edited by
                      #26

                      Well then get the errors using readyReadStandardError() signal if any.

                      157

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                      • p3c0P Offline
                        p3c0P Offline
                        p3c0
                        Moderators
                        wrote on last edited by
                        #27

                        Well then get the errors using readyReadStandardError() signal if any.

                        157

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                        • H Offline
                          H Offline
                          houmingc
                          wrote on last edited by
                          #28

                          what does "-c" in front of "sudo -s" meant or used for??

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                          • H Offline
                            H Offline
                            houmingc
                            wrote on last edited by
                            #29

                            what does "-c" in front of "sudo -s" meant or used for??

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                            • p3c0P Offline
                              p3c0P Offline
                              p3c0
                              Moderators
                              wrote on last edited by
                              #30

                              It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.

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                              • p3c0P Offline
                                p3c0P Offline
                                p3c0
                                Moderators
                                wrote on last edited by
                                #31

                                It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.

                                157

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                                • H Offline
                                  H Offline
                                  houmingc
                                  wrote on last edited by houmingc
                                  #32

                                  QProcess Class is used to start external programs and to communicate with them.
                                  create a new QProcess and input args to /bin/sh.
                                  Below code has been tested working.
                                  Thanks to p3c0, if not, answer below will not be available :

                                  QProcess *myProcess = new QProcess;
                                  QStringList args;
                                  args<"-c"<<"sudo -S ifconfig eth0 192.168.100.1 < /var/passwd.txt");
                                  myProcess->start("/bin/sh",args);
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