update: functions done: echo + echo -n, pwd, exit with and without arguments / parser appears to work, test with commands and local files (only tested with ls -l)

include/builtins.h

@@ -0,0 +1,60 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   builtins.h                                         :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: sede-san <sede-san@student.42madrid.com    +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/08/01 17:18:21 by sede-san          #+#    #+#             */
+/*   Updated: 2025/08/02 17:55:22 by sede-san         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef BUILTINS_H
+# define BUILTINS_H
+
+# include <string.h>
+# include <stdio.h>
+
+typedef int	(*t_builtin_func)(int argc, char const *argv[]);
+
+typedef struct s_builtin
+{
+	const char		*name;
+	t_builtin_func	function;
+}				t_builtin;
+
+// cd.c
+
+int	cd_builtin(int argc, char const *argv[]);
+
+// echo.c
+
+typedef struct s_echo_flags
+{
+	int	newline;	// print newline after everything has been printed
+}				t_echo_flags;
+
+int	echo_builtin(int argc, char const *argv[]);
+
+// env.c
+
+int	env_builtin(int argc, char const *argv[]);
+
+// exit.c
+
+int	exit_builtin(int argc, char const *argv[]);
+
+// export.c
+
+int	export_builtin(int argc, char const *argv[]);
+
+// pwd.c
+
+int	pwd_builtin(int argc, char const *argv[]);
+
+// unset.c
+
+int	unset_builtin(int argc, char const *argv[]);
+
+#endif