keytest.c

//# kilo step 8
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <termios.h>
#include <unistd.h>

struct termios orig_termios;

void disableRawMode() { tcsetattr(STDIN_FILENO, TCSAFLUSH, &orig_termios); }

void enableRawMode() {
   tcgetattr(STDIN_FILENO, &orig_termios);
   atexit(disableRawMode);

   struct termios raw = orig_termios;
   raw.c_lflag &= ~(ECHO | ICANON);

   tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw);
}

int main() {
   enableRawMode();

   char c;
   while (read(STDIN_FILENO, &c, 1) == 1 && c != 'q') {
      if (iscntrl(c)) {
         printf("%d\n", c);
      } else {
         printf("%d ('%c')\n", c, c);
      }
   }

   return 0;
}