update for builtins and extra functions

1 files changed, 82 insertions, 0 deletions

diff --git a/src/builtins_part_two.c b/src/builtins_part_two.c
new file mode 100644
index 0000000..94ef258
--- /dev/null
+++ b/src/builtins_part_two.c
@@ -0,0 +1,82 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   builtins_part_two.c                                :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: chuhlig <chuhlig@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/25 20:52:16 by chuhlig           #+#    #+#             */
+/*   Updated: 2024/10/25 20:52:46 by chuhlig          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "env.h"
+
+void	update_oldpwd(t_env **env)
+{
+	t_env	*current;
+	t_env	*prev;
+	char	cwd[1028];
+	char	*tmp;
+
+	while (current)
+	{
+		if (ft_strncmp(current->name, "OLDPWD", 6) == 0)
+			break ;
+		prev = current;
+		current = current->next;
+	}
+	getcwd(cwd, sizeof(cwd));
+	tmp = ft_strdup(cwd);
+	free(current->value);
+	current->value = tmp;
+}
+
+void	update_pwd(t_env **env)
+{
+	t_env	*current;
+	t_env	*prev;
+	char	cwd[1028];
+	char	*tmp;
+
+	while (current)
+	{
+		if (ft_strncmp(current->name, "PWD", 3) == 0)
+			break ;
+		prev = current;
+		current = current->next;
+	}
+	getcwd(cwd, sizeof(cwd));
+	tmp = ft_strdup(cwd);
+	free(current->value);
+	current->value = tmp;
+}
+
+int	cd(t_env **env, char **av)
+{
+	t_env	*current;
+	t_env	*prev;
+	t_env	*pwd;
+
+	current = env;
+	if (av[1] == NULL)
+	{
+		update_oldpwd(&env);
+		while (current)
+		{
+			if (ft_strncmp(current->name, "HOME", 4) == 0)
+				break ;
+			prev = current;
+			current = current->next;
+		}
+		if (chdir(current->value) == -1)
+			return ;
+	}
+	else
+	{
+		update_oldpwd(&env);
+		if (chdir(av[1]) == -1)
+			return ;
+		update_pwd(&env);
+	}
+}
\ No newline at end of file