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

int main(void)
{
   struct termios term_descr;

   if (tcgetattr(fileno(stdin), &term_descr) != 0) {
      perror("tcgetattr");
   }

   term_descr.c_lflag &= ~ICANON;
   term_descr.c_cc[VMIN] = 0;
   term_descr.c_cc[VTIME] = 0;

   if (tcsetattr(fileno(stdin), TCSANOW, &term_descr) != 0) {
      perror("tcsetattr");
   }

   char c;
   while (1) {
      if (fread(&c, 1, 1, stdin) == 1) {
         printf("got char: %c\n", c);
         break;
      } else {
         puts("nothing...");
      }
      sleep(1);
   }

   return (0);
}