minishell/redir.c at master · yuchi1025/minishell · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   redir.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: yucchen <yucchen@student.42singapore.sg    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2025/12/02 16:25:28 by yucchen           #+#    #+#             */
/*   Updated: 2026/01/09 14:57:10 by yucchen          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "executor.h"

static void	unlink_file(t_redir	*redir)
{
	if (redir->is_heredoc_tmp)
		unlink(redir->file);
}

int	apply_redirs(t_cmd *cmd)
{
	int		fd;
	t_redir	*redir;

	redir = cmd->redirs;
	while (redir)
	{
		if (redir->type == R_IN)
			fd = open(redir->file, O_RDONLY);
		else if (redir->type == R_OUT)
			fd = open(redir->file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
		else if (redir->type == R_APPEND)
			fd = open(redir->file, O_WRONLY | O_CREAT | O_APPEND, 0644);
		if (fd == -1)
			return (unlink_file(redir), perror(redir->file), 1);
		if (redir->type == R_IN && dup2(fd, STDIN_FILENO) == -1)
			return (unlink_file(redir), perror("dup2"), close(fd), 1);
		if ((redir->type == R_OUT || redir->type == R_APPEND)
			&& dup2(fd, STDOUT_FILENO) == -1)
			return (perror("dup2"), close(fd), 1);
		close(fd);
		unlink_file(redir);
		redir = redir->next;
	}
	return (0);
}

int	apply_redirs_touch(t_cmd *cmd)
{
	int		fd;
	t_redir	*redir;

	redir = cmd->redirs;
	while (redir)
	{
		if (redir->type == R_IN)
			fd = open(redir->file, O_RDONLY);
		else if (redir->type == R_OUT)
			fd = open(redir->file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
		else if (redir->type == R_APPEND)
			fd = open(redir->file, O_WRONLY | O_CREAT | O_APPEND, 0644);
		if (fd == -1)
		{
			if (redir->is_heredoc_tmp)
				unlink(redir->file);
			return (perror(redir->file), 1);
		}
		close(fd);
		if (redir->is_heredoc_tmp)
			unlink(redir->file);
		redir = redir->next;
	}
	return (0);
}