void execute_cmd(char * args[], int bg){

    /* Relevant für Aufgabe 2 */
    /* clean up children and check if space available */
    if(update_children() >= children_amount){
        printf("Too many processes already running\n");
        return;
    }

    /* TODO Your code here -- Aufgabe 1 */
    int pid = fork();
    if(pid == 0) {
        char** argstemp = &args[1];
        execvp(args[0],argstemp);
    }
    else {
        if(!bg) {
            waitpid(pid, NULL, 0);
        }
        else {
            waitpid(pid,NULL, WNOHANG);
        }
    }
}