1/* Substitute for <sys/random.h>. 2 Copyright (C) 2020-2022 Free Software Foundation, Inc. 3 4 This file is free software: you can redistribute it and/or modify 5 it under the terms of the GNU Lesser General Public License as 6 published by the Free Software Foundation; either version 2.1 of the 7 License, or (at your option) any later version. 8 9 This file 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 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser 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 uClibc < 1.0.35, <sys/random.h> assumes prior inclusion of <stddef.h>. 27 Do not use __UCLIBC__ here, as it might not be defined yet. 28 But avoid namespace pollution on glibc systems. */ 29# ifndef __GLIBC__ 30# include <stddef.h> 31# endif 32/* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>. 33 On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that 34 includes <Availability.h>, such as <stdlib.h> or <unistd.h>. */ 35# if defined __APPLE__ && defined __MACH__ /* Mac OS X */ 36# include <sys/types.h> 37# include <stdlib.h> 38# endif 39 40/* The include_next requires a split double-inclusion guard. */ 41# @INCLUDE_NEXT@ @NEXT_SYS_RANDOM_H@ 42 43#endif 44 45#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H 46#define _@GUARD_PREFIX@_SYS_RANDOM_H 47 48#include <sys/types.h> 49 50/* Define the GRND_* constants. */ 51#ifndef GRND_NONBLOCK 52# define GRND_NONBLOCK 1 53# define GRND_RANDOM 2 54#endif 55 56/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ 57 58/* The definition of _GL_ARG_NONNULL is copied here. */ 59 60/* The definition of _GL_WARN_ON_USE is copied here. */ 61 62 63/* Declare overridden functions. */ 64 65 66#if @GNULIB_GETRANDOM@ 67/* Fill a buffer with random bytes. */ 68# if @REPLACE_GETRANDOM@ 69# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 70# undef getrandom 71# define getrandom rpl_getrandom 72# endif 73_GL_FUNCDECL_RPL (getrandom, ssize_t, 74 (void *buffer, size_t length, unsigned int flags) 75 _GL_ARG_NONNULL ((1))); 76_GL_CXXALIAS_RPL (getrandom, ssize_t, 77 (void *buffer, size_t length, unsigned int flags)); 78# else 79# if !@HAVE_GETRANDOM@ 80_GL_FUNCDECL_SYS (getrandom, ssize_t, 81 (void *buffer, size_t length, unsigned int flags) 82 _GL_ARG_NONNULL ((1))); 83# endif 84_GL_CXXALIAS_SYS (getrandom, ssize_t, 85 (void *buffer, size_t length, unsigned int flags)); 86# endif 87_GL_CXXALIASWARN (getrandom); 88#elif defined GNULIB_POSIXCHECK 89# undef getrandom 90# if HAVE_RAW_DECL_GETRANDOM 91_GL_WARN_ON_USE (getrandom, "getrandom is unportable - " 92 "use gnulib module getrandom for portability"); 93# endif 94#endif 95 96 97#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */ 98#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */ 99