/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   e_externs.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 <sys/wait.h>
#include <libft.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>

#include "e_externs_next.h"
#include "f_fail.h"
#include "m_redirs.h"
#include "s_destroy.h"
#include "s_lcom.h"
#include "s_struct.h"

static void
	e_extern_child(const char *fullpath,
					t_lcom *ptr,
					t_msh *msh)
{
	dup_redirs(ptr, msh);
	execve(fullpath, ptr->argv, msh->envp);
	/* TODO: handle execve failed */
}

static void
	exec_path(const char fullpath[],
				t_lcom *ptr,
				t_msh *msh)
{
	pid_t	pid;
	int32_t	status;

	if ((pid = fork()) == 0)
	{
		e_extern_child(fullpath, ptr, msh);
	}
	else if (pid < 0)
	{
		/* TODO: handle fork failed */
	}
	else
	{
		while (wait(&status) != pid)
			;
		msh->ret = WEXITSTATUS(status);
	}
}

void
	e_extern(t_lcom *ptr,
				t_msh *msh)
{
	char	**envpath;
	char	*fullpath;

	if (ft_ischarset("/.", ptr->com[0]))
	{
		exec_path(ptr->com, ptr, msh);
		return ;
	}
	else if ((envpath = get_env_path(msh)) != NULL)
	{
		fullpath = search_in_path(ptr->com, envpath, msh);
		ft_delwords(envpath);
		if (fullpath == NULL)
		{
			f_fail_command_not_found(ptr->com);
		}
		else
		{
			exec_path(fullpath, ptr, msh);
			ft_memdel((void*)&fullpath);
		}
	}
}