minishell/src/executing/simple_cmd/builtin_cd.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   builtin_cd.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: khais <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/03/31 16:20:17 by khais             #+#    #+#             */
/*   Updated: 2025/03/31 20:04:28 by khais            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "builtins.h"
#include "ft_printf.h"
#include "libft.h"
#include <unistd.h>
#include "../../env/env_manip.h"
#include "../../ft_errno.h"

static void	ft_chdir(char *path, t_minishell *app)
{
	if (path[0] == '\0')
		app->last_return_value = 0;
	else if (chdir(path) == 0)
		app->last_return_value = 0;
	else
	{
		app->last_return_value = 1;
		ft_errno(FT_EERRNO);
		ft_perror("minishell: cd");
	}
}

static void	chdir_home(t_minishell *app)
{
	char		*home;

	home = env_get_val(app->env, "HOME");
	if (home == NULL)
	{
		app->last_return_value = 1;
		ft_dprintf(STDERR_FILENO, "minishell: cd: HOME not set\n");
	}
	else
		ft_chdir(home, app);
}

t_builtin_type	builtin_cd(t_simple_cmd *cmd, t_minishell *app)
{
	t_worddesc	*arg;

	if (wordlist_get(cmd->words, 2) != NULL)
	{
		ft_dprintf(STDERR_FILENO, "minishell: cd: too many arguments\n");
		app->last_return_value = 1;
		return (BUILTIN_CD);
	}
	arg = wordlist_get(cmd->words, 1);
	if (arg == NULL)
		chdir_home(app);
	else
		ft_chdir(arg->word, app);
	return (BUILTIN_CD);
}