lib/dirfd.c

   1 /* dirfd.c -- return the file descriptor associated with an open DIR*
   2
   3    Copyright (C) 2001, 2006, 2008-2015 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
  25 int
  26 dirfd (DIR *dir_p)
  27 {
  28   int fd = DIR_TO_FD (dir_p);
  29   if (fd == -1)
  30     errno = ENOTSUP;
  31   return fd;
  32 }