1/* dirfd.c -- return the file descriptor associated with an open DIR*
2
3   Copyright (C) 2001, 2006, 2008-2010 Free Software Foundation, Inc.
4
5   This program is free software: you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18/* Written by Jim Meyering. */
19
20#include <config.h>
21
22#include <dirent.h>
23#include <errno.h>
24
25int
26dirfd (DIR *dir_p)
27{
28  int fd = DIR_TO_FD (dir_p);
29  if (fd == -1)
30    errno = ENOTSUP;
31  return fd;
32}
33