diff --git a/README.md b/README.md
index 27e4f4e..b723992 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,30 @@
 ## understanding some things :
 - [how to send EOF to stdin of a shell process](https://unix.stackexchange.com/questions/493578/how-to-send-d-eot-character-to-stdin-of-a-shell-process)
-  - [get root access 1](https://vitux.com/how-to-become-root-user-in-ubuntu-command-line-using-su-and-sudo/)
-  - [get root access using sudo su](https://superuser.com/questions/408990/how-do-i-log-out-of-sudo-su)
+	- [get root access 1](https://vitux.com/how-to-become-root-user-in-ubuntu-command-line-using-su-and-sudo/)
+	- [get root access using sudo su](https://superuser.com/questions/408990/how-do-i-log-out-of-sudo-su)
 - [what is a tty](https://www.howtogeek.com/428174/what-is-a-tty-on-linux-and-how-to-use-the-tty-command/)
 
+```
+                                 |     BASH       |    MINISHELL   |
+                                 -----------------------------------
+                                 | print | action | print | action |
+---------------|-----------------|----------------|----------------|
+               | SIGINT / ctrl-C |   ^C  |   \n   |   ^C  |  exit  |
+       prompt> |-----------------|----------------|----------------|
+               |    EOF / ctrl-D |  exit |  exit  |    Ø  |   \n   |
+---------------|-----------------|----------------|----------------|
+               | SIGINT / ctrl-C | bla^C |   \n   | bla^C |  exit  |
+prompt> blabla |-----------------|----------------|----------------|
+               |    EOF / ctrl-D |    Ø  |    Ø   |    Ø  |    Ø   |
+---------------|-----------------|----------------|----------------|
+
+-> change signal handler for SIGINT, to print a \n instead of exit
+-> change when readline receive an EOF and line is empty, to print exit and exit
+   -> when readline receive an EOF and line is empty, it return NULL
+   -> if line isn't empty it does nothing
+
+```
+
 ## sommaire :
 ---
 - [1. todo list :](#markdown-header-1-todo-list)
diff --git a/test_rl.c b/test_rl.c
deleted file mode 100644
index d0046c7..0000000
--- a/test_rl.c
+++ /dev/null
@@ -1,92 +0,0 @@
-# include <stdio.h>
-# include <stdlib.h>
-# include <unistd.h>
-# include <readline/readline.h>
-# include <signal.h>
-//# include <readline/history.h>
-//# include <fcntl.h>
-//# include <sys/ioctl.h>
-//# include <string.h>
-//# include <errno.h>
-//# include <sys/wait.h>
-//# include <sys/stat.h>
-//# include <sys/types.h>
-//# include <sys/time.h>
-//# include <sys/resource.h>
-//# include <dirent.h>
-//# include <termios.h>
-//# include <curses.h>
-//# include <term.h>
-
-void	handler_sigint(int id)
-{
-	(void)id;
-	write(1, "\n", 1);
-}
-
-int	main(int argc, char *argv[], char *envp[])
-{
-	(void)argc;
-	(void)argv;
-	char	*line_input;
-	char	*prompt;
-
-//	t_cmd				**cmd_arr;
-//	char				**envp;
-//	char				*prompt_base;
-//	char				*prompt;
-//	t_token				*token_list;
-//	int					last_exit_status;
-//	struct termios		ori_termios;
-//	struct termios		interactive_termios;
-//	int					termios_changed;
-//	struct sigaction	ori_signal_behaviour;
-//	struct sigaction	signal_behaviour;
-
-	signal(SIGINT, handler_sigint);
-	line_input = NULL;
-	prompt = strdup("\e[0;31mtest>\e[0m ");
-	while (1)
-	{
-		if (line_input)
-			free(line_input);
-		line_input = readline(prompt);
-		if (line_input && *line_input)
-		{
-			// A faire aprés être sortie du mode interactif
-			// - Ignorer tout les signaux
-			// - Remettre ori_termios
-//			c->signal_behaviour.sa_handler = SIG_IGN;
-//			sigaction(SIGINT, &c->signal_behaviour, NULL);
-//			sigaction(SIGQUIT, &c->signal_behaviour, NULL);
-//			tcsetattr(STDIN_FILENO, TCSANOW, &c->ori_termios);
-//			if (!fork())
-//			{
-//				char	*arg_test[3];
-//
-//				arg_test[0] = ft_strdup("sleep");
-//				arg_test[1] = ft_strdup("3");
-//				arg_test[2] = NULL;
-//				sigaction(SIGQUIT, &c->ori_signal_behaviour, NULL);
-//				sigaction(SIGINT, &c->ori_signal_behaviour, NULL);
-//				execve("/bin/sleep", arg_test, c->envp);
-//			}
-//			else
-//			{
-//				int	wait_test;
-//				wait(&wait_test);
-//				c->signal_behaviour.sa_handler = sigint_handler;
-//				sigaction(SIGINT, &c->signal_behaviour, NULL);
-//				c->signal_behaviour.sa_handler = SIG_IGN;
-//				sigaction(SIGQUIT, &c->signal_behaviour, NULL);
-//				tcsetattr(STDIN_FILENO, TCSANOW, &c->interactive_termios);
-//			}
-
-			printf("%s\n", line_input);
-		}
-		else if (!line_input)
-			write(1, "\n", 1);
-	}
-
-	return (0);
-}
diff --git a/test_rl_base.c b/test_rl_base.c
new file mode 100644
index 0000000..02d291f
--- /dev/null
+++ b/test_rl_base.c
@@ -0,0 +1,29 @@
+# include <stdlib.h>
+# include <unistd.h>
+# include <readline/readline.h>
+
+int	main(int argc, char *argv[], char *envp[])
+{
+	(void)argc;
+	(void)argv;
+	char	*line_input;
+	char	*prompt;
+
+	line_input = NULL;
+	prompt = strdup("\e[0;31mtest>\e[0m ");
+	while (1)
+	{
+		if (line_input)
+			free(line_input);
+		line_input = readline(prompt);
+		if (line_input && *line_input)
+		{
+			write(1, line_input, strlen(line_input));
+			write(1, "\n", 1);
+		}
+		else if (!line_input)
+			write(1, "\n", 1);
+	}
+
+	return (0);
+}
diff --git a/test_rl_modif.c b/test_rl_modif.c
new file mode 100644
index 0000000..097cb04
--- /dev/null
+++ b/test_rl_modif.c
@@ -0,0 +1,43 @@
+# include <stdlib.h>
+# include <unistd.h>
+# include <readline/readline.h>
+# include <signal.h>
+
+void	handler_sigint(int id)
+{
+	(void)id;
+	write(1, "\n", 1);
+	rl_replace_line("", 1);
+	rl_on_new_line();
+	rl_redisplay();
+}
+
+int	main(int argc, char *argv[], char *envp[])
+{
+	(void)argc;
+	(void)argv;
+	char	*line_input;
+	char	*prompt;
+
+	signal(SIGINT, handler_sigint);
+	line_input = NULL;
+	prompt = strdup("\e[0;31mtest>\e[0m ");
+	while (1)
+	{
+		if (line_input)
+			free(line_input);
+		line_input = readline(prompt);
+		if (line_input && *line_input)
+		{
+			write(1, line_input, strlen(line_input));
+			write(1, "\n", 1);
+		}
+		else if (!line_input)
+		{
+			write(1, "exit\n", 5);
+			exit(0);
+		}
+	}
+
+	return (0);
+}