42_minishell/builtins/export.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   export.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/14 14:27:08 by cchauvet          #+#    #+#             */
/*   Updated: 2023/03/13 13:09:13 by erey-bet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./builtins_private.h"

static int	error(char *str)
{
	write(2, "bash: export: `", 15);
	write(2, str, ft_strlen(str));
	write(2, "': not a valid identifier\n", 26);
	return (1);
}

void	print_export(t_list **env, int fd)
{
	t_list	*current;

	current = *env;
	while (current->next != NULL)
	{
		write(fd, "declare -x ", 11);
		ft_putstr_fd(((t_env *)(current->content))->key, fd);
		if (((t_env *)(current->content))->value != NULL)
		{
			ft_putstr_fd("=", fd);
			write(fd, "\"", 1);
			ft_putstr_fd(((t_env *)(current->content))->value, fd);
			write(fd, "\"\n", 2);
		}
		else
			write(fd, "\n", 2);
		current = current->next;
	}
}

int	set_key_value_export(t_list **env, char *args, char **key, char **value)
{
	*key = ft_strndup(args, ft_strnchr(args, '='));
	if (*key == NULL)
		return (1);
	if (ft_strlen(*key) == 0)
		return (1);
	if (possible_key(*key) == 2)
	{
		(*key)[ft_strlen(*key) - 1] = '\0';
		if (get_value_by_key(*key, env) == NULL)
			*value = ft_strdup(ft_strchr(args, '=') + 1);
		else
			*value = ft_strjoin(get_value_by_key(*key, env),
					ft_strchr(args, '=') + 1);
	}
	else
		*value = ft_strdup(ft_strchr(args, '=') + 1);
	return (0);
}

int	add_export(t_list **env, char *args, int fd)
{
	char	*key;
	char	*value;

	if (ft_strchr(args, '=') != NULL)
	{
		if (set_key_value_export(env, args, &key, &value))
			return (error(args));
	}
	else
	{
		key = ft_strdup(args);
		value = get_value_by_key(key, env);
		if (value != NULL)
			value = ft_strdup(value);
		if (possible_key(key) == 2)
			return (error(key));
	}
	if (!possible_key(key))
		return (error(args));
	create_value_by_key(key, value, env);
	return (0);
}

int	ft_export(t_list **env, char **args, int fd)
{
	int	err;
	int	i;

	err = 0;
	if (args[0] == NULL)
		print_export(env, fd);
	else
	{
		i = -1;
		while (args[++i])
			if (add_export(env, args[i], fd) == 1)
				err = 1;
	}
	return (err);
}