/* Checking macros for mq functions.

   Copyright (C) 2007-2018 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/>.  */

#ifndef	_FCNTL_H

# error "Never include <bits/mqueue2.h> directly; use <mqueue.h> instead."

#endif

/* Check that calls to mq_open with O_CREAT set have an appropriate third and fourth

   parameter.  */

extern mqd_t mq_open (const char *__name, int __oflag, ...)

     __THROW __nonnull ((1));

extern mqd_t __mq_open_2 (const char *__name, int __oflag)

     __THROW __nonnull ((1));

extern mqd_t __REDIRECT_NTH (__mq_open_alias, (const char *__name,

					       int __oflag, ...), mq_open)

     __nonnull ((1));

__errordecl (__mq_open_wrong_number_of_args,

	     "mq_open can be called either with 2 or 4 arguments");

__errordecl (__mq_open_missing_mode_and_attr,

	     "mq_open with O_CREAT in second argument needs 4 arguments");

__fortify_function mqd_t

__NTH (mq_open (const char *__name, int __oflag, ...))

{

  if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2)

    __mq_open_wrong_number_of_args ();

  if (__builtin_constant_p (__oflag))

    {

      if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0)

	{

	  __mq_open_missing_mode_and_attr ();

	  return __mq_open_2 (__name, __oflag);

	}

      return __mq_open_alias (__name, __oflag, __va_arg_pack ());

    }

  if (__va_arg_pack_len () == 0)

    return __mq_open_2 (__name, __oflag);

  return __mq_open_alias (__name, __oflag, __va_arg_pack ());

}