/* dirfd -- Return the file descriptor used by a DIR stream. Hurd version. Copyright (C) 1995-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library 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 2.1 of the License, or (at your option) any later version. The GNU C Library 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 the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #include <dirent.h> #include <dirstream.h> #include <hurd/fd.h> #include <errno.h> int __dirfd (DIR *dirp) { int fd; HURD_CRITICAL_BEGIN; __mutex_lock (&_hurd_dtable_lock); for (fd = 0; fd < _hurd_dtablesize; ++fd) if (_hurd_dtable[fd] == dirp->__fd) break; if (fd == _hurd_dtablesize) { errno = EINVAL; fd = -1; } __mutex_unlock (&_hurd_dtable_lock); HURD_CRITICAL_END; return fd; } weak_alias (__dirfd, dirfd) libc_hidden_def (dirfd)