diff --git a/Makefile b/Makefile
index 892938b..fd56e97 100644
--- a/Makefile
+++ b/Makefile
@@ -5,9 +5,11 @@ CC = clang
 CFLAGS = -Wall -Wextra $(INCLUDES) -g # add -Werror, del -g
 
 VPATH  = $(DIR_SRCS)
-DIR_SRCS =	srcs srcs/builtins srcs/lexing \
+DIR_SRCS =	srcs srcs/builtins \
+			srcs/lexing \
 			srcs/parsing srcs/parsing/valid_syntax \
-			srcs/parsing/expansions srcs/parsing/redirections
+			srcs/parsing/expansions srcs/parsing/redirections \
+			srcs/exec
 
 INCLUDES = -I$(HEADERS_D) -I$(LIBFT_D)
 
diff --git a/libft b/libft
index 56b4037..d58ee38 160000
--- a/libft
+++ b/libft
@@ -1 +1 @@
-Subproject commit 56b403736934a9ef2552671986afb77223f3cfeb
+Subproject commit d58ee38bab0a9e0449d98efc9522b124c71632fd
diff --git a/srcs/exec_cmd_line.c b/srcs/exec/exec_cmd_line.c
similarity index 62%
rename from srcs/exec_cmd_line.c
rename to srcs/exec/exec_cmd_line.c
index 49c1796..f532117 100644
--- a/srcs/exec_cmd_line.c
+++ b/srcs/exec/exec_cmd_line.c
@@ -6,7 +6,7 @@
 /*   By: lperrey <lperrey@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2021/11/16 01:57:38 by lperrey           #+#    #+#             */
-/*   Updated: 2021/11/17 01:08:38 by lperrey          ###   ########.fr       */
+/*   Updated: 2021/11/18 12:31:04 by lperrey          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -17,7 +17,7 @@
 
 int		pipeline(t_all *c);
 int		open_pipes(t_cmd *pipeline[]);
-int		pipeline_access_cmd(t_cmd *pipeline[], char *path[]);
+int		pipeline_find_access(t_cmd *pipeline[], char *path[]);
 pid_t	pipeline_exec(t_cmd *pipeline[], t_all *c);
 int		cmd_exec_in_subshell(t_cmd *cmd, t_all *c);
 int		simple_cmd_builtin(t_cmd *cmd, t_all *c);
@@ -37,18 +37,19 @@ int	pipeline(t_all *c)
 {
 	if (!open_pipes(c->cmd_arr))
 		return (0);
-	if (!pipeline_access_cmd(c->cmd_arr, c->path))
+	if (!pipeline_find_access(c->cmd_arr, c->path))
 		return (0);
 	if (ft_2d_arrlen(pipeline) == 1 && c->cmd_arr[0]->builtin_func)
-	{
 		simple_cmd_builtin(c->cmd_arr[0], c);
-		free_pipeline(&c->cmd_arr);
-	}
 	else
-	{
 		wait_subshell(pipeline_exec(c->cmd_arr, c), &c->last_exit_status);
-		free_pipeline(&c->cmd_arr);
-	}
+	free_pipeline(&c->cmd_arr);
+	return (1);
+}
+
+int	simple_cmd_builtin(t_cmd *cmd, t_all *c)
+{
+	// TODO
 	return (1);
 }
 
@@ -77,19 +78,110 @@ int	open_pipes(t_cmd *pipeline[])
 	return (1);
 }
 
-int	pipeline_access_cmd(t_cmd *pipeline[], char *path[])
+// https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_08_02
+// faire des test sur la valeur de errno selon les cas (if directory, if pathname invalid, ...)
+int	handle_access_error(char *file_name)
 {
-	// TODO
-	// Penser à :	path = strdup(argv[0]);
-	// et non :		path = argv[0];
-	// pour ne pas double free
+	int	tmp;
 
+	tmp = errno;
+	ft_perror_io("minishell: ", file_name);
+	errno = tmp;
+	if (errno == EACCES)
+		return (127);
+	return (1);
+	// 126
+}
+
+static t_builtin_f	search_builtin(char *cmd_name)
+{
+	if (ft_strncmp(cmd_name, "echo", 4 + 1) == 0)
+		return (&builtin_echo);
+	else if (ft_strncmp(cmd_name, "cd", 2 + 1) == 0)
+		return (&builtin_cd);
+	else if (ft_strncmp(cmd_name, "pwd", 3 + 1) == 0)
+		return (&builtin_pwd);
+	else if (ft_strncmp(cmd_name, "export", 6 + 1) == 0)
+		return (&builtin_export);
+	else if (ft_strncmp(cmd_name, "unset", 5 + 1) == 0)
+		return (&builtin_unset);
+	else if (ft_strncmp(cmd_name, "env", 3 + 1) == 0)
+		return (&builtin_env);
+	else if (ft_strncmp(cmd_name, "exit", 4 + 1) == 0)
+		return (&builtin_exit);
+	return (NULL);
+}
+
+static int	search_cmd_path(char *cmd_name, char **cmd_path, char *path[])
+{
+	int	i;
+
+	if (!path)
+		return (1);
+	cmd_name = ft_strjoin("/", cmd_name);
+	if (!cmd_name)
+		return (ft_reti_perror(-1, "search_cmd_path()"));
+	i = 0;
+	while (path[i])
+	{
+		*cmd_path = ft_strjoin(path[i], cmd_name);
+		if (!*cmd_path)
+			return (ft_reti_perror(-1, "search_cmd_path()"));
+		if (access(*cmd_path, X_OK) == 0)
+			break ;
+		else
+		{
+			free(*cmd_path);
+			*cmd_path = NULL; // TODO : free_null()
+		}
+		i++;
+	}
+	free(cmd_name);
 	return (1);
 }
 
