vector<string> args;

    /* code that correctly parses args from user input */

    pid_t kidpid = fork();
    if (kidpid < 0)
    {
        perror("Internal error: cannot fork.");
        return -1;
    }
    else if (kidpid == 0)
    {
        // I am the child.

        vector<char*>argcs;
        for(int i=1;i<args.size();i++)
        {
            char * temp = new char[args.at(i).length()];
            for(int k=0;k<args.at(i).length();k++)
            {
                temp[k] = args.at(i).at(k);
            }
            argcs.push_back(temp);
        }

        char** argv = new char*[argcs.size() + 1];
        for (int i = 0; i < argcs.size(); i++)
        {
            argv[i] = argcs[i];
        }
        argv[args.size()] = NULL;

        execvp(program, args);

        return -1;
    }