1/* Checking macros for mq functions.
 2   Copyright (C) 2007-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#ifndef	_FCNTL_H
20# error "Never include <bits/mqueue2.h> directly; use <mqueue.h> instead."
21#endif
22
23/* Check that calls to mq_open with O_CREAT set have an appropriate third and fourth
24   parameter.  */
25extern mqd_t mq_open (const char *__name, int __oflag, ...)
26     __THROW __nonnull ((1));
27extern mqd_t __mq_open_2 (const char *__name, int __oflag)
28     __THROW __nonnull ((1));
29extern mqd_t __REDIRECT_NTH (__mq_open_alias, (const char *__name,
30					       int __oflag, ...), mq_open)
31     __nonnull ((1));
32
33#ifdef __va_arg_pack_len
34__errordecl (__mq_open_wrong_number_of_args,
35	     "mq_open can be called either with 2 or 4 arguments");
36__errordecl (__mq_open_missing_mode_and_attr,
37	     "mq_open with O_CREAT in second argument needs 4 arguments");
38
39__fortify_function mqd_t
40__NTH (mq_open (const char *__name, int __oflag, ...))
41{
42  if (__va_arg_pack_len () != 0 && __va_arg_pack_len () != 2)
43    __mq_open_wrong_number_of_args ();
44
45  if (__builtin_constant_p (__oflag))
46    {
47      if ((__oflag & O_CREAT) != 0 && __va_arg_pack_len () == 0)
48	{
49	  __mq_open_missing_mode_and_attr ();
50	  return __mq_open_2 (__name, __oflag);
51	}
52      return __mq_open_alias (__name, __oflag, __va_arg_pack ());
53    }
54
55  if (__va_arg_pack_len () == 0)
56    return __mq_open_2 (__name, __oflag);
57
58  return __mq_open_alias (__name, __oflag, __va_arg_pack ());
59}
60#elif __fortify_use_clang
61__fortify_function_error_function __attribute_overloadable__ mqd_t
62__NTH (mq_open (__fortify_clang_overload_arg (const char *, , __name),
63		int __oflag, mode_t __mode, ...))
64     __fortify_clang_unavailable ("mq_open can be called either with 2 or 4 arguments");
65
66__fortify_function __attribute_overloadable__ mqd_t
67__NTH (mq_open (__fortify_clang_overload_arg (const char *, ,__name),
68		int __oflag, mode_t __mode, struct mq_attr *__attr))
69{
70  return __mq_open_alias (__name, __oflag, __mode, __attr);
71}
72
73__fortify_function __attribute_overloadable__ mqd_t
74__NTH (mq_open (__fortify_clang_overload_arg (const char *, ,__name),
75		int __oflag))
76     __fortify_clang_prefer_this_overload
77     __fortify_clang_error ((__oflag & O_CREAT),
78			     "mq_open with O_CREAT in second argument needs 4 arguments")
79{
80  return __mq_open_alias (__name, __oflag);
81}
82#endif