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107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* Substitute for <sys/random.h>.
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Copyright (C) 2020-2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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# if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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# endif
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@PRAGMA_COLUMNS@
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#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
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#if @HAVE_SYS_RANDOM_H@
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/* On uClibc < 1.0.35, <sys/random.h> assumes prior inclusion of <stddef.h>.
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Do not use __UCLIBC__ here, as it might not be defined yet.
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But avoid namespace pollution on glibc systems. */
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# ifndef __GLIBC__
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# include <stddef.h>
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# endif
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/* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>.
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On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that
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includes <Availability.h>, such as <stdlib.h> or <unistd.h>. */
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# if defined __APPLE__ && defined __MACH__ /* Mac OS X */
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# include <sys/types.h>
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# include <stdlib.h>
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# endif
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/* The include_next requires a split double-inclusion guard. */
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# @INCLUDE_NEXT@ @NEXT_SYS_RANDOM_H@
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#endif
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#ifndef _@GUARD_PREFIX@_SYS_RANDOM_H
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#define _@GUARD_PREFIX@_SYS_RANDOM_H
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/* This file uses _GL_ATTRIBUTE_NODISCARD, GNULIB_POSIXCHECK,
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HAVE_RAW_DECL_*. */
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#if !_GL_CONFIG_H_INCLUDED
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#error "Please include config.h first."
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#endif
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#include <sys/types.h>
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/* Define the GRND_* constants. */
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#ifndef GRND_NONBLOCK
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# define GRND_NONBLOCK 1
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# define GRND_RANDOM 2
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#endif
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/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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/* The definition of _GL_ARG_NONNULL is copied here. */
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/* The definition of _GL_WARN_ON_USE is copied here. */
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/* Declare overridden functions. */
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#if @GNULIB_GETRANDOM@
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/* Fill a buffer with random bytes. */
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# if @REPLACE_GETRANDOM@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef getrandom
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# define getrandom rpl_getrandom
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# endif
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_GL_FUNCDECL_RPL (getrandom, ssize_t,
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(void *buffer, size_t length, unsigned int flags),
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_GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NODISCARD);
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_GL_CXXALIAS_RPL (getrandom, ssize_t,
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(void *buffer, size_t length, unsigned int flags));
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# else
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# if !@HAVE_GETRANDOM@
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_GL_FUNCDECL_SYS (getrandom, ssize_t,
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(void *buffer, size_t length, unsigned int flags),
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_GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NODISCARD);
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# endif
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_GL_CXXALIAS_SYS (getrandom, ssize_t,
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(void *buffer, size_t length, unsigned int flags));
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# endif
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# if __GLIBC__ + (__GLIBC_MINOR__ >= 25) > 2
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_GL_CXXALIASWARN (getrandom);
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# endif
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#elif defined GNULIB_POSIXCHECK
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# undef getrandom
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# if HAVE_RAW_DECL_GETRANDOM
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_GL_WARN_ON_USE (getrandom, "getrandom is unportable - "
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"use gnulib module getrandom for portability");
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# endif
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#endif
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#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
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#endif /* _@GUARD_PREFIX@_SYS_RANDOM_H */
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