42_minishell/redirection/heredoc.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   heredoc.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angoulem      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/17 15:36:26 by cchauvet          #+#    #+#             */
/*   Updated: 2023/04/17 12:14:11 by cchauvet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./redirection_private.h"
#include <readline/readline.h>
#include <unistd.h>

static bool	ft_fd_is_closed(int fd)
{
	int	fd2;

	fd2 = dup(fd);
	if (fd2 == -1)
		return (1);
	close(fd2);
	return (0);
}

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);
}

int	ft_heredoc2(t_data *data, char *line, char *stop, int fds[2])
{
	if (line == NULL)
	{
		if (ft_fd_is_closed(0))
		{
			close(fds[0]);
			fds[0] = -2;
			return (1);
		}
		else
		{
			ft_eprintf("\nbozoshell: warning: here-document at line 1%s",
				"delimited by end-of-file (wanted `adfsd')\n");
			return (1);
		}
	}
	if (ft_strcmp(line, stop) == 0)
		return (1);
	if (ft_format_and_write(data, line, fds[1]))
	{
		close(fds[0]);
		fds[0] = -2;
		return (1);
	}
	return (0);
}

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

	stdin_bak = dup(0);
	if (stdin_bak == -1)
		return (1);
	if (pipe(fds))
	{
		close(stdin_bak);
		return (1);
	}
	line = readline("> ");
	while (ft_heredoc2(data, line, stop, fds) == 0)
	{
		free(line);
		line = readline("> ");
	}
	free(line);
	close(fds[1]);
	dup2(stdin_bak, 0);
	close(stdin_bak);
	return (fds[0]);
}