Use the (cin) user input to paste it in std::system and run a command with the input in another terminal

Question

int main() {
    string ip;
    cout << "IP to scan: ";
    cin >> ip;

    std::system(" nmap .... ")

    return 0;
}

so basicly I want the string ip to be used in an gnome ternimal so I can do for example and nmap scan of the ip that the user typed

its unclear what is the question. What happens when you just do what you want to do? Doesnt it work? — 463035818_is_not_an_ai, Aug 20 '18 at 10:26
_run a command with the input in another terminal_ Then you have to call `gterm` in `system()`. You can provide the command `nmap` as command line argument e.g. `system("gterm -e \"nmap .... \"");` or `system("gterm -x nmap .... ")`. Found this in doc.: [gnome-terminal - Options](http://manpages.ubuntu.com/manpages/cosmic/man1/gnome-terminal.1.html#options) — Scheff's Cat, Aug 20 '18 at 10:30

score 1 · Accepted Answer · answered Aug 20 '18 at 10:33

1

That can be easily done using string formatting:

int main() // ; << Note this is wrong!
{
    string ip;
    cout << "IP to scan: ";
    cin >> ip;

    std::ostringstream os;
    os << "nmap " << ip;

    std::system(os.str().c_str());

    // return 0; isn't necessary    
}

To run that command in a different terminal window, you have to call the terminal program with system(), as scheff mentioned in their comment

os << "gterm -e \"nmap " << ip "\"";
std::system(os.str().c_str());

answered Aug 20 '18 at 10:33

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stu.cpp: In function ‘int main()’: stu.cpp:11:24: error: aggregate ‘std::ostringstream os’ has incomplete type and cannot be defined std::ostringstream os; ^~ – Gilfoyle Aug 20 '18 at 10:39
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@TheUnknownGuy There are some includes missing: `#include ` `#include ` `#include `. – Scheff's Cat Aug 20 '18 at 10:42
@TheUnknownGuy Use `#include `. Also refer to the [documentation](https://en.cppreference.com/w/cpp/io/basic_ostringstream) for further questions please. – πάντα ῥεῖ Aug 20 '18 at 10:42
@TheUnknownGuy ...and you probably must insert `using namespace std;` before `main()`. – Scheff's Cat Aug 20 '18 at 10:45
@TheUnknownGuy I don't see what makes the difference regarding multiple inputs. Just use a loop or such. – πάντα ῥεῖ Aug 20 '18 at 16:33

Use the (cin) user input to paste it in std::system and run a command with the input in another terminal

1 Answers1