42_minishell/file.c

#include "minishell.h"

int	ft_file_is_readable(const char *path)
{
	int	readable;
	int	fd;

	fd = open(path, O_RDONLY);
	if (fd == -1)
	{
		ft_eprintf("minishell: %s: No such file or directory\n", path);
		return (0);
	}
	readable = read(fd, "", 0);
	if (readable == -1)
	{
		ft_eprintf("minishell: %s: Permission denied\n", path);
		return (0);
	}
	close(fd);
	return (1);
}

int	ft_file_is_writeable(const char *path)
{
	int	writeable;
	int	fd;

	fd = open(path, O_WRONLY | O_CREAT, 0644);
	if (fd == -1)
	{
		ft_eprintf("minishell: %s: Permission denied\n", path);
		return (0);
	}
	writeable = write(fd, "", 0);
	if (writeable == -1)
	{
		ft_eprintf("minishell: %s: Permission denied\n", path);
		return (0);
	}
	close(fd);
	return (1);
}

char	*ft_get_file_path(const char *infile)
{
	size_t	i;
	size_t	n;

	n = 1;
	while (infile[-n] == infile[-1])
		n++;
	i = 0;
	while (infile[i] == ' ')
		i++;
	if (infile[i] == '\0' || infile[i] == '>' || infile[i] == '<')
	{
		ft_eprintf("minishell: syntax error near ");
		if ((infile[0] == '<' && n > 3) || (infile[0] == '>' && n > 2))
			ft_eprintf("unexpected token `%c`\n", infile[i - 1]);
		else
			ft_eprintf("unexpected token `newline`\n");
		return (NULL);
	}
	return (ft_getstr(infile, i + 1));
}