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