/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   u_path.c                                           :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rbousset <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/02/14 17:19:27 by rbousset          #+#    #+#             */
/*   Updated: 2020/02/14 17:19:29 by rbousset         ###   ########lyon.fr   */
/*                                                                            */
/* ************************************************************************** */

#include <libft.h>
#include <stddef.h>
#include <dirent.h>
#include <limits.h>

#include "s_struct.h"
#include "u_vars.h"

static void	u_get_fullpath(char fullpath[],
						const char p_path[],
						const char d_name[],
						size_t dstsize)
{
	const size_t	path_len = ft_strlen(p_path);
	const size_t	name_len = ft_strlen(d_name);

	fullpath[0] = C_NUL;
	if (path_len + name_len < dstsize)
	{
		(void)ft_memcpy(fullpath, p_path, path_len);
		*(fullpath + (path_len)) = '/';
		ft_memcpy(fullpath + path_len + 1, d_name, name_len);
		*(fullpath + (path_len + name_len + 1)) = '\0';
	}
}

uint8_t		u_search_in_path(char fullpath[],
							const char com[],
							size_t dstsize,
							t_msh *msh)
{
	struct dirent	*ent;
	char			tmp[ARG_MAX];
	char			*tok_path;
	DIR				*dir;

	if (u_get_var_value(tmp, "$PATH", ARG_MAX, msh) != 0)
		return (1);
	tok_path = ft_strtok(tmp, ":");
	while (tok_path != NULL)
	{
		if ((dir = opendir(tok_path)) != NULL)
		{
			while ((ent = readdir(dir)) != NULL)
			{
				if (ft_strncmp(com, ent->d_name, ft_strlen(com) + 1) == 0)
				{
					u_get_fullpath(fullpath, tok_path, ent->d_name, dstsize);
					closedir(dir);
					if (fullpath[0] == C_NUL)
						return (1);
					return (0);
				}
			}
			closedir(dir);
		}
		tok_path = ft_strtok(NULL, ":");
	}
	return (1);
}