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698be2d8 | 1 | /* Substitute for <sys/random.h>. |
9c9d63b1 | 2 | Copyright (C) 2020-2021 Free Software Foundation, Inc. |
698be2d8 CB |
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 | ||
9c9d63b1 PM |
26 | /* On uClibc, <sys/random.h> assumes prior inclusion of <stddef.h>. */ |
27 | # if defined __UCLIBC__ | |
28 | # include <stddef.h> | |
29 | # endif | |
698be2d8 CB |
30 | /* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>. |
31 | On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that | |
32 | includes <Availability.h>, such as <stdlib.h> or <unistd.h>. */ | |
33 | # if defined __APPLE__ && defined __MACH__ /* Mac OS X */ | |
34 | # include <sys/types.h> | |
35 | # include <stdlib.h> | |
36 | # endif | |
37 | ||
38 | /* The include_next requires a split double-inclusion guard. */ | |
39 | # @INCLUDE_NEXT@ @NEXT_SYS_RANDOM_H@ | |
40 | ||
41 | #endif | |
42 | ||
43 | #ifndef _@GUARD_PREFIX@_SYS_RANDOM_H | |
44 | #define _@GUARD_PREFIX@_SYS_RANDOM_H | |
45 | ||
46 | #include <sys/types.h> | |
47 | ||
48 | /* Define the GRND_* constants. */ | |
49 | #ifndef GRND_NONBLOCK | |
50 | # define GRND_NONBLOCK 1 | |
51 | # define GRND_RANDOM 2 | |
52 | #endif | |
53 | ||
54 | /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ | |
55 | ||
56 | /* The definition of _GL_ARG_NONNULL is copied here. */ | |
57 | ||
58 | /* The definition of _GL_WARN_ON_USE is copied here. */ | |
59 | ||
60 | ||
61 | /* Declare overridden functions. */ | |
62 | ||
63 | ||
64 | #if @GNULIB_GETRANDOM@ | |
65 | /* Fill a buffer with random bytes. */ | |
66 | # if @REPLACE_GETRANDOM@ | |
67 | # if !(defined __cplusplus && defined GNULIB_NAMESPACE) | |
68 | # undef getrandom | |
69 | # define getrandom rpl_getrandom | |
70 | # endif | |
71 | _GL_FUNCDECL_RPL (getrandom, ssize_t, | |
72 | (void *buffer, size_t length, unsigned int flags) | |
73 | _GL_ARG_NONNULL ((1))); | |
74 | _GL_CXXALIAS_RPL (getrandom, ssize_t, | |
75 | (void *buffer, size_t length, unsigned int flags)); | |
76 | # else | |
77 | # if !@HAVE_GETRANDOM@ | |
78 | _GL_FUNCDECL_SYS (getrandom, ssize_t, | |
79 | (void *buffer, size_t length, unsigned int flags) | |
80 | _GL_ARG_NONNULL ((1))); | |
81 | # endif | |
82 | _GL_CXXALIAS_SYS (getrandom, ssize_t, | |
83 | (void *buffer, size_t length, unsigned int flags)); | |
84 | # endif | |
85 | _GL_CXXALIASWARN (getrandom); | |
86 | #elif defined GNULIB_POSIXCHECK | |
87 | # undef getrandom | |
88 | # if HAVE_RAW_DECL_GETRANDOM | |
89 | _GL_WARN_ON_USE (getrandom, "getrandom is unportable - " | |
90 | "use gnulib module getrandom for portability"); | |
91 | # endif | |
92 | #endif | |
93 | ||
94 | ||
95 | #endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */ | |
96 | #endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */ |