42_minishell/redirection/check.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   check.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: cchauvet <cchauvet@student.42angouleme.fr  +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/03/29 17:32:06 by cchauvet          #+#    #+#             */
/*   Updated: 2023/04/07 15:06:39 by alouis-j         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./redirection_private.h"
#include <stdbool.h>

static bool	ft_check_heredoc(t_data *data, t_cmd *cmd,
				char *redirection_identifier, char *redirection)
{
	int	fd;

	if (ft_strcmp(redirection_identifier, "<<") == 0)
	{
		if (cmd->fd_in[0] == -2)
			return (0);
		fd = ft_heredoc(data, redirection);
		if (fd == -2)
			return (1);
		else
		{
			if (cmd->fd_in[0] > 2)
				close(cmd->fd_in[0]);
			cmd->fd_in[0] = fd;
		}
	}
	return (0);
}

static bool	ft_check_infile(t_data *data, t_cmd *cmd,
				char *redirection_identifier, char *redirection)
{
	int	fd;

	if (ft_strcmp(redirection_identifier, "<") == 0)
	{
		if (cmd->fd_in[0] == -2)
			return (0);
		if (ft_file_is_readable(data, redirection))
		{
			fd = open(redirection, O_RDONLY);
			if (cmd->fd_in[0] > 2)
				close(cmd->fd_in[0]);
			cmd->fd_in[0] = fd;
		}
		else
		{
			if (cmd->fd_in[0] > 2)
				close(cmd->fd_in[0]);
			cmd->fd_in[0] = -2;
			return (0);
		}
	}
	return (0);
}

static bool	ft_check_outfile(t_data *data, t_cmd *cmd,
				char *redirection_identifier, char *redirection)
{
	int	fd;

	if (ft_strcmp(redirection_identifier, ">") == 0)
	{
		if (cmd->fd_out[0] == -2)
			return (0);
		if (ft_file_is_writable(data, redirection))
		{
			fd = open(redirection,
					O_WRONLY | O_TRUNC | O_CREAT, 0644);
			if (cmd->fd_out[0] > 2)
				close(cmd->fd_out[0]);
			cmd->fd_out[0] = fd;
		}
		else
		{
			if (cmd->fd_out[0] > 2)
				close(cmd->fd_out[0]);
			cmd->fd_out[0] = -2;
			return (0);
		}
	}
	return (0);
}

static bool	ft_check_outfile_append(t_data *data, t_cmd *cmd,
				char *redirection_identifier, char *redirection)
{
	int	fd;

	if (ft_strcmp(redirection_identifier, ">>") == 0)
	{
		if (cmd->fd_out[0] == -2)
			return (0);
		if (ft_file_is_appendable(data, redirection))
		{
			fd = open(redirection,
					O_WRONLY | O_APPEND | O_CREAT, 0644);
			if (cmd->fd_out[0] > 2)
				close(cmd->fd_out[0]);
			cmd->fd_out[0] = fd;
		}
		else
		{
			if (cmd->fd_out[0] > 2)
				close(cmd->fd_out[0]);
			cmd->fd_out[0] = -2;
		}
	}
	return (0);
}

bool	ft_check_redirection(t_data *data, t_cmd *cmd,
				char *redirection_identifier, char *redirection)
{
	char	*str;
	bool	out;

	if (ft_is_in("<>", redirection_identifier[0])
		&& ft_is_in("<>", redirection[0]))
	{
		ft_eprintf("minishell: %s: invalid redirection file\n", redirection);
		return (1);
	}
	str = ft_strdup(redirection);
	if (str == NULL)
	{
		ft_eprintf("minishell: malloc failed\n");
		return (1);
	}
	ft_quote_remover(str);
	out = 0;
	if (ft_check_heredoc(data, cmd, redirection_identifier, str)
		|| ft_check_infile(data, cmd, redirection_identifier, str)
		|| ft_check_outfile(data, cmd, redirection_identifier, str)
		|| ft_check_outfile_append(data, cmd, redirection_identifier, str))
		out = 1;
	free(str);
	return (out);
}