-int	simple_cmd_builtin(t_cmd *cmd, t_all *c)
+int	cmd_find_access(t_cmd *cmd, char *path[])
 {
-	// TODO
+	if (ft_strchr(cmd->argv[0], '/'))
+	{
+		if (access(cmd->argv[0], X_OK) == -1)
+			cmd->error = handle_access_error(cmd->argv[0]);
+		else
+		{
+			cmd->path = ft_strdup(cmd->argv[0]);
+			if (!cmd->path) 
+				return (0);
+		}
+	}
+	else
+	{
+		cmd->builtin_func = search_builtin(cmd->argv[0]);
+		if (cmd->builtin_func)
+			return (1);
+		if (search_cmd_path(cmd->argv[0], &cmd->path, path) == -1)
+			return (0);
+		if (!cmd->path)
+		{
+			cmd->error = 127;
+			ft_putstr_fd("minishell: ", 2);
+			ft_putstr_fd(cmd->argv[0], 2);
+			ft_putstr_fd(": command not found\n", 2);
+		}
+	}
+	return (1);
+}
+
+int	pipeline_find_access(t_cmd *pipeline[], char *path[])
+{
+	int	i;
+
+	i = 0;
+	while (pipeline[i])
+	{
+		if (!cmd_find_access(pipeline[i], path))
+			return (0);
+		i++;
+	}
 	return (1);
 }
 
@@ -134,7 +226,7 @@ void	wait_subshell(pid_t last_cmd_pid, int *last_exit_status)
 	int	wstatus;
 	int	ret;
 
-	//wstatus = 0;
+	wstatus = 0;
 	if (last_cmd_pid > 0)
 	{
 		if (waitpid(last_cmd_pid, &wstatus, 0) == -1)
@@ -174,10 +266,8 @@ int	cmd_exec_in_subshell(t_cmd *cmd, t_all *c)
 		close_pipeline_fd(c->cmd_arr);
 		if (cmd->builtin_func)
 			free_exit(c, cmd->builtin_func(ft_2d_arrlen(cmd->argv), cmd->argv,c));
-		else if (execve("/bin/echo", cmd->argv, c->envp) == -1) // WIP, TEST
+		else if (execve(cmd->path, cmd->argv, c->envp) == -1)
 			return (ft_reti_perror_io(EXIT_FAILURE, "execve() ", cmd->argv[0]));
-		//else if (execve(cmd->path, cmd->argv, c->envp) == -1)
-		//	return (ft_reti_perror_io(EXIT_FAILURE, "execve() ", cmd->argv[0]));
 	}
 	return (EXIT_SUCCESS);
 }
diff --git a/srcs/free.c b/srcs/free.c
index b933fc4..aec90fa 100644
--- a/srcs/free.c
+++ b/srcs/free.c
@@ -6,7 +6,7 @@
 /*   By: lperrey <lperrey@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2021/10/10 23:53:17 by lperrey           #+#    #+#             */
-/*   Updated: 2021/11/17 01:25:35 by lperrey          ###   ########.fr       */
+/*   Updated: 2021/11/18 03:09:46 by lperrey          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -16,7 +16,7 @@ int	free_exit(t_all *c, int exit_status)
 {
 	free(c->prompt_base);
 	free(c->prompt);
-	ft_lstclear((t_list **)&c->token_list, free); // a voir avec Hugo, il y a un truc qui me semble superflu dans la fonction
+	ft_lstclear((t_list **)&c->token_list, free);
 	ft_free_2d_arr(c->envp);
 	ft_free_2d_arr(c->path);
 	free_pipeline(&c->cmd_arr);
diff --git a/srcs/parsing/expansions/new_token_for_each_field.c b/srcs/parsing/expansions/new_token_for_each_field.c
index 38298b9..90db9a9 100644
--- a/srcs/parsing/expansions/new_token_for_each_field.c
+++ b/srcs/parsing/expansions/new_token_for_each_field.c
@@ -56,7 +56,7 @@ static t_token	*insert_tokens(t_token *t, t_token *insert_lst)
 
 	t->id = 0;
 	free(t->content);
-	t->content = NULL;
+	t->content = NULL; // TODO : free_null()
 	if (!insert_lst)
 		return (t);
 
diff --git a/srcs/shell_loop.c b/srcs/shell_loop.c
index f60c5b0..9aae71c 100644
--- a/srcs/shell_loop.c
+++ b/srcs/shell_loop.c
@@ -34,6 +34,8 @@ void	shell_loop(t_all *c)
 			add_history(line_input);
 			// Lexing
 			c->token_list = input_to_tokens(line_input);
+			free(line_input);
+			line_input = NULL; // TODO : free_null()
 			if (!c->token_list)
 				continue ;
 			// Parsing