main.cpp

#include <iostream>

#include <unistd.h>
#include <limits.h>
#include <sys/utsname.h>

int main(int argc, char* argv[]) {
    std::string s = argv[0];
    std::size_t idx = s.find_last_of("/");
    std::string ss = s.substr(0, idx);
    std::cout << ss << std::endl;

    struct utsname unam;
    char hostname[HOST_NAME_MAX];
    char username[LOGIN_NAME_MAX];
    gethostname(hostname, HOST_NAME_MAX);
    getlogin_r(username, LOGIN_NAME_MAX);
    uname(&unam);

    std::cout << username << "@" << hostname << std::endl;
    std::cout << unam.domainname << std::endl;
    std::cout << unam.machine << std::endl;
    std::cout << unam.nodename << std::endl;
    std::cout << unam.release << std::endl;
    std::cout << unam.sysname << std::endl;
    std::cout << unam.version << std::endl;

    return 0;
}