42_minishell/redirection/heredoc.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   heredoc.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/17 15:36:26 by cchauvet          #+#    #+#             */
/*   Updated: 2023/04/07 15:11:17 by alouis-j         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./redirection_private.h"

int	*ft_get_heredoc(void)
{
	static int	heredoc = -1;

	return (&heredoc);
}

static int	ft_format_and_write(t_data *data, const char *str, int fd)
{
	char	*line_clean;

	line_clean = ft_env_filler(data, str);
	if (line_clean == NULL)
		return (1);
	ft_putendl_fd(line_clean, fd);
	free(line_clean);
	return (0);
}

static int	ft_heredoc3(char *stop, int fds[2])
{
	if (*ft_get_heredoc() == -1)
	{
		ft_putchar_fd('\n', 1);
		ft_closer(fds);
		return (1);
	}
	else
	{
		ft_eprintf("minishell: warning: here-document at line");
		ft_eprintf("1 delimited by end-of-file (wanted `%s')\n", stop);
		return (2);
	}
	return (0);
}

static int	ft_heredoc2(t_data *data, char *stop, int fds[2])
{
	char	*line;
	int		out;

	ft_printf("> ");
	line = get_next_line(*ft_get_heredoc());
	if (line == NULL)
	{
		out = ft_heredoc3(stop, fds);
		if (out)
			return (out);
	}
	line[ft_strlen(line) - 1] = '\0';
	if (ft_strcmp(line, stop) == 0)
	{
		free(line);
		return (2);
	}
	if (ft_format_and_write(data, line, fds[1]))
	{
		ft_closer(fds);
		free(line);
		return (1);
	}
	free(line);
	return (0);
}

int	ft_heredoc(t_data *data, char *stop)
{
	int		fds[2];
	int		return_code;

	if (pipe(fds) == -1)
		return (-1);
	*ft_get_heredoc() = dup(0);
	while (true)
	{
		return_code = ft_heredoc2(data, stop, fds);
		if (return_code == 2)
			break ;
		else if (return_code == 1)
		{
			if (*ft_get_heredoc() > 2)
				close(*ft_get_heredoc());
			*ft_get_heredoc() = -1;
			return (-2);
		}
	}
	close(*ft_get_heredoc());
	*ft_get_heredoc() = -1;
	close(fds[1]);
	return (fds[0]);
}