| /* Interfaces for obtaining random bytes. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library 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. |
| |
| The GNU C Library 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 the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _SYS_RANDOM_H |
| #define _SYS_RANDOM_H 1 |
| |
| #include <features.h> |
| #include <sys/types.h> |
| |
| /* Flags for use with getrandom. */ |
| #define GRND_NONBLOCK 0x01 |
| #define GRND_RANDOM 0x02 |
| |
| __BEGIN_DECLS |
| |
| /* Write LENGTH bytes of randomness starting at BUFFER. Return the |
| number of bytes written, or -1 on error. */ |
| ssize_t getrandom (void *__buffer, size_t __length, |
| unsigned int __flags) __wur; |
| |
| /* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on |
| success or -1 on error. */ |
| int getentropy (void *__buffer, size_t __length) __wur; |
| |
| __END_DECLS |
| |
| #endif /* _SYS_RANDOM_H */ |
