yo_cd.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   yo_cd.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: abuzdin <abuzdin@student.s19.be>           +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/07/20 09:31:43 by abuzdin           #+#    #+#             */
/*   Updated: 2022/08/12 15:41:25 by abuzdin          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "minishell.h"

// update for char** envp
static void	update_envp(t_input *data, char *pwd, char *oldpwd)
{
	int	i;

	i = 0;
	while (data->envp[i] && ft_strncmp(data->envp[i], "PWD", 3))
		++i;
	if (data->envp[i])
	{
		free(data->envp[i]);
		data->envp[i] = ms_strdup("PWD=", data);
		data->envp[i] = ms_strjoin_free(data->envp[i], pwd, data);
	}
	i = 0;
	while (data->envp[i] && ft_strncmp(data->envp[i], "OLDPWD", 3))
		++i;
	if (data->envp[i])
	{
		free(data->envp[i]);
		data->envp[i] = ms_strdup("OLDPWD=", data);
		data->envp[i] = ms_strjoin_free(data->envp[i], oldpwd, data);
	}
	free(pwd);
}

static void	getpwd_error(void)
{
	write(2, "YAMSP: ", 7);
	perror("pwd");
	g_status = 1;
	return ;
}

// update for linked lists envp
static void	update_pwd(t_input *data)
{
	char	*pwd;
	char	*oldpwd;

	pwd = NULL;
	pwd = getcwd(NULL, 0);
	if (!pwd)
		return (getpwd_error());
	data->envp_tmp = data->envp_n;
	while (data->envp_tmp && ft_strcmp(data->envp_tmp->type, "PWD"))
		data->envp_tmp = data->envp_tmp->next;
	if (data->envp_tmp && !ft_strcmp(data->envp_tmp->type, "PWD"))
	{
		oldpwd = data->envp_tmp->value;
		data->envp_tmp->value = ms_strdup(pwd, data);
	}
	data->envp_tmp = data->envp_n;
	while (data->envp_tmp && ft_strcmp(data->envp_tmp->type, "OLDPWD"))
		data->envp_tmp = data->envp_tmp->next;
	if (data->envp_tmp && !ft_strcmp(data->envp_tmp->type, "OLDPWD"))
	{
		free(data->envp_tmp->value);
		data->envp_tmp->value = oldpwd;
	}
	update_envp(data, pwd, oldpwd);
}

static void	cd_home(t_input *data)
{
	data->envp_tmp = data->envp_n;
	while (data->envp_tmp)
	{
		if (!ft_strcmp(data->envp_tmp->type, "HOME"))
		{
			if ((chdir(data->envp_tmp->value)))
			{
				write(2, "YAMSP: ", 7);
				perror("cd");
				g_status = 1;
				return ;
			}
			break ;
		}
		data->envp_tmp = data->envp_tmp->next;
	}
	if (!data->envp_tmp)
	{
		write(2, "YAMSP: cd: HOME not set\n", 24);
		g_status = 1;
		return ;
	}
	update_pwd(data);
}

int	yo_cd(t_input *data)
{
	g_status = 0;
	if (!data->cmds->cmd[1])
	{
		cd_home(data);
		return (0);
	}
	else if (chdir(data->cmds->cmd[1]))
	{
		write(2, "YAMSP: cd: ", 11);
		write(2, data->cmds->cmd[1], ft_strlen(data->cmds->cmd[1]));
		write(2, ": ", 2);
		perror(NULL);
		g_status = 1;
		return (g_status);
	}
	// for linux
	// else if (data->cmds->len_cmd > 2)
	// {
	// 	write(2, "YAMSP: cd: too many arguments\n", 30);
	// 	g_status = 1;
	// 	return (g_status);
	// }
	update_pwd(data);
	return (0);
}