허용 함수 정리

# include <readline>

readline, rl_clear_history, rl_on_new_line, rl_replace_line, rl_redisplay, add_history

# include <fcntl.h>

open, close

#include <unistd.h>

read, write, access, dup, dup2, execve, fork, pipe, unlink, getcwd, isatty, ttyslot, ttyname

#include <stdlib.h>

malloc, free, exit, getenv

# include <sys/wait.h>

wait, waitpid, wait3, wait4

# include <signal.h>

signal, sigaction, sigemptyset, sigaddset, kill

# include <direct.h>

chdir

# include <sys/stat.h>

stat, lstat, fstat

# include <dirent.h>

opendir, readdir, closedir

#include <string.h>

strerror

#include <stdio.h>

perror, printf

# include <sys/ioctl.h>

ioctl

# include <termios.h>

tcsetattr, tcgetattr

# include <term.h>

tgetent, tgetflag, tgetnum, tgetstr, tgoto, tputs