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Edit File: random.h
/* Interfaces for obtaining random bytes. Copyright (C) 2016-2021 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 <https://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 #define GRND_INSECURE 0x04 __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 */