99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
|
/* Substitute for <sys/random.h>.
|
||
|
|
Copyright (C) 2020-2022 Free Software Foundation, Inc.
|
||
|
|
|
||
|
|
This file 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.
|
||
|
|
|
||
|
|
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
# if __GNUC__ >= 3
|
||
|
|
@PRAGMA_SYSTEM_HEADER@
|
||
|
|
# endif
|
||
|
|
@PRAGMA_COLUMNS@
|
||
|
|
|
||
|
|
#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
|
||
|
|
|
||
|
|
#if @HAVE_SYS_RANDOM_H@
|
||
|
|
|
||
|
|
/* On uClibc < 1.0.35, <sys/random.h> assumes prior inclusion of <stddef.h>.
|
||
|
|
Do not use __UCLIBC__ here, as it might not be defined yet.
|
||
|
|
But avoid namespace pollution on glibc systems. */
|
||
|
|
# ifndef __GLIBC__
|
||
|
|
# include <stddef.h>
|
||
|
|
# endif
|
||
|
|
/* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>.
|
||
|
|
On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that
|
||
|
|
includes <Availability.h>, such as <stdlib.h> or <unistd.h>. */
|
||
|
|
# if defined __APPLE__ && defined __MACH__ /* Mac OS X */
|
||
|
|
# include <sys/types.h>
|
||
|
|
# include <stdlib.h>
|
||
|
|
# endif
|
||
|
|
|
||
|
|
/* The include_next requires a split double-inclusion guard. */
|
||
|
|
# @INCLUDE_NEXT@ @NEXT_SYS_RANDOM_H@
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
|
||
|
|
#define _@GUARD_PREFIX@_SYS_RANDOM_H
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
|
||
|
|
/* Define the GRND_* constants. */
|
||
|
|
#ifndef GRND_NONBLOCK
|
||
|
|
# define GRND_NONBLOCK 1
|
||
|
|
# define GRND_RANDOM 2
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
|
||
|
|
|
||
|
|
/* The definition of _GL_ARG_NONNULL is copied here. */
|
||
|
|
|
||
|
|
/* The definition of _GL_WARN_ON_USE is copied here. */
|
||
|
|
|
||
|
|
|
||
|
|
/* Declare overridden functions. */
|
||
|
|
|
||
|
|
|
||
|
|
#if @GNULIB_GETRANDOM@
|
||
|
|
/* Fill a buffer with random bytes. */
|
||
|
|
# if @REPLACE_GETRANDOM@
|
||
|
|
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
|
||
|
|
# undef getrandom
|
||
|
|
# define getrandom rpl_getrandom
|
||
|
|
# endif
|
||
|
|
_GL_FUNCDECL_RPL (getrandom, ssize_t,
|
||
|
|
(void *buffer, size_t length, unsigned int flags)
|
||
|
|
_GL_ARG_NONNULL ((1)));
|
||
|
|
_GL_CXXALIAS_RPL (getrandom, ssize_t,
|
||
|
|
(void *buffer, size_t length, unsigned int flags));
|
||
|
|
# else
|
||
|
|
# if !@HAVE_GETRANDOM@
|
||
|
|
_GL_FUNCDECL_SYS (getrandom, ssize_t,
|
||
|
|
(void *buffer, size_t length, unsigned int flags)
|
||
|
|
_GL_ARG_NONNULL ((1)));
|
||
|
|
# endif
|
||
|
|
_GL_CXXALIAS_SYS (getrandom, ssize_t,
|
||
|
|
(void *buffer, size_t length, unsigned int flags));
|
||
|
|
# endif
|
||
|
|
_GL_CXXALIASWARN (getrandom);
|
||
|
|
#elif defined GNULIB_POSIXCHECK
|
||
|
|
# undef getrandom
|
||
|
|
# if HAVE_RAW_DECL_GETRANDOM
|
||
|
|
_GL_WARN_ON_USE (getrandom, "getrandom is unportable - "
|
||
|
|
"use gnulib module getrandom for portability");
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
|
||
|
|
#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
|