1/* Substitute for <sys/random.h>.
2   Copyright (C) 2020 Free Software Foundation, Inc.
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 3, or (at your option)
7   any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
16
17# if __GNUC__ >= 3
18@PRAGMA_SYSTEM_HEADER@
19# endif
20@PRAGMA_COLUMNS@
21
22#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
23
24#if @HAVE_SYS_RANDOM_H@
25
26/* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>.
27   On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that
28   includes <Availability.h>, such as <stdlib.h> or <unistd.h>.  */
29# if defined __APPLE__ && defined __MACH__                  /* Mac OS X */
30#  include <sys/types.h>
31#  include <stdlib.h>
32# endif
33
34/* The include_next requires a split double-inclusion guard.  */
35# @INCLUDE_NEXT@ @NEXT_SYS_RANDOM_H@
36
37#endif
38
39#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
40#define _@GUARD_PREFIX@_SYS_RANDOM_H
41
42#include <sys/types.h>
43
44/* Define the GRND_* constants.  */
45#ifndef GRND_NONBLOCK
46# define GRND_NONBLOCK 1
47# define GRND_RANDOM 2
48#endif
49
50/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
51
52/* The definition of _GL_ARG_NONNULL is copied here.  */
53
54/* The definition of _GL_WARN_ON_USE is copied here.  */
55
56
57/* Declare overridden functions.  */
58
59
60#if @GNULIB_GETRANDOM@
61/* Fill a buffer with random bytes.  */
62# if @REPLACE_GETRANDOM@
63#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
64#   undef getrandom
65#   define getrandom rpl_getrandom
66#  endif
67_GL_FUNCDECL_RPL (getrandom, ssize_t,
68                  (void *buffer, size_t length, unsigned int flags)
69                  _GL_ARG_NONNULL ((1)));
70_GL_CXXALIAS_RPL (getrandom, ssize_t,
71                  (void *buffer, size_t length, unsigned int flags));
72# else
73#  if !@HAVE_GETRANDOM@
74_GL_FUNCDECL_SYS (getrandom, ssize_t,
75                  (void *buffer, size_t length, unsigned int flags)
76                  _GL_ARG_NONNULL ((1)));
77#  endif
78_GL_CXXALIAS_SYS (getrandom, ssize_t,
79                  (void *buffer, size_t length, unsigned int flags));
80# endif
81_GL_CXXALIASWARN (getrandom);
82#elif defined GNULIB_POSIXCHECK
83# undef getrandom
84# if HAVE_RAW_DECL_GETRANDOM
85_GL_WARN_ON_USE (getrandom, "getrandom is unportable - "
86                 "use gnulib module getrandom for portability");
87# endif
88#endif
89
90
91#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
92#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
93