/* Change the protections of file relative to open directory.  Hurd version.

   Copyright (C) 2006-2018 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 <errno.h>

#include <fcntl.h>

#include <stddef.h>

#include <unistd.h>

#include <sys/types.h>

#include <hurd.h>

#include <hurd/fd.h>

int

fchmodat (int fd, const char *file, mode_t mode, int flag)

{

  error_t err;

  file_t port = __file_name_lookup_at (fd, flag, file, 0, 0);

  if (port == MACH_PORT_NULL)

    return -1;

  err = __file_chmod (port, mode);

  __mach_port_deallocate (__mach_task_self (), port);

  if (err)

    return __hurd_fail (err);

  return 0;

}