delete key의 인식에 대한 질문입니다.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
 
static struct termios tin;
 
static void terminal_set(void)
{
   // save terminal configuration
   tcgetattr(STDIN_FILENO, &tin);
 
   static struct termios tlocal;
   memcpy(&tlocal, &tin, sizeof(tin));
   cfmakeraw(&tlocal);
   tcsetattr(STDIN_FILENO,TCSANOW,&tlocal);
}
 
static void terminal_reset(void)
{
   // restore terminal upon exit
   tcsetattr(STDIN_FILENO,TCSANOW,&tin);
}
 
 
int main(void)
{
   unsigned char buf[10];
 
   terminal_set();
   atexit(terminal_reset);
 
   while (1)
   {
      buf[0] = fgetc(stdin);
      printf("buf[0] = %x", buf[0]);
      if (buf[0] == 0x61)
         break;
   }
 
   return 0;
}