builtin_cd.c

Bu dosyanın dokümantasyonuna git.

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   builtin_cd.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hgenc <hgenc@student.42kocaeli.com.tr>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/01/17 18:47:00 by hgenc             #+#    #+#             */
/*   Updated: 2026/03/09 18:10:00 by hgenc            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "../../include/minishell.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
 
static int  cd_home(t_shell *shell)
{
    char    *home;
 
    home = get_env_value(shell->env_list, "HOME");
    if (!home)
    {
        shell_error("cd", NULL, "HOME not set");
        return (1);
    }
    if (chdir(home) == -1)
    {
        perror("minishell: cd");
        return (1);
    }
    return (change_dir(shell, ft_strdup(home)));
}
 
static int  cd_oldpwd(t_shell *shell)
{
    char    *oldpwd;
 
    oldpwd = get_env_value(shell->env_list, "OLDPWD");
    if (!oldpwd)
    {
        shell_error("cd", NULL, "OLDPWD not set");
        return (1);
    }
    if (chdir(oldpwd) == -1)
    {
        shell_error("cd", oldpwd, "No such file or directory");
        return (1);
    }
    ft_putendl_fd(oldpwd, STDOUT_FILENO);
    return (change_dir(shell, ft_strdup(oldpwd)));
}
 
static int  cd_path(t_shell *shell, char *arg)
{
    char    *new_pwd;
 
    new_pwd = compute_logical_pwd(shell, arg);
    if (!new_pwd)
    {
        if (chdir(arg) == -1)
        {
            shell_error("cd", arg, "No such file or directory");
            return (1);
        }
        return (change_dir(shell, ft_strdup(arg)));
    }
    if (chdir(new_pwd) == -1)
    {
        shell_error("cd", arg, "No such file or directory");
        free(new_pwd);
        return (1);
    }
    return (change_dir(shell, new_pwd));
}
 
int builtin_cd(t_shell *shell, t_cmd *cmd)
{
    if (!cmd->args[1])
        return (cd_home(shell));
    if (!cmd->args[1][0])
    {
        shell_error("cd", "", "No such file or directory");
        return (1);
    }
    if (cmd->args[2])
    {
        shell_error("cd", NULL, "too many arguments");
        return (2);
    }
    if (ft_strcmp(cmd->args[1], "-") == 0)
        return (cd_oldpwd(shell));
    return (cd_path(shell, cmd->args[1]));
}