/* Change the protections of file relative to open directory.  Linux 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 <stdio.h>

#include <string.h>

#include <unistd.h>

#include <sys/types.h>

#include <alloca.h>

#include <sysdep.h>

int

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

{

  if (flag & ~AT_SYMLINK_NOFOLLOW)

    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);

#ifndef __NR_lchmod		/* Linux so far has no lchmod syscall.  */

  if (flag & AT_SYMLINK_NOFOLLOW)

    return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOTSUP);

#endif

  return INLINE_SYSCALL (fchmodat, 3, fd, file, mode);

}