/* dirfd.c -- return the file descriptor associated with an open DIR* Copyright (C) 2001, 2006, 2008-2014 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* Written by Jim Meyering. */ #include <config.h> #include <dirent.h> #include <errno.h> int dirfd (DIR *dir_p) { int fd = DIR_TO_FD (dir_p); if (fd == -1) errno = ENOTSUP; return fd; }