Tastaturabfrage in C++

[HaWe]

gerade auf dem Raspi (Raspbian Jessie) hab ich einiges (!!!) an source codes durchgetestet, bis was funktionierendes dabei war.
Letztlich funktioniert hat dieses hier:

/* 
 * rpiconio.h
 * mimics kbhit(), getch()
*/

#ifndef RPICONIO_H
#define   RPICONIO_H

#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <termio.h>
#include <unistd.h>

bool kbhit(void) {
    struct termios original;
    tcgetattr(STDIN_FILENO, &original);
    struct termios term;
    memcpy(&term, &original, sizeof(term));
    term.c_lflag &= ~ICANON;
    tcsetattr(STDIN_FILENO, TCSANOW, &term);
    int characters_buffered = 0;
    ioctl(STDIN_FILENO, FIONREAD, &characters_buffered);
    tcsetattr(STDIN_FILENO, TCSANOW, &original);
    bool pressed = (characters_buffered != 0);
    return pressed;
}

void echoOff(void) {
    struct termios term;
    tcgetattr(STDIN_FILENO, &term);
    term.c_lflag &= ~ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &term);
}

void echoOn(void) {
    struct termios term;
    tcgetattr(STDIN_FILENO, &term);
    term.c_lflag |= ECHO;
    tcsetattr(STDIN_FILENO, TCSANOW, &term);
}


#endif

Testcode:

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <wiringPi.h>

#include "rpiconio.h"

int main(void)
{
    long i=0;
    echoOff();
    int c = '\0';
    while (c != 'q')   {
        if (kbhit())
        {
            c = getchar();
            printf("(hier ggf. auskommentieren:) got key \'%c\'\n", c);
            if(c==27) { printf("\nuser break\n"); return 1;  }
        }
        printf("%ld\n", ++i);
        delay(100);
    }
    echoOn();    
    return 0;
}