diff --git a/include/include.h b/include/include.h
index ceff3ef..6118011 100644
--- a/include/include.h
+++ b/include/include.h
@@ -6,7 +6,7 @@
 /*   By: jschaft <cecile.schaft@orange.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/23 14:15:12 by mcolonna          #+#    #+#             */
-/*   Updated: 2024/05/13 10:22:54 by jschaft          ###   ########.fr       */
+/*   Updated: 2024/05/15 18:10:34 by mcolonna         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -52,13 +52,11 @@ typedef struct s_command
 	int				output_fd; // fd to use with '>' redirection (1 by default)
 }					t_command;
 
-// To make a list of pipe when needed
+// An element of a list of pipes
 typedef struct s_pipes
 {
-	int		pipe[2]; // simple pipe
-	int		i; //index of the pipe
-	int		inout;	//in case of first or last pipe
-}					t_pipes;
+	int	pipe[2]; // Simple pipe, we write on pipe[1] and we read on pipe[0]
+}		t_pipes;
 
 // Return the t_command representing the command given by the user.
 // If error, return a t_command wth the value .error = true.
diff --git a/src/exec_command.c b/src/exec_command.c
index ee7823f..d36107d 100644
--- a/src/exec_command.c
+++ b/src/exec_command.c
@@ -6,7 +6,7 @@
 /*   By: jschaft <cecile.schaft@orange.fr>          +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/24 13:48:00 by jschaft           #+#    #+#             */
-/*   Updated: 2024/05/15 12:04:07 by mcolonna         ###   ########.fr       */
+/*   Updated: 2024/05/16 13:25:23 by mcolonna         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -26,75 +26,75 @@ static void	free_tab(char **tab)
 	free(tab);
 }
 
-// TODO is t_call.argv ended by NULL?
-static void	fork_exec(const char *path, t_call call, t_pipes in, t_pipes out,
-				 char *const envp[])
-{
-	if (in.i != 0)
-		dup2(in.pipe[1], 0);
-	else
-		dup2(in.inout, 0);
-	if (out.inout == 0)
-		dup2(out.pipe[0], 1);
-	else
-		dup2(out.inout, 1);
-	execve(path, call.argv, envp);
-}
-
-static int	execute_call(t_memclass mc, t_command cmd, t_pipes in, t_pipes out,
+// Execute the call with stdin = in and stdout = out.
+// Find the program in $PATH
+static int	execute_call(t_memclass mc, t_call call, int in, int out,
 					char *const envp[])
 {
 	char **const	path = get_path(envp);
 	pid_t			pid;
 	const char		*program_path;
-	int				status;
-	int				i;
 
-	i = in.i;
-	program_path = search_path(mc, (const char **)path, cmd.calls[i].program);
-	if (i == 0)
-		in.inout = cmd.input_fd;
-	if (out.inout == -1)
-		out.inout = cmd.output_fd;
+	program_path = search_path(mc, (const char **)path, call.program);
 	if (!program_path)
 		return (127);
 	pid = fork();
 	if (pid < 0)
 		return (1);
 	if (pid == 0)
-		fork_exec(program_path, cmd.calls[i], in, out, envp);
-	waitpid(pid, &status, 0);
+	{
+		dup2(in, 0);
+		dup2(out, 1);
+		execve(program_path, call.argv, envp);
+	}
 	free_tab(path);
 	return (0);
 }
 
-// TODO works with only one call (no pipe).
 int	execute_command(t_memclass mc, t_command command, char *const envp[])
 {
 	t_pipes		*pipes;
 	int			i;
+	int			nb_calls;
 
+	// get nb calls
+	nb_calls = 0;
+	while (command.calls[nb_calls].program != NULL)
+		nb_calls++;
+
+	// create pipes
+	pipes = malloc(sizeof(t_pipes) * (nb_calls + 1));
 	i = 0;
-	while (command.calls[i].program != NULL)
-		i++;
-	pipes = malloc(sizeof(t_pipes) * (i + 1));
-	i = 0;
-	while (command.calls[i].program != NULL)
-	{
+	pipes[i].pipe[0] = command.input_fd;
+	while (++i < nb_calls)
 		if (pipe(pipes[i].pipe) < 0)
 			return (exec_error());
-		pipes[i].inout = 0;
-		i++;
-	}
-	pipes[i].inout = -1;
+	pipes[i].pipe[1] = command.output_fd;
+	i = -1;
+
+	// call all programs
+	while (++i < nb_calls)
+		execute_call(mc, command.calls[i], pipes[i].pipe[0], pipes[i + 1].pipe[1], envp);
+
+	// close all
 	i = 0;
-	while (command.calls[i].program != NULL)
+	if (pipes[i].pipe[0] != 0)
+		close(pipes[i].pipe[0]);
+	while (++i < nb_calls)
 	{
-		pipes[i].i = i;
-		pipes[i + 1].i = i + 1;
-		execute_call(mc, command, pipes[i], pipes[i + 1], envp);
-		i++;
+		close(pipes[i].pipe[0]);
+		close(pipes[i].pipe[1]);
 	}
+	if (pipes[i].pipe[1] != 1)
+		close(pipes[i].pipe[1]);
+
+	// wait the end of all programs
+	i = nb_calls;
+	while (wait(NULL) != -1)
+		;
+	if (errno != ECHILD)
+		// TODO error
+
 	free(pipes);
 	return (0);
 }