#include <stdio.h>
#include <termios.h>
#include <term.h>
#include <curses.h>
#include <unistd.h>

static struct termios initial_settings, new_settings;
static int peek_character = -1;

void init_keyboard();
void close_keyboard();
int kbhit();
int readch();

int main()
{
   int ch = 0;

   init_keyboard();
   while (ch != 'q') {
        printf("looping\n");
        sleep(1);
        if (kbhit()) {
            ch = readch();
            printf("you hit %X : %c\n",ch,ch);
        }
    }
    close_keyboard();
    _exit(0);
}


void init_keyboard()
{
    tcgetattr(0, &initial_settings);
    new_settings = initial_settings;
    new_settings.c_lflag &= ~ICANON;
    new_settings.c_lflag &= ~ECHO;
    new_settings.c_lflag &= ~ISIG;
    new_settings.c_cc[VMIN] = 0;
    new_settings.c_cc[VTIME] = 0;
    tcsetattr(0, TCSANOW, &initial_settings);
}

void close_keyboard()
{
    tcsetattr(0, TCSANOW, &initial_settings);
}

int kbhit()
{
    char ch;
    int nread;

    if (peek_character != -1)
        return 1;
    new_settings.c_cc[VMIN]=0;
    tcsetattr(0, TCSANOW, &new_settings);
    nread = read(0, &ch, 1);
    new_settings.c_cc[VMIN]=1;
    tcsetattr(0, TCSANOW, &new_settings);

    if (nread == 1) {
        peek_character = ch;
        return 1;
    }
    return 0;
}


int readch()
{
    char ch;

    if (peek_character != -1) {
        ch = peek_character;
        peek_character = -1;
        return ch;
    }
    read(0, &ch, 1);
    return ch;
}