#include <termios.h>
#include <stdio.h>

int main(void)
{
    struct termios t;
    tcgetattr(0 /* standard input */, &t);
    t.c_lflag &= ~ICANON;
    tcsetattr(0, TCSANOW, &t);
    while (getchar() != 27 /* <Escape> */) putchar('\n');
    putchar('\n');
    return 0;
}