open_pipes() bugfix

+ write "exit" to STDERR (like bash)
+ set_last_exit_status() on CTRL-C

srcs/exec/pipeline.c

@@ -45,7 +45,7 @@ static int	open_pipes(t_cmd *pipeline[])
 		else
 			if (close(pipes[STDOUT_FILENO]) == -1)
 				perror("close()");
-		if (pipeline[i]->fd_in == STDIN_FILENO)
+		if (pipeline[i + 1]->fd_in == STDIN_FILENO)
 			pipeline[i + 1]->fd_in = pipes[STDIN_FILENO];
 		else
 			if (close(pipes[STDIN_FILENO]) == -1)

srcs/shell_loop.c

@@ -53,7 +53,7 @@ static char	*read_input(char *prompt, t_all *c)
 	sigaction(SIGINT, &signal_behaviour, NULL);
 	if (!line_input)
 	{
-		write(1, "exit\n", 5);
+		write(STDERR_FILENO, "exit\n", 5);
 		exit_free(c, get_last_exit_status());
 	}
 	return (line_input);

srcs/signals.c

@@ -14,11 +14,11 @@
 
 void	sigint_handler_interactive(int signum)
 {
-	(void)signum;
 	write(1, "\n", 1);
 	rl_on_new_line();
 	rl_replace_line("", 1);
 	rl_redisplay();
+	set_last_exit_status(EXIT_SIGNAL + signum);
 }
 
 void	sigint_handler_heredoc(int signum)