tests ok pour modifier fonctionnement de minishell

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)