1 /* Implementation of the getrandom system call.
2 Copyright (C) 2016-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <sys/random.h>
20 #include <errno.h>
21 #include <unistd.h>
22 #include <sysdep-cancel.h>
23
24 /* Write up to LENGTH bytes of randomness starting at BUFFER.
25 Return the number of bytes written, or -1 on error. */
26 ssize_t
__getrandom(void * buffer,size_t length,unsigned int flags)27 __getrandom (void *buffer, size_t length, unsigned int flags)
28 {
29 return SYSCALL_CANCEL (getrandom, buffer, length, flags);
30 }
31 libc_hidden_def (__getrandom)
32 weak_alias (__getrandom, getrandom)
33