builtin_cd_utils.c

Bu dosyanın dokümantasyonuna git.

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   builtin_cd_utils.c                                 :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hgenc <hgenc@student.42kocaeli.com.tr>     +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2026/03/09 18:10:00 by hgenc             #+#    #+#             */
/*   Updated: 2026/03/09 18:10:00 by hgenc            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "../../include/minishell.h"
#include <stdlib.h>
#include <unistd.h>
 
static char *build_path(char **stack, int top)
{
    char    *result;
    char    *tmp;
    int     i;
 
    result = ft_strdup("");
    i = 0;
    while (i < top && result)
    {
        tmp = ft_strjoin(result, "/");
        free(result);
        if (!tmp)
            result = ft_strjoin("", stack[i]);
        else
            result = ft_strjoin(tmp, stack[i]);
        free(tmp);
        i++;
    }
    if (!result || !result[0])
    {
        free(result);
        return (ft_strdup("/"));
    }
    return (result);
}
 
char    *normalize_logical_path(char *path)
{
    char    **segs;
    char    *stack[512];
    int     top;
    int     i;
    char    *result;
 
    segs = ft_split(path, '/');
    if (!segs)
        return (NULL);
    top = 0;
    i = 0;
    while (segs[i])
    {
        if (ft_strcmp(segs[i], "..") == 0)
        {
            if (top > 0)
                top--;
        }
        else if (segs[i][0] && ft_strcmp(segs[i], ".") != 0)
            stack[top++] = segs[i];
        i++;
    }
    result = build_path(stack, top);
    free_str_array(segs);
    return (result);
}
 
char    *compute_logical_pwd(t_shell *shell, char *arg)
{
    char    *base;
    char    *joined;
    char    *result;
 
    if (!arg)
        return (NULL);
    if (arg[0] == '/')
        return (normalize_logical_path(arg));
    base = get_env_value(shell->env_list, "PWD");
    if (!base)
        base = "";
    joined = ft_strjoin(base, "/");
    if (!joined)
        return (NULL);
    result = ft_strjoin(joined, arg);
    free(joined);
    if (!result)
        return (NULL);
    joined = normalize_logical_path(result);
    free(result);
    return (joined);
}
 
void    update_pwd_vars(t_shell *shell, char *old_pwd, char *new_pwd)
{
    char    *old_dup;
 
    if (!old_pwd)
        old_dup = ft_strdup("");
    else
        old_dup = ft_strdup(old_pwd);
    update_env_value(shell->env_list, "PWD", new_pwd);
    update_env_value(shell->env_list, "OLDPWD", old_dup);
    free(old_dup);
}
 
int change_dir(t_shell *shell, char *new_pwd)
{
    char    *old_pwd;
 
    old_pwd = get_env_value(shell->env_list, "PWD");
    update_pwd_vars(shell, old_pwd, new_pwd);
    free(new_pwd);
    return (0);
}